diff options
Diffstat (limited to 'vendor/clap/src/builder')
| -rw-r--r-- | vendor/clap/src/builder/action.rs | 344 | ||||
| -rw-r--r-- | vendor/clap/src/builder/app_settings.rs | 172 | ||||
| -rw-r--r-- | vendor/clap/src/builder/arg.rs | 4647 | ||||
| -rw-r--r-- | vendor/clap/src/builder/arg_group.rs | 596 | ||||
| -rw-r--r-- | vendor/clap/src/builder/arg_predicate.rs | 19 | ||||
| -rw-r--r-- | vendor/clap/src/builder/arg_settings.rs | 145 | ||||
| -rw-r--r-- | vendor/clap/src/builder/command.rs | 4703 | ||||
| -rw-r--r-- | vendor/clap/src/builder/debug_asserts.rs | 887 | ||||
| -rw-r--r-- | vendor/clap/src/builder/mod.rs | 60 | ||||
| -rw-r--r-- | vendor/clap/src/builder/os_str.rs | 336 | ||||
| -rw-r--r-- | vendor/clap/src/builder/possible_value.rs | 234 | ||||
| -rw-r--r-- | vendor/clap/src/builder/range.rs | 283 | ||||
| -rw-r--r-- | vendor/clap/src/builder/resettable.rs | 211 | ||||
| -rw-r--r-- | vendor/clap/src/builder/str.rs | 307 | ||||
| -rw-r--r-- | vendor/clap/src/builder/styled_str.rs | 349 | ||||
| -rw-r--r-- | vendor/clap/src/builder/tests.rs | 56 | ||||
| -rw-r--r-- | vendor/clap/src/builder/value_hint.rs | 95 | ||||
| -rw-r--r-- | vendor/clap/src/builder/value_parser.rs | 2435 |
18 files changed, 15879 insertions, 0 deletions
diff --git a/vendor/clap/src/builder/action.rs b/vendor/clap/src/builder/action.rs new file mode 100644 index 000000000..9739f8800 --- /dev/null +++ b/vendor/clap/src/builder/action.rs @@ -0,0 +1,344 @@ +/// Behavior of arguments when they are encountered while parsing +/// +/// # Examples +/// +#[cfg_attr(not(feature = "help"), doc = " ```ignore")] +#[cfg_attr(feature = "help", doc = " ```")] +/// # use clap::Command; +/// # use clap::Arg; +/// let cmd = Command::new("mycmd") +/// .arg( +/// Arg::new("special-help") +/// .short('?') +/// .action(clap::ArgAction::Help) +/// ); +/// +/// // Existing help still exists +/// let err = cmd.clone().try_get_matches_from(["mycmd", "-h"]).unwrap_err(); +/// assert_eq!(err.kind(), clap::error::ErrorKind::DisplayHelp); +/// +/// // New help available +/// let err = cmd.try_get_matches_from(["mycmd", "-?"]).unwrap_err(); +/// assert_eq!(err.kind(), clap::error::ErrorKind::DisplayHelp); +/// ``` +#[derive(Clone, Debug)] +#[non_exhaustive] +#[allow(missing_copy_implementations)] // In the future, we may accept `Box<dyn ...>` +pub enum ArgAction { + /// When encountered, store the associated value(s) in [`ArgMatches`][crate::ArgMatches] + /// + /// **NOTE:** If the argument has previously been seen, it will result in a + /// [`ArgumentConflict`][crate::error::ErrorKind::ArgumentConflict] unless + /// [`Command::args_override_self(true)`][crate::Command::args_override_self] is set. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// # use clap::Arg; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("flag") + /// .long("flag") + /// .action(clap::ArgAction::Set) + /// ); + /// + /// let matches = cmd.try_get_matches_from(["mycmd", "--flag", "value"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_many::<String>("flag").unwrap_or_default().map(|v| v.as_str()).collect::<Vec<_>>(), + /// vec!["value"] + /// ); + /// ``` + Set, + /// When encountered, store the associated value(s) in [`ArgMatches`][crate::ArgMatches] + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// # use clap::Arg; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("flag") + /// .long("flag") + /// .action(clap::ArgAction::Append) + /// ); + /// + /// let matches = cmd.try_get_matches_from(["mycmd", "--flag", "value1", "--flag", "value2"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_many::<String>("flag").unwrap_or_default().map(|v| v.as_str()).collect::<Vec<_>>(), + /// vec!["value1", "value2"] + /// ); + /// ``` + Append, + /// When encountered, act as if `"true"` was encountered on the command-line + /// + /// If no [`default_value`][super::Arg::default_value] is set, it will be `false`. + /// + /// No value is allowed. To optionally accept a value, see + /// [`Arg::default_missing_value`][super::Arg::default_missing_value] + /// + /// **NOTE:** If the argument has previously been seen, it will result in a + /// [`ArgumentConflict`][crate::error::ErrorKind::ArgumentConflict] unless + /// [`Command::args_override_self(true)`][crate::Command::args_override_self] is set. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// # use clap::Arg; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("flag") + /// .long("flag") + /// .action(clap::ArgAction::SetTrue) + /// ); + /// + /// let matches = cmd.clone().try_get_matches_from(["mycmd", "--flag"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_flag("flag"), + /// true + /// ); + /// + /// let matches = cmd.try_get_matches_from(["mycmd"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_flag("flag"), + /// false + /// ); + /// ``` + /// + /// You can use [`TypedValueParser::map`][crate::builder::TypedValueParser::map] to have the + /// flag control an application-specific type: + /// ```rust + /// # use clap::Command; + /// # use clap::Arg; + /// # use clap::builder::TypedValueParser as _; + /// # use clap::builder::BoolishValueParser; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("flag") + /// .long("flag") + /// .action(clap::ArgAction::SetTrue) + /// .value_parser( + /// BoolishValueParser::new() + /// .map(|b| -> usize { + /// if b { 10 } else { 5 } + /// }) + /// ) + /// ); + /// + /// let matches = cmd.clone().try_get_matches_from(["mycmd", "--flag"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_one::<usize>("flag").copied(), + /// Some(10) + /// ); + /// + /// let matches = cmd.try_get_matches_from(["mycmd"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_one::<usize>("flag").copied(), + /// Some(5) + /// ); + /// ``` + SetTrue, + /// When encountered, act as if `"false"` was encountered on the command-line + /// + /// If no [`default_value`][super::Arg::default_value] is set, it will be `true`. + /// + /// No value is allowed. To optionally accept a value, see + /// [`Arg::default_missing_value`][super::Arg::default_missing_value] + /// + /// **NOTE:** If the argument has previously been seen, it will result in a + /// [`ArgumentConflict`][crate::error::ErrorKind::ArgumentConflict] unless + /// [`Command::args_override_self(true)`][crate::Command::args_override_self] is set. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// # use clap::Arg; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("flag") + /// .long("flag") + /// .action(clap::ArgAction::SetFalse) + /// ); + /// + /// let matches = cmd.clone().try_get_matches_from(["mycmd", "--flag"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_flag("flag"), + /// false + /// ); + /// + /// let matches = cmd.try_get_matches_from(["mycmd"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_flag("flag"), + /// true + /// ); + /// ``` + SetFalse, + /// When encountered, increment a `u8` counter + /// + /// If no [`default_value`][super::Arg::default_value] is set, it will be `0`. + /// + /// No value is allowed. To optionally accept a value, see + /// [`Arg::default_missing_value`][super::Arg::default_missing_value] + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// # use clap::Arg; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("flag") + /// .long("flag") + /// .action(clap::ArgAction::Count) + /// ); + /// + /// let matches = cmd.clone().try_get_matches_from(["mycmd", "--flag", "--flag"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_count("flag"), + /// 2 + /// ); + /// + /// let matches = cmd.try_get_matches_from(["mycmd"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_count("flag"), + /// 0 + /// ); + /// ``` + Count, + /// When encountered, display [`Command::print_help`][super::Command::print_help] + /// + /// Depending on the flag, [`Command::print_long_help`][super::Command::print_long_help] may be shown + /// + /// # Examples + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::Command; + /// # use clap::Arg; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("special-help") + /// .short('?') + /// .action(clap::ArgAction::Help) + /// ); + /// + /// // Existing help still exists + /// let err = cmd.clone().try_get_matches_from(["mycmd", "-h"]).unwrap_err(); + /// assert_eq!(err.kind(), clap::error::ErrorKind::DisplayHelp); + /// + /// // New help available + /// let err = cmd.try_get_matches_from(["mycmd", "-?"]).unwrap_err(); + /// assert_eq!(err.kind(), clap::error::ErrorKind::DisplayHelp); + /// ``` + Help, + /// When encountered, display [`Command::version`][super::Command::version] + /// + /// Depending on the flag, [`Command::long_version`][super::Command::long_version] may be shown + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// # use clap::Arg; + /// let cmd = Command::new("mycmd") + /// .version("1.0.0") + /// .arg( + /// Arg::new("special-version") + /// .long("special-version") + /// .action(clap::ArgAction::Version) + /// ); + /// + /// // Existing help still exists + /// let err = cmd.clone().try_get_matches_from(["mycmd", "--version"]).unwrap_err(); + /// assert_eq!(err.kind(), clap::error::ErrorKind::DisplayVersion); + /// + /// // New help available + /// let err = cmd.try_get_matches_from(["mycmd", "--special-version"]).unwrap_err(); + /// assert_eq!(err.kind(), clap::error::ErrorKind::DisplayVersion); + /// ``` + Version, +} + +impl ArgAction { + /// Returns whether this action accepts values on the command-line + /// + /// [`default_values`][super::Arg::default_values] and [`env`][super::Arg::env] may still be + /// processed. + pub fn takes_values(&self) -> bool { + match self { + Self::Set => true, + Self::Append => true, + Self::SetTrue => false, + Self::SetFalse => false, + Self::Count => false, + Self::Help => false, + Self::Version => false, + } + } + + pub(crate) fn default_value(&self) -> Option<&'static std::ffi::OsStr> { + match self { + Self::Set => None, + Self::Append => None, + Self::SetTrue => Some(std::ffi::OsStr::new("false")), + Self::SetFalse => Some(std::ffi::OsStr::new("true")), + Self::Count => Some(std::ffi::OsStr::new("0")), + Self::Help => None, + Self::Version => None, + } + } + + pub(crate) fn default_missing_value(&self) -> Option<&'static std::ffi::OsStr> { + match self { + Self::Set => None, + Self::Append => None, + Self::SetTrue => Some(std::ffi::OsStr::new("true")), + Self::SetFalse => Some(std::ffi::OsStr::new("false")), + Self::Count => None, + Self::Help => None, + Self::Version => None, + } + } + + pub(crate) fn default_value_parser(&self) -> Option<super::ValueParser> { + match self { + Self::Set => None, + Self::Append => None, + Self::SetTrue => Some(super::ValueParser::bool()), + Self::SetFalse => Some(super::ValueParser::bool()), + Self::Count => Some(crate::value_parser!(u8).into()), + Self::Help => None, + Self::Version => None, + } + } + + #[cfg(debug_assertions)] + pub(crate) fn value_type_id(&self) -> Option<crate::parser::AnyValueId> { + use crate::parser::AnyValueId; + + match self { + Self::Set => None, + Self::Append => None, + Self::SetTrue => None, + Self::SetFalse => None, + Self::Count => Some(AnyValueId::of::<CountType>()), + Self::Help => None, + Self::Version => None, + } + } +} + +pub(crate) type CountType = u8; diff --git a/vendor/clap/src/builder/app_settings.rs b/vendor/clap/src/builder/app_settings.rs new file mode 100644 index 000000000..7a9ff8c69 --- /dev/null +++ b/vendor/clap/src/builder/app_settings.rs @@ -0,0 +1,172 @@ +// Std +use std::ops::BitOr; + +#[allow(unused)] +use crate::Arg; +#[allow(unused)] +use crate::Command; + +// Third party +use bitflags::bitflags; + +#[doc(hidden)] +#[derive(Debug, Copy, Clone, PartialEq, Eq)] +pub(crate) struct AppFlags(Flags); + +impl Default for AppFlags { + fn default() -> Self { + AppFlags(Flags::COLOR_AUTO) + } +} + +/// Application level settings, which affect how [`Command`] operates +/// +/// **NOTE:** When these settings are used, they apply only to current command, and are *not* +/// propagated down or up through child or parent subcommands +/// +/// [`Command`]: crate::Command +#[derive(Debug, PartialEq, Copy, Clone)] +#[non_exhaustive] +pub(crate) enum AppSettings { + IgnoreErrors, + AllowHyphenValues, + AllowNegativeNumbers, + AllArgsOverrideSelf, + AllowMissingPositional, + TrailingVarArg, + DontDelimitTrailingValues, + InferLongArgs, + InferSubcommands, + SubcommandRequired, + AllowExternalSubcommands, + Multicall, + SubcommandsNegateReqs, + ArgsNegateSubcommands, + SubcommandPrecedenceOverArg, + ArgRequiredElseHelp, + NextLineHelp, + DisableColoredHelp, + DisableHelpFlag, + DisableHelpSubcommand, + DisableVersionFlag, + PropagateVersion, + Hidden, + HidePossibleValues, + HelpExpected, + NoBinaryName, + #[allow(dead_code)] + ColorAuto, + ColorAlways, + ColorNever, + Built, + BinNameBuilt, +} + +bitflags! { + struct Flags: u64 { + const SC_NEGATE_REQS = 1; + const SC_REQUIRED = 1 << 1; + const ARG_REQUIRED_ELSE_HELP = 1 << 2; + const PROPAGATE_VERSION = 1 << 3; + const DISABLE_VERSION_FOR_SC = 1 << 4; + const WAIT_ON_ERROR = 1 << 6; + const DISABLE_VERSION_FLAG = 1 << 10; + const HIDDEN = 1 << 11; + const TRAILING_VARARG = 1 << 12; + const NO_BIN_NAME = 1 << 13; + const ALLOW_UNK_SC = 1 << 14; + const LEADING_HYPHEN = 1 << 16; + const NO_POS_VALUES = 1 << 17; + const NEXT_LINE_HELP = 1 << 18; + const DISABLE_COLORED_HELP = 1 << 20; + const COLOR_ALWAYS = 1 << 21; + const COLOR_AUTO = 1 << 22; + const COLOR_NEVER = 1 << 23; + const DONT_DELIM_TRAIL = 1 << 24; + const ALLOW_NEG_NUMS = 1 << 25; + const DISABLE_HELP_SC = 1 << 27; + const ARGS_NEGATE_SCS = 1 << 29; + const PROPAGATE_VALS_DOWN = 1 << 30; + const ALLOW_MISSING_POS = 1 << 31; + const TRAILING_VALUES = 1 << 32; + const BUILT = 1 << 33; + const BIN_NAME_BUILT = 1 << 34; + const VALID_ARG_FOUND = 1 << 35; + const INFER_SUBCOMMANDS = 1 << 36; + const CONTAINS_LAST = 1 << 37; + const ARGS_OVERRIDE_SELF = 1 << 38; + const HELP_REQUIRED = 1 << 39; + const SUBCOMMAND_PRECEDENCE_OVER_ARG = 1 << 40; + const DISABLE_HELP_FLAG = 1 << 41; + const INFER_LONG_ARGS = 1 << 43; + const IGNORE_ERRORS = 1 << 44; + const MULTICALL = 1 << 45; + const EXPAND_HELP_SUBCOMMAND_TREES = 1 << 46; + const NO_OP = 0; + } +} + +impl_settings! { AppSettings, AppFlags, + ArgRequiredElseHelp + => Flags::ARG_REQUIRED_ELSE_HELP, + SubcommandPrecedenceOverArg + => Flags::SUBCOMMAND_PRECEDENCE_OVER_ARG, + ArgsNegateSubcommands + => Flags::ARGS_NEGATE_SCS, + AllowExternalSubcommands + => Flags::ALLOW_UNK_SC, + AllowHyphenValues + => Flags::LEADING_HYPHEN, + AllowNegativeNumbers + => Flags::ALLOW_NEG_NUMS, + AllowMissingPositional + => Flags::ALLOW_MISSING_POS, + ColorAlways + => Flags::COLOR_ALWAYS, + ColorAuto + => Flags::COLOR_AUTO, + ColorNever + => Flags::COLOR_NEVER, + DontDelimitTrailingValues + => Flags::DONT_DELIM_TRAIL, + DisableColoredHelp + => Flags::DISABLE_COLORED_HELP, + DisableHelpSubcommand + => Flags::DISABLE_HELP_SC, + DisableHelpFlag + => Flags::DISABLE_HELP_FLAG, + DisableVersionFlag + => Flags::DISABLE_VERSION_FLAG, + PropagateVersion + => Flags::PROPAGATE_VERSION, + HidePossibleValues + => Flags::NO_POS_VALUES, + HelpExpected + => Flags::HELP_REQUIRED, + Hidden + => Flags::HIDDEN, + Multicall + => Flags::MULTICALL, + NoBinaryName + => Flags::NO_BIN_NAME, + SubcommandsNegateReqs + => Flags::SC_NEGATE_REQS, + SubcommandRequired + => Flags::SC_REQUIRED, + TrailingVarArg + => Flags::TRAILING_VARARG, + NextLineHelp + => Flags::NEXT_LINE_HELP, + IgnoreErrors + => Flags::IGNORE_ERRORS, + Built + => Flags::BUILT, + BinNameBuilt + => Flags::BIN_NAME_BUILT, + InferSubcommands + => Flags::INFER_SUBCOMMANDS, + AllArgsOverrideSelf + => Flags::ARGS_OVERRIDE_SELF, + InferLongArgs + => Flags::INFER_LONG_ARGS +} diff --git a/vendor/clap/src/builder/arg.rs b/vendor/clap/src/builder/arg.rs new file mode 100644 index 000000000..ca2d6acbc --- /dev/null +++ b/vendor/clap/src/builder/arg.rs @@ -0,0 +1,4647 @@ +// Std +#[cfg(feature = "env")] +use std::env; +#[cfg(feature = "env")] +use std::ffi::OsString; +use std::{ + cmp::{Ord, Ordering}, + fmt::{self, Display, Formatter}, + str, +}; + +// Internal +use super::{ArgFlags, ArgSettings}; +use crate::builder::ArgPredicate; +use crate::builder::IntoResettable; +use crate::builder::OsStr; +use crate::builder::PossibleValue; +use crate::builder::Str; +use crate::builder::StyledStr; +use crate::builder::ValueRange; +use crate::ArgAction; +use crate::Id; +use crate::ValueHint; +use crate::INTERNAL_ERROR_MSG; + +/// The abstract representation of a command line argument. Used to set all the options and +/// relationships that define a valid argument for the program. +/// +/// There are two methods for constructing [`Arg`]s, using the builder pattern and setting options +/// manually, or using a usage string which is far less verbose but has fewer options. You can also +/// use a combination of the two methods to achieve the best of both worlds. +/// +/// - [Basic API][crate::Arg#basic-api] +/// - [Value Handling][crate::Arg#value-handling] +/// - [Help][crate::Arg#help-1] +/// - [Advanced Argument Relations][crate::Arg#advanced-argument-relations] +/// - [Reflection][crate::Arg#reflection] +/// +/// # Examples +/// +/// ```rust +/// # use clap::{Arg, arg, ArgAction}; +/// // Using the traditional builder pattern and setting each option manually +/// let cfg = Arg::new("config") +/// .short('c') +/// .long("config") +/// .action(ArgAction::Set) +/// .value_name("FILE") +/// .help("Provides a config file to myprog"); +/// // Using a usage string (setting a similar argument to the one above) +/// let input = arg!(-i --input <FILE> "Provides an input file to the program"); +/// ``` +#[derive(Default, Clone)] +pub struct Arg { + pub(crate) id: Id, + pub(crate) help: Option<StyledStr>, + pub(crate) long_help: Option<StyledStr>, + pub(crate) action: Option<ArgAction>, + pub(crate) value_parser: Option<super::ValueParser>, + pub(crate) blacklist: Vec<Id>, + pub(crate) settings: ArgFlags, + pub(crate) overrides: Vec<Id>, + pub(crate) groups: Vec<Id>, + pub(crate) requires: Vec<(ArgPredicate, Id)>, + pub(crate) r_ifs: Vec<(Id, OsStr)>, + pub(crate) r_ifs_all: Vec<(Id, OsStr)>, + pub(crate) r_unless: Vec<Id>, + pub(crate) r_unless_all: Vec<Id>, + pub(crate) short: Option<char>, + pub(crate) long: Option<Str>, + pub(crate) aliases: Vec<(Str, bool)>, // (name, visible) + pub(crate) short_aliases: Vec<(char, bool)>, // (name, visible) + pub(crate) disp_ord: Option<usize>, + pub(crate) val_names: Vec<Str>, + pub(crate) num_vals: Option<ValueRange>, + pub(crate) val_delim: Option<char>, + pub(crate) default_vals: Vec<OsStr>, + pub(crate) default_vals_ifs: Vec<(Id, ArgPredicate, Option<OsStr>)>, + pub(crate) default_missing_vals: Vec<OsStr>, + #[cfg(feature = "env")] + pub(crate) env: Option<(OsStr, Option<OsString>)>, + pub(crate) terminator: Option<Str>, + pub(crate) index: Option<usize>, + pub(crate) help_heading: Option<Option<Str>>, + pub(crate) value_hint: Option<ValueHint>, +} + +/// # Basic API +impl Arg { + /// Create a new [`Arg`] with a unique name. + /// + /// The name is used to check whether or not the argument was used at + /// runtime, get values, set relationships with other args, etc.. + /// + /// **NOTE:** In the case of arguments that take values (i.e. [`Arg::action(ArgAction::Set)`]) + /// and positional arguments (i.e. those without a preceding `-` or `--`) the name will also + /// be displayed when the user prints the usage/help information of the program. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// Arg::new("config") + /// # ; + /// ``` + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + pub fn new(id: impl Into<Id>) -> Self { + Arg::default().id(id) + } + + /// Set the identifier used for referencing this argument in the clap API. + /// + /// See [`Arg::new`] for more details. + #[must_use] + pub fn id(mut self, id: impl Into<Id>) -> Self { + self.id = id.into(); + self + } + + /// Sets the short version of the argument without the preceding `-`. + /// + /// By default `V` and `h` are used by the auto-generated `version` and `help` arguments, + /// respectively. You will need to disable the auto-generated flags + /// ([`disable_help_flag`][crate::Command::disable_help_flag], + /// [`disable_version_flag`][crate::Command::disable_version_flag]) and define your own. + /// + /// # Examples + /// + /// When calling `short`, use a single valid UTF-8 character which will allow using the + /// argument via a single hyphen (`-`) such as `-c`: + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("config") + /// .short('c') + /// .action(ArgAction::Set)) + /// .get_matches_from(vec![ + /// "prog", "-c", "file.toml" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("config").map(String::as_str), Some("file.toml")); + /// ``` + /// + /// To use `-h` for your own flag and still have help: + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .disable_help_flag(true) + /// .arg(Arg::new("host") + /// .short('h') + /// .long("host")) + /// .arg(Arg::new("help") + /// .long("help") + /// .global(true) + /// .action(ArgAction::Help)) + /// .get_matches_from(vec![ + /// "prog", "-h", "wikipedia.org" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("host").map(String::as_str), Some("wikipedia.org")); + /// ``` + #[inline] + #[must_use] + pub fn short(mut self, s: impl IntoResettable<char>) -> Self { + if let Some(s) = s.into_resettable().into_option() { + debug_assert!(s != '-', "short option name cannot be `-`"); + self.short = Some(s); + } else { + self.short = None; + } + self + } + + /// Sets the long version of the argument without the preceding `--`. + /// + /// By default `version` and `help` are used by the auto-generated `version` and `help` + /// arguments, respectively. You may use the word `version` or `help` for the long form of your + /// own arguments, in which case `clap` simply will not assign those to the auto-generated + /// `version` or `help` arguments. + /// + /// **NOTE:** Any leading `-` characters will be stripped + /// + /// # Examples + /// + /// To set `long` use a word containing valid UTF-8. If you supply a double leading + /// `--` such as `--config` they will be stripped. Hyphens in the middle of the word, however, + /// will *not* be stripped (i.e. `config-file` is allowed). + /// + /// Setting `long` allows using the argument via a double hyphen (`--`) such as `--config` + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .long("config") + /// .action(ArgAction::Set)) + /// .get_matches_from(vec![ + /// "prog", "--config", "file.toml" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("cfg").map(String::as_str), Some("file.toml")); + /// ``` + #[inline] + #[must_use] + pub fn long(mut self, l: impl IntoResettable<Str>) -> Self { + self.long = l.into_resettable().into_option(); + self + } + + /// Add an alias, which functions as a hidden long flag. + /// + /// This is more efficient, and easier than creating multiple hidden arguments as one only + /// needs to check for the existence of this command, and not all variants. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("test") + /// .long("test") + /// .alias("alias") + /// .action(ArgAction::Set)) + /// .get_matches_from(vec![ + /// "prog", "--alias", "cool" + /// ]); + /// assert_eq!(m.get_one::<String>("test").unwrap(), "cool"); + /// ``` + #[must_use] + pub fn alias(mut self, name: impl IntoResettable<Str>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + self.aliases.push((name, false)); + } else { + self.aliases.clear(); + } + self + } + + /// Add an alias, which functions as a hidden short flag. + /// + /// This is more efficient, and easier than creating multiple hidden arguments as one only + /// needs to check for the existence of this command, and not all variants. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("test") + /// .short('t') + /// .short_alias('e') + /// .action(ArgAction::Set)) + /// .get_matches_from(vec![ + /// "prog", "-e", "cool" + /// ]); + /// assert_eq!(m.get_one::<String>("test").unwrap(), "cool"); + /// ``` + #[must_use] + pub fn short_alias(mut self, name: impl IntoResettable<char>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + debug_assert!(name != '-', "short alias name cannot be `-`"); + self.short_aliases.push((name, false)); + } else { + self.short_aliases.clear(); + } + self + } + + /// Add aliases, which function as hidden long flags. + /// + /// This is more efficient, and easier than creating multiple hidden subcommands as one only + /// needs to check for the existence of this command, and not all variants. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("test") + /// .long("test") + /// .aliases(["do-stuff", "do-tests", "tests"]) + /// .action(ArgAction::SetTrue) + /// .help("the file to add") + /// .required(false)) + /// .get_matches_from(vec![ + /// "prog", "--do-tests" + /// ]); + /// assert_eq!(m.get_flag("test"), true); + /// ``` + #[must_use] + pub fn aliases(mut self, names: impl IntoIterator<Item = impl Into<Str>>) -> Self { + self.aliases + .extend(names.into_iter().map(|x| (x.into(), false))); + self + } + + /// Add aliases, which functions as a hidden short flag. + /// + /// This is more efficient, and easier than creating multiple hidden subcommands as one only + /// needs to check for the existence of this command, and not all variants. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("test") + /// .short('t') + /// .short_aliases(['e', 's']) + /// .action(ArgAction::SetTrue) + /// .help("the file to add") + /// .required(false)) + /// .get_matches_from(vec![ + /// "prog", "-s" + /// ]); + /// assert_eq!(m.get_flag("test"), true); + /// ``` + #[must_use] + pub fn short_aliases(mut self, names: impl IntoIterator<Item = char>) -> Self { + for s in names { + debug_assert!(s != '-', "short alias name cannot be `-`"); + self.short_aliases.push((s, false)); + } + self + } + + /// Add an alias, which functions as a visible long flag. + /// + /// Like [`Arg::alias`], except that they are visible inside the help message. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("test") + /// .visible_alias("something-awesome") + /// .long("test") + /// .action(ArgAction::Set)) + /// .get_matches_from(vec![ + /// "prog", "--something-awesome", "coffee" + /// ]); + /// assert_eq!(m.get_one::<String>("test").unwrap(), "coffee"); + /// ``` + /// [`Command::alias`]: Arg::alias() + #[must_use] + pub fn visible_alias(mut self, name: impl IntoResettable<Str>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + self.aliases.push((name, true)); + } else { + self.aliases.clear(); + } + self + } + + /// Add an alias, which functions as a visible short flag. + /// + /// Like [`Arg::short_alias`], except that they are visible inside the help message. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("test") + /// .long("test") + /// .visible_short_alias('t') + /// .action(ArgAction::Set)) + /// .get_matches_from(vec![ + /// "prog", "-t", "coffee" + /// ]); + /// assert_eq!(m.get_one::<String>("test").unwrap(), "coffee"); + /// ``` + #[must_use] + pub fn visible_short_alias(mut self, name: impl IntoResettable<char>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + debug_assert!(name != '-', "short alias name cannot be `-`"); + self.short_aliases.push((name, true)); + } else { + self.short_aliases.clear(); + } + self + } + + /// Add aliases, which function as visible long flags. + /// + /// Like [`Arg::aliases`], except that they are visible inside the help message. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("test") + /// .long("test") + /// .action(ArgAction::SetTrue) + /// .visible_aliases(["something", "awesome", "cool"])) + /// .get_matches_from(vec![ + /// "prog", "--awesome" + /// ]); + /// assert_eq!(m.get_flag("test"), true); + /// ``` + /// [`Command::aliases`]: Arg::aliases() + #[must_use] + pub fn visible_aliases(mut self, names: impl IntoIterator<Item = impl Into<Str>>) -> Self { + self.aliases + .extend(names.into_iter().map(|n| (n.into(), true))); + self + } + + /// Add aliases, which function as visible short flags. + /// + /// Like [`Arg::short_aliases`], except that they are visible inside the help message. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("test") + /// .long("test") + /// .action(ArgAction::SetTrue) + /// .visible_short_aliases(['t', 'e'])) + /// .get_matches_from(vec![ + /// "prog", "-t" + /// ]); + /// assert_eq!(m.get_flag("test"), true); + /// ``` + #[must_use] + pub fn visible_short_aliases(mut self, names: impl IntoIterator<Item = char>) -> Self { + for n in names { + debug_assert!(n != '-', "short alias name cannot be `-`"); + self.short_aliases.push((n, true)); + } + self + } + + /// Specifies the index of a positional argument **starting at** 1. + /// + /// **NOTE:** The index refers to position according to **other positional argument**. It does + /// not define position in the argument list as a whole. + /// + /// **NOTE:** You can optionally leave off the `index` method, and the index will be + /// assigned in order of evaluation. Utilizing the `index` method allows for setting + /// indexes out of order + /// + /// **NOTE:** This is only meant to be used for positional arguments and shouldn't to be used + /// with [`Arg::short`] or [`Arg::long`]. + /// + /// **NOTE:** When utilized with [`Arg::num_args(1..)`], only the **last** positional argument + /// may be defined as having a variable number of arguments (i.e. with the highest index) + /// + /// # Panics + /// + /// [`Command`] will [`panic!`] if indexes are skipped (such as defining `index(1)` and `index(3)` + /// but not `index(2)`, or a positional argument is defined as multiple and is not the highest + /// index + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// Arg::new("config") + /// .index(1) + /// # ; + /// ``` + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("mode") + /// .index(1)) + /// .arg(Arg::new("debug") + /// .long("debug") + /// .action(ArgAction::SetTrue)) + /// .get_matches_from(vec![ + /// "prog", "--debug", "fast" + /// ]); + /// + /// assert!(m.contains_id("mode")); + /// assert_eq!(m.get_one::<String>("mode").unwrap(), "fast"); // notice index(1) means "first positional" + /// // *not* first argument + /// ``` + /// [`Arg::short`]: Arg::short() + /// [`Arg::long`]: Arg::long() + /// [`Arg::num_args(true)`]: Arg::num_args() + /// [`Command`]: crate::Command + #[inline] + #[must_use] + pub fn index(mut self, idx: impl IntoResettable<usize>) -> Self { + self.index = idx.into_resettable().into_option(); + self + } + + /// This is a "VarArg" and everything that follows should be captured by it, as if the user had + /// used a `--`. + /// + /// **NOTE:** To start the trailing "VarArg" on unknown flags (and not just a positional + /// value), set [`allow_hyphen_values`][Arg::allow_hyphen_values]. Either way, users still + /// have the option to explicitly escape ambiguous arguments with `--`. + /// + /// **NOTE:** [`Arg::value_delimiter`] still applies if set. + /// + /// **NOTE:** Setting this requires [`Arg::num_args(..)`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, arg}; + /// let m = Command::new("myprog") + /// .arg(arg!(<cmd> ... "commands to run").trailing_var_arg(true)) + /// .get_matches_from(vec!["myprog", "arg1", "-r", "val1"]); + /// + /// let trail: Vec<_> = m.get_many::<String>("cmd").unwrap().collect(); + /// assert_eq!(trail, ["arg1", "-r", "val1"]); + /// ``` + /// [`Arg::num_args(..)`]: crate::Arg::num_args() + pub fn trailing_var_arg(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::TrailingVarArg) + } else { + self.unset_setting(ArgSettings::TrailingVarArg) + } + } + + /// This arg is the last, or final, positional argument (i.e. has the highest + /// index) and is *only* able to be accessed via the `--` syntax (i.e. `$ prog args -- + /// last_arg`). + /// + /// Even, if no other arguments are left to parse, if the user omits the `--` syntax + /// they will receive an [`UnknownArgument`] error. Setting an argument to `.last(true)` also + /// allows one to access this arg early using the `--` syntax. Accessing an arg early, even with + /// the `--` syntax is otherwise not possible. + /// + /// **NOTE:** This will change the usage string to look like `$ prog [OPTIONS] [-- <ARG>]` if + /// `ARG` is marked as `.last(true)`. + /// + /// **NOTE:** This setting will imply [`crate::Command::dont_collapse_args_in_usage`] because failing + /// to set this can make the usage string very confusing. + /// + /// **NOTE**: This setting only applies to positional arguments, and has no effect on OPTIONS + /// + /// **NOTE:** Setting this requires [taking values][Arg::num_args] + /// + /// **CAUTION:** Using this setting *and* having child subcommands is not + /// recommended with the exception of *also* using + /// [`crate::Command::args_conflicts_with_subcommands`] + /// (or [`crate::Command::subcommand_negates_reqs`] if the argument marked `Last` is also + /// marked [`Arg::required`]) + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Arg, ArgAction}; + /// Arg::new("args") + /// .action(ArgAction::Set) + /// .last(true) + /// # ; + /// ``` + /// + /// Setting `last` ensures the arg has the highest [index] of all positional args + /// and requires that the `--` syntax be used to access it early. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("first")) + /// .arg(Arg::new("second")) + /// .arg(Arg::new("third") + /// .action(ArgAction::Set) + /// .last(true)) + /// .try_get_matches_from(vec![ + /// "prog", "one", "--", "three" + /// ]); + /// + /// assert!(res.is_ok()); + /// let m = res.unwrap(); + /// assert_eq!(m.get_one::<String>("third").unwrap(), "three"); + /// assert_eq!(m.get_one::<String>("second"), None); + /// ``` + /// + /// Even if the positional argument marked `Last` is the only argument left to parse, + /// failing to use the `--` syntax results in an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("first")) + /// .arg(Arg::new("second")) + /// .arg(Arg::new("third") + /// .action(ArgAction::Set) + /// .last(true)) + /// .try_get_matches_from(vec![ + /// "prog", "one", "two", "three" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); + /// ``` + /// [index]: Arg::index() + /// [`UnknownArgument`]: crate::error::ErrorKind::UnknownArgument + #[inline] + #[must_use] + pub fn last(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::Last) + } else { + self.unset_setting(ArgSettings::Last) + } + } + + /// Specifies that the argument must be present. + /// + /// Required by default means it is required, when no other conflicting rules or overrides have + /// been evaluated. Conflicting rules take precedence over being required. + /// + /// **Pro tip:** Flags (i.e. not positional, or arguments that take values) shouldn't be + /// required by default. This is because if a flag were to be required, it should simply be + /// implied. No additional information is required from user. Flags by their very nature are + /// simply boolean on/off switches. The only time a user *should* be required to use a flag + /// is if the operation is destructive in nature, and the user is essentially proving to you, + /// "Yes, I know what I'm doing." + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .required(true) + /// # ; + /// ``` + /// + /// Setting required requires that the argument be used at runtime. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required(true) + /// .action(ArgAction::Set) + /// .long("config")) + /// .try_get_matches_from(vec![ + /// "prog", "--config", "file.conf", + /// ]); + /// + /// assert!(res.is_ok()); + /// ``` + /// + /// Setting required and then *not* supplying that argument at runtime is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required(true) + /// .action(ArgAction::Set) + /// .long("config")) + /// .try_get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + #[inline] + #[must_use] + pub fn required(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::Required) + } else { + self.unset_setting(ArgSettings::Required) + } + } + + /// Sets an argument that is required when this one is present + /// + /// i.e. when using this argument, the following argument *must* be present. + /// + /// **NOTE:** [Conflicting] rules and [override] rules take precedence over being required + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .requires("input") + /// # ; + /// ``` + /// + /// Setting [`Arg::requires(name)`] requires that the argument be used at runtime if the + /// defining argument is used. If the defining argument isn't used, the other argument isn't + /// required + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .requires("input") + /// .long("config")) + /// .arg(Arg::new("input")) + /// .try_get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert!(res.is_ok()); // We didn't use cfg, so input wasn't required + /// ``` + /// + /// Setting [`Arg::requires(name)`] and *not* supplying that argument is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .requires("input") + /// .long("config")) + /// .arg(Arg::new("input")) + /// .try_get_matches_from(vec![ + /// "prog", "--config", "file.conf" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [`Arg::requires(name)`]: Arg::requires() + /// [Conflicting]: Arg::conflicts_with() + /// [override]: Arg::overrides_with() + #[must_use] + pub fn requires(mut self, arg_id: impl IntoResettable<Id>) -> Self { + if let Some(arg_id) = arg_id.into_resettable().into_option() { + self.requires.push((ArgPredicate::IsPresent, arg_id)); + } else { + self.requires.clear(); + } + self + } + + /// This argument must be passed alone; it conflicts with all other arguments. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .exclusive(true) + /// # ; + /// ``` + /// + /// Setting an exclusive argument and having any other arguments present at runtime + /// is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("exclusive") + /// .action(ArgAction::Set) + /// .exclusive(true) + /// .long("exclusive")) + /// .arg(Arg::new("debug") + /// .long("debug")) + /// .arg(Arg::new("input")) + /// .try_get_matches_from(vec![ + /// "prog", "--exclusive", "file.conf", "file.txt" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::ArgumentConflict); + /// ``` + #[inline] + #[must_use] + pub fn exclusive(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::Exclusive) + } else { + self.unset_setting(ArgSettings::Exclusive) + } + } + + /// Specifies that an argument can be matched to all child [`Subcommand`]s. + /// + /// **NOTE:** Global arguments *only* propagate down, **not** up (to parent commands), however + /// their values once a user uses them will be propagated back up to parents. In effect, this + /// means one should *define* all global arguments at the top level, however it doesn't matter + /// where the user *uses* the global argument. + /// + /// # Examples + /// + /// Assume an application with two subcommands, and you'd like to define a + /// `--verbose` flag that can be called on any of the subcommands and parent, but you don't + /// want to clutter the source with three duplicate [`Arg`] definitions. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("verb") + /// .long("verbose") + /// .short('v') + /// .action(ArgAction::SetTrue) + /// .global(true)) + /// .subcommand(Command::new("test")) + /// .subcommand(Command::new("do-stuff")) + /// .get_matches_from(vec![ + /// "prog", "do-stuff", "--verbose" + /// ]); + /// + /// assert_eq!(m.subcommand_name(), Some("do-stuff")); + /// let sub_m = m.subcommand_matches("do-stuff").unwrap(); + /// assert_eq!(sub_m.get_flag("verb"), true); + /// ``` + /// + /// [`Subcommand`]: crate::Subcommand + #[inline] + #[must_use] + pub fn global(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::Global) + } else { + self.unset_setting(ArgSettings::Global) + } + } + + #[inline] + pub(crate) fn is_set(&self, s: ArgSettings) -> bool { + self.settings.is_set(s) + } + + #[inline] + #[must_use] + pub(crate) fn setting<F>(mut self, setting: F) -> Self + where + F: Into<ArgFlags>, + { + self.settings.insert(setting.into()); + self + } + + #[inline] + #[must_use] + pub(crate) fn unset_setting<F>(mut self, setting: F) -> Self + where + F: Into<ArgFlags>, + { + self.settings.remove(setting.into()); + self + } +} + +/// # Value Handling +impl Arg { + /// Specify how to react to an argument when parsing it. + /// + /// [ArgAction][crate::ArgAction] controls things like + /// - Overwriting previous values with new ones + /// - Appending new values to all previous ones + /// - Counting how many times a flag occurs + /// + /// The default action is `ArgAction::Set` + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// # use clap::Arg; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("flag") + /// .long("flag") + /// .action(clap::ArgAction::Append) + /// ); + /// + /// let matches = cmd.try_get_matches_from(["mycmd", "--flag", "value"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_many::<String>("flag").unwrap_or_default().map(|v| v.as_str()).collect::<Vec<_>>(), + /// vec!["value"] + /// ); + /// ``` + #[inline] + #[must_use] + pub fn action(mut self, action: impl IntoResettable<ArgAction>) -> Self { + self.action = action.into_resettable().into_option(); + self + } + + /// Specify the typed behavior of the argument. + /// + /// This allows parsing and validating a value before storing it into + /// [`ArgMatches`][crate::ArgMatches] as the given type. + /// + /// Possible value parsers include: + /// - [`value_parser!(T)`][crate::value_parser!] for auto-selecting a value parser for a given type + /// - Or [range expressions like `0..=1`][std::ops::RangeBounds] as a shorthand for [`RangedI64ValueParser`][crate::builder::RangedI64ValueParser] + /// - `Fn(&str) -> Result<T, E>` + /// - `[&str]` and [`PossibleValuesParser`][crate::builder::PossibleValuesParser] for static enumerated values + /// - [`BoolishValueParser`][crate::builder::BoolishValueParser], and [`FalseyValueParser`][crate::builder::FalseyValueParser] for alternative `bool` implementations + /// - [`NonEmptyStringValueParser`][crate::builder::NonEmptyStringValueParser] for basic validation for strings + /// - or any other [`TypedValueParser`][crate::builder::TypedValueParser] implementation + /// + /// The default value is [`ValueParser::string`][crate::builder::ValueParser::string]. + /// + /// ```rust + /// # use clap::ArgAction; + /// let mut cmd = clap::Command::new("raw") + /// .arg( + /// clap::Arg::new("color") + /// .long("color") + /// .value_parser(["always", "auto", "never"]) + /// .default_value("auto") + /// ) + /// .arg( + /// clap::Arg::new("hostname") + /// .long("hostname") + /// .value_parser(clap::builder::NonEmptyStringValueParser::new()) + /// .action(ArgAction::Set) + /// .required(true) + /// ) + /// .arg( + /// clap::Arg::new("port") + /// .long("port") + /// .value_parser(clap::value_parser!(u16).range(3000..)) + /// .action(ArgAction::Set) + /// .required(true) + /// ); + /// + /// let m = cmd.try_get_matches_from_mut( + /// ["cmd", "--hostname", "rust-lang.org", "--port", "3001"] + /// ).unwrap(); + /// + /// let color: &String = m.get_one("color") + /// .expect("default"); + /// assert_eq!(color, "auto"); + /// + /// let hostname: &String = m.get_one("hostname") + /// .expect("required"); + /// assert_eq!(hostname, "rust-lang.org"); + /// + /// let port: u16 = *m.get_one("port") + /// .expect("required"); + /// assert_eq!(port, 3001); + /// ``` + pub fn value_parser(mut self, parser: impl IntoResettable<super::ValueParser>) -> Self { + self.value_parser = parser.into_resettable().into_option(); + self + } + + /// Specifies the number of arguments parsed per occurrence + /// + /// For example, if you had a `-f <file>` argument where you wanted exactly 3 'files' you would + /// set `.num_args(3)`, and this argument wouldn't be satisfied unless the user + /// provided 3 and only 3 values. + /// + /// Users may specify values for arguments in any of the following methods + /// + /// - Using a space such as `-o value` or `--option value` + /// - Using an equals and no space such as `-o=value` or `--option=value` + /// - Use a short and no space such as `-ovalue` + /// + /// **WARNING:** + /// + /// Setting a variable number of values (e.g. `1..=10`) for an argument without + /// other details can be dangerous in some circumstances. Because multiple values are + /// allowed, `--option val1 val2 val3` is perfectly valid. Be careful when designing a CLI + /// where **positional arguments** or **subcommands** are *also* expected as `clap` will continue + /// parsing *values* until one of the following happens: + /// + /// - It reaches the maximum number of values + /// - It reaches a specific number of values + /// - It finds another flag or option (i.e. something that starts with a `-`) + /// - It reaches the [`Arg::value_terminator`] if set + /// + /// Alternatively, + /// - Use a delimiter between values with [Arg::value_delimiter] + /// - Require a flag occurrence per value with [`ArgAction::Append`] + /// - Require positional arguments to appear after `--` with [`Arg::last`] + /// + /// # Examples + /// + /// Option: + /// ```rust + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("mode") + /// .long("mode") + /// .num_args(1)) + /// .get_matches_from(vec![ + /// "prog", "--mode", "fast" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("mode").unwrap(), "fast"); + /// ``` + /// + /// Flag/option hybrid (see also [default_missing_value][Arg::default_missing_value]) + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let cmd = Command::new("prog") + /// .arg(Arg::new("mode") + /// .long("mode") + /// .default_missing_value("slow") + /// .default_value("plaid") + /// .num_args(0..=1)); + /// + /// let m = cmd.clone() + /// .get_matches_from(vec![ + /// "prog", "--mode", "fast" + /// ]); + /// assert_eq!(m.get_one::<String>("mode").unwrap(), "fast"); + /// + /// let m = cmd.clone() + /// .get_matches_from(vec![ + /// "prog", "--mode", + /// ]); + /// assert_eq!(m.get_one::<String>("mode").unwrap(), "slow"); + /// + /// let m = cmd.clone() + /// .get_matches_from(vec![ + /// "prog", + /// ]); + /// assert_eq!(m.get_one::<String>("mode").unwrap(), "plaid"); + /// ``` + /// + /// Tuples + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let cmd = Command::new("prog") + /// .arg(Arg::new("file") + /// .action(ArgAction::Set) + /// .num_args(2) + /// .short('F')); + /// + /// let m = cmd.clone() + /// .get_matches_from(vec![ + /// "prog", "-F", "in-file", "out-file" + /// ]); + /// assert_eq!( + /// m.get_many::<String>("file").unwrap_or_default().map(|v| v.as_str()).collect::<Vec<_>>(), + /// vec!["in-file", "out-file"] + /// ); + /// + /// let res = cmd.clone() + /// .try_get_matches_from(vec![ + /// "prog", "-F", "file1" + /// ]); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::WrongNumberOfValues); + /// ``` + /// + /// A common mistake is to define an option which allows multiple values and a positional + /// argument. + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let cmd = Command::new("prog") + /// .arg(Arg::new("file") + /// .action(ArgAction::Set) + /// .num_args(0..) + /// .short('F')) + /// .arg(Arg::new("word")); + /// + /// let m = cmd.clone().get_matches_from(vec![ + /// "prog", "-F", "file1", "file2", "file3", "word" + /// ]); + /// let files: Vec<_> = m.get_many::<String>("file").unwrap().collect(); + /// assert_eq!(files, ["file1", "file2", "file3", "word"]); // wait...what?! + /// assert!(!m.contains_id("word")); // but we clearly used word! + /// + /// // but this works + /// let m = cmd.clone().get_matches_from(vec![ + /// "prog", "word", "-F", "file1", "file2", "file3", + /// ]); + /// let files: Vec<_> = m.get_many::<String>("file").unwrap().collect(); + /// assert_eq!(files, ["file1", "file2", "file3"]); + /// assert_eq!(m.get_one::<String>("word").unwrap(), "word"); + /// ``` + /// The problem is `clap` doesn't know when to stop parsing values for "file". + /// + /// A solution for the example above is to limit how many values with a maximum, or specific + /// number, or to say [`ArgAction::Append`] is ok, but multiple values are not. + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("file") + /// .action(ArgAction::Append) + /// .short('F')) + /// .arg(Arg::new("word")) + /// .get_matches_from(vec![ + /// "prog", "-F", "file1", "-F", "file2", "-F", "file3", "word" + /// ]); + /// + /// let files: Vec<_> = m.get_many::<String>("file").unwrap().collect(); + /// assert_eq!(files, ["file1", "file2", "file3"]); + /// assert_eq!(m.get_one::<String>("word").unwrap(), "word"); + /// ``` + #[inline] + #[must_use] + pub fn num_args(mut self, qty: impl IntoResettable<ValueRange>) -> Self { + self.num_vals = qty.into_resettable().into_option(); + self + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::num_args`") + )] + pub fn number_of_values(self, qty: usize) -> Self { + self.num_args(qty) + } + + /// Placeholder for the argument's value in the help message / usage. + /// + /// This name is cosmetic only; the name is **not** used to access arguments. + /// This setting can be very helpful when describing the type of input the user should be + /// using, such as `FILE`, `INTERFACE`, etc. Although not required, it's somewhat convention to + /// use all capital letters for the value name. + /// + /// **NOTE:** implicitly sets [`Arg::action(ArgAction::Set)`] + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// Arg::new("cfg") + /// .long("config") + /// .value_name("FILE") + /// # ; + /// ``` + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("config") + /// .long("config") + /// .value_name("FILE") + /// .help("Some help text")) + /// .get_matches_from(vec![ + /// "prog", "--help" + /// ]); + /// ``` + /// Running the above program produces the following output + /// + /// ```text + /// valnames + /// + /// Usage: valnames [OPTIONS] + /// + /// Options: + /// --config <FILE> Some help text + /// -h, --help Print help information + /// -V, --version Print version information + /// ``` + /// [positional]: Arg::index() + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + #[inline] + #[must_use] + pub fn value_name(mut self, name: impl IntoResettable<Str>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + self.value_names([name]) + } else { + self.val_names.clear(); + self + } + } + + /// Placeholders for the argument's values in the help message / usage. + /// + /// These names are cosmetic only, used for help and usage strings only. The names are **not** + /// used to access arguments. The values of the arguments are accessed in numeric order (i.e. + /// if you specify two names `one` and `two` `one` will be the first matched value, `two` will + /// be the second). + /// + /// This setting can be very helpful when describing the type of input the user should be + /// using, such as `FILE`, `INTERFACE`, etc. Although not required, it's somewhat convention to + /// use all capital letters for the value name. + /// + /// **Pro Tip:** It may help to use [`Arg::next_line_help(true)`] if there are long, or + /// multiple value names in order to not throw off the help text alignment of all options. + /// + /// **NOTE:** implicitly sets [`Arg::action(ArgAction::Set)`] and [`Arg::num_args(1..)`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// Arg::new("speed") + /// .short('s') + /// .value_names(["fast", "slow"]); + /// ``` + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("io") + /// .long("io-files") + /// .value_names(["INFILE", "OUTFILE"])) + /// .get_matches_from(vec![ + /// "prog", "--help" + /// ]); + /// ``` + /// + /// Running the above program produces the following output + /// + /// ```text + /// valnames + /// + /// Usage: valnames [OPTIONS] + /// + /// Options: + /// -h, --help Print help information + /// --io-files <INFILE> <OUTFILE> Some help text + /// -V, --version Print version information + /// ``` + /// [`Arg::next_line_help(true)`]: Arg::next_line_help() + /// [`Arg::num_args`]: Arg::num_args() + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + /// [`Arg::num_args(1..)`]: Arg::num_args() + #[must_use] + pub fn value_names(mut self, names: impl IntoIterator<Item = impl Into<Str>>) -> Self { + self.val_names = names.into_iter().map(|s| s.into()).collect(); + self + } + + /// Provide the shell a hint about how to complete this argument. + /// + /// See [`ValueHint`][crate::ValueHint] for more information. + /// + /// **NOTE:** implicitly sets [`Arg::action(ArgAction::Set)`]. + /// + /// For example, to take a username as argument: + /// + /// ``` + /// # use clap::{Arg, ValueHint}; + /// Arg::new("user") + /// .short('u') + /// .long("user") + /// .value_hint(ValueHint::Username); + /// ``` + /// + /// To take a full command line and its arguments (for example, when writing a command wrapper): + /// + /// ``` + /// # use clap::{Command, Arg, ValueHint, ArgAction}; + /// Command::new("prog") + /// .trailing_var_arg(true) + /// .arg( + /// Arg::new("command") + /// .action(ArgAction::Set) + /// .num_args(1..) + /// .value_hint(ValueHint::CommandWithArguments) + /// ); + /// ``` + #[must_use] + pub fn value_hint(mut self, value_hint: impl IntoResettable<ValueHint>) -> Self { + self.value_hint = value_hint.into_resettable().into_option(); + self + } + + /// Match values against [`PossibleValuesParser`][crate::builder::PossibleValuesParser] without matching case. + /// + /// When other arguments are conditionally required based on the + /// value of a case-insensitive argument, the equality check done + /// by [`Arg::required_if_eq`], [`Arg::required_if_eq_any`], or + /// [`Arg::required_if_eq_all`] is case-insensitive. + /// + /// + /// **NOTE:** Setting this requires [taking values][Arg::num_args] + /// + /// **NOTE:** To do unicode case folding, enable the `unicode` feature flag. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("pv") + /// .arg(Arg::new("option") + /// .long("option") + /// .action(ArgAction::Set) + /// .ignore_case(true) + /// .value_parser(["test123"])) + /// .get_matches_from(vec![ + /// "pv", "--option", "TeSt123", + /// ]); + /// + /// assert!(m.get_one::<String>("option").unwrap().eq_ignore_ascii_case("test123")); + /// ``` + /// + /// This setting also works when multiple values can be defined: + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("pv") + /// .arg(Arg::new("option") + /// .short('o') + /// .long("option") + /// .action(ArgAction::Set) + /// .ignore_case(true) + /// .num_args(1..) + /// .value_parser(["test123", "test321"])) + /// .get_matches_from(vec![ + /// "pv", "--option", "TeSt123", "teST123", "tESt321" + /// ]); + /// + /// let matched_vals = m.get_many::<String>("option").unwrap().collect::<Vec<_>>(); + /// assert_eq!(&*matched_vals, &["TeSt123", "teST123", "tESt321"]); + /// ``` + #[inline] + #[must_use] + pub fn ignore_case(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::IgnoreCase) + } else { + self.unset_setting(ArgSettings::IgnoreCase) + } + } + + /// Allows values which start with a leading hyphen (`-`) + /// + /// To limit values to just numbers, see + /// [`allow_negative_numbers`][Arg::allow_negative_numbers]. + /// + /// See also [`trailing_var_arg`][Arg::trailing_var_arg]. + /// + /// **NOTE:** Setting this requires [taking values][Arg::num_args] + /// + /// **WARNING:** Prior arguments with `allow_hyphen_values(true)` get precedence over known + /// flags but known flags get precedence over the next possible positional argument with + /// `allow_hyphen_values(true)`. When combined with [`Arg::num_args(..)`], + /// [`Arg::value_terminator`] is one way to ensure processing stops. + /// + /// **WARNING**: Take caution when using this setting combined with another argument using + /// [`Arg::num_args`], as this becomes ambiguous `$ prog --arg -- -- val`. All + /// three `--, --, val` will be values when the user may have thought the second `--` would + /// constitute the normal, "Only positional args follow" idiom. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("pat") + /// .action(ArgAction::Set) + /// .allow_hyphen_values(true) + /// .long("pattern")) + /// .get_matches_from(vec![ + /// "prog", "--pattern", "-file" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("pat").unwrap(), "-file"); + /// ``` + /// + /// Not setting `Arg::allow_hyphen_values(true)` and supplying a value which starts with a + /// hyphen is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("pat") + /// .action(ArgAction::Set) + /// .long("pattern")) + /// .try_get_matches_from(vec![ + /// "prog", "--pattern", "-file" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); + /// ``` + /// [`Arg::num_args(1)`]: Arg::num_args() + #[inline] + #[must_use] + pub fn allow_hyphen_values(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::AllowHyphenValues) + } else { + self.unset_setting(ArgSettings::AllowHyphenValues) + } + } + + /// Allows negative numbers to pass as values. + /// + /// This is similar to [`Arg::allow_hyphen_values`] except that it only allows numbers, + /// all other undefined leading hyphens will fail to parse. + /// + /// **NOTE:** Setting this requires [taking values][Arg::num_args] + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// let res = Command::new("myprog") + /// .arg(Arg::new("num").allow_negative_numbers(true)) + /// .try_get_matches_from(vec![ + /// "myprog", "-20" + /// ]); + /// assert!(res.is_ok()); + /// let m = res.unwrap(); + /// assert_eq!(m.get_one::<String>("num").unwrap(), "-20"); + /// ``` + #[inline] + pub fn allow_negative_numbers(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::AllowNegativeNumbers) + } else { + self.unset_setting(ArgSettings::AllowNegativeNumbers) + } + } + + /// Requires that options use the `--option=val` syntax + /// + /// i.e. an equals between the option and associated value. + /// + /// **NOTE:** Setting this requires [taking values][Arg::num_args] + /// + /// # Examples + /// + /// Setting `require_equals` requires that the option have an equals sign between + /// it and the associated value. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .require_equals(true) + /// .long("config")) + /// .try_get_matches_from(vec![ + /// "prog", "--config=file.conf" + /// ]); + /// + /// assert!(res.is_ok()); + /// ``` + /// + /// Setting `require_equals` and *not* supplying the equals will cause an + /// error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .require_equals(true) + /// .long("config")) + /// .try_get_matches_from(vec![ + /// "prog", "--config", "file.conf" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::NoEquals); + /// ``` + #[inline] + #[must_use] + pub fn require_equals(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::RequireEquals) + } else { + self.unset_setting(ArgSettings::RequireEquals) + } + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::value_delimiter`") + )] + pub fn use_value_delimiter(mut self, yes: bool) -> Self { + if yes { + self.val_delim.get_or_insert(','); + } else { + self.val_delim = None; + } + self + } + + /// Allow grouping of multiple values via a delimiter. + /// + /// i.e. should `--option=val1,val2,val3` be parsed as three values (`val1`, `val2`, + /// and `val3`) or as a single value (`val1,val2,val3`). Defaults to using `,` (comma) as the + /// value delimiter for all arguments that accept values (options and positional arguments) + /// + /// **NOTE:** implicitly sets [`Arg::action(ArgAction::Set)`] + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("config") + /// .short('c') + /// .long("config") + /// .value_delimiter(',')) + /// .get_matches_from(vec![ + /// "prog", "--config=val1,val2,val3" + /// ]); + /// + /// assert_eq!(m.get_many::<String>("config").unwrap().collect::<Vec<_>>(), ["val1", "val2", "val3"]) + /// ``` + /// [`Arg::value_delimiter(',')`]: Arg::value_delimiter() + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + #[inline] + #[must_use] + pub fn value_delimiter(mut self, d: impl IntoResettable<char>) -> Self { + self.val_delim = d.into_resettable().into_option(); + self + } + + /// Sentinel to **stop** parsing multiple values of a given argument. + /// + /// By default when + /// one sets [`num_args(1..)`] on an argument, clap will continue parsing values for that + /// argument until it reaches another valid argument, or one of the other more specific settings + /// for multiple values is used (such as [`num_args`]). + /// + /// **NOTE:** This setting only applies to [options] and [positional arguments] + /// + /// **NOTE:** When the terminator is passed in on the command line, it is **not** stored as one + /// of the values + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// Arg::new("vals") + /// .action(ArgAction::Set) + /// .num_args(1..) + /// .value_terminator(";") + /// # ; + /// ``` + /// + /// The following example uses two arguments, a sequence of commands, and the location in which + /// to perform them + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("cmds") + /// .action(ArgAction::Set) + /// .num_args(1..) + /// .allow_hyphen_values(true) + /// .value_terminator(";")) + /// .arg(Arg::new("location")) + /// .get_matches_from(vec![ + /// "prog", "find", "-type", "f", "-name", "special", ";", "/home/clap" + /// ]); + /// let cmds: Vec<_> = m.get_many::<String>("cmds").unwrap().collect(); + /// assert_eq!(&cmds, &["find", "-type", "f", "-name", "special"]); + /// assert_eq!(m.get_one::<String>("location").unwrap(), "/home/clap"); + /// ``` + /// [options]: Arg::action + /// [positional arguments]: Arg::index() + /// [`num_args(1..)`]: Arg::num_args() + /// [`num_args`]: Arg::num_args() + #[inline] + #[must_use] + pub fn value_terminator(mut self, term: impl IntoResettable<Str>) -> Self { + self.terminator = term.into_resettable().into_option(); + self + } + + /// Consume all following arguments. + /// + /// Do not be parse them individually, but rather pass them in entirety. + /// + /// It is worth noting that setting this requires all values to come after a `--` to indicate + /// they should all be captured. For example: + /// + /// ```text + /// --foo something -- -v -v -v -b -b -b --baz -q -u -x + /// ``` + /// + /// Will result in everything after `--` to be considered one raw argument. This behavior + /// may not be exactly what you are expecting and using [`crate::Command::trailing_var_arg`] + /// may be more appropriate. + /// + /// **NOTE:** Implicitly sets [`Arg::action(ArgAction::Set)`] [`Arg::num_args(1..)`], + /// [`Arg::allow_hyphen_values(true)`], and [`Arg::last(true)`] when set to `true`. + /// + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + /// [`Arg::num_args(1..)`]: Arg::num_args() + /// [`Arg::allow_hyphen_values(true)`]: Arg::allow_hyphen_values() + /// [`Arg::last(true)`]: Arg::last() + #[inline] + #[must_use] + pub fn raw(mut self, yes: bool) -> Self { + if yes { + self.num_vals.get_or_insert_with(|| (1..).into()); + } + self.allow_hyphen_values(yes).last(yes) + } + + /// Value for the argument when not present. + /// + /// **NOTE:** If the user *does not* use this argument at runtime [`ArgMatches::contains_id`] will + /// still return `true`. If you wish to determine whether the argument was used at runtime or + /// not, consider [`ArgMatches::value_source`][crate::ArgMatches::value_source]. + /// + /// **NOTE:** This setting is perfectly compatible with [`Arg::default_value_if`] but slightly + /// different. `Arg::default_value` *only* takes effect when the user has not provided this arg + /// at runtime. `Arg::default_value_if` however only takes effect when the user has not provided + /// a value at runtime **and** these other conditions are met as well. If you have set + /// `Arg::default_value` and `Arg::default_value_if`, and the user **did not** provide this arg + /// at runtime, nor were the conditions met for `Arg::default_value_if`, the `Arg::default_value` + /// will be applied. + /// + /// **NOTE:** This implicitly sets [`Arg::action(ArgAction::Set)`]. + /// + /// # Examples + /// + /// First we use the default value without providing any value at runtime. + /// + /// ```rust + /// # use clap::{Command, Arg, parser::ValueSource}; + /// let m = Command::new("prog") + /// .arg(Arg::new("opt") + /// .long("myopt") + /// .default_value("myval")) + /// .get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("opt").unwrap(), "myval"); + /// assert!(m.contains_id("opt")); + /// assert_eq!(m.value_source("opt"), Some(ValueSource::DefaultValue)); + /// ``` + /// + /// Next we provide a value at runtime to override the default. + /// + /// ```rust + /// # use clap::{Command, Arg, parser::ValueSource}; + /// let m = Command::new("prog") + /// .arg(Arg::new("opt") + /// .long("myopt") + /// .default_value("myval")) + /// .get_matches_from(vec![ + /// "prog", "--myopt=non_default" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("opt").unwrap(), "non_default"); + /// assert!(m.contains_id("opt")); + /// assert_eq!(m.value_source("opt"), Some(ValueSource::CommandLine)); + /// ``` + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + /// [`ArgMatches::contains_id`]: crate::ArgMatches::contains_id() + /// [`Arg::default_value_if`]: Arg::default_value_if() + #[inline] + #[must_use] + pub fn default_value(mut self, val: impl IntoResettable<OsStr>) -> Self { + if let Some(val) = val.into_resettable().into_option() { + self.default_values([val]) + } else { + self.default_vals.clear(); + self + } + } + + #[inline] + #[must_use] + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::default_value`") + )] + pub fn default_value_os(self, val: impl Into<OsStr>) -> Self { + self.default_values([val]) + } + + /// Value for the argument when not present. + /// + /// See [`Arg::default_value`]. + /// + /// [`Arg::default_value`]: Arg::default_value() + #[inline] + #[must_use] + pub fn default_values(mut self, vals: impl IntoIterator<Item = impl Into<OsStr>>) -> Self { + self.default_vals = vals.into_iter().map(|s| s.into()).collect(); + self + } + + #[inline] + #[must_use] + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::default_values`") + )] + pub fn default_values_os(self, vals: impl IntoIterator<Item = impl Into<OsStr>>) -> Self { + self.default_values(vals) + } + + /// Value for the argument when the flag is present but no value is specified. + /// + /// This configuration option is often used to give the user a shortcut and allow them to + /// efficiently specify an option argument without requiring an explicitly value. The `--color` + /// argument is a common example. By, supplying an default, such as `default_missing_value("always")`, + /// the user can quickly just add `--color` to the command line to produce the desired color output. + /// + /// **NOTE:** using this configuration option requires the use of the + /// [`.num_args(0..N)`][Arg::num_args] and the + /// [`.require_equals(true)`][Arg::require_equals] configuration option. These are required in + /// order to unambiguously determine what, if any, value was supplied for the argument. + /// + /// # Examples + /// + /// For POSIX style `--color`: + /// ```rust + /// # use clap::{Command, Arg, parser::ValueSource}; + /// fn cli() -> Command { + /// Command::new("prog") + /// .arg(Arg::new("color").long("color") + /// .value_name("WHEN") + /// .value_parser(["always", "auto", "never"]) + /// .default_value("auto") + /// .num_args(0..=1) + /// .require_equals(true) + /// .default_missing_value("always") + /// .help("Specify WHEN to colorize output.") + /// ) + /// } + /// + /// // first, we'll provide no arguments + /// let m = cli().get_matches_from(vec![ + /// "prog" + /// ]); + /// assert_eq!(m.get_one::<String>("color").unwrap(), "auto"); + /// assert_eq!(m.value_source("color"), Some(ValueSource::DefaultValue)); + /// + /// // next, we'll provide a runtime value to override the default (as usually done). + /// let m = cli().get_matches_from(vec![ + /// "prog", "--color=never" + /// ]); + /// assert_eq!(m.get_one::<String>("color").unwrap(), "never"); + /// assert_eq!(m.value_source("color"), Some(ValueSource::CommandLine)); + /// + /// // finally, we will use the shortcut and only provide the argument without a value. + /// let m = cli().get_matches_from(vec![ + /// "prog", "--color" + /// ]); + /// assert_eq!(m.get_one::<String>("color").unwrap(), "always"); + /// assert_eq!(m.value_source("color"), Some(ValueSource::CommandLine)); + /// ``` + /// + /// For bool literals: + /// ```rust + /// # use clap::{Command, Arg, parser::ValueSource, value_parser}; + /// fn cli() -> Command { + /// Command::new("prog") + /// .arg(Arg::new("create").long("create") + /// .value_name("BOOL") + /// .value_parser(value_parser!(bool)) + /// .num_args(0..=1) + /// .require_equals(true) + /// .default_missing_value("true") + /// ) + /// } + /// + /// // first, we'll provide no arguments + /// let m = cli().get_matches_from(vec![ + /// "prog" + /// ]); + /// assert_eq!(m.get_one::<bool>("create").copied(), None); + /// + /// // next, we'll provide a runtime value to override the default (as usually done). + /// let m = cli().get_matches_from(vec![ + /// "prog", "--create=false" + /// ]); + /// assert_eq!(m.get_one::<bool>("create").copied(), Some(false)); + /// assert_eq!(m.value_source("create"), Some(ValueSource::CommandLine)); + /// + /// // finally, we will use the shortcut and only provide the argument without a value. + /// let m = cli().get_matches_from(vec![ + /// "prog", "--create" + /// ]); + /// assert_eq!(m.get_one::<bool>("create").copied(), Some(true)); + /// assert_eq!(m.value_source("create"), Some(ValueSource::CommandLine)); + /// ``` + /// + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + /// [`Arg::default_value`]: Arg::default_value() + #[inline] + #[must_use] + pub fn default_missing_value(mut self, val: impl IntoResettable<OsStr>) -> Self { + if let Some(val) = val.into_resettable().into_option() { + self.default_missing_values_os([val]) + } else { + self.default_missing_vals.clear(); + self + } + } + + /// Value for the argument when the flag is present but no value is specified. + /// + /// See [`Arg::default_missing_value`]. + /// + /// [`Arg::default_missing_value`]: Arg::default_missing_value() + /// [`OsStr`]: std::ffi::OsStr + #[inline] + #[must_use] + pub fn default_missing_value_os(self, val: impl Into<OsStr>) -> Self { + self.default_missing_values_os([val]) + } + + /// Value for the argument when the flag is present but no value is specified. + /// + /// See [`Arg::default_missing_value`]. + /// + /// [`Arg::default_missing_value`]: Arg::default_missing_value() + #[inline] + #[must_use] + pub fn default_missing_values(self, vals: impl IntoIterator<Item = impl Into<OsStr>>) -> Self { + self.default_missing_values_os(vals) + } + + /// Value for the argument when the flag is present but no value is specified. + /// + /// See [`Arg::default_missing_values`]. + /// + /// [`Arg::default_missing_values`]: Arg::default_missing_values() + /// [`OsStr`]: std::ffi::OsStr + #[inline] + #[must_use] + pub fn default_missing_values_os( + mut self, + vals: impl IntoIterator<Item = impl Into<OsStr>>, + ) -> Self { + self.default_missing_vals = vals.into_iter().map(|s| s.into()).collect(); + self + } + + /// Read from `name` environment variable when argument is not present. + /// + /// If it is not present in the environment, then default + /// rules will apply. + /// + /// If user sets the argument in the environment: + /// - When [`Arg::action(ArgAction::Set)`] is not set, the flag is considered raised. + /// - When [`Arg::action(ArgAction::Set)`] is set, + /// [`ArgMatches::get_one`][crate::ArgMatches::get_one] will + /// return value of the environment variable. + /// + /// If user doesn't set the argument in the environment: + /// - When [`Arg::action(ArgAction::Set)`] is not set, the flag is considered off. + /// - When [`Arg::action(ArgAction::Set)`] is set, + /// [`ArgMatches::get_one`][crate::ArgMatches::get_one] will + /// return the default specified. + /// + /// # Examples + /// + /// In this example, we show the variable coming from the environment: + /// + /// ```rust + /// # use std::env; + /// # use clap::{Command, Arg, ArgAction}; + /// + /// env::set_var("MY_FLAG", "env"); + /// + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .env("MY_FLAG") + /// .action(ArgAction::Set)) + /// .get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("flag").unwrap(), "env"); + /// ``` + /// + /// In this example, because `prog` is a flag that accepts an optional, case-insensitive + /// boolean literal. + /// + /// Note that the value parser controls how flags are parsed. In this case we've selected + /// [`FalseyValueParser`][crate::builder::FalseyValueParser]. A `false` literal is `n`, `no`, + /// `f`, `false`, `off` or `0`. An absent environment variable will also be considered as + /// `false`. Anything else will considered as `true`. + /// + /// ```rust + /// # use std::env; + /// # use clap::{Command, Arg, ArgAction}; + /// # use clap::builder::FalseyValueParser; + /// + /// env::set_var("TRUE_FLAG", "true"); + /// env::set_var("FALSE_FLAG", "0"); + /// + /// let m = Command::new("prog") + /// .arg(Arg::new("true_flag") + /// .long("true_flag") + /// .action(ArgAction::SetTrue) + /// .value_parser(FalseyValueParser::new()) + /// .env("TRUE_FLAG")) + /// .arg(Arg::new("false_flag") + /// .long("false_flag") + /// .action(ArgAction::SetTrue) + /// .value_parser(FalseyValueParser::new()) + /// .env("FALSE_FLAG")) + /// .arg(Arg::new("absent_flag") + /// .long("absent_flag") + /// .action(ArgAction::SetTrue) + /// .value_parser(FalseyValueParser::new()) + /// .env("ABSENT_FLAG")) + /// .get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert!(m.get_flag("true_flag")); + /// assert!(!m.get_flag("false_flag")); + /// assert!(!m.get_flag("absent_flag")); + /// ``` + /// + /// In this example, we show the variable coming from an option on the CLI: + /// + /// ```rust + /// # use std::env; + /// # use clap::{Command, Arg, ArgAction}; + /// + /// env::set_var("MY_FLAG", "env"); + /// + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .env("MY_FLAG") + /// .action(ArgAction::Set)) + /// .get_matches_from(vec![ + /// "prog", "--flag", "opt" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("flag").unwrap(), "opt"); + /// ``` + /// + /// In this example, we show the variable coming from the environment even with the + /// presence of a default: + /// + /// ```rust + /// # use std::env; + /// # use clap::{Command, Arg, ArgAction}; + /// + /// env::set_var("MY_FLAG", "env"); + /// + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .env("MY_FLAG") + /// .action(ArgAction::Set) + /// .default_value("default")) + /// .get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("flag").unwrap(), "env"); + /// ``` + /// + /// In this example, we show the use of multiple values in a single environment variable: + /// + /// ```rust + /// # use std::env; + /// # use clap::{Command, Arg, ArgAction}; + /// + /// env::set_var("MY_FLAG_MULTI", "env1,env2"); + /// + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .env("MY_FLAG_MULTI") + /// .action(ArgAction::Set) + /// .num_args(1..) + /// .value_delimiter(',')) + /// .get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert_eq!(m.get_many::<String>("flag").unwrap().collect::<Vec<_>>(), vec!["env1", "env2"]); + /// ``` + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + /// [`Arg::value_delimiter(',')`]: Arg::value_delimiter() + #[cfg(feature = "env")] + #[inline] + #[must_use] + pub fn env(mut self, name: impl IntoResettable<OsStr>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + let value = env::var_os(&name); + self.env = Some((name, value)); + } else { + self.env = None; + } + self + } + + #[cfg(feature = "env")] + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::env`") + )] + pub fn env_os(self, name: impl Into<OsStr>) -> Self { + self.env(name) + } +} + +/// # Help +impl Arg { + /// Sets the description of the argument for short help (`-h`). + /// + /// Typically, this is a short (one line) description of the arg. + /// + /// If [`Arg::long_help`] is not specified, this message will be displayed for `--help`. + /// + /// **NOTE:** Only `Arg::help` is used in completion script generation in order to be concise + /// + /// # Examples + /// + /// Any valid UTF-8 is allowed in the help text. The one exception is when one wishes to + /// include a newline in the help text and have the following text be properly aligned with all + /// the other help text. + /// + /// Setting `help` displays a short message to the side of the argument when the user passes + /// `-h` or `--help` (by default). + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .long("config") + /// .help("Some help text describing the --config arg")) + /// .get_matches_from(vec![ + /// "prog", "--help" + /// ]); + /// ``` + /// + /// The above example displays + /// + /// ```notrust + /// helptest + /// + /// Usage: helptest [OPTIONS] + /// + /// Options: + /// --config Some help text describing the --config arg + /// -h, --help Print help information + /// -V, --version Print version information + /// ``` + /// [`Arg::long_help`]: Arg::long_help() + #[inline] + #[must_use] + pub fn help(mut self, h: impl IntoResettable<StyledStr>) -> Self { + self.help = h.into_resettable().into_option(); + self + } + + /// Sets the description of the argument for long help (`--help`). + /// + /// Typically this a more detailed (multi-line) message + /// that describes the arg. + /// + /// If [`Arg::help`] is not specified, this message will be displayed for `-h`. + /// + /// **NOTE:** Only [`Arg::help`] is used in completion script generation in order to be concise + /// + /// # Examples + /// + /// Any valid UTF-8 is allowed in the help text. The one exception is when one wishes to + /// include a newline in the help text and have the following text be properly aligned with all + /// the other help text. + /// + /// Setting `help` displays a short message to the side of the argument when the user passes + /// `-h` or `--help` (by default). + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .long("config") + /// .long_help( + /// "The config file used by the myprog must be in JSON format + /// with only valid keys and may not contain other nonsense + /// that cannot be read by this program. Obviously I'm going on + /// and on, so I'll stop now.")) + /// .get_matches_from(vec![ + /// "prog", "--help" + /// ]); + /// ``` + /// + /// The above example displays + /// + /// ```text + /// prog + /// + /// Usage: prog [OPTIONS] + /// + /// Options: + /// --config + /// The config file used by the myprog must be in JSON format + /// with only valid keys and may not contain other nonsense + /// that cannot be read by this program. Obviously I'm going on + /// and on, so I'll stop now. + /// + /// -h, --help + /// Print help information + /// + /// -V, --version + /// Print version information + /// ``` + /// [`Arg::help`]: Arg::help() + #[inline] + #[must_use] + pub fn long_help(mut self, h: impl IntoResettable<StyledStr>) -> Self { + self.long_help = h.into_resettable().into_option(); + self + } + + /// Allows custom ordering of args within the help message. + /// + /// Args with a lower value will be displayed first in the help message. This is helpful when + /// one would like to emphasise frequently used args, or prioritize those towards the top of + /// the list. Args with duplicate display orders will be displayed in alphabetical order. + /// + /// **NOTE:** The default is 999 for all arguments. + /// + /// **NOTE:** This setting is ignored for [positional arguments] which are always displayed in + /// [index] order. + /// + /// # Examples + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("a") // Typically args are grouped alphabetically by name. + /// // Args without a display_order have a value of 999 and are + /// // displayed alphabetically with all other 999 valued args. + /// .long("long-option") + /// .short('o') + /// .action(ArgAction::Set) + /// .help("Some help and text")) + /// .arg(Arg::new("b") + /// .long("other-option") + /// .short('O') + /// .action(ArgAction::Set) + /// .display_order(1) // In order to force this arg to appear *first* + /// // all we have to do is give it a value lower than 999. + /// // Any other args with a value of 1 will be displayed + /// // alphabetically with this one...then 2 values, then 3, etc. + /// .help("I should be first!")) + /// .get_matches_from(vec![ + /// "prog", "--help" + /// ]); + /// ``` + /// + /// The above example displays the following help message + /// + /// ```text + /// cust-ord + /// + /// Usage: cust-ord [OPTIONS] + /// + /// Options: + /// -h, --help Print help information + /// -V, --version Print version information + /// -O, --other-option <b> I should be first! + /// -o, --long-option <a> Some help and text + /// ``` + /// [positional arguments]: Arg::index() + /// [index]: Arg::index() + #[inline] + #[must_use] + pub fn display_order(mut self, ord: impl IntoResettable<usize>) -> Self { + self.disp_ord = ord.into_resettable().into_option(); + self + } + + /// Override the [current] help section. + /// + /// [current]: crate::Command::next_help_heading + #[inline] + #[must_use] + pub fn help_heading(mut self, heading: impl IntoResettable<Str>) -> Self { + self.help_heading = Some(heading.into_resettable().into_option()); + self + } + + /// Render the [help][Arg::help] on the line after the argument. + /// + /// This can be helpful for arguments with very long or complex help messages. + /// This can also be helpful for arguments with very long flag names, or many/long value names. + /// + /// **NOTE:** To apply this setting to all arguments and subcommands, consider using + /// [`crate::Command::next_line_help`] + /// + /// # Examples + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("opt") + /// .long("long-option-flag") + /// .short('o') + /// .action(ArgAction::Set) + /// .next_line_help(true) + /// .value_names(["value1", "value2"]) + /// .help("Some really long help and complex\n\ + /// help that makes more sense to be\n\ + /// on a line after the option")) + /// .get_matches_from(vec![ + /// "prog", "--help" + /// ]); + /// ``` + /// + /// The above example displays the following help message + /// + /// ```text + /// nlh + /// + /// Usage: nlh [OPTIONS] + /// + /// Options: + /// -h, --help Print help information + /// -V, --version Print version information + /// -o, --long-option-flag <value1> <value2> + /// Some really long help and complex + /// help that makes more sense to be + /// on a line after the option + /// ``` + #[inline] + #[must_use] + pub fn next_line_help(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::NextLineHelp) + } else { + self.unset_setting(ArgSettings::NextLineHelp) + } + } + + /// Do not display the argument in help message. + /// + /// **NOTE:** This does **not** hide the argument from usage strings on error + /// + /// # Examples + /// + /// Setting `Hidden` will hide the argument when displaying help text + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .long("config") + /// .hide(true) + /// .help("Some help text describing the --config arg")) + /// .get_matches_from(vec![ + /// "prog", "--help" + /// ]); + /// ``` + /// + /// The above example displays + /// + /// ```text + /// helptest + /// + /// Usage: helptest [OPTIONS] + /// + /// Options: + /// -h, --help Print help information + /// -V, --version Print version information + /// ``` + #[inline] + #[must_use] + pub fn hide(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::Hidden) + } else { + self.unset_setting(ArgSettings::Hidden) + } + } + + /// Do not display the [possible values][crate::builder::ValueParser::possible_values] in the help message. + /// + /// This is useful for args with many values, or ones which are explained elsewhere in the + /// help text. + /// + /// **NOTE:** Setting this requires [taking values][Arg::num_args] + /// + /// To set this for all arguments, see + /// [`Command::hide_possible_values`][crate::Command::hide_possible_values]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("mode") + /// .long("mode") + /// .value_parser(["fast", "slow"]) + /// .action(ArgAction::Set) + /// .hide_possible_values(true)); + /// ``` + /// If we were to run the above program with `--help` the `[values: fast, slow]` portion of + /// the help text would be omitted. + #[inline] + #[must_use] + pub fn hide_possible_values(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::HidePossibleValues) + } else { + self.unset_setting(ArgSettings::HidePossibleValues) + } + } + + /// Do not display the default value of the argument in the help message. + /// + /// This is useful when default behavior of an arg is explained elsewhere in the help text. + /// + /// **NOTE:** Setting this requires [taking values][Arg::num_args] + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("connect") + /// .arg(Arg::new("host") + /// .long("host") + /// .default_value("localhost") + /// .action(ArgAction::Set) + /// .hide_default_value(true)); + /// + /// ``` + /// + /// If we were to run the above program with `--help` the `[default: localhost]` portion of + /// the help text would be omitted. + #[inline] + #[must_use] + pub fn hide_default_value(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::HideDefaultValue) + } else { + self.unset_setting(ArgSettings::HideDefaultValue) + } + } + + /// Do not display in help the environment variable name. + /// + /// This is useful when the variable option is explained elsewhere in the help text. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("mode") + /// .long("mode") + /// .env("MODE") + /// .action(ArgAction::Set) + /// .hide_env(true)); + /// ``` + /// + /// If we were to run the above program with `--help` the `[env: MODE]` portion of the help + /// text would be omitted. + #[cfg(feature = "env")] + #[inline] + #[must_use] + pub fn hide_env(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::HideEnv) + } else { + self.unset_setting(ArgSettings::HideEnv) + } + } + + /// Do not display in help any values inside the associated ENV variables for the argument. + /// + /// This is useful when ENV vars contain sensitive values. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("connect") + /// .arg(Arg::new("host") + /// .long("host") + /// .env("CONNECT") + /// .action(ArgAction::Set) + /// .hide_env_values(true)); + /// + /// ``` + /// + /// If we were to run the above program with `$ CONNECT=super_secret connect --help` the + /// `[default: CONNECT=super_secret]` portion of the help text would be omitted. + #[cfg(feature = "env")] + #[inline] + #[must_use] + pub fn hide_env_values(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::HideEnvValues) + } else { + self.unset_setting(ArgSettings::HideEnvValues) + } + } + + /// Hides an argument from short help (`-h`). + /// + /// **NOTE:** This does **not** hide the argument from usage strings on error + /// + /// **NOTE:** Setting this option will cause next-line-help output style to be used + /// when long help (`--help`) is called. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// Arg::new("debug") + /// .hide_short_help(true); + /// ``` + /// + /// Setting `hide_short_help(true)` will hide the argument when displaying short help text + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .long("config") + /// .hide_short_help(true) + /// .help("Some help text describing the --config arg")) + /// .get_matches_from(vec![ + /// "prog", "-h" + /// ]); + /// ``` + /// + /// The above example displays + /// + /// ```text + /// helptest + /// + /// Usage: helptest [OPTIONS] + /// + /// Options: + /// -h, --help Print help information + /// -V, --version Print version information + /// ``` + /// + /// However, when --help is called + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .long("config") + /// .hide_short_help(true) + /// .help("Some help text describing the --config arg")) + /// .get_matches_from(vec![ + /// "prog", "--help" + /// ]); + /// ``` + /// + /// Then the following would be displayed + /// + /// ```text + /// helptest + /// + /// Usage: helptest [OPTIONS] + /// + /// Options: + /// --config Some help text describing the --config arg + /// -h, --help Print help information + /// -V, --version Print version information + /// ``` + #[inline] + #[must_use] + pub fn hide_short_help(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::HiddenShortHelp) + } else { + self.unset_setting(ArgSettings::HiddenShortHelp) + } + } + + /// Hides an argument from long help (`--help`). + /// + /// **NOTE:** This does **not** hide the argument from usage strings on error + /// + /// **NOTE:** Setting this option will cause next-line-help output style to be used + /// when long help (`--help`) is called. + /// + /// # Examples + /// + /// Setting `hide_long_help(true)` will hide the argument when displaying long help text + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .long("config") + /// .hide_long_help(true) + /// .help("Some help text describing the --config arg")) + /// .get_matches_from(vec![ + /// "prog", "--help" + /// ]); + /// ``` + /// + /// The above example displays + /// + /// ```text + /// helptest + /// + /// Usage: helptest [OPTIONS] + /// + /// Options: + /// -h, --help Print help information + /// -V, --version Print version information + /// ``` + /// + /// However, when -h is called + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .long("config") + /// .hide_long_help(true) + /// .help("Some help text describing the --config arg")) + /// .get_matches_from(vec![ + /// "prog", "-h" + /// ]); + /// ``` + /// + /// Then the following would be displayed + /// + /// ```text + /// helptest + /// + /// Usage: helptest [OPTIONS] + /// + /// OPTIONS: + /// --config Some help text describing the --config arg + /// -h, --help Print help information + /// -V, --version Print version information + /// ``` + #[inline] + #[must_use] + pub fn hide_long_help(self, yes: bool) -> Self { + if yes { + self.setting(ArgSettings::HiddenLongHelp) + } else { + self.unset_setting(ArgSettings::HiddenLongHelp) + } + } +} + +/// # Advanced Argument Relations +impl Arg { + /// The name of the [`ArgGroup`] the argument belongs to. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// Arg::new("debug") + /// .long("debug") + /// .action(ArgAction::SetTrue) + /// .group("mode") + /// # ; + /// ``` + /// + /// Multiple arguments can be a member of a single group and then the group checked as if it + /// was one of said arguments. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("debug") + /// .long("debug") + /// .action(ArgAction::SetTrue) + /// .group("mode")) + /// .arg(Arg::new("verbose") + /// .long("verbose") + /// .action(ArgAction::SetTrue) + /// .group("mode")) + /// .get_matches_from(vec![ + /// "prog", "--debug" + /// ]); + /// assert!(m.contains_id("mode")); + /// ``` + /// + /// [`ArgGroup`]: crate::ArgGroup + #[must_use] + pub fn group(mut self, group_id: impl IntoResettable<Id>) -> Self { + if let Some(group_id) = group_id.into_resettable().into_option() { + self.groups.push(group_id); + } else { + self.groups.clear(); + } + self + } + + /// The names of [`ArgGroup`]'s the argument belongs to. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// Arg::new("debug") + /// .long("debug") + /// .action(ArgAction::SetTrue) + /// .groups(["mode", "verbosity"]) + /// # ; + /// ``` + /// + /// Arguments can be members of multiple groups and then the group checked as if it + /// was one of said arguments. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("debug") + /// .long("debug") + /// .action(ArgAction::SetTrue) + /// .groups(["mode", "verbosity"])) + /// .arg(Arg::new("verbose") + /// .long("verbose") + /// .action(ArgAction::SetTrue) + /// .groups(["mode", "verbosity"])) + /// .get_matches_from(vec![ + /// "prog", "--debug" + /// ]); + /// assert!(m.contains_id("mode")); + /// assert!(m.contains_id("verbosity")); + /// ``` + /// + /// [`ArgGroup`]: crate::ArgGroup + #[must_use] + pub fn groups(mut self, group_ids: impl IntoIterator<Item = impl Into<Id>>) -> Self { + self.groups.extend(group_ids.into_iter().map(Into::into)); + self + } + + /// Specifies the value of the argument if `arg` has been used at runtime. + /// + /// If `default` is set to `None`, `default_value` will be removed. + /// + /// **NOTE:** This setting is perfectly compatible with [`Arg::default_value`] but slightly + /// different. `Arg::default_value` *only* takes effect when the user has not provided this arg + /// at runtime. This setting however only takes effect when the user has not provided a value at + /// runtime **and** these other conditions are met as well. If you have set `Arg::default_value` + /// and `Arg::default_value_if`, and the user **did not** provide this arg at runtime, nor were + /// the conditions met for `Arg::default_value_if`, the `Arg::default_value` will be applied. + /// + /// **NOTE:** This implicitly sets [`Arg::action(ArgAction::Set)`]. + /// + /// # Examples + /// + /// First we use the default value only if another arg is present at runtime. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// # use clap::builder::{ArgPredicate}; + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("other") + /// .long("other") + /// .default_value_if("flag", ArgPredicate::IsPresent, Some("default"))) + /// .get_matches_from(vec![ + /// "prog", "--flag" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("other").unwrap(), "default"); + /// ``` + /// + /// Next we run the same test, but without providing `--flag`. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("other") + /// .long("other") + /// .default_value_if("flag", "true", Some("default"))) + /// .get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("other"), None); + /// ``` + /// + /// Now lets only use the default value if `--opt` contains the value `special`. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("opt") + /// .action(ArgAction::Set) + /// .long("opt")) + /// .arg(Arg::new("other") + /// .long("other") + /// .default_value_if("opt", "special", Some("default"))) + /// .get_matches_from(vec![ + /// "prog", "--opt", "special" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("other").unwrap(), "default"); + /// ``` + /// + /// We can run the same test and provide any value *other than* `special` and we won't get a + /// default value. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("opt") + /// .action(ArgAction::Set) + /// .long("opt")) + /// .arg(Arg::new("other") + /// .long("other") + /// .default_value_if("opt", "special", Some("default"))) + /// .get_matches_from(vec![ + /// "prog", "--opt", "hahaha" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("other"), None); + /// ``` + /// + /// If we want to unset the default value for an Arg based on the presence or + /// value of some other Arg. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("other") + /// .long("other") + /// .default_value("default") + /// .default_value_if("flag", "true", None)) + /// .get_matches_from(vec![ + /// "prog", "--flag" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("other"), None); + /// ``` + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + /// [`Arg::default_value`]: Arg::default_value() + #[must_use] + pub fn default_value_if( + mut self, + arg_id: impl Into<Id>, + predicate: impl Into<ArgPredicate>, + default: impl IntoResettable<OsStr>, + ) -> Self { + self.default_vals_ifs.push(( + arg_id.into(), + predicate.into(), + default.into_resettable().into_option(), + )); + self + } + + #[must_use] + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::default_value_if`") + )] + pub fn default_value_if_os( + self, + arg_id: impl Into<Id>, + predicate: impl Into<ArgPredicate>, + default: impl IntoResettable<OsStr>, + ) -> Self { + self.default_value_if(arg_id, predicate, default) + } + + /// Specifies multiple values and conditions in the same manner as [`Arg::default_value_if`]. + /// + /// The method takes a slice of tuples in the `(arg, predicate, default)` format. + /// + /// **NOTE**: The conditions are stored in order and evaluated in the same order. I.e. the first + /// if multiple conditions are true, the first one found will be applied and the ultimate value. + /// + /// # Examples + /// + /// First we use the default value only if another arg is present at runtime. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("opt") + /// .long("opt") + /// .action(ArgAction::Set)) + /// .arg(Arg::new("other") + /// .long("other") + /// .default_value_ifs([ + /// ("flag", "true", Some("default")), + /// ("opt", "channal", Some("chan")), + /// ])) + /// .get_matches_from(vec![ + /// "prog", "--opt", "channal" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("other").unwrap(), "chan"); + /// ``` + /// + /// Next we run the same test, but without providing `--flag`. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("other") + /// .long("other") + /// .default_value_ifs([ + /// ("flag", "true", Some("default")), + /// ("opt", "channal", Some("chan")), + /// ])) + /// .get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("other"), None); + /// ``` + /// + /// We can also see that these values are applied in order, and if more than one condition is + /// true, only the first evaluated "wins" + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// # use clap::builder::ArgPredicate; + /// let m = Command::new("prog") + /// .arg(Arg::new("flag") + /// .long("flag") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("opt") + /// .long("opt") + /// .action(ArgAction::Set)) + /// .arg(Arg::new("other") + /// .long("other") + /// .default_value_ifs([ + /// ("flag", ArgPredicate::IsPresent, Some("default")), + /// ("opt", ArgPredicate::Equals("channal".into()), Some("chan")), + /// ])) + /// .get_matches_from(vec![ + /// "prog", "--opt", "channal", "--flag" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("other").unwrap(), "default"); + /// ``` + /// [`Arg::action(ArgAction::Set)`]: Arg::action() + /// [`Arg::default_value_if`]: Arg::default_value_if() + #[must_use] + pub fn default_value_ifs( + mut self, + ifs: impl IntoIterator< + Item = ( + impl Into<Id>, + impl Into<ArgPredicate>, + impl IntoResettable<OsStr>, + ), + >, + ) -> Self { + for (arg, predicate, default) in ifs { + self = self.default_value_if(arg, predicate, default); + } + self + } + + #[must_use] + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::default_value_ifs`") + )] + pub fn default_value_ifs_os( + self, + ifs: impl IntoIterator< + Item = ( + impl Into<Id>, + impl Into<ArgPredicate>, + impl IntoResettable<OsStr>, + ), + >, + ) -> Self { + self.default_value_ifs(ifs) + } + + /// Set this arg as [required] as long as the specified argument is not present at runtime. + /// + /// **Pro Tip:** Using `Arg::required_unless_present` implies [`Arg::required`] and is therefore not + /// mandatory to also set. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .required_unless_present("debug") + /// # ; + /// ``` + /// + /// In the following example, the required argument is *not* provided, + /// but it's not an error because the `unless` arg has been supplied. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_unless_present("dbg") + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("dbg") + /// .long("debug") + /// .action(ArgAction::SetTrue)) + /// .try_get_matches_from(vec![ + /// "prog", "--debug" + /// ]); + /// + /// assert!(res.is_ok()); + /// ``` + /// + /// Setting `Arg::required_unless_present(name)` and *not* supplying `name` or this arg is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_unless_present("dbg") + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("dbg") + /// .long("debug")) + /// .try_get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [required]: Arg::required() + #[must_use] + pub fn required_unless_present(mut self, arg_id: impl IntoResettable<Id>) -> Self { + if let Some(arg_id) = arg_id.into_resettable().into_option() { + self.r_unless.push(arg_id); + } else { + self.r_unless.clear(); + } + self + } + + /// Sets this arg as [required] unless *all* of the specified arguments are present at runtime. + /// + /// In other words, parsing will succeed only if user either + /// * supplies the `self` arg. + /// * supplies *all* of the `names` arguments. + /// + /// **NOTE:** If you wish for this argument to only be required unless *any of* these args are + /// present see [`Arg::required_unless_present_any`] + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .required_unless_present_all(["cfg", "dbg"]) + /// # ; + /// ``` + /// + /// In the following example, the required argument is *not* provided, but it's not an error + /// because *all* of the `names` args have been supplied. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_unless_present_all(["dbg", "infile"]) + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("dbg") + /// .long("debug") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("infile") + /// .short('i') + /// .action(ArgAction::Set)) + /// .try_get_matches_from(vec![ + /// "prog", "--debug", "-i", "file" + /// ]); + /// + /// assert!(res.is_ok()); + /// ``` + /// + /// Setting [`Arg::required_unless_present_all(names)`] and *not* supplying + /// either *all* of `unless` args or the `self` arg is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_unless_present_all(["dbg", "infile"]) + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("dbg") + /// .long("debug") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("infile") + /// .short('i') + /// .action(ArgAction::Set)) + /// .try_get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [required]: Arg::required() + /// [`Arg::required_unless_present_any`]: Arg::required_unless_present_any() + /// [`Arg::required_unless_present_all(names)`]: Arg::required_unless_present_all() + #[must_use] + pub fn required_unless_present_all( + mut self, + names: impl IntoIterator<Item = impl Into<Id>>, + ) -> Self { + self.r_unless_all.extend(names.into_iter().map(Into::into)); + self + } + + /// Sets this arg as [required] unless *any* of the specified arguments are present at runtime. + /// + /// In other words, parsing will succeed only if user either + /// * supplies the `self` arg. + /// * supplies *one or more* of the `unless` arguments. + /// + /// **NOTE:** If you wish for this argument to be required unless *all of* these args are + /// present see [`Arg::required_unless_present_all`] + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .required_unless_present_any(["cfg", "dbg"]) + /// # ; + /// ``` + /// + /// Setting [`Arg::required_unless_present_any(names)`] requires that the argument be used at runtime + /// *unless* *at least one of* the args in `names` are present. In the following example, the + /// required argument is *not* provided, but it's not an error because one the `unless` args + /// have been supplied. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_unless_present_any(["dbg", "infile"]) + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("dbg") + /// .long("debug") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("infile") + /// .short('i') + /// .action(ArgAction::Set)) + /// .try_get_matches_from(vec![ + /// "prog", "--debug" + /// ]); + /// + /// assert!(res.is_ok()); + /// ``` + /// + /// Setting [`Arg::required_unless_present_any(names)`] and *not* supplying *at least one of* `names` + /// or this arg is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_unless_present_any(["dbg", "infile"]) + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("dbg") + /// .long("debug") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("infile") + /// .short('i') + /// .action(ArgAction::Set)) + /// .try_get_matches_from(vec![ + /// "prog" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [required]: Arg::required() + /// [`Arg::required_unless_present_any(names)`]: Arg::required_unless_present_any() + /// [`Arg::required_unless_present_all`]: Arg::required_unless_present_all() + #[must_use] + pub fn required_unless_present_any( + mut self, + names: impl IntoIterator<Item = impl Into<Id>>, + ) -> Self { + self.r_unless.extend(names.into_iter().map(Into::into)); + self + } + + /// This argument is [required] only if the specified `arg` is present at runtime and its value + /// equals `val`. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .required_if_eq("other_arg", "value") + /// # ; + /// ``` + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .required_if_eq("other", "special") + /// .long("config")) + /// .arg(Arg::new("other") + /// .long("other") + /// .action(ArgAction::Set)) + /// .try_get_matches_from(vec![ + /// "prog", "--other", "not-special" + /// ]); + /// + /// assert!(res.is_ok()); // We didn't use --other=special, so "cfg" wasn't required + /// + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .required_if_eq("other", "special") + /// .long("config")) + /// .arg(Arg::new("other") + /// .long("other") + /// .action(ArgAction::Set)) + /// .try_get_matches_from(vec![ + /// "prog", "--other", "special" + /// ]); + /// + /// // We did use --other=special so "cfg" had become required but was missing. + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .required_if_eq("other", "special") + /// .long("config")) + /// .arg(Arg::new("other") + /// .long("other") + /// .action(ArgAction::Set)) + /// .try_get_matches_from(vec![ + /// "prog", "--other", "SPECIAL" + /// ]); + /// + /// // By default, the comparison is case-sensitive, so "cfg" wasn't required + /// assert!(res.is_ok()); + /// + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .required_if_eq("other", "special") + /// .long("config")) + /// .arg(Arg::new("other") + /// .long("other") + /// .ignore_case(true) + /// .action(ArgAction::Set)) + /// .try_get_matches_from(vec![ + /// "prog", "--other", "SPECIAL" + /// ]); + /// + /// // However, case-insensitive comparisons can be enabled. This typically occurs when using Arg::possible_values(). + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [`Arg::requires(name)`]: Arg::requires() + /// [Conflicting]: Arg::conflicts_with() + /// [required]: Arg::required() + #[must_use] + pub fn required_if_eq(mut self, arg_id: impl Into<Id>, val: impl Into<OsStr>) -> Self { + self.r_ifs.push((arg_id.into(), val.into())); + self + } + + /// Specify this argument is [required] based on multiple conditions. + /// + /// The conditions are set up in a `(arg, val)` style tuple. The requirement will only become + /// valid if one of the specified `arg`'s value equals its corresponding `val`. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .required_if_eq_any([ + /// ("extra", "val"), + /// ("option", "spec") + /// ]) + /// # ; + /// ``` + /// + /// Setting `Arg::required_if_eq_any([(arg, val)])` makes this arg required if any of the `arg`s + /// are used at runtime and it's corresponding value is equal to `val`. If the `arg`'s value is + /// anything other than `val`, this argument isn't required. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_if_eq_any([ + /// ("extra", "val"), + /// ("option", "spec") + /// ]) + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("extra") + /// .action(ArgAction::Set) + /// .long("extra")) + /// .arg(Arg::new("option") + /// .action(ArgAction::Set) + /// .long("option")) + /// .try_get_matches_from(vec![ + /// "prog", "--option", "other" + /// ]); + /// + /// assert!(res.is_ok()); // We didn't use --option=spec, or --extra=val so "cfg" isn't required + /// ``` + /// + /// Setting `Arg::required_if_eq_any([(arg, val)])` and having any of the `arg`s used with its + /// value of `val` but *not* using this arg is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_if_eq_any([ + /// ("extra", "val"), + /// ("option", "spec") + /// ]) + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("extra") + /// .action(ArgAction::Set) + /// .long("extra")) + /// .arg(Arg::new("option") + /// .action(ArgAction::Set) + /// .long("option")) + /// .try_get_matches_from(vec![ + /// "prog", "--option", "spec" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [`Arg::requires(name)`]: Arg::requires() + /// [Conflicting]: Arg::conflicts_with() + /// [required]: Arg::required() + #[must_use] + pub fn required_if_eq_any( + mut self, + ifs: impl IntoIterator<Item = (impl Into<Id>, impl Into<OsStr>)>, + ) -> Self { + self.r_ifs + .extend(ifs.into_iter().map(|(id, val)| (id.into(), val.into()))); + self + } + + /// Specify this argument is [required] based on multiple conditions. + /// + /// The conditions are set up in a `(arg, val)` style tuple. The requirement will only become + /// valid if every one of the specified `arg`'s value equals its corresponding `val`. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .required_if_eq_all([ + /// ("extra", "val"), + /// ("option", "spec") + /// ]) + /// # ; + /// ``` + /// + /// Setting `Arg::required_if_eq_all([(arg, val)])` makes this arg required if all of the `arg`s + /// are used at runtime and every value is equal to its corresponding `val`. If the `arg`'s value is + /// anything other than `val`, this argument isn't required. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_if_eq_all([ + /// ("extra", "val"), + /// ("option", "spec") + /// ]) + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("extra") + /// .action(ArgAction::Set) + /// .long("extra")) + /// .arg(Arg::new("option") + /// .action(ArgAction::Set) + /// .long("option")) + /// .try_get_matches_from(vec![ + /// "prog", "--option", "spec" + /// ]); + /// + /// assert!(res.is_ok()); // We didn't use --option=spec --extra=val so "cfg" isn't required + /// ``` + /// + /// Setting `Arg::required_if_eq_all([(arg, val)])` and having all of the `arg`s used with its + /// value of `val` but *not* using this arg is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .required_if_eq_all([ + /// ("extra", "val"), + /// ("option", "spec") + /// ]) + /// .action(ArgAction::Set) + /// .long("config")) + /// .arg(Arg::new("extra") + /// .action(ArgAction::Set) + /// .long("extra")) + /// .arg(Arg::new("option") + /// .action(ArgAction::Set) + /// .long("option")) + /// .try_get_matches_from(vec![ + /// "prog", "--extra", "val", "--option", "spec" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [required]: Arg::required() + #[must_use] + pub fn required_if_eq_all( + mut self, + ifs: impl IntoIterator<Item = (impl Into<Id>, impl Into<OsStr>)>, + ) -> Self { + self.r_ifs_all + .extend(ifs.into_iter().map(|(id, val)| (id.into(), val.into()))); + self + } + + /// Require another argument if this arg matches the [`ArgPredicate`] + /// + /// This method takes `value, another_arg` pair. At runtime, clap will check + /// if this arg (`self`) matches the [`ArgPredicate`]. + /// If it does, `another_arg` will be marked as required. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .requires_if("val", "arg") + /// # ; + /// ``` + /// + /// Setting `Arg::requires_if(val, arg)` requires that the `arg` be used at runtime if the + /// defining argument's value is equal to `val`. If the defining argument is anything other than + /// `val`, the other argument isn't required. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .requires_if("my.cfg", "other") + /// .long("config")) + /// .arg(Arg::new("other")) + /// .try_get_matches_from(vec![ + /// "prog", "--config", "some.cfg" + /// ]); + /// + /// assert!(res.is_ok()); // We didn't use --config=my.cfg, so other wasn't required + /// ``` + /// + /// Setting `Arg::requires_if(val, arg)` and setting the value to `val` but *not* supplying + /// `arg` is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .requires_if("my.cfg", "input") + /// .long("config")) + /// .arg(Arg::new("input")) + /// .try_get_matches_from(vec![ + /// "prog", "--config", "my.cfg" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [`Arg::requires(name)`]: Arg::requires() + /// [Conflicting]: Arg::conflicts_with() + /// [override]: Arg::overrides_with() + #[must_use] + pub fn requires_if(mut self, val: impl Into<ArgPredicate>, arg_id: impl Into<Id>) -> Self { + self.requires.push((val.into(), arg_id.into())); + self + } + + /// Allows multiple conditional requirements. + /// + /// The requirement will only become valid if this arg's value matches the + /// [`ArgPredicate`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .requires_ifs([ + /// ("val", "arg"), + /// ("other_val", "arg2"), + /// ]) + /// # ; + /// ``` + /// + /// Setting `Arg::requires_ifs(["val", "arg"])` requires that the `arg` be used at runtime if the + /// defining argument's value is equal to `val`. If the defining argument's value is anything other + /// than `val`, `arg` isn't required. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .requires_ifs([ + /// ("special.conf", "opt"), + /// ("other.conf", "other"), + /// ]) + /// .long("config")) + /// .arg(Arg::new("opt") + /// .long("option") + /// .action(ArgAction::Set)) + /// .arg(Arg::new("other")) + /// .try_get_matches_from(vec![ + /// "prog", "--config", "special.conf" + /// ]); + /// + /// assert!(res.is_err()); // We used --config=special.conf so --option <val> is required + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// + /// Setting `Arg::requires_ifs` with [`ArgPredicate::IsPresent`] and *not* supplying all the + /// arguments is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction, builder::ArgPredicate}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .requires_ifs([ + /// (ArgPredicate::IsPresent, "input"), + /// (ArgPredicate::IsPresent, "output"), + /// ]) + /// .long("config")) + /// .arg(Arg::new("input")) + /// .arg(Arg::new("output")) + /// .try_get_matches_from(vec![ + /// "prog", "--config", "file.conf", "in.txt" + /// ]); + /// + /// assert!(res.is_err()); + /// // We didn't use output + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// + /// [`Arg::requires(name)`]: Arg::requires() + /// [Conflicting]: Arg::conflicts_with() + /// [override]: Arg::overrides_with() + #[must_use] + pub fn requires_ifs( + mut self, + ifs: impl IntoIterator<Item = (impl Into<ArgPredicate>, impl Into<Id>)>, + ) -> Self { + self.requires + .extend(ifs.into_iter().map(|(val, arg)| (val.into(), arg.into()))); + self + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::requires_ifs`") + )] + pub fn requires_all(self, ids: impl IntoIterator<Item = impl Into<Id>>) -> Self { + self.requires_ifs(ids.into_iter().map(|id| (ArgPredicate::IsPresent, id))) + } + + /// This argument is mutually exclusive with the specified argument. + /// + /// **NOTE:** Conflicting rules take precedence over being required by default. Conflict rules + /// only need to be set for one of the two arguments, they do not need to be set for each. + /// + /// **NOTE:** Defining a conflict is two-way, but does *not* need to defined for both arguments + /// (i.e. if A conflicts with B, defining A.conflicts_with(B) is sufficient. You do not + /// need to also do B.conflicts_with(A)) + /// + /// **NOTE:** [`Arg::conflicts_with_all(names)`] allows specifying an argument which conflicts with more than one argument. + /// + /// **NOTE** [`Arg::exclusive(true)`] allows specifying an argument which conflicts with every other argument. + /// + /// **NOTE:** All arguments implicitly conflict with themselves. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .conflicts_with("debug") + /// # ; + /// ``` + /// + /// Setting conflicting argument, and having both arguments present at runtime is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .conflicts_with("debug") + /// .long("config")) + /// .arg(Arg::new("debug") + /// .long("debug") + /// .action(ArgAction::SetTrue)) + /// .try_get_matches_from(vec![ + /// "prog", "--debug", "--config", "file.conf" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::ArgumentConflict); + /// ``` + /// + /// [`Arg::conflicts_with_all(names)`]: Arg::conflicts_with_all() + /// [`Arg::exclusive(true)`]: Arg::exclusive() + #[must_use] + pub fn conflicts_with(mut self, arg_id: impl IntoResettable<Id>) -> Self { + if let Some(arg_id) = arg_id.into_resettable().into_option() { + self.blacklist.push(arg_id); + } else { + self.blacklist.clear(); + } + self + } + + /// This argument is mutually exclusive with the specified arguments. + /// + /// See [`Arg::conflicts_with`]. + /// + /// **NOTE:** Conflicting rules take precedence over being required by default. Conflict rules + /// only need to be set for one of the two arguments, they do not need to be set for each. + /// + /// **NOTE:** Defining a conflict is two-way, but does *not* need to defined for both arguments + /// (i.e. if A conflicts with B, defining A.conflicts_with(B) is sufficient. You do not need + /// need to also do B.conflicts_with(A)) + /// + /// **NOTE:** [`Arg::exclusive(true)`] allows specifying an argument which conflicts with every other argument. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// Arg::new("config") + /// .conflicts_with_all(["debug", "input"]) + /// # ; + /// ``` + /// + /// Setting conflicting argument, and having any of the arguments present at runtime with a + /// conflicting argument is an error. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind, ArgAction}; + /// let res = Command::new("prog") + /// .arg(Arg::new("cfg") + /// .action(ArgAction::Set) + /// .conflicts_with_all(["debug", "input"]) + /// .long("config")) + /// .arg(Arg::new("debug") + /// .long("debug")) + /// .arg(Arg::new("input")) + /// .try_get_matches_from(vec![ + /// "prog", "--config", "file.conf", "file.txt" + /// ]); + /// + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::ArgumentConflict); + /// ``` + /// [`Arg::conflicts_with`]: Arg::conflicts_with() + /// [`Arg::exclusive(true)`]: Arg::exclusive() + #[must_use] + pub fn conflicts_with_all(mut self, names: impl IntoIterator<Item = impl Into<Id>>) -> Self { + self.blacklist.extend(names.into_iter().map(Into::into)); + self + } + + /// Sets an overridable argument. + /// + /// i.e. this argument and the following argument + /// will override each other in POSIX style (whichever argument was specified at runtime + /// **last** "wins") + /// + /// **NOTE:** When an argument is overridden it is essentially as if it never was used, any + /// conflicts, requirements, etc. are evaluated **after** all "overrides" have been removed + /// + /// **NOTE:** Overriding an argument implies they [conflict][Arg::conflicts_with`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, arg}; + /// let m = Command::new("prog") + /// .arg(arg!(-f --flag "some flag") + /// .conflicts_with("debug")) + /// .arg(arg!(-d --debug "other flag")) + /// .arg(arg!(-c --color "third flag") + /// .overrides_with("flag")) + /// .get_matches_from(vec![ + /// "prog", "-f", "-d", "-c"]); + /// // ^~~~~~~~~~~~^~~~~ flag is overridden by color + /// + /// assert!(m.get_flag("color")); + /// assert!(m.get_flag("debug")); // even though flag conflicts with debug, it's as if flag + /// // was never used because it was overridden with color + /// assert!(!m.get_flag("flag")); + /// ``` + #[must_use] + pub fn overrides_with(mut self, arg_id: impl IntoResettable<Id>) -> Self { + if let Some(arg_id) = arg_id.into_resettable().into_option() { + self.overrides.push(arg_id); + } else { + self.overrides.clear(); + } + self + } + + /// Sets multiple mutually overridable arguments by name. + /// + /// i.e. this argument and the following argument will override each other in POSIX style + /// (whichever argument was specified at runtime **last** "wins") + /// + /// **NOTE:** When an argument is overridden it is essentially as if it never was used, any + /// conflicts, requirements, etc. are evaluated **after** all "overrides" have been removed + /// + /// **NOTE:** Overriding an argument implies they [conflict][Arg::conflicts_with_all`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, arg}; + /// let m = Command::new("prog") + /// .arg(arg!(-f --flag "some flag") + /// .conflicts_with("color")) + /// .arg(arg!(-d --debug "other flag")) + /// .arg(arg!(-c --color "third flag") + /// .overrides_with_all(["flag", "debug"])) + /// .get_matches_from(vec![ + /// "prog", "-f", "-d", "-c"]); + /// // ^~~~~~^~~~~~~~~ flag and debug are overridden by color + /// + /// assert!(m.get_flag("color")); // even though flag conflicts with color, it's as if flag + /// // and debug were never used because they were overridden + /// // with color + /// assert!(!m.get_flag("debug")); + /// assert!(!m.get_flag("flag")); + /// ``` + #[must_use] + pub fn overrides_with_all(mut self, names: impl IntoIterator<Item = impl Into<Id>>) -> Self { + self.overrides.extend(names.into_iter().map(Into::into)); + self + } +} + +/// # Reflection +impl Arg { + /// Get the name of the argument + #[inline] + pub fn get_id(&self) -> &Id { + &self.id + } + + /// Get the help specified for this argument, if any + #[inline] + pub fn get_help(&self) -> Option<&StyledStr> { + self.help.as_ref() + } + + /// Get the long help specified for this argument, if any + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// let arg = Arg::new("foo").long_help("long help"); + /// assert_eq!(Some("long help".to_owned()), arg.get_long_help().map(|s| s.to_string())); + /// ``` + /// + #[inline] + pub fn get_long_help(&self) -> Option<&StyledStr> { + self.long_help.as_ref() + } + + /// Get the help heading specified for this argument, if any + #[inline] + pub fn get_help_heading(&self) -> Option<&str> { + self.help_heading + .as_ref() + .map(|s| s.as_deref()) + .unwrap_or_default() + } + + /// Get the short option name for this argument, if any + #[inline] + pub fn get_short(&self) -> Option<char> { + self.short + } + + /// Get visible short aliases for this argument, if any + #[inline] + pub fn get_visible_short_aliases(&self) -> Option<Vec<char>> { + if self.short_aliases.is_empty() { + None + } else { + Some( + self.short_aliases + .iter() + .filter_map(|(c, v)| if *v { Some(c) } else { None }) + .copied() + .collect(), + ) + } + } + + /// Get *all* short aliases for this argument, if any, both visible and hidden. + #[inline] + pub fn get_all_short_aliases(&self) -> Option<Vec<char>> { + if self.short_aliases.is_empty() { + None + } else { + Some(self.short_aliases.iter().map(|(s, _)| s).copied().collect()) + } + } + + /// Get the short option name and its visible aliases, if any + #[inline] + pub fn get_short_and_visible_aliases(&self) -> Option<Vec<char>> { + let mut shorts = match self.short { + Some(short) => vec![short], + None => return None, + }; + if let Some(aliases) = self.get_visible_short_aliases() { + shorts.extend(aliases); + } + Some(shorts) + } + + /// Get the long option name for this argument, if any + #[inline] + pub fn get_long(&self) -> Option<&str> { + self.long.as_deref() + } + + /// Get visible aliases for this argument, if any + #[inline] + pub fn get_visible_aliases(&self) -> Option<Vec<&str>> { + if self.aliases.is_empty() { + None + } else { + Some( + self.aliases + .iter() + .filter_map(|(s, v)| if *v { Some(s.as_str()) } else { None }) + .collect(), + ) + } + } + + /// Get *all* aliases for this argument, if any, both visible and hidden. + #[inline] + pub fn get_all_aliases(&self) -> Option<Vec<&str>> { + if self.aliases.is_empty() { + None + } else { + Some(self.aliases.iter().map(|(s, _)| s.as_str()).collect()) + } + } + + /// Get the long option name and its visible aliases, if any + #[inline] + pub fn get_long_and_visible_aliases(&self) -> Option<Vec<&str>> { + let mut longs = match self.get_long() { + Some(long) => vec![long], + None => return None, + }; + if let Some(aliases) = self.get_visible_aliases() { + longs.extend(aliases); + } + Some(longs) + } + + /// Get the names of possible values for this argument. Only useful for user + /// facing applications, such as building help messages or man files + pub fn get_possible_values(&self) -> Vec<PossibleValue> { + if !self.is_takes_value_set() { + vec![] + } else { + self.get_value_parser() + .possible_values() + .map(|pvs| pvs.collect()) + .unwrap_or_default() + } + } + + /// Get the names of values for this argument. + #[inline] + pub fn get_value_names(&self) -> Option<&[Str]> { + if self.val_names.is_empty() { + None + } else { + Some(&self.val_names) + } + } + + /// Get the number of values for this argument. + #[inline] + pub fn get_num_args(&self) -> Option<ValueRange> { + self.num_vals + } + + #[inline] + pub(crate) fn get_min_vals(&self) -> usize { + self.get_num_args().expect(INTERNAL_ERROR_MSG).min_values() + } + + /// Get the delimiter between multiple values + #[inline] + pub fn get_value_delimiter(&self) -> Option<char> { + self.val_delim + } + + /// Get the value terminator for this argument. The value_terminator is a value + /// that terminates parsing of multi-valued arguments. + #[inline] + pub fn get_value_terminator(&self) -> Option<&Str> { + self.terminator.as_ref() + } + + /// Get the index of this argument, if any + #[inline] + pub fn get_index(&self) -> Option<usize> { + self.index + } + + /// Get the value hint of this argument + pub fn get_value_hint(&self) -> ValueHint { + self.value_hint.unwrap_or_else(|| { + if self.is_takes_value_set() { + let type_id = self.get_value_parser().type_id(); + if type_id == crate::parser::AnyValueId::of::<std::path::PathBuf>() { + ValueHint::AnyPath + } else { + ValueHint::default() + } + } else { + ValueHint::default() + } + }) + } + + /// Get the environment variable name specified for this argument, if any + /// + /// # Examples + /// + /// ```rust + /// # use std::ffi::OsStr; + /// # use clap::Arg; + /// let arg = Arg::new("foo").env("ENVIRONMENT"); + /// assert_eq!(arg.get_env(), Some(OsStr::new("ENVIRONMENT"))); + /// ``` + #[cfg(feature = "env")] + pub fn get_env(&self) -> Option<&std::ffi::OsStr> { + self.env.as_ref().map(|x| x.0.as_os_str()) + } + + /// Get the default values specified for this argument, if any + /// + /// # Examples + /// + /// ```rust + /// # use clap::Arg; + /// let arg = Arg::new("foo").default_value("default value"); + /// assert_eq!(arg.get_default_values(), &["default value"]); + /// ``` + pub fn get_default_values(&self) -> &[OsStr] { + &self.default_vals + } + + /// Checks whether this argument is a positional or not. + /// + /// # Examples + /// + /// ``` + /// # use clap::Arg; + /// let arg = Arg::new("foo"); + /// assert_eq!(arg.is_positional(), true); + /// + /// let arg = Arg::new("foo").long("foo"); + /// assert_eq!(arg.is_positional(), false); + /// ``` + pub fn is_positional(&self) -> bool { + self.get_long().is_none() && self.get_short().is_none() + } + + /// Reports whether [`Arg::required`] is set + pub fn is_required_set(&self) -> bool { + self.is_set(ArgSettings::Required) + } + + pub(crate) fn is_multiple_values_set(&self) -> bool { + self.get_num_args().unwrap_or_default().is_multiple() + } + + pub(crate) fn is_takes_value_set(&self) -> bool { + self.get_action().takes_values() + } + + /// Report whether [`Arg::allow_hyphen_values`] is set + pub fn is_allow_hyphen_values_set(&self) -> bool { + self.is_set(ArgSettings::AllowHyphenValues) + } + + /// Report whether [`Arg::allow_negative_numbers`] is set + pub fn is_allow_negative_numbers_set(&self) -> bool { + self.is_set(ArgSettings::AllowNegativeNumbers) + } + + /// Behavior when parsing the argument + pub fn get_action(&self) -> &super::ArgAction { + const DEFAULT: super::ArgAction = super::ArgAction::Set; + self.action.as_ref().unwrap_or(&DEFAULT) + } + + /// Configured parser for argument values + /// + /// # Example + /// + /// ```rust + /// let cmd = clap::Command::new("raw") + /// .arg( + /// clap::Arg::new("port") + /// .value_parser(clap::value_parser!(usize)) + /// ); + /// let value_parser = cmd.get_arguments() + /// .find(|a| a.get_id() == "port").unwrap() + /// .get_value_parser(); + /// println!("{:?}", value_parser); + /// ``` + pub fn get_value_parser(&self) -> &super::ValueParser { + if let Some(value_parser) = self.value_parser.as_ref() { + value_parser + } else { + static DEFAULT: super::ValueParser = super::ValueParser::string(); + &DEFAULT + } + } + + /// Report whether [`Arg::global`] is set + pub fn is_global_set(&self) -> bool { + self.is_set(ArgSettings::Global) + } + + /// Report whether [`Arg::next_line_help`] is set + pub fn is_next_line_help_set(&self) -> bool { + self.is_set(ArgSettings::NextLineHelp) + } + + /// Report whether [`Arg::hide`] is set + pub fn is_hide_set(&self) -> bool { + self.is_set(ArgSettings::Hidden) + } + + /// Report whether [`Arg::hide_default_value`] is set + pub fn is_hide_default_value_set(&self) -> bool { + self.is_set(ArgSettings::HideDefaultValue) + } + + /// Report whether [`Arg::hide_possible_values`] is set + pub fn is_hide_possible_values_set(&self) -> bool { + self.is_set(ArgSettings::HidePossibleValues) + } + + /// Report whether [`Arg::hide_env`] is set + #[cfg(feature = "env")] + pub fn is_hide_env_set(&self) -> bool { + self.is_set(ArgSettings::HideEnv) + } + + /// Report whether [`Arg::hide_env_values`] is set + #[cfg(feature = "env")] + pub fn is_hide_env_values_set(&self) -> bool { + self.is_set(ArgSettings::HideEnvValues) + } + + /// Report whether [`Arg::hide_short_help`] is set + pub fn is_hide_short_help_set(&self) -> bool { + self.is_set(ArgSettings::HiddenShortHelp) + } + + /// Report whether [`Arg::hide_long_help`] is set + pub fn is_hide_long_help_set(&self) -> bool { + self.is_set(ArgSettings::HiddenLongHelp) + } + + /// Report whether [`Arg::require_equals`] is set + pub fn is_require_equals_set(&self) -> bool { + self.is_set(ArgSettings::RequireEquals) + } + + /// Reports whether [`Arg::exclusive`] is set + pub fn is_exclusive_set(&self) -> bool { + self.is_set(ArgSettings::Exclusive) + } + + /// Report whether [`Arg::trailing_var_arg`] is set + pub fn is_trailing_var_arg_set(&self) -> bool { + self.is_set(ArgSettings::TrailingVarArg) + } + + /// Reports whether [`Arg::last`] is set + pub fn is_last_set(&self) -> bool { + self.is_set(ArgSettings::Last) + } + + /// Reports whether [`Arg::ignore_case`] is set + pub fn is_ignore_case_set(&self) -> bool { + self.is_set(ArgSettings::IgnoreCase) + } +} + +/// # Internally used only +impl Arg { + pub(crate) fn _build(&mut self) { + if self.action.is_none() { + if self.num_vals == Some(ValueRange::EMPTY) { + let action = super::ArgAction::SetTrue; + self.action = Some(action); + } else { + let action = + if self.is_positional() && self.num_vals.unwrap_or_default().is_unbounded() { + // Allow collecting arguments interleaved with flags + // + // Bounded values are probably a group and the user should explicitly opt-in to + // Append + super::ArgAction::Append + } else { + super::ArgAction::Set + }; + self.action = Some(action); + } + } + if let Some(action) = self.action.as_ref() { + if let Some(default_value) = action.default_value() { + if self.default_vals.is_empty() { + self.default_vals = vec![default_value.into()]; + } + } + if let Some(default_value) = action.default_missing_value() { + if self.default_missing_vals.is_empty() { + self.default_missing_vals = vec![default_value.into()]; + } + } + } + + if self.value_parser.is_none() { + if let Some(default) = self.action.as_ref().and_then(|a| a.default_value_parser()) { + self.value_parser = Some(default); + } else { + self.value_parser = Some(super::ValueParser::string()); + } + } + + let val_names_len = self.val_names.len(); + if val_names_len > 1 { + self.num_vals.get_or_insert(val_names_len.into()); + } else { + let nargs = if self.get_action().takes_values() { + ValueRange::SINGLE + } else { + ValueRange::EMPTY + }; + self.num_vals.get_or_insert(nargs); + } + } + + // Used for positionals when printing + pub(crate) fn name_no_brackets(&self) -> String { + debug!("Arg::name_no_brackets:{}", self.get_id()); + let delim = " "; + if !self.val_names.is_empty() { + debug!("Arg::name_no_brackets: val_names={:#?}", self.val_names); + + if self.val_names.len() > 1 { + self.val_names + .iter() + .map(|n| format!("<{}>", n)) + .collect::<Vec<_>>() + .join(delim) + } else { + self.val_names + .first() + .expect(INTERNAL_ERROR_MSG) + .as_str() + .to_owned() + } + } else { + debug!("Arg::name_no_brackets: just name"); + self.get_id().as_str().to_owned() + } + } + + pub(crate) fn stylized(&self, required: Option<bool>) -> StyledStr { + let mut styled = StyledStr::new(); + // Write the name such --long or -l + if let Some(l) = self.get_long() { + styled.literal("--"); + styled.literal(l); + } else if let Some(s) = self.get_short() { + styled.literal("-"); + styled.literal(s); + } + styled.extend(self.stylize_arg_suffix(required).into_iter()); + styled + } + + pub(crate) fn stylize_arg_suffix(&self, required: Option<bool>) -> StyledStr { + let mut styled = StyledStr::new(); + + let mut need_closing_bracket = false; + if self.is_takes_value_set() && !self.is_positional() { + let is_optional_val = self.get_min_vals() == 0; + if self.is_require_equals_set() { + if is_optional_val { + need_closing_bracket = true; + styled.placeholder("[="); + } else { + styled.literal("="); + } + } else if is_optional_val { + need_closing_bracket = true; + styled.placeholder(" ["); + } else { + styled.placeholder(" "); + } + } + if self.is_takes_value_set() || self.is_positional() { + let required = required.unwrap_or_else(|| self.is_required_set()); + let arg_val = self.render_arg_val(required); + styled.placeholder(arg_val); + } else if matches!(*self.get_action(), ArgAction::Count) { + styled.placeholder("..."); + } + if need_closing_bracket { + styled.placeholder("]"); + } + + styled + } + + /// Write the values such as `<name1> <name2>` + fn render_arg_val(&self, required: bool) -> String { + let mut rendered = String::new(); + + let num_vals = self.get_num_args().unwrap_or_else(|| 1.into()); + + let mut val_names = if self.val_names.is_empty() { + vec![self.id.as_internal_str().to_owned()] + } else { + self.val_names.clone() + }; + if val_names.len() == 1 { + let min = num_vals.min_values().max(1); + let val_name = val_names.pop().unwrap(); + val_names = vec![val_name; min]; + } + + debug_assert!(self.is_takes_value_set()); + for (n, val_name) in val_names.iter().enumerate() { + let arg_name = if self.is_positional() && (num_vals.min_values() == 0 || !required) { + format!("[{}]", val_name) + } else { + format!("<{}>", val_name) + }; + + if n != 0 { + rendered.push(' '); + } + rendered.push_str(&arg_name); + } + + let mut extra_values = false; + extra_values |= val_names.len() < num_vals.max_values(); + if self.is_positional() && matches!(*self.get_action(), ArgAction::Append) { + extra_values = true; + } + if extra_values { + rendered.push_str("..."); + } + + rendered + } + + /// Either multiple values or occurrences + pub(crate) fn is_multiple(&self) -> bool { + self.is_multiple_values_set() || matches!(*self.get_action(), ArgAction::Append) + } + + #[cfg(feature = "help")] + pub(crate) fn get_display_order(&self) -> usize { + self.disp_ord.unwrap_or(999) + } +} + +impl From<&'_ Arg> for Arg { + fn from(a: &Arg) -> Self { + a.clone() + } +} + +impl PartialEq for Arg { + fn eq(&self, other: &Arg) -> bool { + self.get_id() == other.get_id() + } +} + +impl PartialOrd for Arg { + fn partial_cmp(&self, other: &Self) -> Option<Ordering> { + Some(self.cmp(other)) + } +} + +impl Ord for Arg { + fn cmp(&self, other: &Arg) -> Ordering { + self.get_id().cmp(other.get_id()) + } +} + +impl Eq for Arg {} + +impl Display for Arg { + fn fmt(&self, f: &mut Formatter) -> fmt::Result { + self.stylized(None).fmt(f) + } +} + +impl fmt::Debug for Arg { + fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> { + let mut ds = f.debug_struct("Arg"); + + #[allow(unused_mut)] + let mut ds = ds + .field("id", &self.id) + .field("help", &self.help) + .field("long_help", &self.long_help) + .field("action", &self.action) + .field("value_parser", &self.value_parser) + .field("blacklist", &self.blacklist) + .field("settings", &self.settings) + .field("overrides", &self.overrides) + .field("groups", &self.groups) + .field("requires", &self.requires) + .field("r_ifs", &self.r_ifs) + .field("r_unless", &self.r_unless) + .field("short", &self.short) + .field("long", &self.long) + .field("aliases", &self.aliases) + .field("short_aliases", &self.short_aliases) + .field("disp_ord", &self.disp_ord) + .field("val_names", &self.val_names) + .field("num_vals", &self.num_vals) + .field("val_delim", &self.val_delim) + .field("default_vals", &self.default_vals) + .field("default_vals_ifs", &self.default_vals_ifs) + .field("terminator", &self.terminator) + .field("index", &self.index) + .field("help_heading", &self.help_heading) + .field("value_hint", &self.value_hint) + .field("default_missing_vals", &self.default_missing_vals); + + #[cfg(feature = "env")] + { + ds = ds.field("env", &self.env); + } + + ds.finish() + } +} + +// Flags +#[cfg(test)] +mod test { + use super::Arg; + use super::ArgAction; + + #[test] + fn flag_display_long() { + let mut f = Arg::new("flg").long("flag").action(ArgAction::SetTrue); + f._build(); + + assert_eq!(f.to_string(), "--flag"); + } + + #[test] + fn flag_display_short() { + let mut f2 = Arg::new("flg").short('f').action(ArgAction::SetTrue); + f2._build(); + + assert_eq!(f2.to_string(), "-f"); + } + + #[test] + fn flag_display_count() { + let mut f2 = Arg::new("flg").long("flag").action(ArgAction::Count); + f2._build(); + + assert_eq!(f2.to_string(), "--flag..."); + } + + #[test] + fn flag_display_single_alias() { + let mut f = Arg::new("flg") + .long("flag") + .visible_alias("als") + .action(ArgAction::SetTrue); + f._build(); + + assert_eq!(f.to_string(), "--flag") + } + + #[test] + fn flag_display_multiple_aliases() { + let mut f = Arg::new("flg").short('f').action(ArgAction::SetTrue); + f.aliases = vec![ + ("alias_not_visible".into(), false), + ("f2".into(), true), + ("f3".into(), true), + ("f4".into(), true), + ]; + f._build(); + + assert_eq!(f.to_string(), "-f"); + } + + #[test] + fn flag_display_single_short_alias() { + let mut f = Arg::new("flg").short('a').action(ArgAction::SetTrue); + f.short_aliases = vec![('b', true)]; + f._build(); + + assert_eq!(f.to_string(), "-a") + } + + #[test] + fn flag_display_multiple_short_aliases() { + let mut f = Arg::new("flg").short('a').action(ArgAction::SetTrue); + f.short_aliases = vec![('b', false), ('c', true), ('d', true), ('e', true)]; + f._build(); + + assert_eq!(f.to_string(), "-a"); + } + + // Options + + #[test] + fn option_display_multiple_occurrences() { + let mut o = Arg::new("opt").long("option").action(ArgAction::Append); + o._build(); + + assert_eq!(o.to_string(), "--option <opt>"); + } + + #[test] + fn option_display_multiple_values() { + let mut o = Arg::new("opt") + .long("option") + .action(ArgAction::Set) + .num_args(1..); + o._build(); + + assert_eq!(o.to_string(), "--option <opt>..."); + } + + #[test] + fn option_display_zero_or_more_values() { + let mut o = Arg::new("opt") + .long("option") + .action(ArgAction::Set) + .num_args(0..); + o._build(); + + assert_eq!(o.to_string(), "--option [<opt>...]"); + } + + #[test] + fn option_display_one_or_more_values() { + let mut o = Arg::new("opt") + .long("option") + .action(ArgAction::Set) + .num_args(1..); + o._build(); + + assert_eq!(o.to_string(), "--option <opt>..."); + } + + #[test] + fn option_display_zero_or_more_values_with_value_name() { + let mut o = Arg::new("opt") + .short('o') + .action(ArgAction::Set) + .num_args(0..) + .value_names(["file"]); + o._build(); + + assert_eq!(o.to_string(), "-o [<file>...]"); + } + + #[test] + fn option_display_one_or_more_values_with_value_name() { + let mut o = Arg::new("opt") + .short('o') + .action(ArgAction::Set) + .num_args(1..) + .value_names(["file"]); + o._build(); + + assert_eq!(o.to_string(), "-o <file>..."); + } + + #[test] + fn option_display_optional_value() { + let mut o = Arg::new("opt") + .long("option") + .action(ArgAction::Set) + .num_args(0..=1); + o._build(); + + assert_eq!(o.to_string(), "--option [<opt>]"); + } + + #[test] + fn option_display_value_names() { + let mut o = Arg::new("opt") + .short('o') + .action(ArgAction::Set) + .value_names(["file", "name"]); + o._build(); + + assert_eq!(o.to_string(), "-o <file> <name>"); + } + + #[test] + fn option_display3() { + let mut o = Arg::new("opt") + .short('o') + .num_args(1..) + .action(ArgAction::Set) + .value_names(["file", "name"]); + o._build(); + + assert_eq!(o.to_string(), "-o <file> <name>..."); + } + + #[test] + fn option_display_single_alias() { + let mut o = Arg::new("opt") + .long("option") + .action(ArgAction::Set) + .visible_alias("als"); + o._build(); + + assert_eq!(o.to_string(), "--option <opt>"); + } + + #[test] + fn option_display_multiple_aliases() { + let mut o = Arg::new("opt") + .long("option") + .action(ArgAction::Set) + .visible_aliases(["als2", "als3", "als4"]) + .alias("als_not_visible"); + o._build(); + + assert_eq!(o.to_string(), "--option <opt>"); + } + + #[test] + fn option_display_single_short_alias() { + let mut o = Arg::new("opt") + .short('a') + .action(ArgAction::Set) + .visible_short_alias('b'); + o._build(); + + assert_eq!(o.to_string(), "-a <opt>"); + } + + #[test] + fn option_display_multiple_short_aliases() { + let mut o = Arg::new("opt") + .short('a') + .action(ArgAction::Set) + .visible_short_aliases(['b', 'c', 'd']) + .short_alias('e'); + o._build(); + + assert_eq!(o.to_string(), "-a <opt>"); + } + + // Positionals + + #[test] + fn positional_display_multiple_values() { + let mut p = Arg::new("pos").index(1).num_args(1..); + p._build(); + + assert_eq!(p.to_string(), "[pos]..."); + } + + #[test] + fn positional_display_multiple_values_required() { + let mut p = Arg::new("pos").index(1).num_args(1..).required(true); + p._build(); + + assert_eq!(p.to_string(), "<pos>..."); + } + + #[test] + fn positional_display_zero_or_more_values() { + let mut p = Arg::new("pos").index(1).num_args(0..); + p._build(); + + assert_eq!(p.to_string(), "[pos]..."); + } + + #[test] + fn positional_display_one_or_more_values() { + let mut p = Arg::new("pos").index(1).num_args(1..); + p._build(); + + assert_eq!(p.to_string(), "[pos]..."); + } + + #[test] + fn positional_display_one_or_more_values_required() { + let mut p = Arg::new("pos").index(1).num_args(1..).required(true); + p._build(); + + assert_eq!(p.to_string(), "<pos>..."); + } + + #[test] + fn positional_display_optional_value() { + let mut p = Arg::new("pos") + .index(1) + .num_args(0..=1) + .action(ArgAction::Set); + p._build(); + + assert_eq!(p.to_string(), "[pos]"); + } + + #[test] + fn positional_display_multiple_occurrences() { + let mut p = Arg::new("pos").index(1).action(ArgAction::Append); + p._build(); + + assert_eq!(p.to_string(), "[pos]..."); + } + + #[test] + fn positional_display_multiple_occurrences_required() { + let mut p = Arg::new("pos") + .index(1) + .action(ArgAction::Append) + .required(true); + p._build(); + + assert_eq!(p.to_string(), "<pos>..."); + } + + #[test] + fn positional_display_required() { + let mut p = Arg::new("pos").index(1).required(true); + p._build(); + + assert_eq!(p.to_string(), "<pos>"); + } + + #[test] + fn positional_display_val_names() { + let mut p = Arg::new("pos").index(1).value_names(["file1", "file2"]); + p._build(); + + assert_eq!(p.to_string(), "[file1] [file2]"); + } + + #[test] + fn positional_display_val_names_required() { + let mut p = Arg::new("pos") + .index(1) + .value_names(["file1", "file2"]) + .required(true); + p._build(); + + assert_eq!(p.to_string(), "<file1> <file2>"); + } + + #[test] + fn positional_display_val_names_req() { + let mut p = Arg::new("pos") + .index(1) + .required(true) + .value_names(["file1", "file2"]); + p._build(); + + assert_eq!(p.to_string(), "<file1> <file2>"); + } +} diff --git a/vendor/clap/src/builder/arg_group.rs b/vendor/clap/src/builder/arg_group.rs new file mode 100644 index 000000000..a6386a1c0 --- /dev/null +++ b/vendor/clap/src/builder/arg_group.rs @@ -0,0 +1,596 @@ +// Internal +use crate::builder::IntoResettable; +use crate::util::Id; + +/// Family of related [arguments]. +/// +/// By placing arguments in a logical group, you can create easier requirement and +/// exclusion rules instead of having to list each argument individually, or when you want a rule +/// to apply "any but not all" arguments. +/// +/// For instance, you can make an entire `ArgGroup` required. If [`ArgGroup::multiple(true)`] is +/// set, this means that at least one argument from that group must be present. If +/// [`ArgGroup::multiple(false)`] is set (the default), one and *only* one must be present. +/// +/// You can also do things such as name an entire `ArgGroup` as a [conflict] or [requirement] for +/// another argument, meaning any of the arguments that belong to that group will cause a failure +/// if present, or must be present respectively. +/// +/// Perhaps the most common use of `ArgGroup`s is to require one and *only* one argument to be +/// present out of a given set. Imagine that you had multiple arguments, and you want one of them +/// to be required, but making all of them required isn't feasible because perhaps they conflict +/// with each other. For example, lets say that you were building an application where one could +/// set a given version number by supplying a string with an option argument, i.e. +/// `--set-ver v1.2.3`, you also wanted to support automatically using a previous version number +/// and simply incrementing one of the three numbers. So you create three flags `--major`, +/// `--minor`, and `--patch`. All of these arguments shouldn't be used at one time but you want to +/// specify that *at least one* of them is used. For this, you can create a group. +/// +/// Finally, you may use `ArgGroup`s to pull a value from a group of arguments when you don't care +/// exactly which argument was actually used at runtime. +/// +/// # Examples +/// +/// The following example demonstrates using an `ArgGroup` to ensure that one, and only one, of +/// the arguments from the specified group is present at runtime. +/// +/// ```rust +/// # use clap::{Command, arg, ArgGroup, error::ErrorKind}; +/// let result = Command::new("cmd") +/// .arg(arg!(--"set-ver" <ver> "set the version manually")) +/// .arg(arg!(--major "auto increase major")) +/// .arg(arg!(--minor "auto increase minor")) +/// .arg(arg!(--patch "auto increase patch")) +/// .group(ArgGroup::new("vers") +/// .args(["set-ver", "major", "minor", "patch"]) +/// .required(true)) +/// .try_get_matches_from(vec!["cmd", "--major", "--patch"]); +/// // Because we used two args in the group it's an error +/// assert!(result.is_err()); +/// let err = result.unwrap_err(); +/// assert_eq!(err.kind(), ErrorKind::ArgumentConflict); +/// ``` +/// +/// This next example shows a passing parse of the same scenario +/// ```rust +/// # use clap::{Command, arg, ArgGroup, Id}; +/// let result = Command::new("cmd") +/// .arg(arg!(--"set-ver" <ver> "set the version manually")) +/// .arg(arg!(--major "auto increase major")) +/// .arg(arg!(--minor "auto increase minor")) +/// .arg(arg!(--patch "auto increase patch")) +/// .group(ArgGroup::new("vers") +/// .args(["set-ver", "major", "minor","patch"]) +/// .required(true)) +/// .try_get_matches_from(vec!["cmd", "--major"]); +/// assert!(result.is_ok()); +/// let matches = result.unwrap(); +/// // We may not know which of the args was used, so we can test for the group... +/// assert!(matches.contains_id("vers")); +/// // We can also ask the group which arg was used +/// assert_eq!(matches +/// .get_one::<Id>("vers") +/// .expect("`vers` is required") +/// .as_str(), +/// "major" +/// ); +/// // we could also alternatively check each arg individually (not shown here) +/// ``` +/// [`ArgGroup::multiple(true)`]: ArgGroup::multiple() +/// +/// [`ArgGroup::multiple(false)`]: ArgGroup::multiple() +/// [arguments]: crate::Arg +/// [conflict]: crate::Arg::conflicts_with() +/// [requirement]: crate::Arg::requires() +#[derive(Default, Clone, Debug, PartialEq, Eq)] +pub struct ArgGroup { + pub(crate) id: Id, + pub(crate) args: Vec<Id>, + pub(crate) required: bool, + pub(crate) requires: Vec<Id>, + pub(crate) conflicts: Vec<Id>, + pub(crate) multiple: bool, +} + +/// # Builder +impl ArgGroup { + /// Create a `ArgGroup` using a unique name. + /// + /// The name will be used to get values from the group or refer to the group inside of conflict + /// and requirement rules. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, ArgGroup}; + /// ArgGroup::new("config") + /// # ; + /// ``` + pub fn new(id: impl Into<Id>) -> Self { + ArgGroup::default().id(id) + } + + /// Sets the group name. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, ArgGroup}; + /// ArgGroup::default().id("config") + /// # ; + /// ``` + #[must_use] + pub fn id(mut self, id: impl Into<Id>) -> Self { + self.id = id.into(); + self + } + + /// Adds an [argument] to this group by name + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgGroup, ArgAction}; + /// let m = Command::new("myprog") + /// .arg(Arg::new("flag") + /// .short('f') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("color") + /// .short('c') + /// .action(ArgAction::SetTrue)) + /// .group(ArgGroup::new("req_flags") + /// .arg("flag") + /// .arg("color")) + /// .get_matches_from(vec!["myprog", "-f"]); + /// // maybe we don't know which of the two flags was used... + /// assert!(m.contains_id("req_flags")); + /// // but we can also check individually if needed + /// assert!(m.contains_id("flag")); + /// ``` + /// [argument]: crate::Arg + #[must_use] + pub fn arg(mut self, arg_id: impl IntoResettable<Id>) -> Self { + if let Some(arg_id) = arg_id.into_resettable().into_option() { + self.args.push(arg_id); + } else { + self.args.clear(); + } + self + } + + /// Adds multiple [arguments] to this group by name + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgGroup, ArgAction}; + /// let m = Command::new("myprog") + /// .arg(Arg::new("flag") + /// .short('f') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("color") + /// .short('c') + /// .action(ArgAction::SetTrue)) + /// .group(ArgGroup::new("req_flags") + /// .args(["flag", "color"])) + /// .get_matches_from(vec!["myprog", "-f"]); + /// // maybe we don't know which of the two flags was used... + /// assert!(m.contains_id("req_flags")); + /// // but we can also check individually if needed + /// assert!(m.contains_id("flag")); + /// ``` + /// [arguments]: crate::Arg + #[must_use] + pub fn args(mut self, ns: impl IntoIterator<Item = impl Into<Id>>) -> Self { + for n in ns { + self = self.arg(n); + } + self + } + + /// Getters for all args. It will return a vector of `Id` + /// + /// # Example + /// + /// ```rust + /// # use clap::{ArgGroup}; + /// let args: Vec<&str> = vec!["a1".into(), "a4".into()]; + /// let grp = ArgGroup::new("program").args(&args); + /// + /// for (pos, arg) in grp.get_args().enumerate() { + /// assert_eq!(*arg, args[pos]); + /// } + /// ``` + pub fn get_args(&self) -> impl Iterator<Item = &Id> { + self.args.iter() + } + + /// Allows more than one of the [`Arg`]s in this group to be used. (Default: `false`) + /// + /// # Examples + /// + /// Notice in this example we use *both* the `-f` and `-c` flags which are both part of the + /// group + /// + /// ```rust + /// # use clap::{Command, Arg, ArgGroup, ArgAction}; + /// let m = Command::new("myprog") + /// .arg(Arg::new("flag") + /// .short('f') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("color") + /// .short('c') + /// .action(ArgAction::SetTrue)) + /// .group(ArgGroup::new("req_flags") + /// .args(["flag", "color"]) + /// .multiple(true)) + /// .get_matches_from(vec!["myprog", "-f", "-c"]); + /// // maybe we don't know which of the two flags was used... + /// assert!(m.contains_id("req_flags")); + /// ``` + /// In this next example, we show the default behavior (i.e. `multiple(false)) which will throw + /// an error if more than one of the args in the group was used. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgGroup, error::ErrorKind, ArgAction}; + /// let result = Command::new("myprog") + /// .arg(Arg::new("flag") + /// .short('f') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("color") + /// .short('c') + /// .action(ArgAction::SetTrue)) + /// .group(ArgGroup::new("req_flags") + /// .args(["flag", "color"])) + /// .try_get_matches_from(vec!["myprog", "-f", "-c"]); + /// // Because we used both args in the group it's an error + /// assert!(result.is_err()); + /// let err = result.unwrap_err(); + /// assert_eq!(err.kind(), ErrorKind::ArgumentConflict); + /// ``` + /// + /// [`Arg`]: crate::Arg + #[inline] + #[must_use] + pub fn multiple(mut self, yes: bool) -> Self { + self.multiple = yes; + self + } + + /// Return true if the group allows more than one of the arguments + /// in this group to be used. (Default: `false`) + /// + /// # Example + /// + /// ```rust + /// # use clap::{ArgGroup}; + /// let mut group = ArgGroup::new("myprog") + /// .args(["f", "c"]) + /// .multiple(true); + /// + /// assert!(group.is_multiple()); + /// ``` + pub fn is_multiple(&mut self) -> bool { + self.multiple + } + + /// Require an argument from the group to be present when parsing. + /// + /// This is unless conflicting with another argument. A required group will be displayed in + /// the usage string of the application in the format `<arg|arg2|arg3>`. + /// + /// **NOTE:** This setting only applies to the current [`Command`] / [`Subcommand`]s, and not + /// globally. + /// + /// **NOTE:** By default, [`ArgGroup::multiple`] is set to `false` which when combined with + /// `ArgGroup::required(true)` states, "One and *only one* arg must be used from this group. + /// Use of more than one arg is an error." Vice setting `ArgGroup::multiple(true)` which + /// states, '*At least* one arg from this group must be used. Using multiple is OK." + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgGroup, error::ErrorKind, ArgAction}; + /// let result = Command::new("myprog") + /// .arg(Arg::new("flag") + /// .short('f') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("color") + /// .short('c') + /// .action(ArgAction::SetTrue)) + /// .group(ArgGroup::new("req_flags") + /// .args(["flag", "color"]) + /// .required(true)) + /// .try_get_matches_from(vec!["myprog"]); + /// // Because we didn't use any of the args in the group, it's an error + /// assert!(result.is_err()); + /// let err = result.unwrap_err(); + /// assert_eq!(err.kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// + /// [`Subcommand`]: crate::Subcommand + /// [`ArgGroup::multiple`]: ArgGroup::multiple() + /// [`Command`]: crate::Command + #[inline] + #[must_use] + pub fn required(mut self, yes: bool) -> Self { + self.required = yes; + self + } + + /// Specify an argument or group that must be present when this group is. + /// + /// This is not to be confused with a [required group]. Requirement rules function just like + /// [argument requirement rules], you can name other arguments or groups that must be present + /// when any one of the arguments from this group is used. + /// + /// **NOTE:** The name provided may be an argument or group name + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgGroup, error::ErrorKind, ArgAction}; + /// let result = Command::new("myprog") + /// .arg(Arg::new("flag") + /// .short('f') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("color") + /// .short('c') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("debug") + /// .short('d') + /// .action(ArgAction::SetTrue)) + /// .group(ArgGroup::new("req_flags") + /// .args(["flag", "color"]) + /// .requires("debug")) + /// .try_get_matches_from(vec!["myprog", "-c"]); + /// // because we used an arg from the group, and the group requires "-d" to be used, it's an + /// // error + /// assert!(result.is_err()); + /// let err = result.unwrap_err(); + /// assert_eq!(err.kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [required group]: ArgGroup::required() + /// [argument requirement rules]: crate::Arg::requires() + #[must_use] + pub fn requires(mut self, id: impl IntoResettable<Id>) -> Self { + if let Some(id) = id.into_resettable().into_option() { + self.requires.push(id); + } else { + self.requires.clear(); + } + self + } + + /// Specify arguments or groups that must be present when this group is. + /// + /// This is not to be confused with a [required group]. Requirement rules function just like + /// [argument requirement rules], you can name other arguments or groups that must be present + /// when one of the arguments from this group is used. + /// + /// **NOTE:** The names provided may be an argument or group name + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgGroup, error::ErrorKind, ArgAction}; + /// let result = Command::new("myprog") + /// .arg(Arg::new("flag") + /// .short('f') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("color") + /// .short('c') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("debug") + /// .short('d') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("verb") + /// .short('v') + /// .action(ArgAction::SetTrue)) + /// .group(ArgGroup::new("req_flags") + /// .args(["flag", "color"]) + /// .requires_all(["debug", "verb"])) + /// .try_get_matches_from(vec!["myprog", "-c", "-d"]); + /// // because we used an arg from the group, and the group requires "-d" and "-v" to be used, + /// // yet we only used "-d" it's an error + /// assert!(result.is_err()); + /// let err = result.unwrap_err(); + /// assert_eq!(err.kind(), ErrorKind::MissingRequiredArgument); + /// ``` + /// [required group]: ArgGroup::required() + /// [argument requirement rules]: crate::Arg::requires_ifs() + #[must_use] + pub fn requires_all(mut self, ns: impl IntoIterator<Item = impl Into<Id>>) -> Self { + for n in ns { + self = self.requires(n); + } + self + } + + /// Specify an argument or group that must **not** be present when this group is. + /// + /// Exclusion (aka conflict) rules function just like [argument exclusion rules], you can name + /// other arguments or groups that must *not* be present when one of the arguments from this + /// group are used. + /// + /// **NOTE:** The name provided may be an argument, or group name + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgGroup, error::ErrorKind, ArgAction}; + /// let result = Command::new("myprog") + /// .arg(Arg::new("flag") + /// .short('f') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("color") + /// .short('c') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("debug") + /// .short('d') + /// .action(ArgAction::SetTrue)) + /// .group(ArgGroup::new("req_flags") + /// .args(["flag", "color"]) + /// .conflicts_with("debug")) + /// .try_get_matches_from(vec!["myprog", "-c", "-d"]); + /// // because we used an arg from the group, and the group conflicts with "-d", it's an error + /// assert!(result.is_err()); + /// let err = result.unwrap_err(); + /// assert_eq!(err.kind(), ErrorKind::ArgumentConflict); + /// ``` + /// [argument exclusion rules]: crate::Arg::conflicts_with() + #[must_use] + pub fn conflicts_with(mut self, id: impl IntoResettable<Id>) -> Self { + if let Some(id) = id.into_resettable().into_option() { + self.conflicts.push(id); + } else { + self.conflicts.clear(); + } + self + } + + /// Specify arguments or groups that must **not** be present when this group is. + /// + /// Exclusion rules function just like [argument exclusion rules], you can name other arguments + /// or groups that must *not* be present when one of the arguments from this group are used. + /// + /// **NOTE:** The names provided may be an argument, or group name + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgGroup, error::ErrorKind, ArgAction}; + /// let result = Command::new("myprog") + /// .arg(Arg::new("flag") + /// .short('f') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("color") + /// .short('c') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("debug") + /// .short('d') + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("verb") + /// .short('v') + /// .action(ArgAction::SetTrue)) + /// .group(ArgGroup::new("req_flags") + /// .args(["flag", "color"]) + /// .conflicts_with_all(["debug", "verb"])) + /// .try_get_matches_from(vec!["myprog", "-c", "-v"]); + /// // because we used an arg from the group, and the group conflicts with either "-v" or "-d" + /// // it's an error + /// assert!(result.is_err()); + /// let err = result.unwrap_err(); + /// assert_eq!(err.kind(), ErrorKind::ArgumentConflict); + /// ``` + /// + /// [argument exclusion rules]: crate::Arg::conflicts_with_all() + #[must_use] + pub fn conflicts_with_all(mut self, ns: impl IntoIterator<Item = impl Into<Id>>) -> Self { + for n in ns { + self = self.conflicts_with(n); + } + self + } +} + +/// # Reflection +impl ArgGroup { + /// Get the name of the group + #[inline] + pub fn get_id(&self) -> &Id { + &self.id + } + + /// Reports whether [`ArgGroup::required`] is set + #[inline] + pub fn is_required_set(&self) -> bool { + self.required + } +} + +impl From<&'_ ArgGroup> for ArgGroup { + fn from(g: &ArgGroup) -> Self { + g.clone() + } +} + +#[cfg(test)] +mod test { + use super::*; + + #[test] + fn groups() { + let g = ArgGroup::new("test") + .arg("a1") + .arg("a4") + .args(["a2", "a3"]) + .required(true) + .conflicts_with("c1") + .conflicts_with_all(["c2", "c3"]) + .conflicts_with("c4") + .requires("r1") + .requires_all(["r2", "r3"]) + .requires("r4"); + + let args: Vec<Id> = vec!["a1".into(), "a4".into(), "a2".into(), "a3".into()]; + let reqs: Vec<Id> = vec!["r1".into(), "r2".into(), "r3".into(), "r4".into()]; + let confs: Vec<Id> = vec!["c1".into(), "c2".into(), "c3".into(), "c4".into()]; + + assert_eq!(g.args, args); + assert_eq!(g.requires, reqs); + assert_eq!(g.conflicts, confs); + } + + #[test] + fn test_from() { + let g = ArgGroup::new("test") + .arg("a1") + .arg("a4") + .args(["a2", "a3"]) + .required(true) + .conflicts_with("c1") + .conflicts_with_all(["c2", "c3"]) + .conflicts_with("c4") + .requires("r1") + .requires_all(["r2", "r3"]) + .requires("r4"); + + let args: Vec<Id> = vec!["a1".into(), "a4".into(), "a2".into(), "a3".into()]; + let reqs: Vec<Id> = vec!["r1".into(), "r2".into(), "r3".into(), "r4".into()]; + let confs: Vec<Id> = vec!["c1".into(), "c2".into(), "c3".into(), "c4".into()]; + + let g2 = ArgGroup::from(&g); + assert_eq!(g2.args, args); + assert_eq!(g2.requires, reqs); + assert_eq!(g2.conflicts, confs); + } + + // This test will *fail to compile* if ArgGroup is not Send + Sync + #[test] + fn arg_group_send_sync() { + fn foo<T: Send + Sync>(_: T) {} + foo(ArgGroup::new("test")) + } + + #[test] + fn arg_group_expose_is_multiple_helper() { + let args: Vec<Id> = vec!["a1".into(), "a4".into()]; + + let mut grp_multiple = ArgGroup::new("test_multiple").args(&args).multiple(true); + assert!(grp_multiple.is_multiple()); + + let mut grp_not_multiple = ArgGroup::new("test_multiple").args(&args).multiple(false); + assert!(!grp_not_multiple.is_multiple()); + } + + #[test] + fn arg_group_expose_get_args_helper() { + let args: Vec<Id> = vec!["a1".into(), "a4".into()]; + let grp = ArgGroup::new("program").args(&args); + + for (pos, arg) in grp.get_args().enumerate() { + assert_eq!(*arg, args[pos]); + } + } +} diff --git a/vendor/clap/src/builder/arg_predicate.rs b/vendor/clap/src/builder/arg_predicate.rs new file mode 100644 index 000000000..bc79a11b7 --- /dev/null +++ b/vendor/clap/src/builder/arg_predicate.rs @@ -0,0 +1,19 @@ +use crate::builder::OsStr; + +/// Operations to perform on argument values +/// +/// These do not apply to [`ValueSource::DefaultValue`][crate::parser::ValueSource::DefaultValue] +#[derive(Clone, Debug, PartialEq, Eq)] +#[cfg_attr(feature = "unstable-v5", non_exhaustive)] +pub enum ArgPredicate { + /// Is the argument present? + IsPresent, + /// Does the argument match the specified value? + Equals(OsStr), +} + +impl<S: Into<OsStr>> From<S> for ArgPredicate { + fn from(other: S) -> Self { + Self::Equals(other.into()) + } +} diff --git a/vendor/clap/src/builder/arg_settings.rs b/vendor/clap/src/builder/arg_settings.rs new file mode 100644 index 000000000..0f63e4396 --- /dev/null +++ b/vendor/clap/src/builder/arg_settings.rs @@ -0,0 +1,145 @@ +// Std +use std::ops::BitOr; + +// Third party +use bitflags::bitflags; + +#[allow(unused)] +use crate::Arg; + +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub(crate) struct ArgFlags(Flags); + +impl Default for ArgFlags { + fn default() -> Self { + Self::empty() + } +} + +/// Various settings that apply to arguments and may be set, unset, and checked via getter/setter +/// methods [`Arg::setting`], [`Arg::unset_setting`], and [`Arg::is_set`]. This is what the +/// [`Arg`] methods which accept a `bool` use internally. +/// +/// [`Arg`]: crate::Arg +/// [`Arg::setting`]: crate::Arg::setting() +/// [`Arg::unset_setting`]: crate::Arg::unset_setting() +/// [`Arg::is_set`]: crate::Arg::is_set() +#[derive(Debug, PartialEq, Copy, Clone)] +#[non_exhaustive] +pub(crate) enum ArgSettings { + Required, + Global, + Hidden, + NextLineHelp, + HidePossibleValues, + AllowHyphenValues, + AllowNegativeNumbers, + RequireEquals, + Last, + TrailingVarArg, + HideDefaultValue, + IgnoreCase, + #[cfg(feature = "env")] + HideEnv, + #[cfg(feature = "env")] + HideEnvValues, + HiddenShortHelp, + HiddenLongHelp, + Exclusive, +} + +bitflags! { + struct Flags: u32 { + const REQUIRED = 1; + const GLOBAL = 1 << 3; + const HIDDEN = 1 << 4; + const TRAILING_VARARG = 1 << 5; + const ALLOW_NEG_NUMS = 1 << 6; + const NEXT_LINE_HELP = 1 << 7; + const DELIM_NOT_SET = 1 << 10; + const HIDE_POS_VALS = 1 << 11; + const ALLOW_TAC_VALS = 1 << 12; + const REQUIRE_EQUALS = 1 << 13; + const LAST = 1 << 14; + const HIDE_DEFAULT_VAL = 1 << 15; + const CASE_INSENSITIVE = 1 << 16; + #[cfg(feature = "env")] + const HIDE_ENV_VALS = 1 << 17; + const HIDDEN_SHORT_H = 1 << 18; + const HIDDEN_LONG_H = 1 << 19; + #[cfg(feature = "env")] + const HIDE_ENV = 1 << 21; + const EXCLUSIVE = 1 << 23; + const NO_OP = 0; + } +} + +impl_settings! { ArgSettings, ArgFlags, + Required => Flags::REQUIRED, + Global => Flags::GLOBAL, + Hidden => Flags::HIDDEN, + NextLineHelp => Flags::NEXT_LINE_HELP, + HidePossibleValues => Flags::HIDE_POS_VALS, + AllowHyphenValues => Flags::ALLOW_TAC_VALS, + AllowNegativeNumbers => Flags::ALLOW_NEG_NUMS, + RequireEquals => Flags::REQUIRE_EQUALS, + Last => Flags::LAST, + TrailingVarArg => Flags::TRAILING_VARARG, + IgnoreCase => Flags::CASE_INSENSITIVE, + #[cfg(feature = "env")] + HideEnv => Flags::HIDE_ENV, + #[cfg(feature = "env")] + HideEnvValues => Flags::HIDE_ENV_VALS, + HideDefaultValue => Flags::HIDE_DEFAULT_VAL, + HiddenShortHelp => Flags::HIDDEN_SHORT_H, + HiddenLongHelp => Flags::HIDDEN_LONG_H, + Exclusive => Flags::EXCLUSIVE +} + +#[cfg(test)] +mod test { + use super::*; + use crate::Arg; + + #[test] + fn setting() { + let m = Arg::new("setting").setting(ArgSettings::Required); + assert!(m.is_required_set()); + } + + #[test] + fn unset_setting() { + let m = Arg::new("unset_setting").setting(ArgSettings::Required); + assert!(m.is_required_set()); + + let m = m.unset_setting(ArgSettings::Required); + assert!(!m.is_required_set(), "{:#?}", m); + } + + #[test] + fn setting_bitor() { + let m = Arg::new("setting_bitor") + .setting(ArgSettings::Required | ArgSettings::Hidden | ArgSettings::Last); + + assert!(m.is_required_set()); + assert!(m.is_hide_set()); + assert!(m.is_last_set()); + } + + #[test] + fn unset_setting_bitor() { + let m = Arg::new("unset_setting_bitor") + .setting(ArgSettings::Required) + .setting(ArgSettings::Hidden) + .setting(ArgSettings::Last); + + assert!(m.is_required_set()); + assert!(m.is_hide_set()); + assert!(m.is_last_set()); + + let m = m.unset_setting(ArgSettings::Required | ArgSettings::Hidden | ArgSettings::Last); + assert!(!m.is_required_set(), "{:#?}", m); + assert!(!m.is_hide_set(), "{:#?}", m); + assert!(!m.is_last_set(), "{:#?}", m); + } +} diff --git a/vendor/clap/src/builder/command.rs b/vendor/clap/src/builder/command.rs new file mode 100644 index 000000000..fc2c983e4 --- /dev/null +++ b/vendor/clap/src/builder/command.rs @@ -0,0 +1,4703 @@ +#![cfg_attr(not(feature = "usage"), allow(unused_mut))] + +// Std +use std::env; +use std::ffi::OsString; +use std::fmt; +use std::io; +use std::ops::Index; +use std::path::Path; + +// Internal +use crate::builder::app_settings::{AppFlags, AppSettings}; +use crate::builder::arg_settings::ArgSettings; +use crate::builder::ArgAction; +use crate::builder::IntoResettable; +use crate::builder::PossibleValue; +use crate::builder::Str; +use crate::builder::StyledStr; +use crate::builder::{Arg, ArgGroup, ArgPredicate}; +use crate::error::ErrorKind; +use crate::error::Result as ClapResult; +use crate::mkeymap::MKeyMap; +use crate::output::fmt::Stream; +use crate::output::{fmt::Colorizer, write_help, Usage}; +use crate::parser::{ArgMatcher, ArgMatches, Parser}; +use crate::util::ChildGraph; +use crate::util::FlatMap; +use crate::util::{color::ColorChoice, Id}; +use crate::{Error, INTERNAL_ERROR_MSG}; + +#[cfg(debug_assertions)] +use crate::builder::debug_asserts::assert_app; + +/// Build a command-line interface. +/// +/// This includes defining arguments, subcommands, parser behavior, and help output. +/// Once all configuration is complete, +/// the [`Command::get_matches`] family of methods starts the runtime-parsing +/// process. These methods then return information about the user supplied +/// arguments (or lack thereof). +/// +/// When deriving a [`Parser`][crate::Parser], you can use +/// [`CommandFactory::command`][crate::CommandFactory::command] to access the +/// `Command`. +/// +/// - [Basic API][crate::Command#basic-api] +/// - [Application-wide Settings][crate::Command#application-wide-settings] +/// - [Command-specific Settings][crate::Command#command-specific-settings] +/// - [Subcommand-specific Settings][crate::Command#subcommand-specific-settings] +/// - [Reflection][crate::Command#reflection] +/// +/// # Examples +/// +/// ```no_run +/// # use clap::{Command, Arg}; +/// let m = Command::new("My Program") +/// .author("Me, me@mail.com") +/// .version("1.0.2") +/// .about("Explains in brief what the program does") +/// .arg( +/// Arg::new("in_file") +/// ) +/// .after_help("Longer explanation to appear after the options when \ +/// displaying the help information from --help or -h") +/// .get_matches(); +/// +/// // Your program logic starts here... +/// ``` +/// [`Command::get_matches`]: Command::get_matches() +#[derive(Debug, Clone)] +pub struct Command { + name: Str, + long_flag: Option<Str>, + short_flag: Option<char>, + display_name: Option<String>, + bin_name: Option<String>, + author: Option<Str>, + version: Option<Str>, + long_version: Option<Str>, + about: Option<StyledStr>, + long_about: Option<StyledStr>, + before_help: Option<StyledStr>, + before_long_help: Option<StyledStr>, + after_help: Option<StyledStr>, + after_long_help: Option<StyledStr>, + aliases: Vec<(Str, bool)>, // (name, visible) + short_flag_aliases: Vec<(char, bool)>, // (name, visible) + long_flag_aliases: Vec<(Str, bool)>, // (name, visible) + usage_str: Option<StyledStr>, + usage_name: Option<String>, + help_str: Option<StyledStr>, + disp_ord: Option<usize>, + term_w: Option<usize>, + max_w: Option<usize>, + #[cfg(feature = "help")] + template: Option<StyledStr>, + settings: AppFlags, + g_settings: AppFlags, + args: MKeyMap, + subcommands: Vec<Command>, + replacers: FlatMap<Str, Vec<Str>>, + groups: Vec<ArgGroup>, + current_help_heading: Option<Str>, + current_disp_ord: Option<usize>, + subcommand_value_name: Option<Str>, + subcommand_heading: Option<Str>, + external_value_parser: Option<super::ValueParser>, + long_help_exists: bool, +} + +/// # Basic API +impl Command { + /// Creates a new instance of an `Command`. + /// + /// It is common, but not required, to use binary name as the `name`. This + /// name will only be displayed to the user when they request to print + /// version or help and usage information. + /// + /// See also [`command!`](crate::command!) and [`crate_name!`](crate::crate_name!). + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("My Program") + /// # ; + /// ``` + pub fn new(name: impl Into<Str>) -> Self { + /// The actual implementation of `new`, non-generic to save code size. + /// + /// If we don't do this rustc will unnecessarily generate multiple versions + /// of this code. + fn new_inner(name: Str) -> Command { + Command { + name, + ..Default::default() + } + } + + new_inner(name.into()) + } + + /// Adds an [argument] to the list of valid possibilities. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, arg, Arg}; + /// Command::new("myprog") + /// // Adding a single "flag" argument with a short and help text, using Arg::new() + /// .arg( + /// Arg::new("debug") + /// .short('d') + /// .help("turns on debugging mode") + /// ) + /// // Adding a single "option" argument with a short, a long, and help text using the less + /// // verbose Arg::from() + /// .arg( + /// arg!(-c --config <CONFIG> "Optionally sets a config file to use") + /// ) + /// # ; + /// ``` + /// [argument]: Arg + #[must_use] + pub fn arg(mut self, a: impl Into<Arg>) -> Self { + let arg = a.into(); + self.arg_internal(arg); + self + } + + fn arg_internal(&mut self, mut arg: Arg) { + if let Some(current_disp_ord) = self.current_disp_ord.as_mut() { + if !arg.is_positional() { + let current = *current_disp_ord; + arg.disp_ord.get_or_insert(current); + *current_disp_ord = current + 1; + } + } + + arg.help_heading + .get_or_insert_with(|| self.current_help_heading.clone()); + self.args.push(arg); + } + + /// Adds multiple [arguments] to the list of valid possibilities. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, arg, Arg}; + /// Command::new("myprog") + /// .args([ + /// arg!("[debug] -d 'turns on debugging info'"), + /// Arg::new("input").help("the input file to use") + /// ]) + /// # ; + /// ``` + /// [arguments]: Arg + #[must_use] + pub fn args(mut self, args: impl IntoIterator<Item = impl Into<Arg>>) -> Self { + for arg in args { + self = self.arg(arg); + } + self + } + + /// Allows one to mutate an [`Arg`] after it's been added to a [`Command`]. + /// + /// This can be useful for modifying the auto-generated help or version arguments. + /// + /// # Panics + /// + /// If the argument is undefined + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// + /// let mut cmd = Command::new("foo") + /// .arg(Arg::new("bar") + /// .short('b') + /// .action(ArgAction::SetTrue)) + /// .mut_arg("bar", |a| a.short('B')); + /// + /// let res = cmd.try_get_matches_from_mut(vec!["foo", "-b"]); + /// + /// // Since we changed `bar`'s short to "B" this should err as there + /// // is no `-b` anymore, only `-B` + /// + /// assert!(res.is_err()); + /// + /// let res = cmd.try_get_matches_from_mut(vec!["foo", "-B"]); + /// assert!(res.is_ok()); + /// ``` + #[must_use] + #[cfg_attr(debug_assertions, track_caller)] + pub fn mut_arg<F>(mut self, arg_id: impl AsRef<str>, f: F) -> Self + where + F: FnOnce(Arg) -> Arg, + { + let id = arg_id.as_ref(); + let a = self + .args + .remove_by_name(id) + .unwrap_or_else(|| panic!("Argument `{}` is undefined", id)); + + self.args.push(f(a)); + self + } + + /// Allows one to mutate a [`Command`] after it's been added as a subcommand. + /// + /// This can be useful for modifying auto-generated arguments of nested subcommands with + /// [`Command::mut_arg`]. + /// + /// # Panics + /// + /// If the subcommand is undefined + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// + /// let mut cmd = Command::new("foo") + /// .subcommand(Command::new("bar")) + /// .mut_subcommand("bar", |subcmd| subcmd.disable_help_flag(true)); + /// + /// let res = cmd.try_get_matches_from_mut(vec!["foo", "bar", "--help"]); + /// + /// // Since we disabled the help flag on the "bar" subcommand, this should err. + /// + /// assert!(res.is_err()); + /// + /// let res = cmd.try_get_matches_from_mut(vec!["foo", "bar"]); + /// assert!(res.is_ok()); + /// ``` + #[must_use] + pub fn mut_subcommand<F>(mut self, name: impl AsRef<str>, f: F) -> Self + where + F: FnOnce(Self) -> Self, + { + let name = name.as_ref(); + let pos = self.subcommands.iter().position(|s| s.name == name); + + let subcmd = if let Some(idx) = pos { + self.subcommands.remove(idx) + } else { + panic!("Command `{}` is undefined", name) + }; + + self.subcommands.push(f(subcmd)); + self + } + + /// Adds an [`ArgGroup`] to the application. + /// + /// [`ArgGroup`]s are a family of related arguments. + /// By placing them in a logical group, you can build easier requirement and exclusion rules. + /// + /// Example use cases: + /// - Make an entire [`ArgGroup`] required, meaning that one (and *only* + /// one) argument from that group must be present at runtime. + /// - Name an [`ArgGroup`] as a conflict to another argument. + /// Meaning any of the arguments that belong to that group will cause a failure if present with + /// the conflicting argument. + /// - Ensure exclusion between arguments. + /// - Extract a value from a group instead of determining exactly which argument was used. + /// + /// # Examples + /// + /// The following example demonstrates using an [`ArgGroup`] to ensure that one, and only one, + /// of the arguments from the specified group is present at runtime. + /// + /// ```no_run + /// # use clap::{Command, arg, ArgGroup}; + /// Command::new("cmd") + /// .arg(arg!("--set-ver [ver] 'set the version manually'")) + /// .arg(arg!("--major 'auto increase major'")) + /// .arg(arg!("--minor 'auto increase minor'")) + /// .arg(arg!("--patch 'auto increase patch'")) + /// .group(ArgGroup::new("vers") + /// .args(["set-ver", "major", "minor","patch"]) + /// .required(true)) + /// # ; + /// ``` + #[inline] + #[must_use] + pub fn group(mut self, group: impl Into<ArgGroup>) -> Self { + self.groups.push(group.into()); + self + } + + /// Adds multiple [`ArgGroup`]s to the [`Command`] at once. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, arg, ArgGroup}; + /// Command::new("cmd") + /// .arg(arg!("--set-ver [ver] 'set the version manually'")) + /// .arg(arg!("--major 'auto increase major'")) + /// .arg(arg!("--minor 'auto increase minor'")) + /// .arg(arg!("--patch 'auto increase patch'")) + /// .arg(arg!("-c [FILE] 'a config file'")) + /// .arg(arg!("-i [IFACE] 'an interface'")) + /// .groups([ + /// ArgGroup::new("vers") + /// .args(["set-ver", "major", "minor","patch"]) + /// .required(true), + /// ArgGroup::new("input") + /// .args(["c", "i"]) + /// ]) + /// # ; + /// ``` + #[must_use] + pub fn groups(mut self, groups: impl IntoIterator<Item = impl Into<ArgGroup>>) -> Self { + for g in groups.into_iter() { + self = self.group(g.into()); + } + self + } + + /// Adds a subcommand to the list of valid possibilities. + /// + /// Subcommands are effectively sub-[`Command`]s, because they can contain their own arguments, + /// subcommands, version, usage, etc. They also function just like [`Command`]s, in that they get + /// their own auto generated help, version, and usage. + /// + /// A subcommand's [`Command::name`] will be used for: + /// - The argument the user passes in + /// - Programmatically looking up the subcommand + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, arg}; + /// Command::new("myprog") + /// .subcommand(Command::new("config") + /// .about("Controls configuration features") + /// .arg(arg!("<config> 'Required configuration file to use'"))) + /// # ; + /// ``` + #[inline] + #[must_use] + pub fn subcommand(self, subcmd: impl Into<Command>) -> Self { + let subcmd = subcmd.into(); + self.subcommand_internal(subcmd) + } + + fn subcommand_internal(mut self, mut subcmd: Self) -> Self { + if let Some(current_disp_ord) = self.current_disp_ord.as_mut() { + let current = *current_disp_ord; + subcmd.disp_ord.get_or_insert(current); + *current_disp_ord = current + 1; + } + self.subcommands.push(subcmd); + self + } + + /// Adds multiple subcommands to the list of valid possibilities. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, }; + /// # Command::new("myprog") + /// .subcommands( [ + /// Command::new("config").about("Controls configuration functionality") + /// .arg(Arg::new("config_file")), + /// Command::new("debug").about("Controls debug functionality")]) + /// # ; + /// ``` + /// [`IntoIterator`]: std::iter::IntoIterator + #[must_use] + pub fn subcommands(mut self, subcmds: impl IntoIterator<Item = impl Into<Self>>) -> Self { + for subcmd in subcmds { + self = self.subcommand(subcmd); + } + self + } + + /// Catch problems earlier in the development cycle. + /// + /// Most error states are handled as asserts under the assumption they are programming mistake + /// and not something to handle at runtime. Rather than relying on tests (manual or automated) + /// that exhaustively test your CLI to ensure the asserts are evaluated, this will run those + /// asserts in a way convenient for running as a test. + /// + /// **Note::** This will not help with asserts in [`ArgMatches`], those will need exhaustive + /// testing of your CLI. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// fn cmd() -> Command { + /// Command::new("foo") + /// .arg( + /// Arg::new("bar").short('b').action(ArgAction::SetTrue) + /// ) + /// } + /// + /// #[test] + /// fn verify_app() { + /// cmd().debug_assert(); + /// } + /// + /// fn main() { + /// let m = cmd().get_matches_from(vec!["foo", "-b"]); + /// println!("{}", m.get_flag("bar")); + /// } + /// ``` + pub fn debug_assert(mut self) { + self.build(); + } + + /// Custom error message for post-parsing validation + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, error::ErrorKind}; + /// let mut cmd = Command::new("myprog"); + /// let err = cmd.error(ErrorKind::InvalidValue, "Some failure case"); + /// ``` + pub fn error(&mut self, kind: ErrorKind, message: impl std::fmt::Display) -> Error { + Error::raw(kind, message).format(self) + } + + /// Parse [`env::args_os`], exiting on failure. + /// + /// # Panics + /// + /// If contradictory arguments or settings exist. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// let matches = Command::new("myprog") + /// // Args and options go here... + /// .get_matches(); + /// ``` + /// [`env::args_os`]: std::env::args_os() + /// [`Command::try_get_matches_from_mut`]: Command::try_get_matches_from_mut() + #[inline] + pub fn get_matches(self) -> ArgMatches { + self.get_matches_from(env::args_os()) + } + + /// Parse [`env::args_os`], exiting on failure. + /// + /// Like [`Command::get_matches`] but doesn't consume the `Command`. + /// + /// # Panics + /// + /// If contradictory arguments or settings exist. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// let mut cmd = Command::new("myprog") + /// // Args and options go here... + /// ; + /// let matches = cmd.get_matches_mut(); + /// ``` + /// [`env::args_os`]: std::env::args_os() + /// [`Command::get_matches`]: Command::get_matches() + pub fn get_matches_mut(&mut self) -> ArgMatches { + self.try_get_matches_from_mut(&mut env::args_os()) + .unwrap_or_else(|e| e.exit()) + } + + /// Parse [`env::args_os`], returning a [`clap::Result`] on failure. + /// + /// **NOTE:** This method WILL NOT exit when `--help` or `--version` (or short versions) are + /// used. It will return a [`clap::Error`], where the [`kind`] is a + /// [`ErrorKind::DisplayHelp`] or [`ErrorKind::DisplayVersion`] respectively. You must call + /// [`Error::exit`] or perform a [`std::process::exit`]. + /// + /// # Panics + /// + /// If contradictory arguments or settings exist. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// let matches = Command::new("myprog") + /// // Args and options go here... + /// .try_get_matches() + /// .unwrap_or_else(|e| e.exit()); + /// ``` + /// [`env::args_os`]: std::env::args_os() + /// [`Error::exit`]: crate::Error::exit() + /// [`std::process::exit`]: std::process::exit() + /// [`clap::Result`]: Result + /// [`clap::Error`]: crate::Error + /// [`kind`]: crate::Error + /// [`ErrorKind::DisplayHelp`]: crate::error::ErrorKind::DisplayHelp + /// [`ErrorKind::DisplayVersion`]: crate::error::ErrorKind::DisplayVersion + #[inline] + pub fn try_get_matches(self) -> ClapResult<ArgMatches> { + // Start the parsing + self.try_get_matches_from(env::args_os()) + } + + /// Parse the specified arguments, exiting on failure. + /// + /// **NOTE:** The first argument will be parsed as the binary name unless + /// [`Command::no_binary_name`] is used. + /// + /// # Panics + /// + /// If contradictory arguments or settings exist. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// let arg_vec = vec!["my_prog", "some", "args", "to", "parse"]; + /// + /// let matches = Command::new("myprog") + /// // Args and options go here... + /// .get_matches_from(arg_vec); + /// ``` + /// [`Command::get_matches`]: Command::get_matches() + /// [`clap::Result`]: Result + /// [`Vec`]: std::vec::Vec + pub fn get_matches_from<I, T>(mut self, itr: I) -> ArgMatches + where + I: IntoIterator<Item = T>, + T: Into<OsString> + Clone, + { + self.try_get_matches_from_mut(itr).unwrap_or_else(|e| { + drop(self); + e.exit() + }) + } + + /// Parse the specified arguments, returning a [`clap::Result`] on failure. + /// + /// **NOTE:** This method WILL NOT exit when `--help` or `--version` (or short versions) are + /// used. It will return a [`clap::Error`], where the [`kind`] is a [`ErrorKind::DisplayHelp`] + /// or [`ErrorKind::DisplayVersion`] respectively. You must call [`Error::exit`] or + /// perform a [`std::process::exit`] yourself. + /// + /// **NOTE:** The first argument will be parsed as the binary name unless + /// [`Command::no_binary_name`] is used. + /// + /// # Panics + /// + /// If contradictory arguments or settings exist. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// let arg_vec = vec!["my_prog", "some", "args", "to", "parse"]; + /// + /// let matches = Command::new("myprog") + /// // Args and options go here... + /// .try_get_matches_from(arg_vec) + /// .unwrap_or_else(|e| e.exit()); + /// ``` + /// [`Command::get_matches_from`]: Command::get_matches_from() + /// [`Command::try_get_matches`]: Command::try_get_matches() + /// [`Error::exit`]: crate::Error::exit() + /// [`std::process::exit`]: std::process::exit() + /// [`clap::Error`]: crate::Error + /// [`Error::exit`]: crate::Error::exit() + /// [`kind`]: crate::Error + /// [`ErrorKind::DisplayHelp`]: crate::error::ErrorKind::DisplayHelp + /// [`ErrorKind::DisplayVersion`]: crate::error::ErrorKind::DisplayVersion + /// [`clap::Result`]: Result + pub fn try_get_matches_from<I, T>(mut self, itr: I) -> ClapResult<ArgMatches> + where + I: IntoIterator<Item = T>, + T: Into<OsString> + Clone, + { + self.try_get_matches_from_mut(itr) + } + + /// Parse the specified arguments, returning a [`clap::Result`] on failure. + /// + /// Like [`Command::try_get_matches_from`] but doesn't consume the `Command`. + /// + /// **NOTE:** This method WILL NOT exit when `--help` or `--version` (or short versions) are + /// used. It will return a [`clap::Error`], where the [`kind`] is a [`ErrorKind::DisplayHelp`] + /// or [`ErrorKind::DisplayVersion`] respectively. You must call [`Error::exit`] or + /// perform a [`std::process::exit`] yourself. + /// + /// **NOTE:** The first argument will be parsed as the binary name unless + /// [`Command::no_binary_name`] is used. + /// + /// # Panics + /// + /// If contradictory arguments or settings exist. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// let arg_vec = vec!["my_prog", "some", "args", "to", "parse"]; + /// + /// let mut cmd = Command::new("myprog"); + /// // Args and options go here... + /// let matches = cmd.try_get_matches_from_mut(arg_vec) + /// .unwrap_or_else(|e| e.exit()); + /// ``` + /// [`Command::try_get_matches_from`]: Command::try_get_matches_from() + /// [`clap::Result`]: Result + /// [`clap::Error`]: crate::Error + /// [`kind`]: crate::Error + pub fn try_get_matches_from_mut<I, T>(&mut self, itr: I) -> ClapResult<ArgMatches> + where + I: IntoIterator<Item = T>, + T: Into<OsString> + Clone, + { + let mut raw_args = clap_lex::RawArgs::new(itr.into_iter()); + let mut cursor = raw_args.cursor(); + + if self.settings.is_set(AppSettings::Multicall) { + if let Some(argv0) = raw_args.next_os(&mut cursor) { + let argv0 = Path::new(&argv0); + if let Some(command) = argv0.file_stem().and_then(|f| f.to_str()) { + // Stop borrowing command so we can get another mut ref to it. + let command = command.to_owned(); + debug!( + "Command::try_get_matches_from_mut: Parsed command {} from argv", + command + ); + + debug!("Command::try_get_matches_from_mut: Reinserting command into arguments so subcommand parser matches it"); + raw_args.insert(&cursor, [&command]); + debug!("Command::try_get_matches_from_mut: Clearing name and bin_name so that displayed command name starts with applet name"); + self.name = "".into(); + self.bin_name = None; + return self._do_parse(&mut raw_args, cursor); + } + } + }; + + // Get the name of the program (argument 1 of env::args()) and determine the + // actual file + // that was used to execute the program. This is because a program called + // ./target/release/my_prog -a + // will have two arguments, './target/release/my_prog', '-a' but we don't want + // to display + // the full path when displaying help messages and such + if !self.settings.is_set(AppSettings::NoBinaryName) { + if let Some(name) = raw_args.next_os(&mut cursor) { + let p = Path::new(name); + + if let Some(f) = p.file_name() { + if let Some(s) = f.to_str() { + if self.bin_name.is_none() { + self.bin_name = Some(s.to_owned()); + } + } + } + } + } + + self._do_parse(&mut raw_args, cursor) + } + + /// Prints the short help message (`-h`) to [`io::stdout()`]. + /// + /// See also [`Command::print_long_help`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// let mut cmd = Command::new("myprog"); + /// cmd.print_help(); + /// ``` + /// [`io::stdout()`]: std::io::stdout() + pub fn print_help(&mut self) -> io::Result<()> { + self._build_self(false); + let color = self.color_help(); + + let mut styled = StyledStr::new(); + let usage = Usage::new(self); + write_help(&mut styled, self, &usage, false); + + let c = Colorizer::new(Stream::Stdout, color).with_content(styled); + c.print() + } + + /// Prints the long help message (`--help`) to [`io::stdout()`]. + /// + /// See also [`Command::print_help`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// let mut cmd = Command::new("myprog"); + /// cmd.print_long_help(); + /// ``` + /// [`io::stdout()`]: std::io::stdout() + /// [`BufWriter`]: std::io::BufWriter + /// [`-h` (short)]: Arg::help() + /// [`--help` (long)]: Arg::long_help() + pub fn print_long_help(&mut self) -> io::Result<()> { + self._build_self(false); + let color = self.color_help(); + + let mut styled = StyledStr::new(); + let usage = Usage::new(self); + write_help(&mut styled, self, &usage, true); + + let c = Colorizer::new(Stream::Stdout, color).with_content(styled); + c.print() + } + + /// Render the short help message (`-h`) to a [`StyledStr`] + /// + /// See also [`Command::render_long_help`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// use std::io; + /// let mut cmd = Command::new("myprog"); + /// let mut out = io::stdout(); + /// let help = cmd.render_help(); + /// println!("{}", help); + /// ``` + /// [`io::Write`]: std::io::Write + /// [`-h` (short)]: Arg::help() + /// [`--help` (long)]: Arg::long_help() + pub fn render_help(&mut self) -> StyledStr { + self._build_self(false); + + let mut styled = StyledStr::new(); + let usage = Usage::new(self); + write_help(&mut styled, self, &usage, false); + styled + } + + /// Render the long help message (`--help`) to a [`StyledStr`]. + /// + /// See also [`Command::render_help`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// use std::io; + /// let mut cmd = Command::new("myprog"); + /// let mut out = io::stdout(); + /// let help = cmd.render_long_help(); + /// println!("{}", help); + /// ``` + /// [`io::Write`]: std::io::Write + /// [`-h` (short)]: Arg::help() + /// [`--help` (long)]: Arg::long_help() + pub fn render_long_help(&mut self) -> StyledStr { + self._build_self(false); + + let mut styled = StyledStr::new(); + let usage = Usage::new(self); + write_help(&mut styled, self, &usage, true); + styled + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Command::render_help`") + )] + pub fn write_help<W: io::Write>(&mut self, w: &mut W) -> io::Result<()> { + self._build_self(false); + + let mut styled = StyledStr::new(); + let usage = Usage::new(self); + write_help(&mut styled, self, &usage, false); + ok!(write!(w, "{}", styled)); + w.flush() + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Command::render_long_help`") + )] + pub fn write_long_help<W: io::Write>(&mut self, w: &mut W) -> io::Result<()> { + self._build_self(false); + + let mut styled = StyledStr::new(); + let usage = Usage::new(self); + write_help(&mut styled, self, &usage, true); + ok!(write!(w, "{}", styled)); + w.flush() + } + + /// Version message rendered as if the user ran `-V`. + /// + /// See also [`Command::render_long_version`]. + /// + /// ### Coloring + /// + /// This function does not try to color the message nor it inserts any [ANSI escape codes]. + /// + /// ### Examples + /// + /// ```rust + /// # use clap::Command; + /// use std::io; + /// let cmd = Command::new("myprog"); + /// println!("{}", cmd.render_version()); + /// ``` + /// [`io::Write`]: std::io::Write + /// [`-V` (short)]: Command::version() + /// [`--version` (long)]: Command::long_version() + /// [ANSI escape codes]: https://en.wikipedia.org/wiki/ANSI_escape_code + pub fn render_version(&self) -> String { + self._render_version(false) + } + + /// Version message rendered as if the user ran `--version`. + /// + /// See also [`Command::render_version`]. + /// + /// ### Coloring + /// + /// This function does not try to color the message nor it inserts any [ANSI escape codes]. + /// + /// ### Examples + /// + /// ```rust + /// # use clap::Command; + /// use std::io; + /// let cmd = Command::new("myprog"); + /// println!("{}", cmd.render_long_version()); + /// ``` + /// [`io::Write`]: std::io::Write + /// [`-V` (short)]: Command::version() + /// [`--version` (long)]: Command::long_version() + /// [ANSI escape codes]: https://en.wikipedia.org/wiki/ANSI_escape_code + pub fn render_long_version(&self) -> String { + self._render_version(true) + } + + /// Usage statement + /// + /// ### Examples + /// + /// ```rust + /// # use clap::Command; + /// use std::io; + /// let mut cmd = Command::new("myprog"); + /// println!("{}", cmd.render_usage()); + /// ``` + pub fn render_usage(&mut self) -> StyledStr { + self.render_usage_().unwrap_or_default() + } + + pub(crate) fn render_usage_(&mut self) -> Option<StyledStr> { + // If there are global arguments, or settings we need to propagate them down to subcommands + // before parsing incase we run into a subcommand + self._build_self(false); + + Usage::new(self).create_usage_with_title(&[]) + } +} + +/// # Application-wide Settings +/// +/// These settings will apply to the top-level command and all subcommands, by default. Some +/// settings can be overridden in subcommands. +impl Command { + /// Specifies that the parser should not assume the first argument passed is the binary name. + /// + /// This is normally the case when using a "daemon" style mode. For shells / REPLs, see + /// [`Command::multicall`][Command::multicall]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, arg}; + /// let m = Command::new("myprog") + /// .no_binary_name(true) + /// .arg(arg!(<cmd> ... "commands to run")) + /// .get_matches_from(vec!["command", "set"]); + /// + /// let cmds: Vec<_> = m.get_many::<String>("cmd").unwrap().collect(); + /// assert_eq!(cmds, ["command", "set"]); + /// ``` + /// [`try_get_matches_from_mut`]: crate::Command::try_get_matches_from_mut() + #[inline] + pub fn no_binary_name(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::NoBinaryName) + } else { + self.unset_global_setting(AppSettings::NoBinaryName) + } + } + + /// Try not to fail on parse errors, like missing option values. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, arg}; + /// let cmd = Command::new("cmd") + /// .ignore_errors(true) + /// .arg(arg!(-c --config <FILE> "Sets a custom config file")) + /// .arg(arg!(-x --stuff <FILE> "Sets a custom stuff file")) + /// .arg(arg!(f: -f "Flag")); + /// + /// let r = cmd.try_get_matches_from(vec!["cmd", "-c", "file", "-f", "-x"]); + /// + /// assert!(r.is_ok(), "unexpected error: {:?}", r); + /// let m = r.unwrap(); + /// assert_eq!(m.get_one::<String>("config").unwrap(), "file"); + /// assert!(m.get_flag("f")); + /// assert_eq!(m.get_one::<String>("stuff"), None); + /// ``` + #[inline] + pub fn ignore_errors(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::IgnoreErrors) + } else { + self.unset_global_setting(AppSettings::IgnoreErrors) + } + } + + /// Replace prior occurrences of arguments rather than error + /// + /// For any argument that would conflict with itself by default (e.g. + /// [`ArgAction::Set`][ArgAction::Set], it will now override itself. + /// + /// This is the equivalent to saying the `foo` arg using [`Arg::overrides_with("foo")`] for all + /// defined arguments. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// [`Arg::overrides_with("foo")`]: crate::Arg::overrides_with() + #[inline] + pub fn args_override_self(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::AllArgsOverrideSelf) + } else { + self.unset_global_setting(AppSettings::AllArgsOverrideSelf) + } + } + + /// Disables the automatic delimiting of values after `--` or when [`Command::trailing_var_arg`] + /// was used. + /// + /// **NOTE:** The same thing can be done manually by setting the final positional argument to + /// [`Arg::value_delimiter(None)`]. Using this setting is safer, because it's easier to locate + /// when making changes. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .dont_delimit_trailing_values(true) + /// .get_matches(); + /// ``` + /// + /// [`Arg::value_delimiter(None)`]: crate::Arg::value_delimiter() + #[inline] + pub fn dont_delimit_trailing_values(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::DontDelimitTrailingValues) + } else { + self.unset_global_setting(AppSettings::DontDelimitTrailingValues) + } + } + + /// Sets when to color output. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// **NOTE:** Default behaviour is [`ColorChoice::Auto`]. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, ColorChoice}; + /// Command::new("myprog") + /// .color(ColorChoice::Never) + /// .get_matches(); + /// ``` + /// [`ColorChoice::Auto`]: crate::ColorChoice::Auto + #[cfg(feature = "color")] + #[inline] + #[must_use] + pub fn color(self, color: ColorChoice) -> Self { + let cmd = self + .unset_global_setting(AppSettings::ColorAuto) + .unset_global_setting(AppSettings::ColorAlways) + .unset_global_setting(AppSettings::ColorNever); + match color { + ColorChoice::Auto => cmd.global_setting(AppSettings::ColorAuto), + ColorChoice::Always => cmd.global_setting(AppSettings::ColorAlways), + ColorChoice::Never => cmd.global_setting(AppSettings::ColorNever), + } + } + + /// Sets the terminal width at which to wrap help messages. + /// + /// Using `0` will ignore terminal widths and use source formatting. + /// + /// Defaults to current terminal width when `wrap_help` feature flag is enabled. If the flag + /// is disabled or it cannot be determined, the default is 100. + /// + /// **NOTE:** This setting applies globally and *not* on a per-command basis. + /// + /// **NOTE:** This requires the [`wrap_help` feature][crate::_features] + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .term_width(80) + /// # ; + /// ``` + #[inline] + #[must_use] + #[cfg(any(not(feature = "unstable-v5"), feature = "wrap_help"))] + pub fn term_width(mut self, width: usize) -> Self { + self.term_w = Some(width); + self + } + + /// Limit the line length for wrapping help when using the current terminal's width. + /// + /// This only applies when [`term_width`][Command::term_width] is unset so that the current + /// terminal's width will be used. See [`Command::term_width`] for more details. + /// + /// Using `0` will ignore terminal widths and use source formatting (default). + /// + /// **NOTE:** This setting applies globally and *not* on a per-command basis. + /// + /// **NOTE:** This requires the [`wrap_help` feature][crate::_features] + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .max_term_width(100) + /// # ; + /// ``` + #[inline] + #[must_use] + #[cfg(any(not(feature = "unstable-v5"), feature = "wrap_help"))] + pub fn max_term_width(mut self, w: usize) -> Self { + self.max_w = Some(w); + self + } + + /// Disables `-V` and `--version` flag. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, error::ErrorKind}; + /// let res = Command::new("myprog") + /// .disable_version_flag(true) + /// .try_get_matches_from(vec![ + /// "myprog", "-V" + /// ]); + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); + /// ``` + #[inline] + pub fn disable_version_flag(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::DisableVersionFlag) + } else { + self.unset_global_setting(AppSettings::DisableVersionFlag) + } + } + + /// Specifies to use the version of the current command for all [`subcommands`]. + /// + /// Defaults to `false`; subcommands have independent version strings from their parents. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .version("v1.1") + /// .propagate_version(true) + /// .subcommand(Command::new("test")) + /// .get_matches(); + /// // running `$ myprog test --version` will display + /// // "myprog-test v1.1" + /// ``` + /// + /// [`subcommands`]: crate::Command::subcommand() + #[inline] + pub fn propagate_version(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::PropagateVersion) + } else { + self.unset_global_setting(AppSettings::PropagateVersion) + } + } + + /// Places the help string for all arguments and subcommands on the line after them. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .next_line_help(true) + /// .get_matches(); + /// ``` + #[inline] + pub fn next_line_help(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::NextLineHelp) + } else { + self.unset_global_setting(AppSettings::NextLineHelp) + } + } + + /// Disables `-h` and `--help` flag. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, error::ErrorKind}; + /// let res = Command::new("myprog") + /// .disable_help_flag(true) + /// .try_get_matches_from(vec![ + /// "myprog", "-h" + /// ]); + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); + /// ``` + #[inline] + pub fn disable_help_flag(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::DisableHelpFlag) + } else { + self.unset_global_setting(AppSettings::DisableHelpFlag) + } + } + + /// Disables the `help` [`subcommand`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, error::ErrorKind}; + /// let res = Command::new("myprog") + /// .disable_help_subcommand(true) + /// // Normally, creating a subcommand causes a `help` subcommand to automatically + /// // be generated as well + /// .subcommand(Command::new("test")) + /// .try_get_matches_from(vec![ + /// "myprog", "help" + /// ]); + /// assert!(res.is_err()); + /// assert_eq!(res.unwrap_err().kind(), ErrorKind::InvalidSubcommand); + /// ``` + /// + /// [`subcommand`]: crate::Command::subcommand() + #[inline] + pub fn disable_help_subcommand(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::DisableHelpSubcommand) + } else { + self.unset_global_setting(AppSettings::DisableHelpSubcommand) + } + } + + /// Disables colorized help messages. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .disable_colored_help(true) + /// .get_matches(); + /// ``` + #[inline] + pub fn disable_colored_help(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::DisableColoredHelp) + } else { + self.unset_global_setting(AppSettings::DisableColoredHelp) + } + } + + /// Panic if help descriptions are omitted. + /// + /// **NOTE:** When deriving [`Parser`][crate::Parser], you could instead check this at + /// compile-time with `#![deny(missing_docs)]` + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .help_expected(true) + /// .arg( + /// Arg::new("foo").help("It does foo stuff") + /// // As required via `help_expected`, a help message was supplied + /// ) + /// # .get_matches(); + /// ``` + /// + /// # Panics + /// + /// ```rust,no_run + /// # use clap::{Command, Arg}; + /// Command::new("myapp") + /// .help_expected(true) + /// .arg( + /// Arg::new("foo") + /// // Someone forgot to put .about("...") here + /// // Since the setting `help_expected` is activated, this will lead to + /// // a panic (if you are in debug mode) + /// ) + /// # .get_matches(); + ///``` + #[inline] + pub fn help_expected(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::HelpExpected) + } else { + self.unset_global_setting(AppSettings::HelpExpected) + } + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "This is now the default") + )] + pub fn dont_collapse_args_in_usage(self, _yes: bool) -> Self { + self + } + + /// Tells `clap` *not* to print possible values when displaying help information. + /// + /// This can be useful if there are many values, or they are explained elsewhere. + /// + /// To set this per argument, see + /// [`Arg::hide_possible_values`][crate::Arg::hide_possible_values]. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + #[inline] + pub fn hide_possible_values(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::HidePossibleValues) + } else { + self.unset_global_setting(AppSettings::HidePossibleValues) + } + } + + /// Allow partial matches of long arguments or their [aliases]. + /// + /// For example, to match an argument named `--test`, one could use `--t`, `--te`, `--tes`, and + /// `--test`. + /// + /// **NOTE:** The match *must not* be ambiguous at all in order to succeed. i.e. to match + /// `--te` to `--test` there could not also be another argument or alias `--temp` because both + /// start with `--te` + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// [aliases]: crate::Command::aliases() + #[inline] + pub fn infer_long_args(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::InferLongArgs) + } else { + self.unset_global_setting(AppSettings::InferLongArgs) + } + } + + /// Allow partial matches of [subcommand] names and their [aliases]. + /// + /// For example, to match a subcommand named `test`, one could use `t`, `te`, `tes`, and + /// `test`. + /// + /// **NOTE:** The match *must not* be ambiguous at all in order to succeed. i.e. to match `te` + /// to `test` there could not also be a subcommand or alias `temp` because both start with `te` + /// + /// **CAUTION:** This setting can interfere with [positional/free arguments], take care when + /// designing CLIs which allow inferred subcommands and have potential positional/free + /// arguments whose values could start with the same characters as subcommands. If this is the + /// case, it's recommended to use settings such as [`Command::args_conflicts_with_subcommands`] in + /// conjunction with this setting. + /// + /// **NOTE:** This choice is propagated to all child subcommands. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// let m = Command::new("prog") + /// .infer_subcommands(true) + /// .subcommand(Command::new("test")) + /// .get_matches_from(vec![ + /// "prog", "te" + /// ]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + /// + /// [subcommand]: crate::Command::subcommand() + /// [positional/free arguments]: crate::Arg::index() + /// [aliases]: crate::Command::aliases() + #[inline] + pub fn infer_subcommands(self, yes: bool) -> Self { + if yes { + self.global_setting(AppSettings::InferSubcommands) + } else { + self.unset_global_setting(AppSettings::InferSubcommands) + } + } +} + +/// # Command-specific Settings +/// +/// These apply only to the current command and are not inherited by subcommands. +impl Command { + /// (Re)Sets the program's name. + /// + /// See [`Command::new`] for more details. + /// + /// # Examples + /// + /// ```ignore + /// let cmd = clap::command!() + /// .name("foo"); + /// + /// // continued logic goes here, such as `cmd.get_matches()` etc. + /// ``` + #[must_use] + pub fn name(mut self, name: impl Into<Str>) -> Self { + self.name = name.into(); + self + } + + /// Overrides the runtime-determined name of the binary for help and error messages. + /// + /// This should only be used when absolutely necessary, such as when the binary name for your + /// application is misleading, or perhaps *not* how the user should invoke your program. + /// + /// **Pro-tip:** When building things such as third party `cargo` + /// subcommands, this setting **should** be used! + /// + /// **NOTE:** This *does not* change or set the name of the binary file on + /// disk. It only changes what clap thinks the name is for the purposes of + /// error or help messages. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("My Program") + /// .bin_name("my_binary") + /// # ; + /// ``` + #[must_use] + pub fn bin_name(mut self, name: impl IntoResettable<String>) -> Self { + self.bin_name = name.into_resettable().into_option(); + self + } + + /// Overrides the runtime-determined display name of the program for help and error messages. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("My Program") + /// .display_name("my_program") + /// # ; + /// ``` + #[must_use] + pub fn display_name(mut self, name: impl IntoResettable<String>) -> Self { + self.display_name = name.into_resettable().into_option(); + self + } + + /// Sets the author(s) for the help message. + /// + /// **Pro-tip:** Use `clap`s convenience macro [`crate_authors!`] to + /// automatically set your application's author(s) to the same thing as your + /// crate at compile time. + /// + /// **NOTE:** A custom [`help_template`][Command::help_template] is needed for author to show + /// up. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .author("Me, me@mymain.com") + /// # ; + /// ``` + #[must_use] + pub fn author(mut self, author: impl IntoResettable<Str>) -> Self { + self.author = author.into_resettable().into_option(); + self + } + + /// Sets the program's description for the short help (`-h`). + /// + /// If [`Command::long_about`] is not specified, this message will be displayed for `--help`. + /// + /// **NOTE:** Only `Command::about` (short format) is used in completion + /// script generation in order to be concise. + /// + /// See also [`crate_description!`](crate::crate_description!). + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .about("Does really amazing things for great people") + /// # ; + /// ``` + #[must_use] + pub fn about(mut self, about: impl IntoResettable<StyledStr>) -> Self { + self.about = about.into_resettable().into_option(); + self + } + + /// Sets the program's description for the long help (`--help`). + /// + /// If [`Command::about`] is not specified, this message will be displayed for `-h`. + /// + /// **NOTE:** Only [`Command::about`] (short format) is used in completion + /// script generation in order to be concise. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .long_about( + /// "Does really amazing things to great people. Now let's talk a little + /// more in depth about how this subcommand really works. It may take about + /// a few lines of text, but that's ok!") + /// # ; + /// ``` + /// [`Command::about`]: Command::about() + #[must_use] + pub fn long_about(mut self, long_about: impl IntoResettable<StyledStr>) -> Self { + self.long_about = long_about.into_resettable().into_option(); + self + } + + /// Free-form help text for after auto-generated short help (`-h`). + /// + /// This is often used to describe how to use the arguments, caveats to be noted, or license + /// and contact information. + /// + /// If [`Command::after_long_help`] is not specified, this message will be displayed for `--help`. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .after_help("Does really amazing things for great people... but be careful with -R!") + /// # ; + /// ``` + /// + #[must_use] + pub fn after_help(mut self, help: impl IntoResettable<StyledStr>) -> Self { + self.after_help = help.into_resettable().into_option(); + self + } + + /// Free-form help text for after auto-generated long help (`--help`). + /// + /// This is often used to describe how to use the arguments, caveats to be noted, or license + /// and contact information. + /// + /// If [`Command::after_help`] is not specified, this message will be displayed for `-h`. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .after_long_help("Does really amazing things to great people... but be careful with -R, \ + /// like, for real, be careful with this!") + /// # ; + /// ``` + #[must_use] + pub fn after_long_help(mut self, help: impl IntoResettable<StyledStr>) -> Self { + self.after_long_help = help.into_resettable().into_option(); + self + } + + /// Free-form help text for before auto-generated short help (`-h`). + /// + /// This is often used for header, copyright, or license information. + /// + /// If [`Command::before_long_help`] is not specified, this message will be displayed for `--help`. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .before_help("Some info I'd like to appear before the help info") + /// # ; + /// ``` + #[must_use] + pub fn before_help(mut self, help: impl IntoResettable<StyledStr>) -> Self { + self.before_help = help.into_resettable().into_option(); + self + } + + /// Free-form help text for before auto-generated long help (`--help`). + /// + /// This is often used for header, copyright, or license information. + /// + /// If [`Command::before_help`] is not specified, this message will be displayed for `-h`. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .before_long_help("Some verbose and long info I'd like to appear before the help info") + /// # ; + /// ``` + #[must_use] + pub fn before_long_help(mut self, help: impl IntoResettable<StyledStr>) -> Self { + self.before_long_help = help.into_resettable().into_option(); + self + } + + /// Sets the version for the short version (`-V`) and help messages. + /// + /// If [`Command::long_version`] is not specified, this message will be displayed for `--version`. + /// + /// **Pro-tip:** Use `clap`s convenience macro [`crate_version!`] to + /// automatically set your application's version to the same thing as your + /// crate at compile time. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .version("v0.1.24") + /// # ; + /// ``` + #[must_use] + pub fn version(mut self, ver: impl IntoResettable<Str>) -> Self { + self.version = ver.into_resettable().into_option(); + self + } + + /// Sets the version for the long version (`--version`) and help messages. + /// + /// If [`Command::version`] is not specified, this message will be displayed for `-V`. + /// + /// **Pro-tip:** Use `clap`s convenience macro [`crate_version!`] to + /// automatically set your application's version to the same thing as your + /// crate at compile time. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .long_version( + /// "v0.1.24 + /// commit: abcdef89726d + /// revision: 123 + /// release: 2 + /// binary: myprog") + /// # ; + /// ``` + #[must_use] + pub fn long_version(mut self, ver: impl IntoResettable<Str>) -> Self { + self.long_version = ver.into_resettable().into_option(); + self + } + + /// Overrides the `clap` generated usage string for help and error messages. + /// + /// **NOTE:** Using this setting disables `clap`s "context-aware" usage + /// strings. After this setting is set, this will be *the only* usage string + /// displayed to the user! + /// + /// **NOTE:** Multiple usage lines may be present in the usage argument, but + /// some rules need to be followed to ensure the usage lines are formatted + /// correctly by the default help formatter: + /// + /// - Do not indent the first usage line. + /// - Indent all subsequent usage lines with seven spaces. + /// - The last line must not end with a newline. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .override_usage("myapp [-clDas] <some_file>") + /// # ; + /// ``` + /// + /// Or for multiple usage lines: + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .override_usage( + /// "myapp -X [-a] [-b] <file>\n \ + /// myapp -Y [-c] <file1> <file2>\n \ + /// myapp -Z [-d|-e]" + /// ) + /// # ; + /// ``` + /// + /// [`ArgMatches::usage`]: ArgMatches::usage() + #[must_use] + pub fn override_usage(mut self, usage: impl IntoResettable<StyledStr>) -> Self { + self.usage_str = usage.into_resettable().into_option(); + self + } + + /// Overrides the `clap` generated help message (both `-h` and `--help`). + /// + /// This should only be used when the auto-generated message does not suffice. + /// + /// **NOTE:** This **only** replaces the help message for the current + /// command, meaning if you are using subcommands, those help messages will + /// still be auto-generated unless you specify a [`Command::override_help`] for + /// them as well. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myapp") + /// .override_help("myapp v1.0\n\ + /// Does awesome things\n\ + /// (C) me@mail.com\n\n\ + /// + /// Usage: myapp <opts> <command>\n\n\ + /// + /// Options:\n\ + /// -h, --help Display this message\n\ + /// -V, --version Display version info\n\ + /// -s <stuff> Do something with stuff\n\ + /// -v Be verbose\n\n\ + /// + /// Commands:\n\ + /// help Print this message\n\ + /// work Do some work") + /// # ; + /// ``` + #[must_use] + pub fn override_help(mut self, help: impl IntoResettable<StyledStr>) -> Self { + self.help_str = help.into_resettable().into_option(); + self + } + + /// Sets the help template to be used, overriding the default format. + /// + /// **NOTE:** The template system is by design very simple. Therefore, the + /// tags have to be written in the lowercase and without spacing. + /// + /// Tags are given inside curly brackets. + /// + /// Valid tags are: + /// + /// * `{name}` - Display name for the (sub-)command. + /// * `{bin}` - Binary name.(deprecated) + /// * `{version}` - Version number. + /// * `{author}` - Author information. + /// * `{author-with-newline}` - Author followed by `\n`. + /// * `{author-section}` - Author preceded and followed by `\n`. + /// * `{about}` - General description (from [`Command::about`] or + /// [`Command::long_about`]). + /// * `{about-with-newline}` - About followed by `\n`. + /// * `{about-section}` - About preceded and followed by '\n'. + /// * `{usage-heading}` - Automatically generated usage heading. + /// * `{usage}` - Automatically generated or given usage string. + /// * `{all-args}` - Help for all arguments (options, flags, positional + /// arguments, and subcommands) including titles. + /// * `{options}` - Help for options. + /// * `{positionals}` - Help for positional arguments. + /// * `{subcommands}` - Help for subcommands. + /// * `{tab}` - Standard tab sized used within clap + /// * `{after-help}` - Help from [`Command::after_help`] or [`Command::after_long_help`]. + /// * `{before-help}` - Help from [`Command::before_help`] or [`Command::before_long_help`]. + /// + /// # Examples + /// + /// For a very brief help: + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .version("1.0") + /// .help_template("{name} ({version}) - {usage}") + /// # ; + /// ``` + /// + /// For showing more application context: + /// + /// ```no_run + /// # use clap::Command; + /// Command::new("myprog") + /// .version("1.0") + /// .help_template("\ + /// {before-help}{name} {version} + /// {author-with-newline}{about-with-newline} + /// {usage-heading} {usage} + /// + /// {all-args}{after-help} + /// ") + /// # ; + /// ``` + /// [`Command::about`]: Command::about() + /// [`Command::long_about`]: Command::long_about() + /// [`Command::after_help`]: Command::after_help() + /// [`Command::after_long_help`]: Command::after_long_help() + /// [`Command::before_help`]: Command::before_help() + /// [`Command::before_long_help`]: Command::before_long_help() + #[must_use] + #[cfg(feature = "help")] + pub fn help_template(mut self, s: impl IntoResettable<StyledStr>) -> Self { + self.template = s.into_resettable().into_option(); + self + } + + #[inline] + #[must_use] + pub(crate) fn setting<F>(mut self, setting: F) -> Self + where + F: Into<AppFlags>, + { + self.settings.insert(setting.into()); + self + } + + #[inline] + #[must_use] + pub(crate) fn unset_setting<F>(mut self, setting: F) -> Self + where + F: Into<AppFlags>, + { + self.settings.remove(setting.into()); + self + } + + #[inline] + #[must_use] + pub(crate) fn global_setting(mut self, setting: AppSettings) -> Self { + self.settings.set(setting); + self.g_settings.set(setting); + self + } + + #[inline] + #[must_use] + pub(crate) fn unset_global_setting(mut self, setting: AppSettings) -> Self { + self.settings.unset(setting); + self.g_settings.unset(setting); + self + } + + /// Set the default section heading for future args. + /// + /// This will be used for any arg that hasn't had [`Arg::help_heading`] called. + /// + /// This is useful if the default `Options` or `Arguments` headings are + /// not specific enough for one's use case. + /// + /// For subcommands, see [`Command::subcommand_help_heading`] + /// + /// [`Command::arg`]: Command::arg() + /// [`Arg::help_heading`]: crate::Arg::help_heading() + #[inline] + #[must_use] + pub fn next_help_heading(mut self, heading: impl IntoResettable<Str>) -> Self { + self.current_help_heading = heading.into_resettable().into_option(); + self + } + + /// Change the starting value for assigning future display orders for ags. + /// + /// This will be used for any arg that hasn't had [`Arg::display_order`] called. + #[inline] + #[must_use] + pub fn next_display_order(mut self, disp_ord: impl IntoResettable<usize>) -> Self { + self.current_disp_ord = disp_ord.into_resettable().into_option(); + self + } + + /// Replaces an argument or subcommand used on the CLI at runtime with other arguments or subcommands. + /// + /// **Note:** This is gated behind [`unstable-replace`](https://github.com/clap-rs/clap/issues/2836) + /// + /// When this method is used, `name` is removed from the CLI, and `target` + /// is inserted in its place. Parsing continues as if the user typed + /// `target` instead of `name`. + /// + /// This can be used to create "shortcuts" for subcommands, or if a + /// particular argument has the semantic meaning of several other specific + /// arguments and values. + /// + /// # Examples + /// + /// We'll start with the "subcommand short" example. In this example, let's + /// assume we have a program with a subcommand `module` which can be invoked + /// via `cmd module`. Now let's also assume `module` also has a subcommand + /// called `install` which can be invoked `cmd module install`. If for some + /// reason users needed to be able to reach `cmd module install` via the + /// short-hand `cmd install`, we'd have several options. + /// + /// We *could* create another sibling subcommand to `module` called + /// `install`, but then we would need to manage another subcommand and manually + /// dispatch to `cmd module install` handling code. This is error prone and + /// tedious. + /// + /// We could instead use [`Command::replace`] so that, when the user types `cmd + /// install`, `clap` will replace `install` with `module install` which will + /// end up getting parsed as if the user typed the entire incantation. + /// + /// ```rust + /// # use clap::Command; + /// let m = Command::new("cmd") + /// .subcommand(Command::new("module") + /// .subcommand(Command::new("install"))) + /// .replace("install", &["module", "install"]) + /// .get_matches_from(vec!["cmd", "install"]); + /// + /// assert!(m.subcommand_matches("module").is_some()); + /// assert!(m.subcommand_matches("module").unwrap().subcommand_matches("install").is_some()); + /// ``` + /// + /// Now let's show an argument example! + /// + /// Let's assume we have an application with two flags `--save-context` and + /// `--save-runtime`. But often users end up needing to do *both* at the + /// same time. We can add a third flag `--save-all` which semantically means + /// the same thing as `cmd --save-context --save-runtime`. To implement that, + /// we have several options. + /// + /// We could create this third argument and manually check if that argument + /// and in our own consumer code handle the fact that both `--save-context` + /// and `--save-runtime` *should* have been used. But again this is error + /// prone and tedious. If we had code relying on checking `--save-context` + /// and we forgot to update that code to *also* check `--save-all` it'd mean + /// an error! + /// + /// Luckily we can use [`Command::replace`] so that when the user types + /// `--save-all`, `clap` will replace that argument with `--save-context + /// --save-runtime`, and parsing will continue like normal. Now all our code + /// that was originally checking for things like `--save-context` doesn't + /// need to change! + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("cmd") + /// .arg(Arg::new("save-context") + /// .long("save-context") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("save-runtime") + /// .long("save-runtime") + /// .action(ArgAction::SetTrue)) + /// .replace("--save-all", &["--save-context", "--save-runtime"]) + /// .get_matches_from(vec!["cmd", "--save-all"]); + /// + /// assert!(m.get_flag("save-context")); + /// assert!(m.get_flag("save-runtime")); + /// ``` + /// + /// This can also be used with options, for example if our application with + /// `--save-*` above also had a `--format=TYPE` option. Let's say it + /// accepted `txt` or `json` values. However, when `--save-all` is used, + /// only `--format=json` is allowed, or valid. We could change the example + /// above to enforce this: + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let m = Command::new("cmd") + /// .arg(Arg::new("save-context") + /// .long("save-context") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("save-runtime") + /// .long("save-runtime") + /// .action(ArgAction::SetTrue)) + /// .arg(Arg::new("format") + /// .long("format") + /// .action(ArgAction::Set) + /// .value_parser(["txt", "json"])) + /// .replace("--save-all", &["--save-context", "--save-runtime", "--format=json"]) + /// .get_matches_from(vec!["cmd", "--save-all"]); + /// + /// assert!(m.get_flag("save-context")); + /// assert!(m.get_flag("save-runtime")); + /// assert_eq!(m.get_one::<String>("format").unwrap(), "json"); + /// ``` + /// + /// [`Command::replace`]: Command::replace() + #[inline] + #[cfg(feature = "unstable-replace")] + #[must_use] + pub fn replace( + mut self, + name: impl Into<Str>, + target: impl IntoIterator<Item = impl Into<Str>>, + ) -> Self { + self.replacers + .insert(name.into(), target.into_iter().map(Into::into).collect()); + self + } + + /// Exit gracefully if no arguments are present (e.g. `$ myprog`). + /// + /// **NOTE:** [`subcommands`] count as arguments + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command}; + /// Command::new("myprog") + /// .arg_required_else_help(true); + /// ``` + /// + /// [`subcommands`]: crate::Command::subcommand() + /// [`Arg::default_value`]: crate::Arg::default_value() + #[inline] + pub fn arg_required_else_help(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::ArgRequiredElseHelp) + } else { + self.unset_setting(AppSettings::ArgRequiredElseHelp) + } + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::allow_hyphen_values`") + )] + pub fn allow_hyphen_values(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::AllowHyphenValues) + } else { + self.unset_setting(AppSettings::AllowHyphenValues) + } + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::allow_negative_numbers`") + )] + pub fn allow_negative_numbers(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::AllowNegativeNumbers) + } else { + self.unset_setting(AppSettings::AllowNegativeNumbers) + } + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::trailing_var_arg`") + )] + pub fn trailing_var_arg(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::TrailingVarArg) + } else { + self.unset_setting(AppSettings::TrailingVarArg) + } + } + + /// Allows one to implement two styles of CLIs where positionals can be used out of order. + /// + /// The first example is a CLI where the second to last positional argument is optional, but + /// the final positional argument is required. Such as `$ prog [optional] <required>` where one + /// of the two following usages is allowed: + /// + /// * `$ prog [optional] <required>` + /// * `$ prog <required>` + /// + /// This would otherwise not be allowed. This is useful when `[optional]` has a default value. + /// + /// **Note:** when using this style of "missing positionals" the final positional *must* be + /// [required] if `--` will not be used to skip to the final positional argument. + /// + /// **Note:** This style also only allows a single positional argument to be "skipped" without + /// the use of `--`. To skip more than one, see the second example. + /// + /// The second example is when one wants to skip multiple optional positional arguments, and use + /// of the `--` operator is OK (but not required if all arguments will be specified anyways). + /// + /// For example, imagine a CLI which has three positional arguments `[foo] [bar] [baz]...` where + /// `baz` accepts multiple values (similar to man `ARGS...` style training arguments). + /// + /// With this setting the following invocations are posisble: + /// + /// * `$ prog foo bar baz1 baz2 baz3` + /// * `$ prog foo -- baz1 baz2 baz3` + /// * `$ prog -- baz1 baz2 baz3` + /// + /// # Examples + /// + /// Style number one from above: + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// // Assume there is an external subcommand named "subcmd" + /// let m = Command::new("myprog") + /// .allow_missing_positional(true) + /// .arg(Arg::new("arg1")) + /// .arg(Arg::new("arg2") + /// .required(true)) + /// .get_matches_from(vec![ + /// "prog", "other" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("arg1"), None); + /// assert_eq!(m.get_one::<String>("arg2").unwrap(), "other"); + /// ``` + /// + /// Now the same example, but using a default value for the first optional positional argument + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// // Assume there is an external subcommand named "subcmd" + /// let m = Command::new("myprog") + /// .allow_missing_positional(true) + /// .arg(Arg::new("arg1") + /// .default_value("something")) + /// .arg(Arg::new("arg2") + /// .required(true)) + /// .get_matches_from(vec![ + /// "prog", "other" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("arg1").unwrap(), "something"); + /// assert_eq!(m.get_one::<String>("arg2").unwrap(), "other"); + /// ``` + /// + /// Style number two from above: + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// // Assume there is an external subcommand named "subcmd" + /// let m = Command::new("myprog") + /// .allow_missing_positional(true) + /// .arg(Arg::new("foo")) + /// .arg(Arg::new("bar")) + /// .arg(Arg::new("baz").action(ArgAction::Set).num_args(1..)) + /// .get_matches_from(vec![ + /// "prog", "foo", "bar", "baz1", "baz2", "baz3" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("foo").unwrap(), "foo"); + /// assert_eq!(m.get_one::<String>("bar").unwrap(), "bar"); + /// assert_eq!(m.get_many::<String>("baz").unwrap().collect::<Vec<_>>(), &["baz1", "baz2", "baz3"]); + /// ``` + /// + /// Now nofice if we don't specify `foo` or `baz` but use the `--` operator. + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// // Assume there is an external subcommand named "subcmd" + /// let m = Command::new("myprog") + /// .allow_missing_positional(true) + /// .arg(Arg::new("foo")) + /// .arg(Arg::new("bar")) + /// .arg(Arg::new("baz").action(ArgAction::Set).num_args(1..)) + /// .get_matches_from(vec![ + /// "prog", "--", "baz1", "baz2", "baz3" + /// ]); + /// + /// assert_eq!(m.get_one::<String>("foo"), None); + /// assert_eq!(m.get_one::<String>("bar"), None); + /// assert_eq!(m.get_many::<String>("baz").unwrap().collect::<Vec<_>>(), &["baz1", "baz2", "baz3"]); + /// ``` + /// + /// [required]: crate::Arg::required() + #[inline] + pub fn allow_missing_positional(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::AllowMissingPositional) + } else { + self.unset_setting(AppSettings::AllowMissingPositional) + } + } +} + +/// # Subcommand-specific Settings +impl Command { + /// Sets the short version of the subcommand flag without the preceding `-`. + /// + /// Allows the subcommand to be used as if it were an [`Arg::short`]. + /// + /// # Examples + /// + /// ``` + /// # use clap::{Command, Arg, ArgAction}; + /// let matches = Command::new("pacman") + /// .subcommand( + /// Command::new("sync").short_flag('S').arg( + /// Arg::new("search") + /// .short('s') + /// .long("search") + /// .action(ArgAction::SetTrue) + /// .help("search remote repositories for matching strings"), + /// ), + /// ) + /// .get_matches_from(vec!["pacman", "-Ss"]); + /// + /// assert_eq!(matches.subcommand_name().unwrap(), "sync"); + /// let sync_matches = matches.subcommand_matches("sync").unwrap(); + /// assert!(sync_matches.get_flag("search")); + /// ``` + /// [`Arg::short`]: Arg::short() + #[must_use] + pub fn short_flag(mut self, short: impl IntoResettable<char>) -> Self { + self.short_flag = short.into_resettable().into_option(); + self + } + + /// Sets the long version of the subcommand flag without the preceding `--`. + /// + /// Allows the subcommand to be used as if it were an [`Arg::long`]. + /// + /// **NOTE:** Any leading `-` characters will be stripped. + /// + /// # Examples + /// + /// To set `long_flag` use a word containing valid UTF-8 codepoints. If you supply a double leading + /// `--` such as `--sync` they will be stripped. Hyphens in the middle of the word; however, + /// will *not* be stripped (i.e. `sync-file` is allowed). + /// + /// ``` + /// # use clap::{Command, Arg, ArgAction}; + /// let matches = Command::new("pacman") + /// .subcommand( + /// Command::new("sync").long_flag("sync").arg( + /// Arg::new("search") + /// .short('s') + /// .long("search") + /// .action(ArgAction::SetTrue) + /// .help("search remote repositories for matching strings"), + /// ), + /// ) + /// .get_matches_from(vec!["pacman", "--sync", "--search"]); + /// + /// assert_eq!(matches.subcommand_name().unwrap(), "sync"); + /// let sync_matches = matches.subcommand_matches("sync").unwrap(); + /// assert!(sync_matches.get_flag("search")); + /// ``` + /// + /// [`Arg::long`]: Arg::long() + #[must_use] + pub fn long_flag(mut self, long: impl Into<Str>) -> Self { + self.long_flag = Some(long.into()); + self + } + + /// Sets a hidden alias to this subcommand. + /// + /// This allows the subcommand to be accessed via *either* the original name, or this given + /// alias. This is more efficient and easier than creating multiple hidden subcommands as one + /// only needs to check for the existence of this command, and not all aliased variants. + /// + /// **NOTE:** Aliases defined with this method are *hidden* from the help + /// message. If you're looking for aliases that will be displayed in the help + /// message, see [`Command::visible_alias`]. + /// + /// **NOTE:** When using aliases and checking for the existence of a + /// particular subcommand within an [`ArgMatches`] struct, one only needs to + /// search for the original name and not all aliases. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test") + /// .alias("do-stuff")) + /// .get_matches_from(vec!["myprog", "do-stuff"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + /// [`Command::visible_alias`]: Command::visible_alias() + #[must_use] + pub fn alias(mut self, name: impl IntoResettable<Str>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + self.aliases.push((name, false)); + } else { + self.aliases.clear(); + } + self + } + + /// Add an alias, which functions as "hidden" short flag subcommand + /// + /// This will automatically dispatch as if this subcommand was used. This is more efficient, + /// and easier than creating multiple hidden subcommands as one only needs to check for the + /// existence of this command, and not all variants. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test").short_flag('t') + /// .short_flag_alias('d')) + /// .get_matches_from(vec!["myprog", "-d"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + #[must_use] + pub fn short_flag_alias(mut self, name: impl IntoResettable<char>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + debug_assert!(name != '-', "short alias name cannot be `-`"); + self.short_flag_aliases.push((name, false)); + } else { + self.short_flag_aliases.clear(); + } + self + } + + /// Add an alias, which functions as a "hidden" long flag subcommand. + /// + /// This will automatically dispatch as if this subcommand was used. This is more efficient, + /// and easier than creating multiple hidden subcommands as one only needs to check for the + /// existence of this command, and not all variants. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test").long_flag("test") + /// .long_flag_alias("testing")) + /// .get_matches_from(vec!["myprog", "--testing"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + #[must_use] + pub fn long_flag_alias(mut self, name: impl IntoResettable<Str>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + self.long_flag_aliases.push((name, false)); + } else { + self.long_flag_aliases.clear(); + } + self + } + + /// Sets multiple hidden aliases to this subcommand. + /// + /// This allows the subcommand to be accessed via *either* the original name or any of the + /// given aliases. This is more efficient, and easier than creating multiple hidden subcommands + /// as one only needs to check for the existence of this command and not all aliased variants. + /// + /// **NOTE:** Aliases defined with this method are *hidden* from the help + /// message. If looking for aliases that will be displayed in the help + /// message, see [`Command::visible_aliases`]. + /// + /// **NOTE:** When using aliases and checking for the existence of a + /// particular subcommand within an [`ArgMatches`] struct, one only needs to + /// search for the original name and not all aliases. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test") + /// .aliases(["do-stuff", "do-tests", "tests"])) + /// .arg(Arg::new("input") + /// .help("the file to add") + /// .required(false)) + /// .get_matches_from(vec!["myprog", "do-tests"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + /// [`Command::visible_aliases`]: Command::visible_aliases() + #[must_use] + pub fn aliases(mut self, names: impl IntoIterator<Item = impl Into<Str>>) -> Self { + self.aliases + .extend(names.into_iter().map(|n| (n.into(), false))); + self + } + + /// Add aliases, which function as "hidden" short flag subcommands. + /// + /// These will automatically dispatch as if this subcommand was used. This is more efficient, + /// and easier than creating multiple hidden subcommands as one only needs to check for the + /// existence of this command, and not all variants. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test").short_flag('t') + /// .short_flag_aliases(['a', 'b', 'c'])) + /// .arg(Arg::new("input") + /// .help("the file to add") + /// .required(false)) + /// .get_matches_from(vec!["myprog", "-a"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + #[must_use] + pub fn short_flag_aliases(mut self, names: impl IntoIterator<Item = char>) -> Self { + for s in names { + debug_assert!(s != '-', "short alias name cannot be `-`"); + self.short_flag_aliases.push((s, false)); + } + self + } + + /// Add aliases, which function as "hidden" long flag subcommands. + /// + /// These will automatically dispatch as if this subcommand was used. This is more efficient, + /// and easier than creating multiple hidden subcommands as one only needs to check for the + /// existence of this command, and not all variants. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test").long_flag("test") + /// .long_flag_aliases(["testing", "testall", "test_all"])) + /// .arg(Arg::new("input") + /// .help("the file to add") + /// .required(false)) + /// .get_matches_from(vec!["myprog", "--testing"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + #[must_use] + pub fn long_flag_aliases(mut self, names: impl IntoIterator<Item = impl Into<Str>>) -> Self { + for s in names { + self = self.long_flag_alias(s) + } + self + } + + /// Sets a visible alias to this subcommand. + /// + /// This allows the subcommand to be accessed via *either* the + /// original name or the given alias. This is more efficient and easier + /// than creating hidden subcommands as one only needs to check for + /// the existence of this command and not all aliased variants. + /// + /// **NOTE:** The alias defined with this method is *visible* from the help + /// message and displayed as if it were just another regular subcommand. If + /// looking for an alias that will not be displayed in the help message, see + /// [`Command::alias`]. + /// + /// **NOTE:** When using aliases and checking for the existence of a + /// particular subcommand within an [`ArgMatches`] struct, one only needs to + /// search for the original name and not all aliases. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test") + /// .visible_alias("do-stuff")) + /// .get_matches_from(vec!["myprog", "do-stuff"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + /// [`Command::alias`]: Command::alias() + #[must_use] + pub fn visible_alias(mut self, name: impl IntoResettable<Str>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + self.aliases.push((name, true)); + } else { + self.aliases.clear(); + } + self + } + + /// Add an alias, which functions as "visible" short flag subcommand + /// + /// This will automatically dispatch as if this subcommand was used. This is more efficient, + /// and easier than creating multiple hidden subcommands as one only needs to check for the + /// existence of this command, and not all variants. + /// + /// See also [`Command::short_flag_alias`]. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test").short_flag('t') + /// .visible_short_flag_alias('d')) + /// .get_matches_from(vec!["myprog", "-d"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + /// [`Command::short_flag_alias`]: Command::short_flag_alias() + #[must_use] + pub fn visible_short_flag_alias(mut self, name: impl IntoResettable<char>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + debug_assert!(name != '-', "short alias name cannot be `-`"); + self.short_flag_aliases.push((name, true)); + } else { + self.short_flag_aliases.clear(); + } + self + } + + /// Add an alias, which functions as a "visible" long flag subcommand. + /// + /// This will automatically dispatch as if this subcommand was used. This is more efficient, + /// and easier than creating multiple hidden subcommands as one only needs to check for the + /// existence of this command, and not all variants. + /// + /// See also [`Command::long_flag_alias`]. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test").long_flag("test") + /// .visible_long_flag_alias("testing")) + /// .get_matches_from(vec!["myprog", "--testing"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + /// [`Command::long_flag_alias`]: Command::long_flag_alias() + #[must_use] + pub fn visible_long_flag_alias(mut self, name: impl IntoResettable<Str>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + self.long_flag_aliases.push((name, true)); + } else { + self.long_flag_aliases.clear(); + } + self + } + + /// Sets multiple visible aliases to this subcommand. + /// + /// This allows the subcommand to be accessed via *either* the + /// original name or any of the given aliases. This is more efficient and easier + /// than creating multiple hidden subcommands as one only needs to check for + /// the existence of this command and not all aliased variants. + /// + /// **NOTE:** The alias defined with this method is *visible* from the help + /// message and displayed as if it were just another regular subcommand. If + /// looking for an alias that will not be displayed in the help message, see + /// [`Command::alias`]. + /// + /// **NOTE:** When using aliases, and checking for the existence of a + /// particular subcommand within an [`ArgMatches`] struct, one only needs to + /// search for the original name and not all aliases. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test") + /// .visible_aliases(["do-stuff", "tests"])) + /// .get_matches_from(vec!["myprog", "do-stuff"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + /// [`Command::alias`]: Command::alias() + #[must_use] + pub fn visible_aliases(mut self, names: impl IntoIterator<Item = impl Into<Str>>) -> Self { + self.aliases + .extend(names.into_iter().map(|n| (n.into(), true))); + self + } + + /// Add aliases, which function as *visible* short flag subcommands. + /// + /// See [`Command::short_flag_aliases`]. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test").short_flag('b') + /// .visible_short_flag_aliases(['t'])) + /// .get_matches_from(vec!["myprog", "-t"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + /// [`Command::short_flag_aliases`]: Command::short_flag_aliases() + #[must_use] + pub fn visible_short_flag_aliases(mut self, names: impl IntoIterator<Item = char>) -> Self { + for s in names { + debug_assert!(s != '-', "short alias name cannot be `-`"); + self.short_flag_aliases.push((s, true)); + } + self + } + + /// Add aliases, which function as *visible* long flag subcommands. + /// + /// See [`Command::long_flag_aliases`]. + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg, }; + /// let m = Command::new("myprog") + /// .subcommand(Command::new("test").long_flag("test") + /// .visible_long_flag_aliases(["testing", "testall", "test_all"])) + /// .get_matches_from(vec!["myprog", "--testing"]); + /// assert_eq!(m.subcommand_name(), Some("test")); + /// ``` + /// [`Command::long_flag_aliases`]: Command::long_flag_aliases() + #[must_use] + pub fn visible_long_flag_aliases( + mut self, + names: impl IntoIterator<Item = impl Into<Str>>, + ) -> Self { + for s in names { + self = self.visible_long_flag_alias(s); + } + self + } + + /// Set the placement of this subcommand within the help. + /// + /// Subcommands with a lower value will be displayed first in the help message. Subcommands + /// with duplicate display orders will be displayed in alphabetical order. + /// + /// This is helpful when one would like to emphasize frequently used subcommands, or prioritize + /// those towards the top of the list. + /// + /// **NOTE:** The default is 999 for all subcommands. + /// + /// # Examples + /// + #[cfg_attr(not(feature = "help"), doc = " ```ignore")] + #[cfg_attr(feature = "help", doc = " ```")] + /// # use clap::{Command, }; + /// let m = Command::new("cust-ord") + /// .subcommand(Command::new("alpha") // typically subcommands are grouped + /// // alphabetically by name. Subcommands + /// // without a display_order have a value of + /// // 999 and are displayed alphabetically with + /// // all other 999 subcommands + /// .about("Some help and text")) + /// .subcommand(Command::new("beta") + /// .display_order(1) // In order to force this subcommand to appear *first* + /// // all we have to do is give it a value lower than 999. + /// // Any other subcommands with a value of 1 will be displayed + /// // alphabetically with this one...then 2 values, then 3, etc. + /// .about("I should be first!")) + /// .get_matches_from(vec![ + /// "cust-ord", "--help" + /// ]); + /// ``` + /// + /// The above example displays the following help message + /// + /// ```text + /// cust-ord + /// + /// Usage: cust-ord [OPTIONS] + /// + /// Commands: + /// beta I should be first! + /// alpha Some help and text + /// + /// Options: + /// -h, --help Print help + /// -V, --version Print version + /// ``` + #[inline] + #[must_use] + pub fn display_order(mut self, ord: impl IntoResettable<usize>) -> Self { + self.disp_ord = ord.into_resettable().into_option(); + self + } + + /// Specifies that this [`subcommand`] should be hidden from help messages + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .subcommand( + /// Command::new("test").hide(true) + /// ) + /// # ; + /// ``` + /// + /// [`subcommand`]: crate::Command::subcommand() + #[inline] + pub fn hide(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::Hidden) + } else { + self.unset_setting(AppSettings::Hidden) + } + } + + /// If no [`subcommand`] is present at runtime, error and exit gracefully. + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, error::ErrorKind}; + /// let err = Command::new("myprog") + /// .subcommand_required(true) + /// .subcommand(Command::new("test")) + /// .try_get_matches_from(vec![ + /// "myprog", + /// ]); + /// assert!(err.is_err()); + /// assert_eq!(err.unwrap_err().kind(), ErrorKind::MissingSubcommand); + /// # ; + /// ``` + /// + /// [`subcommand`]: crate::Command::subcommand() + pub fn subcommand_required(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::SubcommandRequired) + } else { + self.unset_setting(AppSettings::SubcommandRequired) + } + } + + /// Assume unexpected positional arguments are a [`subcommand`]. + /// + /// Arguments will be stored in the `""` argument in the [`ArgMatches`] + /// + /// **NOTE:** Use this setting with caution, + /// as a truly unexpected argument (i.e. one that is *NOT* an external subcommand) + /// will **not** cause an error and instead be treated as a potential subcommand. + /// One should check for such cases manually and inform the user appropriately. + /// + /// **NOTE:** A built-in subcommand will be parsed as an external subcommand when escaped with + /// `--`. + /// + /// # Examples + /// + /// ```rust + /// # use std::ffi::OsString; + /// # use clap::Command; + /// // Assume there is an external subcommand named "subcmd" + /// let m = Command::new("myprog") + /// .allow_external_subcommands(true) + /// .get_matches_from(vec![ + /// "myprog", "subcmd", "--option", "value", "-fff", "--flag" + /// ]); + /// + /// // All trailing arguments will be stored under the subcommand's sub-matches using an empty + /// // string argument name + /// match m.subcommand() { + /// Some((external, ext_m)) => { + /// let ext_args: Vec<_> = ext_m.get_many::<OsString>("").unwrap().collect(); + /// assert_eq!(external, "subcmd"); + /// assert_eq!(ext_args, ["--option", "value", "-fff", "--flag"]); + /// }, + /// _ => {}, + /// } + /// ``` + /// + /// [`subcommand`]: crate::Command::subcommand() + /// [`ArgMatches`]: crate::ArgMatches + /// [`ErrorKind::UnknownArgument`]: crate::error::ErrorKind::UnknownArgument + pub fn allow_external_subcommands(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::AllowExternalSubcommands) + } else { + self.unset_setting(AppSettings::AllowExternalSubcommands) + } + } + + /// Specifies how to parse external subcommand arguments. + /// + /// The default parser is for `OsString`. This can be used to switch it to `String` or another + /// type. + /// + /// **NOTE:** Setting this requires [`Command::allow_external_subcommands`] + /// + /// # Examples + /// + #[cfg_attr(not(unix), doc = " ```ignore")] + #[cfg_attr(unix, doc = " ```")] + /// # use std::ffi::OsString; + /// # use clap::Command; + /// # use clap::value_parser; + /// // Assume there is an external subcommand named "subcmd" + /// let m = Command::new("myprog") + /// .allow_external_subcommands(true) + /// .get_matches_from(vec![ + /// "myprog", "subcmd", "--option", "value", "-fff", "--flag" + /// ]); + /// + /// // All trailing arguments will be stored under the subcommand's sub-matches using an empty + /// // string argument name + /// match m.subcommand() { + /// Some((external, ext_m)) => { + /// let ext_args: Vec<_> = ext_m.get_many::<OsString>("").unwrap().collect(); + /// assert_eq!(external, "subcmd"); + /// assert_eq!(ext_args, ["--option", "value", "-fff", "--flag"]); + /// }, + /// _ => {}, + /// } + /// ``` + /// + /// ``` + /// # use clap::Command; + /// # use clap::value_parser; + /// // Assume there is an external subcommand named "subcmd" + /// let m = Command::new("myprog") + /// .external_subcommand_value_parser(value_parser!(String)) + /// .get_matches_from(vec![ + /// "myprog", "subcmd", "--option", "value", "-fff", "--flag" + /// ]); + /// + /// // All trailing arguments will be stored under the subcommand's sub-matches using an empty + /// // string argument name + /// match m.subcommand() { + /// Some((external, ext_m)) => { + /// let ext_args: Vec<_> = ext_m.get_many::<String>("").unwrap().collect(); + /// assert_eq!(external, "subcmd"); + /// assert_eq!(ext_args, ["--option", "value", "-fff", "--flag"]); + /// }, + /// _ => {}, + /// } + /// ``` + /// + /// [`subcommands`]: crate::Command::subcommand() + pub fn external_subcommand_value_parser( + mut self, + parser: impl IntoResettable<super::ValueParser>, + ) -> Self { + self.external_value_parser = parser.into_resettable().into_option(); + self + } + + /// Specifies that use of an argument prevents the use of [`subcommands`]. + /// + /// By default `clap` allows arguments between subcommands such + /// as `<cmd> [cmd_args] <subcmd> [subcmd_args] <subsubcmd> [subsubcmd_args]`. + /// + /// This setting disables that functionality and says that arguments can + /// only follow the *final* subcommand. For instance using this setting + /// makes only the following invocations possible: + /// + /// * `<cmd> <subcmd> <subsubcmd> [subsubcmd_args]` + /// * `<cmd> <subcmd> [subcmd_args]` + /// * `<cmd> [cmd_args]` + /// + /// # Examples + /// + /// ```rust + /// # use clap::Command; + /// Command::new("myprog") + /// .args_conflicts_with_subcommands(true); + /// ``` + /// + /// [`subcommands`]: crate::Command::subcommand() + pub fn args_conflicts_with_subcommands(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::ArgsNegateSubcommands) + } else { + self.unset_setting(AppSettings::ArgsNegateSubcommands) + } + } + + /// Prevent subcommands from being consumed as an arguments value. + /// + /// By default, if an option taking multiple values is followed by a subcommand, the + /// subcommand will be parsed as another value. + /// + /// ```text + /// cmd --foo val1 val2 subcommand + /// --------- ---------- + /// values another value + /// ``` + /// + /// This setting instructs the parser to stop when encountering a subcommand instead of + /// greedily consuming arguments. + /// + /// ```text + /// cmd --foo val1 val2 subcommand + /// --------- ---------- + /// values subcommand + /// ``` + /// + /// # Examples + /// + /// ```rust + /// # use clap::{Command, Arg, ArgAction}; + /// let cmd = Command::new("cmd").subcommand(Command::new("sub")).arg( + /// Arg::new("arg") + /// .long("arg") + /// .num_args(1..) + /// .action(ArgAction::Set), + /// ); + /// + /// let matches = cmd + /// .clone() + /// .try_get_matches_from(&["cmd", "--arg", "1", "2", "3", "sub"]) + /// .unwrap(); + /// assert_eq!( + /// matches.get_many::<String>("arg").unwrap().collect::<Vec<_>>(), + /// &["1", "2", "3", "sub"] + /// ); + /// assert!(matches.subcommand_matches("sub").is_none()); + /// + /// let matches = cmd + /// .subcommand_precedence_over_arg(true) + /// .try_get_matches_from(&["cmd", "--arg", "1", "2", "3", "sub"]) + /// .unwrap(); + /// assert_eq!( + /// matches.get_many::<String>("arg").unwrap().collect::<Vec<_>>(), + /// &["1", "2", "3"] + /// ); + /// assert!(matches.subcommand_matches("sub").is_some()); + /// ``` + pub fn subcommand_precedence_over_arg(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::SubcommandPrecedenceOverArg) + } else { + self.unset_setting(AppSettings::SubcommandPrecedenceOverArg) + } + } + + /// Allows [`subcommands`] to override all requirements of the parent command. + /// + /// For example, if you had a subcommand or top level application with a required argument + /// that is only required as long as there is no subcommand present, + /// using this setting would allow you to set those arguments to [`Arg::required(true)`] + /// and yet receive no error so long as the user uses a valid subcommand instead. + /// + /// **NOTE:** This defaults to false (using subcommand does *not* negate requirements) + /// + /// # Examples + /// + /// This first example shows that it is an error to not use a required argument + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind}; + /// let err = Command::new("myprog") + /// .subcommand_negates_reqs(true) + /// .arg(Arg::new("opt").required(true)) + /// .subcommand(Command::new("test")) + /// .try_get_matches_from(vec![ + /// "myprog" + /// ]); + /// assert!(err.is_err()); + /// assert_eq!(err.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); + /// # ; + /// ``` + /// + /// This next example shows that it is no longer error to not use a required argument if a + /// valid subcommand is used. + /// + /// ```rust + /// # use clap::{Command, Arg, error::ErrorKind}; + /// let noerr = Command::new("myprog") + /// .subcommand_negates_reqs(true) + /// .arg(Arg::new("opt").required(true)) + /// .subcommand(Command::new("test")) + /// .try_get_matches_from(vec![ + /// "myprog", "test" + /// ]); + /// assert!(noerr.is_ok()); + /// # ; + /// ``` + /// + /// [`Arg::required(true)`]: crate::Arg::required() + /// [`subcommands`]: crate::Command::subcommand() + pub fn subcommand_negates_reqs(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::SubcommandsNegateReqs) + } else { + self.unset_setting(AppSettings::SubcommandsNegateReqs) + } + } + + /// Multiple-personality program dispatched on the binary name (`argv[0]`) + /// + /// A "multicall" executable is a single executable + /// that contains a variety of applets, + /// and decides which applet to run based on the name of the file. + /// The executable can be called from different names by creating hard links + /// or symbolic links to it. + /// + /// This is desirable for: + /// - Easy distribution, a single binary that can install hardlinks to access the different + /// personalities. + /// - Minimal binary size by sharing common code (e.g. standard library, clap) + /// - Custom shells or REPLs where there isn't a single top-level command + /// + /// Setting `multicall` will cause + /// - `argv[0]` to be stripped to the base name and parsed as the first argument, as if + /// [`Command::no_binary_name`][Command::no_binary_name] was set. + /// - Help and errors to report subcommands as if they were the top-level command + /// + /// When the subcommand is not present, there are several strategies you may employ, depending + /// on your needs: + /// - Let the error percolate up normally + /// - Print a specialized error message using the + /// [`Error::context`][crate::Error::context] + /// - Print the [help][Command::write_help] but this might be ambiguous + /// - Disable `multicall` and re-parse it + /// - Disable `multicall` and re-parse it with a specific subcommand + /// + /// When detecting the error condition, the [`ErrorKind`] isn't sufficient as a sub-subcommand + /// might report the same error. Enable + /// [`allow_external_subcommands`][Command::allow_external_subcommands] if you want to specifically + /// get the unrecognized binary name. + /// + /// **NOTE:** Multicall can't be used with [`no_binary_name`] since they interpret + /// the command name in incompatible ways. + /// + /// **NOTE:** The multicall command cannot have arguments. + /// + /// **NOTE:** Applets are slightly semantically different from subcommands, + /// so it's recommended to use [`Command::subcommand_help_heading`] and + /// [`Command::subcommand_value_name`] to change the descriptive text as above. + /// + /// # Examples + /// + /// `hostname` is an example of a multicall executable. + /// Both `hostname` and `dnsdomainname` are provided by the same executable + /// and which behaviour to use is based on the executable file name. + /// + /// This is desirable when the executable has a primary purpose + /// but there is related functionality that would be convenient to provide + /// and implement it to be in the same executable. + /// + /// The name of the cmd is essentially unused + /// and may be the same as the name of a subcommand. + /// + /// The names of the immediate subcommands of the Command + /// are matched against the basename of the first argument, + /// which is conventionally the path of the executable. + /// + /// This does not allow the subcommand to be passed as the first non-path argument. + /// + /// ```rust + /// # use clap::{Command, error::ErrorKind}; + /// let mut cmd = Command::new("hostname") + /// .multicall(true) + /// .subcommand(Command::new("hostname")) + /// .subcommand(Command::new("dnsdomainname")); + /// let m = cmd.try_get_matches_from_mut(&["/usr/bin/hostname", "dnsdomainname"]); + /// assert!(m.is_err()); + /// assert_eq!(m.unwrap_err().kind(), ErrorKind::UnknownArgument); + /// let m = cmd.get_matches_from(&["/usr/bin/dnsdomainname"]); + /// assert_eq!(m.subcommand_name(), Some("dnsdomainname")); + /// ``` + /// + /// Busybox is another common example of a multicall executable + /// with a subcommmand for each applet that can be run directly, + /// e.g. with the `cat` applet being run by running `busybox cat`, + /// or with `cat` as a link to the `busybox` binary. + /// + /// This is desirable when the launcher program has additional options + /// or it is useful to run the applet without installing a symlink + /// e.g. to test the applet without installing it + /// or there may already be a command of that name installed. + /// + /// To make an applet usable as both a multicall link and a subcommand + /// the subcommands must be defined both in the top-level Command + /// and as subcommands of the "main" applet. + /// + /// ```rust + /// # use clap::Command; + /// fn applet_commands() -> [Command; 2] { + /// [Command::new("true"), Command::new("false")] + /// } + /// let mut cmd = Command::new("busybox") + /// .multicall(true) + /// .subcommand( + /// Command::new("busybox") + /// .subcommand_value_name("APPLET") + /// .subcommand_help_heading("APPLETS") + /// .subcommands(applet_commands()), + /// ) + /// .subcommands(applet_commands()); + /// // When called from the executable's canonical name + /// // its applets can be matched as subcommands. + /// let m = cmd.try_get_matches_from_mut(&["/usr/bin/busybox", "true"]).unwrap(); + /// assert_eq!(m.subcommand_name(), Some("busybox")); + /// assert_eq!(m.subcommand().unwrap().1.subcommand_name(), Some("true")); + /// // When called from a link named after an applet that applet is matched. + /// let m = cmd.get_matches_from(&["/usr/bin/true"]); + /// assert_eq!(m.subcommand_name(), Some("true")); + /// ``` + /// + /// [`no_binary_name`]: crate::Command::no_binary_name + /// [`Command::subcommand_value_name`]: crate::Command::subcommand_value_name + /// [`Command::subcommand_help_heading`]: crate::Command::subcommand_help_heading + #[inline] + pub fn multicall(self, yes: bool) -> Self { + if yes { + self.setting(AppSettings::Multicall) + } else { + self.unset_setting(AppSettings::Multicall) + } + } + + /// Sets the value name used for subcommands when printing usage and help. + /// + /// By default, this is "COMMAND". + /// + /// See also [`Command::subcommand_help_heading`] + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .subcommand(Command::new("sub1")) + /// .print_help() + /// # ; + /// ``` + /// + /// will produce + /// + /// ```text + /// myprog + /// + /// Usage: myprog [COMMAND] + /// + /// Commands: + /// help Print this message or the help of the given subcommand(s) + /// sub1 + /// + /// Options: + /// -h, --help Print help + /// -V, --version Print version + /// ``` + /// + /// but usage of `subcommand_value_name` + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .subcommand(Command::new("sub1")) + /// .subcommand_value_name("THING") + /// .print_help() + /// # ; + /// ``` + /// + /// will produce + /// + /// ```text + /// myprog + /// + /// Usage: myprog [THING] + /// + /// Commands: + /// help Print this message or the help of the given subcommand(s) + /// sub1 + /// + /// Options: + /// -h, --help Print help + /// -V, --version Print version + /// ``` + #[must_use] + pub fn subcommand_value_name(mut self, value_name: impl IntoResettable<Str>) -> Self { + self.subcommand_value_name = value_name.into_resettable().into_option(); + self + } + + /// Sets the help heading used for subcommands when printing usage and help. + /// + /// By default, this is "Commands". + /// + /// See also [`Command::subcommand_value_name`] + /// + /// # Examples + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .subcommand(Command::new("sub1")) + /// .print_help() + /// # ; + /// ``` + /// + /// will produce + /// + /// ```text + /// myprog + /// + /// Usage: myprog [COMMAND] + /// + /// Commands: + /// help Print this message or the help of the given subcommand(s) + /// sub1 + /// + /// Options: + /// -h, --help Print help + /// -V, --version Print version + /// ``` + /// + /// but usage of `subcommand_help_heading` + /// + /// ```no_run + /// # use clap::{Command, Arg}; + /// Command::new("myprog") + /// .subcommand(Command::new("sub1")) + /// .subcommand_help_heading("Things") + /// .print_help() + /// # ; + /// ``` + /// + /// will produce + /// + /// ```text + /// myprog + /// + /// Usage: myprog [COMMAND] + /// + /// Things: + /// help Print this message or the help of the given subcommand(s) + /// sub1 + /// + /// Options: + /// -h, --help Print help + /// -V, --version Print version + /// ``` + #[must_use] + pub fn subcommand_help_heading(mut self, heading: impl IntoResettable<Str>) -> Self { + self.subcommand_heading = heading.into_resettable().into_option(); + self + } +} + +/// # Reflection +impl Command { + #[inline] + #[cfg(feature = "usage")] + pub(crate) fn get_usage_name(&self) -> Option<&str> { + self.usage_name.as_deref() + } + + /// Get the name of the binary. + #[inline] + pub fn get_display_name(&self) -> Option<&str> { + self.display_name.as_deref() + } + + /// Get the name of the binary. + #[inline] + pub fn get_bin_name(&self) -> Option<&str> { + self.bin_name.as_deref() + } + + /// Set binary name. Uses `&mut self` instead of `self`. + pub fn set_bin_name(&mut self, name: impl Into<String>) { + self.bin_name = Some(name.into()); + } + + /// Get the name of the cmd. + #[inline] + pub fn get_name(&self) -> &str { + self.name.as_str() + } + + #[inline] + #[cfg(debug_assertions)] + pub(crate) fn get_name_str(&self) -> &Str { + &self.name + } + + /// Get the version of the cmd. + #[inline] + pub fn get_version(&self) -> Option<&str> { + self.version.as_deref() + } + + /// Get the long version of the cmd. + #[inline] + pub fn get_long_version(&self) -> Option<&str> { + self.long_version.as_deref() + } + + /// Get the authors of the cmd. + #[inline] + pub fn get_author(&self) -> Option<&str> { + self.author.as_deref() + } + + /// Get the short flag of the subcommand. + #[inline] + pub fn get_short_flag(&self) -> Option<char> { + self.short_flag + } + + /// Get the long flag of the subcommand. + #[inline] + pub fn get_long_flag(&self) -> Option<&str> { + self.long_flag.as_deref() + } + + /// Get the help message specified via [`Command::about`]. + /// + /// [`Command::about`]: Command::about() + #[inline] + pub fn get_about(&self) -> Option<&StyledStr> { + self.about.as_ref() + } + + /// Get the help message specified via [`Command::long_about`]. + /// + /// [`Command::long_about`]: Command::long_about() + #[inline] + pub fn get_long_about(&self) -> Option<&StyledStr> { + self.long_about.as_ref() + } + + /// Get the custom section heading specified via [`Command::next_help_heading`]. + /// + /// [`Command::help_heading`]: Command::help_heading() + #[inline] + pub fn get_next_help_heading(&self) -> Option<&str> { + self.current_help_heading.as_deref() + } + + /// Iterate through the *visible* aliases for this subcommand. + #[inline] + pub fn get_visible_aliases(&self) -> impl Iterator<Item = &str> + '_ { + self.aliases + .iter() + .filter(|(_, vis)| *vis) + .map(|a| a.0.as_str()) + } + + /// Iterate through the *visible* short aliases for this subcommand. + #[inline] + pub fn get_visible_short_flag_aliases(&self) -> impl Iterator<Item = char> + '_ { + self.short_flag_aliases + .iter() + .filter(|(_, vis)| *vis) + .map(|a| a.0) + } + + /// Iterate through the *visible* long aliases for this subcommand. + #[inline] + pub fn get_visible_long_flag_aliases(&self) -> impl Iterator<Item = &str> + '_ { + self.long_flag_aliases + .iter() + .filter(|(_, vis)| *vis) + .map(|a| a.0.as_str()) + } + + /// Iterate through the set of *all* the aliases for this subcommand, both visible and hidden. + #[inline] + pub fn get_all_aliases(&self) -> impl Iterator<Item = &str> + '_ { + self.aliases.iter().map(|a| a.0.as_str()) + } + + /// Iterate through the set of *all* the short aliases for this subcommand, both visible and hidden. + #[inline] + pub fn get_all_short_flag_aliases(&self) -> impl Iterator<Item = char> + '_ { + self.short_flag_aliases.iter().map(|a| a.0) + } + + /// Iterate through the set of *all* the long aliases for this subcommand, both visible and hidden. + #[inline] + pub fn get_all_long_flag_aliases(&self) -> impl Iterator<Item = &str> + '_ { + self.long_flag_aliases.iter().map(|a| a.0.as_str()) + } + + #[inline] + pub(crate) fn is_set(&self, s: AppSettings) -> bool { + self.settings.is_set(s) || self.g_settings.is_set(s) + } + + /// Should we color the output? + pub fn get_color(&self) -> ColorChoice { + debug!("Command::color: Color setting..."); + + if cfg!(feature = "color") { + if self.is_set(AppSettings::ColorNever) { + debug!("Never"); + ColorChoice::Never + } else if self.is_set(AppSettings::ColorAlways) { + debug!("Always"); + ColorChoice::Always + } else { + debug!("Auto"); + ColorChoice::Auto + } + } else { + ColorChoice::Never + } + } + + /// Iterate through the set of subcommands, getting a reference to each. + #[inline] + pub fn get_subcommands(&self) -> impl Iterator<Item = &Command> { + self.subcommands.iter() + } + + /// Iterate through the set of subcommands, getting a mutable reference to each. + #[inline] + pub fn get_subcommands_mut(&mut self) -> impl Iterator<Item = &mut Command> { + self.subcommands.iter_mut() + } + + /// Returns `true` if this `Command` has subcommands. + #[inline] + pub fn has_subcommands(&self) -> bool { + !self.subcommands.is_empty() + } + + /// Returns the help heading for listing subcommands. + #[inline] + pub fn get_subcommand_help_heading(&self) -> Option<&str> { + self.subcommand_heading.as_deref() + } + + /// Returns the subcommand value name. + #[inline] + pub fn get_subcommand_value_name(&self) -> Option<&str> { + self.subcommand_value_name.as_deref() + } + + /// Returns the help heading for listing subcommands. + #[inline] + pub fn get_before_help(&self) -> Option<&StyledStr> { + self.before_help.as_ref() + } + + /// Returns the help heading for listing subcommands. + #[inline] + pub fn get_before_long_help(&self) -> Option<&StyledStr> { + self.before_long_help.as_ref() + } + + /// Returns the help heading for listing subcommands. + #[inline] + pub fn get_after_help(&self) -> Option<&StyledStr> { + self.after_help.as_ref() + } + + /// Returns the help heading for listing subcommands. + #[inline] + pub fn get_after_long_help(&self) -> Option<&StyledStr> { + self.after_long_help.as_ref() + } + + /// Find subcommand such that its name or one of aliases equals `name`. + /// + /// This does not recurse through subcommands of subcommands. + #[inline] + pub fn find_subcommand(&self, name: impl AsRef<std::ffi::OsStr>) -> Option<&Command> { + let name = name.as_ref(); + self.get_subcommands().find(|s| s.aliases_to(name)) + } + + /// Find subcommand such that its name or one of aliases equals `name`, returning + /// a mutable reference to the subcommand. + /// + /// This does not recurse through subcommands of subcommands. + #[inline] + pub fn find_subcommand_mut( + &mut self, + name: impl AsRef<std::ffi::OsStr>, + ) -> Option<&mut Command> { + let name = name.as_ref(); + self.get_subcommands_mut().find(|s| s.aliases_to(name)) + } + + /// Iterate through the set of groups. + #[inline] + pub fn get_groups(&self) -> impl Iterator<Item = &ArgGroup> { + self.groups.iter() + } + + /// Iterate through the set of arguments. + #[inline] + pub fn get_arguments(&self) -> impl Iterator<Item = &Arg> { + self.args.args() + } + + /// Iterate through the *positionals* arguments. + #[inline] + pub fn get_positionals(&self) -> impl Iterator<Item = &Arg> { + self.get_arguments().filter(|a| a.is_positional()) + } + + /// Iterate through the *options*. + pub fn get_opts(&self) -> impl Iterator<Item = &Arg> { + self.get_arguments() + .filter(|a| a.is_takes_value_set() && !a.is_positional()) + } + + /// Get a list of all arguments the given argument conflicts with. + /// + /// If the provided argument is declared as global, the conflicts will be determined + /// based on the propagation rules of global arguments. + /// + /// ### Panics + /// + /// If the given arg contains a conflict with an argument that is unknown to + /// this `Command`. + pub fn get_arg_conflicts_with(&self, arg: &Arg) -> Vec<&Arg> // FIXME: This could probably have been an iterator + { + if arg.is_global_set() { + self.get_global_arg_conflicts_with(arg) + } else { + let mut result = Vec::new(); + for id in arg.blacklist.iter() { + if let Some(arg) = self.find(id) { + result.push(arg); + } else if let Some(group) = self.find_group(id) { + result.extend( + self.unroll_args_in_group(&group.id) + .iter() + .map(|id| self.find(id).expect(INTERNAL_ERROR_MSG)), + ); + } else { + panic!("Command::get_arg_conflicts_with: The passed arg conflicts with an arg unknown to the cmd"); + } + } + result + } + } + + // Get a unique list of all arguments of all commands and continuous subcommands the given argument conflicts with. + // + // This behavior follows the propagation rules of global arguments. + // It is useful for finding conflicts for arguments declared as global. + // + // ### Panics + // + // If the given arg contains a conflict with an argument that is unknown to + // this `Command`. + fn get_global_arg_conflicts_with(&self, arg: &Arg) -> Vec<&Arg> // FIXME: This could probably have been an iterator + { + arg.blacklist + .iter() + .map(|id| { + self.args + .args() + .chain( + self.get_subcommands_containing(arg) + .iter() + .flat_map(|x| x.args.args()), + ) + .find(|arg| arg.get_id() == id) + .expect( + "Command::get_arg_conflicts_with: \ + The passed arg conflicts with an arg unknown to the cmd", + ) + }) + .collect() + } + + // Get a list of subcommands which contain the provided Argument + // + // This command will only include subcommands in its list for which the subcommands + // parent also contains the Argument. + // + // This search follows the propagation rules of global arguments. + // It is useful to finding subcommands, that have inherited a global argument. + // + // **NOTE:** In this case only Sucommand_1 will be included + // Subcommand_1 (contains Arg) + // Subcommand_1.1 (doesn't contain Arg) + // Subcommand_1.1.1 (contains Arg) + // + fn get_subcommands_containing(&self, arg: &Arg) -> Vec<&Self> { + let mut vec = std::vec::Vec::new(); + for idx in 0..self.subcommands.len() { + if self.subcommands[idx] + .args + .args() + .any(|ar| ar.get_id() == arg.get_id()) + { + vec.push(&self.subcommands[idx]); + vec.append(&mut self.subcommands[idx].get_subcommands_containing(arg)); + } + } + vec + } + + /// Report whether [`Command::no_binary_name`] is set + pub fn is_no_binary_name_set(&self) -> bool { + self.is_set(AppSettings::NoBinaryName) + } + + /// Report whether [`Command::ignore_errors`] is set + pub(crate) fn is_ignore_errors_set(&self) -> bool { + self.is_set(AppSettings::IgnoreErrors) + } + + /// Report whether [`Command::dont_delimit_trailing_values`] is set + pub fn is_dont_delimit_trailing_values_set(&self) -> bool { + self.is_set(AppSettings::DontDelimitTrailingValues) + } + + /// Report whether [`Command::disable_version_flag`] is set + pub fn is_disable_version_flag_set(&self) -> bool { + self.is_set(AppSettings::DisableVersionFlag) + || (self.version.is_none() && self.long_version.is_none()) + } + + /// Report whether [`Command::propagate_version`] is set + pub fn is_propagate_version_set(&self) -> bool { + self.is_set(AppSettings::PropagateVersion) + } + + /// Report whether [`Command::next_line_help`] is set + pub fn is_next_line_help_set(&self) -> bool { + self.is_set(AppSettings::NextLineHelp) + } + + /// Report whether [`Command::disable_help_flag`] is set + pub fn is_disable_help_flag_set(&self) -> bool { + self.is_set(AppSettings::DisableHelpFlag) + } + + /// Report whether [`Command::disable_help_subcommand`] is set + pub fn is_disable_help_subcommand_set(&self) -> bool { + self.is_set(AppSettings::DisableHelpSubcommand) + } + + /// Report whether [`Command::disable_colored_help`] is set + pub fn is_disable_colored_help_set(&self) -> bool { + self.is_set(AppSettings::DisableColoredHelp) + } + + /// Report whether [`Command::help_expected`] is set + #[cfg(debug_assertions)] + pub(crate) fn is_help_expected_set(&self) -> bool { + self.is_set(AppSettings::HelpExpected) + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "This is now the default") + )] + pub fn is_dont_collapse_args_in_usage_set(&self) -> bool { + true + } + + /// Report whether [`Command::infer_long_args`] is set + pub(crate) fn is_infer_long_args_set(&self) -> bool { + self.is_set(AppSettings::InferLongArgs) + } + + /// Report whether [`Command::infer_subcommands`] is set + pub(crate) fn is_infer_subcommands_set(&self) -> bool { + self.is_set(AppSettings::InferSubcommands) + } + + /// Report whether [`Command::arg_required_else_help`] is set + pub fn is_arg_required_else_help_set(&self) -> bool { + self.is_set(AppSettings::ArgRequiredElseHelp) + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated( + since = "4.0.0", + note = "Replaced with `Arg::is_allow_hyphen_values_set`" + ) + )] + pub(crate) fn is_allow_hyphen_values_set(&self) -> bool { + self.is_set(AppSettings::AllowHyphenValues) + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated( + since = "4.0.0", + note = "Replaced with `Arg::is_allow_negative_numbers_set`" + ) + )] + pub fn is_allow_negative_numbers_set(&self) -> bool { + self.is_set(AppSettings::AllowNegativeNumbers) + } + + #[doc(hidden)] + #[cfg_attr( + feature = "deprecated", + deprecated(since = "4.0.0", note = "Replaced with `Arg::is_trailing_var_arg_set`") + )] + pub fn is_trailing_var_arg_set(&self) -> bool { + self.is_set(AppSettings::TrailingVarArg) + } + + /// Report whether [`Command::allow_missing_positional`] is set + pub fn is_allow_missing_positional_set(&self) -> bool { + self.is_set(AppSettings::AllowMissingPositional) + } + + /// Report whether [`Command::hide`] is set + pub fn is_hide_set(&self) -> bool { + self.is_set(AppSettings::Hidden) + } + + /// Report whether [`Command::subcommand_required`] is set + pub fn is_subcommand_required_set(&self) -> bool { + self.is_set(AppSettings::SubcommandRequired) + } + + /// Report whether [`Command::allow_external_subcommands`] is set + pub fn is_allow_external_subcommands_set(&self) -> bool { + self.is_set(AppSettings::AllowExternalSubcommands) + } + + /// Configured parser for values passed to an external subcommand + /// + /// # Example + /// + /// ```rust + /// let cmd = clap::Command::new("raw") + /// .external_subcommand_value_parser(clap::value_parser!(String)); + /// let value_parser = cmd.get_external_subcommand_value_parser(); + /// println!("{:?}", value_parser); + /// ``` + pub fn get_external_subcommand_value_parser(&self) -> Option<&super::ValueParser> { + if !self.is_allow_external_subcommands_set() { + None + } else { + static DEFAULT: super::ValueParser = super::ValueParser::os_string(); + Some(self.external_value_parser.as_ref().unwrap_or(&DEFAULT)) + } + } + + /// Report whether [`Command::args_conflicts_with_subcommands`] is set + pub fn is_args_conflicts_with_subcommands_set(&self) -> bool { + self.is_set(AppSettings::ArgsNegateSubcommands) + } + + #[doc(hidden)] + pub fn is_args_override_self(&self) -> bool { + self.is_set(AppSettings::AllArgsOverrideSelf) + } + + /// Report whether [`Command::subcommand_precedence_over_arg`] is set + pub fn is_subcommand_precedence_over_arg_set(&self) -> bool { + self.is_set(AppSettings::SubcommandPrecedenceOverArg) + } + + /// Report whether [`Command::subcommand_negates_reqs`] is set + pub fn is_subcommand_negates_reqs_set(&self) -> bool { + self.is_set(AppSettings::SubcommandsNegateReqs) + } + + /// Report whether [`Command::multicall`] is set + pub fn is_multicall_set(&self) -> bool { + self.is_set(AppSettings::Multicall) + } +} + +// Internally used only +impl Command { + pub(crate) fn get_override_usage(&self) -> Option<&StyledStr> { + self.usage_str.as_ref() + } + + pub(crate) fn get_override_help(&self) -> Option<&StyledStr> { + self.help_str.as_ref() + } + + #[cfg(feature = "help")] + pub(crate) fn get_help_template(&self) -> Option<&StyledStr> { + self.template.as_ref() + } + + #[cfg(feature = "help")] + pub(crate) fn get_term_width(&self) -> Option<usize> { + self.term_w + } + + #[cfg(feature = "help")] + pub(crate) fn get_max_term_width(&self) -> Option<usize> { + self.max_w + } + + pub(crate) fn get_replacement(&self, key: &str) -> Option<&[Str]> { + self.replacers.get(key).map(|v| v.as_slice()) + } + + pub(crate) fn get_keymap(&self) -> &MKeyMap { + &self.args + } + + fn get_used_global_args(&self, matches: &ArgMatches, global_arg_vec: &mut Vec<Id>) { + global_arg_vec.extend( + self.args + .args() + .filter(|a| a.is_global_set()) + .map(|ga| ga.id.clone()), + ); + if let Some((id, matches)) = matches.subcommand() { + if let Some(used_sub) = self.find_subcommand(id) { + used_sub.get_used_global_args(matches, global_arg_vec); + } + } + } + + fn _do_parse( + &mut self, + raw_args: &mut clap_lex::RawArgs, + args_cursor: clap_lex::ArgCursor, + ) -> ClapResult<ArgMatches> { + debug!("Command::_do_parse"); + + // If there are global arguments, or settings we need to propagate them down to subcommands + // before parsing in case we run into a subcommand + self._build_self(false); + + let mut matcher = ArgMatcher::new(self); + + // do the real parsing + let mut parser = Parser::new(self); + if let Err(error) = parser.get_matches_with(&mut matcher, raw_args, args_cursor) { + if self.is_set(AppSettings::IgnoreErrors) { + debug!("Command::_do_parse: ignoring error: {}", error); + } else { + return Err(error); + } + } + + let mut global_arg_vec = Default::default(); + self.get_used_global_args(&matcher, &mut global_arg_vec); + + matcher.propagate_globals(&global_arg_vec); + + Ok(matcher.into_inner()) + } + + /// Prepare for introspecting on all included [`Command`]s + /// + /// Call this on the top-level [`Command`] when done building and before reading state for + /// cases like completions, custom help output, etc. + pub fn build(&mut self) { + self._build_recursive(true); + self._build_bin_names_internal(); + } + + pub(crate) fn _build_recursive(&mut self, expand_help_tree: bool) { + self._build_self(expand_help_tree); + for subcmd in self.get_subcommands_mut() { + subcmd._build_recursive(expand_help_tree); + } + } + + pub(crate) fn _build_self(&mut self, expand_help_tree: bool) { + debug!("Command::_build: name={:?}", self.get_name()); + if !self.settings.is_set(AppSettings::Built) { + // Make sure all the globally set flags apply to us as well + self.settings = self.settings | self.g_settings; + + if self.is_multicall_set() { + self.settings.insert(AppSettings::SubcommandRequired.into()); + self.settings.insert(AppSettings::DisableHelpFlag.into()); + self.settings.insert(AppSettings::DisableVersionFlag.into()); + } + if !cfg!(feature = "help") && self.get_override_help().is_none() { + self.settings.insert(AppSettings::DisableHelpFlag.into()); + self.settings + .insert(AppSettings::DisableHelpSubcommand.into()); + } + if self.is_set(AppSettings::ArgsNegateSubcommands) { + self.settings + .insert(AppSettings::SubcommandsNegateReqs.into()); + } + if self.external_value_parser.is_some() { + self.settings + .insert(AppSettings::AllowExternalSubcommands.into()); + } + if !self.has_subcommands() { + self.settings + .insert(AppSettings::DisableHelpSubcommand.into()); + } + + self._propagate(); + self._check_help_and_version(expand_help_tree); + self._propagate_global_args(); + + let mut pos_counter = 1; + let hide_pv = self.is_set(AppSettings::HidePossibleValues); + for a in self.args.args_mut() { + // Fill in the groups + for g in &a.groups { + if let Some(ag) = self.groups.iter_mut().find(|grp| grp.id == *g) { + ag.args.push(a.get_id().clone()); + } else { + let mut ag = ArgGroup::new(g); + ag.args.push(a.get_id().clone()); + self.groups.push(ag); + } + } + + // Figure out implied settings + a._build(); + if hide_pv && a.is_takes_value_set() { + a.settings.set(ArgSettings::HidePossibleValues); + } + if a.is_positional() && a.index.is_none() { + a.index = Some(pos_counter); + pos_counter += 1; + } + } + + self.args._build(); + + #[allow(deprecated)] + { + let highest_idx = self + .get_keymap() + .keys() + .filter_map(|x| { + if let crate::mkeymap::KeyType::Position(n) = x { + Some(*n) + } else { + None + } + }) + .max() + .unwrap_or(0); + let is_trailing_var_arg_set = self.is_trailing_var_arg_set(); + let is_allow_hyphen_values_set = self.is_allow_hyphen_values_set(); + let is_allow_negative_numbers_set = self.is_allow_negative_numbers_set(); + for arg in self.args.args_mut() { + if is_allow_hyphen_values_set && arg.is_takes_value_set() { + arg.settings.insert(ArgSettings::AllowHyphenValues.into()); + } + if is_allow_negative_numbers_set && arg.is_takes_value_set() { + arg.settings + .insert(ArgSettings::AllowNegativeNumbers.into()); + } + if is_trailing_var_arg_set && arg.get_index() == Some(highest_idx) { + arg.settings.insert(ArgSettings::TrailingVarArg.into()); + } + } + } + + #[cfg(debug_assertions)] + assert_app(self); + self.settings.set(AppSettings::Built); + } else { + debug!("Command::_build: already built"); + } + } + + pub(crate) fn _build_subcommand(&mut self, name: &str) -> Option<&mut Self> { + use std::fmt::Write; + + let mut mid_string = String::from(" "); + #[cfg(feature = "usage")] + if !self.is_subcommand_negates_reqs_set() && !self.is_args_conflicts_with_subcommands_set() + { + let reqs = Usage::new(self).get_required_usage_from(&[], None, true); // maybe Some(m) + + for s in &reqs { + mid_string.push_str(&s.to_string()); + mid_string.push(' '); + } + } + let is_multicall_set = self.is_multicall_set(); + + let sc = some!(self.subcommands.iter_mut().find(|s| s.name == name)); + + // Display subcommand name, short and long in usage + let mut sc_names = String::new(); + sc_names.push_str(sc.name.as_str()); + let mut flag_subcmd = false; + if let Some(l) = sc.get_long_flag() { + write!(sc_names, "|--{}", l).unwrap(); + flag_subcmd = true; + } + if let Some(s) = sc.get_short_flag() { + write!(sc_names, "|-{}", s).unwrap(); + flag_subcmd = true; + } + + if flag_subcmd { + sc_names = format!("{{{}}}", sc_names); + } + + let usage_name = self + .bin_name + .as_ref() + .map(|bin_name| format!("{}{}{}", bin_name, mid_string, sc_names)) + .unwrap_or(sc_names); + sc.usage_name = Some(usage_name); + + // bin_name should be parent's bin_name + [<reqs>] + the sc's name separated by + // a space + let bin_name = format!( + "{}{}{}", + self.bin_name.as_deref().unwrap_or_default(), + if self.bin_name.is_some() { " " } else { "" }, + &*sc.name + ); + debug!( + "Command::_build_subcommand Setting bin_name of {} to {:?}", + sc.name, bin_name + ); + sc.bin_name = Some(bin_name); + + if sc.display_name.is_none() { + let self_display_name = if is_multicall_set { + self.display_name.as_deref().unwrap_or("") + } else { + self.display_name.as_deref().unwrap_or(&self.name) + }; + let display_name = format!( + "{}{}{}", + self_display_name, + if !self_display_name.is_empty() { + "-" + } else { + "" + }, + &*sc.name + ); + debug!( + "Command::_build_subcommand Setting display_name of {} to {:?}", + sc.name, display_name + ); + sc.display_name = Some(display_name); + } + + // Ensure all args are built and ready to parse + sc._build_self(false); + + Some(sc) + } + + fn _build_bin_names_internal(&mut self) { + debug!("Command::_build_bin_names"); + + if !self.is_set(AppSettings::BinNameBuilt) { + let mut mid_string = String::from(" "); + #[cfg(feature = "usage")] + if !self.is_subcommand_negates_reqs_set() + && !self.is_args_conflicts_with_subcommands_set() + { + let reqs = Usage::new(self).get_required_usage_from(&[], None, true); // maybe Some(m) + + for s in &reqs { + mid_string.push_str(&s.to_string()); + mid_string.push(' '); + } + } + let is_multicall_set = self.is_multicall_set(); + + let self_bin_name = if is_multicall_set { + self.bin_name.as_deref().unwrap_or("") + } else { + self.bin_name.as_deref().unwrap_or(&self.name) + } + .to_owned(); + + for mut sc in &mut self.subcommands { + debug!("Command::_build_bin_names:iter: bin_name set..."); + + if sc.usage_name.is_none() { + use std::fmt::Write; + // Display subcommand name, short and long in usage + let mut sc_names = String::new(); + sc_names.push_str(sc.name.as_str()); + let mut flag_subcmd = false; + if let Some(l) = sc.get_long_flag() { + write!(sc_names, "|--{}", l).unwrap(); + flag_subcmd = true; + } + if let Some(s) = sc.get_short_flag() { + write!(sc_names, "|-{}", s).unwrap(); + flag_subcmd = true; + } + + if flag_subcmd { + sc_names = format!("{{{}}}", sc_names); + } + + let usage_name = format!("{}{}{}", self_bin_name, mid_string, sc_names); + debug!( + "Command::_build_bin_names:iter: Setting usage_name of {} to {:?}", + sc.name, usage_name + ); + sc.usage_name = Some(usage_name); + } else { + debug!( + "Command::_build_bin_names::iter: Using existing usage_name of {} ({:?})", + sc.name, sc.usage_name + ); + } + + if sc.bin_name.is_none() { + let bin_name = format!( + "{}{}{}", + self_bin_name, + if !self_bin_name.is_empty() { " " } else { "" }, + &*sc.name + ); + debug!( + "Command::_build_bin_names:iter: Setting bin_name of {} to {:?}", + sc.name, bin_name + ); + sc.bin_name = Some(bin_name); + } else { + debug!( + "Command::_build_bin_names::iter: Using existing bin_name of {} ({:?})", + sc.name, sc.bin_name + ); + } + + if sc.display_name.is_none() { + let self_display_name = if is_multicall_set { + self.display_name.as_deref().unwrap_or("") + } else { + self.display_name.as_deref().unwrap_or(&self.name) + }; + let display_name = format!( + "{}{}{}", + self_display_name, + if !self_display_name.is_empty() { + "-" + } else { + "" + }, + &*sc.name + ); + debug!( + "Command::_build_bin_names:iter: Setting display_name of {} to {:?}", + sc.name, display_name + ); + sc.display_name = Some(display_name); + } else { + debug!( + "Command::_build_bin_names::iter: Using existing display_name of {} ({:?})", + sc.name, sc.display_name + ); + } + + sc._build_bin_names_internal(); + } + self.set(AppSettings::BinNameBuilt); + } else { + debug!("Command::_build_bin_names: already built"); + } + } + + pub(crate) fn _panic_on_missing_help(&self, help_required_globally: bool) { + if self.is_set(AppSettings::HelpExpected) || help_required_globally { + let args_missing_help: Vec<Id> = self + .args + .args() + .filter(|arg| arg.get_help().is_none() && arg.get_long_help().is_none()) + .map(|arg| arg.get_id().clone()) + .collect(); + + debug_assert!(args_missing_help.is_empty(), + "Command::help_expected is enabled for the Command {}, but at least one of its arguments does not have either `help` or `long_help` set. List of such arguments: {}", + self.name, + args_missing_help.join(", ") + ); + } + + for sub_app in &self.subcommands { + sub_app._panic_on_missing_help(help_required_globally); + } + } + + #[cfg(debug_assertions)] + pub(crate) fn two_args_of<F>(&self, condition: F) -> Option<(&Arg, &Arg)> + where + F: Fn(&Arg) -> bool, + { + two_elements_of(self.args.args().filter(|a: &&Arg| condition(a))) + } + + // just in case + #[allow(unused)] + fn two_groups_of<F>(&self, condition: F) -> Option<(&ArgGroup, &ArgGroup)> + where + F: Fn(&ArgGroup) -> bool, + { + two_elements_of(self.groups.iter().filter(|a| condition(a))) + } + + /// Propagate global args + pub(crate) fn _propagate_global_args(&mut self) { + debug!("Command::_propagate_global_args:{}", self.name); + + let autogenerated_help_subcommand = !self.is_disable_help_subcommand_set(); + + for sc in &mut self.subcommands { + if sc.get_name() == "help" && autogenerated_help_subcommand { + // Avoid propagating args to the autogenerated help subtrees used in completion. + // This prevents args from showing up during help completions like + // `myapp help subcmd <TAB>`, which should only suggest subcommands and not args, + // while still allowing args to show up properly on the generated help message. + continue; + } + + for a in self.args.args().filter(|a| a.is_global_set()) { + if sc.find(&a.id).is_some() { + debug!( + "Command::_propagate skipping {:?} to {}, already exists", + a.id, + sc.get_name(), + ); + continue; + } + + debug!( + "Command::_propagate pushing {:?} to {}", + a.id, + sc.get_name(), + ); + sc.args.push(a.clone()); + } + } + } + + /// Propagate settings + pub(crate) fn _propagate(&mut self) { + debug!("Command::_propagate:{}", self.name); + let mut subcommands = std::mem::take(&mut self.subcommands); + for sc in &mut subcommands { + self._propagate_subcommand(sc); + } + self.subcommands = subcommands; + } + + fn _propagate_subcommand(&self, sc: &mut Self) { + // We have to create a new scope in order to tell rustc the borrow of `sc` is + // done and to recursively call this method + { + if self.settings.is_set(AppSettings::PropagateVersion) { + if let Some(version) = self.version.as_ref() { + sc.version.get_or_insert_with(|| version.clone()); + } + if let Some(long_version) = self.long_version.as_ref() { + sc.long_version.get_or_insert_with(|| long_version.clone()); + } + } + + sc.settings = sc.settings | self.g_settings; + sc.g_settings = sc.g_settings | self.g_settings; + sc.term_w = self.term_w; + sc.max_w = self.max_w; + } + } + + pub(crate) fn _check_help_and_version(&mut self, expand_help_tree: bool) { + debug!( + "Command::_check_help_and_version:{} expand_help_tree={}", + self.name, expand_help_tree + ); + + self.long_help_exists = self.long_help_exists_(); + + if !self.is_disable_help_flag_set() { + debug!("Command::_check_help_and_version: Building default --help"); + let mut arg = Arg::new(Id::HELP) + .short('h') + .long("help") + .action(ArgAction::Help); + if self.long_help_exists { + arg = arg + .help("Print help (see more with '--help')") + .long_help("Print help (see a summary with '-h')"); + } else { + arg = arg.help("Print help"); + } + // Avoiding `arg_internal` to not be sensitive to `next_help_heading` / + // `next_display_order` + self.args.push(arg); + } + if !self.is_disable_version_flag_set() { + debug!("Command::_check_help_and_version: Building default --version"); + let arg = Arg::new(Id::VERSION) + .short('V') + .long("version") + .action(ArgAction::Version) + .help("Print version"); + // Avoiding `arg_internal` to not be sensitive to `next_help_heading` / + // `next_display_order` + self.args.push(arg); + } + + if !self.is_set(AppSettings::DisableHelpSubcommand) { + debug!("Command::_check_help_and_version: Building help subcommand"); + let help_about = "Print this message or the help of the given subcommand(s)"; + + let mut help_subcmd = if expand_help_tree { + // Slow code path to recursively clone all other subcommand subtrees under help + let help_subcmd = Command::new("help") + .about(help_about) + .global_setting(AppSettings::DisableHelpSubcommand) + .subcommands(self.get_subcommands().map(Command::_copy_subtree_for_help)); + + let mut help_help_subcmd = Command::new("help").about(help_about); + help_help_subcmd.version = None; + help_help_subcmd.long_version = None; + help_help_subcmd = help_help_subcmd + .setting(AppSettings::DisableHelpFlag) + .setting(AppSettings::DisableVersionFlag); + + help_subcmd.subcommand(help_help_subcmd) + } else { + Command::new("help").about(help_about).arg( + Arg::new("subcommand") + .action(ArgAction::Append) + .num_args(..) + .value_name("COMMAND") + .help("Print help for the subcommand(s)"), + ) + }; + self._propagate_subcommand(&mut help_subcmd); + + // The parser acts like this is set, so let's set it so we don't falsely + // advertise it to the user + help_subcmd.version = None; + help_subcmd.long_version = None; + help_subcmd = help_subcmd + .setting(AppSettings::DisableHelpFlag) + .setting(AppSettings::DisableVersionFlag) + .unset_global_setting(AppSettings::PropagateVersion); + + self.subcommands.push(help_subcmd); + } + } + + fn _copy_subtree_for_help(&self) -> Command { + let mut cmd = Command::new(self.name.clone()) + .hide(self.is_hide_set()) + .global_setting(AppSettings::DisableHelpFlag) + .global_setting(AppSettings::DisableVersionFlag) + .subcommands(self.get_subcommands().map(Command::_copy_subtree_for_help)); + if self.get_about().is_some() { + cmd = cmd.about(self.get_about().unwrap().clone()); + } + cmd + } + + pub(crate) fn _render_version(&self, use_long: bool) -> String { + debug!("Command::_render_version"); + + let ver = if use_long { + self.long_version + .as_deref() + .or(self.version.as_deref()) + .unwrap_or_default() + } else { + self.version + .as_deref() + .or(self.long_version.as_deref()) + .unwrap_or_default() + }; + let display_name = self.get_display_name().unwrap_or_else(|| self.get_name()); + format!("{} {}\n", display_name, ver) + } + + pub(crate) fn format_group(&self, g: &Id) -> StyledStr { + let g_string = self + .unroll_args_in_group(g) + .iter() + .filter_map(|x| self.find(x)) + .map(|x| { + if x.is_positional() { + // Print val_name for positional arguments. e.g. <file_name> + x.name_no_brackets() + } else { + // Print usage string for flags arguments, e.g. <--help> + x.to_string() + } + }) + .collect::<Vec<_>>() + .join("|"); + let mut styled = StyledStr::new(); + styled.none("<"); + styled.none(g_string); + styled.none(">"); + styled + } +} + +/// A workaround: +/// <https://github.com/rust-lang/rust/issues/34511#issuecomment-373423999> +pub(crate) trait Captures<'a> {} +impl<'a, T> Captures<'a> for T {} + +// Internal Query Methods +impl Command { + /// Iterate through the *flags* & *options* arguments. + #[cfg(any(feature = "usage", feature = "help"))] + pub(crate) fn get_non_positionals(&self) -> impl Iterator<Item = &Arg> { + self.get_arguments().filter(|a| !a.is_positional()) + } + + pub(crate) fn find(&self, arg_id: &Id) -> Option<&Arg> { + self.args.args().find(|a| a.get_id() == arg_id) + } + + #[inline] + pub(crate) fn contains_short(&self, s: char) -> bool { + debug_assert!( + self.is_set(AppSettings::Built), + "If Command::_build hasn't been called, manually search through Arg shorts" + ); + + self.args.contains(s) + } + + #[inline] + pub(crate) fn set(&mut self, s: AppSettings) { + self.settings.set(s) + } + + #[inline] + pub(crate) fn has_positionals(&self) -> bool { + self.get_positionals().next().is_some() + } + + #[cfg(any(feature = "usage", feature = "help"))] + pub(crate) fn has_visible_subcommands(&self) -> bool { + self.subcommands + .iter() + .any(|sc| sc.name != "help" && !sc.is_set(AppSettings::Hidden)) + } + + /// Check if this subcommand can be referred to as `name`. In other words, + /// check if `name` is the name of this subcommand or is one of its aliases. + #[inline] + pub(crate) fn aliases_to(&self, name: impl AsRef<std::ffi::OsStr>) -> bool { + let name = name.as_ref(); + self.get_name() == name || self.get_all_aliases().any(|alias| alias == name) + } + + /// Check if this subcommand can be referred to as `name`. In other words, + /// check if `name` is the name of this short flag subcommand or is one of its short flag aliases. + #[inline] + pub(crate) fn short_flag_aliases_to(&self, flag: char) -> bool { + Some(flag) == self.short_flag + || self.get_all_short_flag_aliases().any(|alias| flag == alias) + } + + /// Check if this subcommand can be referred to as `name`. In other words, + /// check if `name` is the name of this long flag subcommand or is one of its long flag aliases. + #[inline] + pub(crate) fn long_flag_aliases_to(&self, flag: &str) -> bool { + match self.long_flag.as_ref() { + Some(long_flag) => { + long_flag == flag || self.get_all_long_flag_aliases().any(|alias| alias == flag) + } + None => self.get_all_long_flag_aliases().any(|alias| alias == flag), + } + } + + #[cfg(debug_assertions)] + pub(crate) fn id_exists(&self, id: &Id) -> bool { + self.args.args().any(|x| x.get_id() == id) || self.groups.iter().any(|x| x.id == *id) + } + + /// Iterate through the groups this arg is member of. + pub(crate) fn groups_for_arg<'a>(&'a self, arg: &Id) -> impl Iterator<Item = Id> + 'a { + debug!("Command::groups_for_arg: id={:?}", arg); + let arg = arg.clone(); + self.groups + .iter() + .filter(move |grp| grp.args.iter().any(|a| a == &arg)) + .map(|grp| grp.id.clone()) + } + + pub(crate) fn find_group(&self, group_id: &Id) -> Option<&ArgGroup> { + self.groups.iter().find(|g| g.id == *group_id) + } + + /// Iterate through all the names of all subcommands (not recursively), including aliases. + /// Used for suggestions. + pub(crate) fn all_subcommand_names(&self) -> impl Iterator<Item = &str> + Captures { + self.get_subcommands().flat_map(|sc| { + let name = sc.get_name(); + let aliases = sc.get_all_aliases(); + std::iter::once(name).chain(aliases) + }) + } + + pub(crate) fn required_graph(&self) -> ChildGraph<Id> { + let mut reqs = ChildGraph::with_capacity(5); + for a in self.args.args().filter(|a| a.is_required_set()) { + reqs.insert(a.get_id().clone()); + } + for group in &self.groups { + if group.required { + let idx = reqs.insert(group.id.clone()); + for a in &group.requires { + reqs.insert_child(idx, a.clone()); + } + } + } + + reqs + } + + pub(crate) fn unroll_args_in_group(&self, group: &Id) -> Vec<Id> { + debug!("Command::unroll_args_in_group: group={:?}", group); + let mut g_vec = vec![group]; + let mut args = vec![]; + + while let Some(g) = g_vec.pop() { + for n in self + .groups + .iter() + .find(|grp| grp.id == *g) + .expect(INTERNAL_ERROR_MSG) + .args + .iter() + { + debug!("Command::unroll_args_in_group:iter: entity={:?}", n); + if !args.contains(n) { + if self.find(n).is_some() { + debug!("Command::unroll_args_in_group:iter: this is an arg"); + args.push(n.clone()) + } else { + debug!("Command::unroll_args_in_group:iter: this is a group"); + g_vec.push(n); + } + } + } + } + + args + } + + pub(crate) fn unroll_arg_requires<F>(&self, func: F, arg: &Id) -> Vec<Id> + where + F: Fn(&(ArgPredicate, Id)) -> Option<Id>, + { + let mut processed = vec![]; + let mut r_vec = vec![arg]; + let mut args = vec![]; + + while let Some(a) = r_vec.pop() { + if processed.contains(&a) { + continue; + } + + processed.push(a); + + if let Some(arg) = self.find(a) { + for r in arg.requires.iter().filter_map(&func) { + if let Some(req) = self.find(&r) { + if !req.requires.is_empty() { + r_vec.push(req.get_id()) + } + } + args.push(r); + } + } + } + + args + } + + /// Find a flag subcommand name by short flag or an alias + pub(crate) fn find_short_subcmd(&self, c: char) -> Option<&str> { + self.get_subcommands() + .find(|sc| sc.short_flag_aliases_to(c)) + .map(|sc| sc.get_name()) + } + + /// Find a flag subcommand name by long flag or an alias + pub(crate) fn find_long_subcmd(&self, long: &str) -> Option<&str> { + self.get_subcommands() + .find(|sc| sc.long_flag_aliases_to(long)) + .map(|sc| sc.get_name()) + } + + #[cfg(feature = "help")] + pub(crate) fn get_display_order(&self) -> usize { + self.disp_ord.unwrap_or(999) + } + + pub(crate) fn write_help_err(&self, mut use_long: bool) -> StyledStr { + debug!( + "Command::write_help_err: {}, use_long={:?}", + self.get_display_name().unwrap_or_else(|| self.get_name()), + use_long && self.long_help_exists(), + ); + + use_long = use_long && self.long_help_exists(); + let usage = Usage::new(self); + + let mut styled = StyledStr::new(); + write_help(&mut styled, self, &usage, use_long); + + styled + } + + pub(crate) fn write_version_err(&self, use_long: bool) -> StyledStr { + let msg = self._render_version(use_long); + let mut styled = StyledStr::new(); + styled.none(msg); + styled + } + + pub(crate) fn long_help_exists(&self) -> bool { + debug!("Command::long_help_exists: {}", self.long_help_exists); + self.long_help_exists + } + + fn long_help_exists_(&self) -> bool { + debug!("Command::long_help_exists"); + // In this case, both must be checked. This allows the retention of + // original formatting, but also ensures that the actual -h or --help + // specified by the user is sent through. If hide_short_help is not included, + // then items specified with hidden_short_help will also be hidden. + let should_long = |v: &Arg| { + v.get_long_help().is_some() + || v.is_hide_long_help_set() + || v.is_hide_short_help_set() + || v.get_possible_values() + .iter() + .any(PossibleValue::should_show_help) + }; + + // Subcommands aren't checked because we prefer short help for them, deferring to + // `cmd subcmd --help` for more. + self.get_long_about().is_some() + || self.get_before_long_help().is_some() + || self.get_after_long_help().is_some() + || self.get_arguments().any(should_long) + } + + // Should we color the help? + pub(crate) fn color_help(&self) -> ColorChoice { + #[cfg(feature = "color")] + if self.is_disable_colored_help_set() { + return ColorChoice::Never; + } + + self.get_color() + } +} + +impl Default for Command { + fn default() -> Self { + Self { + name: Default::default(), + long_flag: Default::default(), + short_flag: Default::default(), + display_name: Default::default(), + bin_name: Default::default(), + author: Default::default(), + version: Default::default(), + long_version: Default::default(), + about: Default::default(), + long_about: Default::default(), + before_help: Default::default(), + before_long_help: Default::default(), + after_help: Default::default(), + after_long_help: Default::default(), + aliases: Default::default(), + short_flag_aliases: Default::default(), + long_flag_aliases: Default::default(), + usage_str: Default::default(), + usage_name: Default::default(), + help_str: Default::default(), + disp_ord: Default::default(), + term_w: Default::default(), + max_w: Default::default(), + #[cfg(feature = "help")] + template: Default::default(), + settings: Default::default(), + g_settings: Default::default(), + args: Default::default(), + subcommands: Default::default(), + replacers: Default::default(), + groups: Default::default(), + current_help_heading: Default::default(), + current_disp_ord: Some(0), + subcommand_value_name: Default::default(), + subcommand_heading: Default::default(), + external_value_parser: Default::default(), + long_help_exists: false, + } + } +} + +impl Index<&'_ Id> for Command { + type Output = Arg; + + fn index(&self, key: &Id) -> &Self::Output { + self.find(key).expect(INTERNAL_ERROR_MSG) + } +} + +impl From<&'_ Command> for Command { + fn from(cmd: &'_ Command) -> Self { + cmd.clone() + } +} + +impl fmt::Display for Command { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "{}", self.name) + } +} + +fn two_elements_of<I, T>(mut iter: I) -> Option<(T, T)> +where + I: Iterator<Item = T>, +{ + let first = iter.next(); + let second = iter.next(); + + match (first, second) { + (Some(first), Some(second)) => Some((first, second)), + _ => None, + } +} + +#[test] +fn check_auto_traits() { + static_assertions::assert_impl_all!(Command: Send, Sync, Unpin); +} diff --git a/vendor/clap/src/builder/debug_asserts.rs b/vendor/clap/src/builder/debug_asserts.rs new file mode 100644 index 000000000..bfebbb4c4 --- /dev/null +++ b/vendor/clap/src/builder/debug_asserts.rs @@ -0,0 +1,887 @@ +use std::cmp::Ordering; + +use clap_lex::RawOsStr; + +use crate::builder::OsStr; +use crate::builder::ValueRange; +use crate::mkeymap::KeyType; +use crate::util::FlatSet; +use crate::util::Id; +use crate::ArgAction; +use crate::INTERNAL_ERROR_MSG; +use crate::{Arg, Command, ValueHint}; + +pub(crate) fn assert_app(cmd: &Command) { + debug!("Command::_debug_asserts"); + + let mut short_flags = vec![]; + let mut long_flags = vec![]; + + // Invalid version flag settings + if cmd.get_version().is_none() && cmd.get_long_version().is_none() { + // PropagateVersion is meaningless if there is no version + assert!( + !cmd.is_propagate_version_set(), + "Command {}: No version information via Command::version or Command::long_version to propagate", + cmd.get_name(), + ); + + // Used `Command::mut_arg("version", ..) but did not provide any version information to display + let version_needed = cmd + .get_arguments() + .filter(|x| matches!(x.get_action(), ArgAction::Version)) + .map(|x| x.get_id()) + .collect::<Vec<_>>(); + + assert_eq!(version_needed, Vec::<&str>::new(), "Command {}: `ArgAction::Version` used without providing Command::version or Command::long_version" + ,cmd.get_name() + ); + } + + for sc in cmd.get_subcommands() { + if let Some(s) = sc.get_short_flag().as_ref() { + short_flags.push(Flag::Command(format!("-{}", s), sc.get_name())); + } + + for short_alias in sc.get_all_short_flag_aliases() { + short_flags.push(Flag::Command(format!("-{}", short_alias), sc.get_name())); + } + + if let Some(l) = sc.get_long_flag().as_ref() { + assert!(!l.starts_with('-'), "Command {}: long_flag {:?} must not start with a `-`, that will be handled by the parser", sc.get_name(), l); + long_flags.push(Flag::Command(format!("--{}", l), sc.get_name())); + } + + for long_alias in sc.get_all_long_flag_aliases() { + long_flags.push(Flag::Command(format!("--{}", long_alias), sc.get_name())); + } + } + + for arg in cmd.get_arguments() { + assert_arg(arg); + + assert!( + !cmd.is_multicall_set(), + "Command {}: Arguments like {} cannot be set on a multicall command", + cmd.get_name(), + arg.get_id() + ); + + if let Some(s) = arg.get_short() { + short_flags.push(Flag::Arg(format!("-{}", s), arg.get_id().as_str())); + } + + for (short_alias, _) in &arg.short_aliases { + short_flags.push(Flag::Arg( + format!("-{}", short_alias), + arg.get_id().as_str(), + )); + } + + if let Some(l) = arg.get_long() { + assert!(!l.starts_with('-'), "Argument {}: long {:?} must not start with a `-`, that will be handled by the parser", arg.get_id(), l); + long_flags.push(Flag::Arg(format!("--{}", l), arg.get_id().as_str())); + } + + for (long_alias, _) in &arg.aliases { + long_flags.push(Flag::Arg( + format!("--{}", long_alias), + arg.get_id().as_str(), + )); + } + + // Name conflicts + if let Some((first, second)) = cmd.two_args_of(|x| x.get_id() == arg.get_id()) { + panic!( + "Command {}: Argument names must be unique, but '{}' is in use by more than one argument or group{}", + cmd.get_name(), + arg.get_id(), + duplicate_tip(cmd, first, second), + ); + } + + // Long conflicts + if let Some(l) = arg.get_long() { + if let Some((first, second)) = cmd.two_args_of(|x| x.get_long() == Some(l)) { + panic!( + "Command {}: Long option names must be unique for each argument, \ + but '--{}' is in use by both '{}' and '{}'{}", + cmd.get_name(), + l, + first.get_id(), + second.get_id(), + duplicate_tip(cmd, first, second) + ) + } + } + + // Short conflicts + if let Some(s) = arg.get_short() { + if let Some((first, second)) = cmd.two_args_of(|x| x.get_short() == Some(s)) { + panic!( + "Command {}: Short option names must be unique for each argument, \ + but '-{}' is in use by both '{}' and '{}'{}", + cmd.get_name(), + s, + first.get_id(), + second.get_id(), + duplicate_tip(cmd, first, second), + ) + } + } + + // Index conflicts + if let Some(idx) = arg.index { + if let Some((first, second)) = + cmd.two_args_of(|x| x.is_positional() && x.get_index() == Some(idx)) + { + panic!( + "Command {}: Argument '{}' has the same index as '{}' \ + and they are both positional arguments\n\n\t \ + Use `Arg::num_args(1..)` to allow one \ + positional argument to take multiple values", + cmd.get_name(), + first.get_id(), + second.get_id() + ) + } + } + + // requires, r_if, r_unless + for req in &arg.requires { + assert!( + cmd.id_exists(&req.1), + "Command {}: Argument or group '{}' specified in 'requires*' for '{}' does not exist", + cmd.get_name(), + req.1, + arg.get_id(), + ); + } + + for req in &arg.r_ifs { + assert!( + !arg.is_required_set(), + "Argument {}: `required` conflicts with `required_if_eq*`", + arg.get_id() + ); + assert!( + cmd.id_exists(&req.0), + "Command {}: Argument or group '{}' specified in 'required_if_eq*' for '{}' does not exist", + cmd.get_name(), + req.0, + arg.get_id() + ); + } + + for req in &arg.r_ifs_all { + assert!( + !arg.is_required_set(), + "Argument {}: `required` conflicts with `required_if_eq_all`", + arg.get_id() + ); + assert!( + cmd.id_exists(&req.0), + "Command {}: Argument or group '{}' specified in 'required_if_eq_all' for '{}' does not exist", + cmd.get_name(), + req.0, + arg.get_id() + ); + } + + for req in &arg.r_unless { + assert!( + !arg.is_required_set(), + "Argument {}: `required` conflicts with `required_unless*`", + arg.get_id() + ); + assert!( + cmd.id_exists(req), + "Command {}: Argument or group '{}' specified in 'required_unless*' for '{}' does not exist", + cmd.get_name(), + req, + arg.get_id(), + ); + } + + for req in &arg.r_unless_all { + assert!( + !arg.is_required_set(), + "Argument {}: `required` conflicts with `required_unless*`", + arg.get_id() + ); + assert!( + cmd.id_exists(req), + "Command {}: Argument or group '{}' specified in 'required_unless*' for '{}' does not exist", + cmd.get_name(), + req, + arg.get_id(), + ); + } + + // blacklist + for req in &arg.blacklist { + assert!( + cmd.id_exists(req), + "Command {}: Argument or group '{}' specified in 'conflicts_with*' for '{}' does not exist", + cmd.get_name(), + req, + arg.get_id(), + ); + } + + // overrides + for req in &arg.overrides { + assert!( + cmd.id_exists(req), + "Command {}: Argument or group '{}' specified in 'overrides_with*' for '{}' does not exist", + cmd.get_name(), + req, + arg.get_id(), + ); + } + + if arg.is_last_set() { + assert!( + arg.get_long().is_none(), + "Command {}: Flags or Options cannot have last(true) set. '{}' has both a long and last(true) set.", + cmd.get_name(), + arg.get_id() + ); + assert!( + arg.get_short().is_none(), + "Command {}: Flags or Options cannot have last(true) set. '{}' has both a short and last(true) set.", + cmd.get_name(), + arg.get_id() + ); + } + + assert!( + !(arg.is_required_set() && arg.is_global_set()), + "Command {}: Global arguments cannot be required.\n\n\t'{}' is marked as both global and required", + cmd.get_name(), + arg.get_id() + ); + + if arg.get_value_hint() == ValueHint::CommandWithArguments { + assert!( + arg.is_positional(), + "Command {}: Argument '{}' has hint CommandWithArguments and must be positional.", + cmd.get_name(), + arg.get_id() + ); + + assert!( + arg.is_trailing_var_arg_set() || arg.is_last_set(), + "Command {}: Positional argument '{}' has hint CommandWithArguments, so Command must have `trailing_var_arg(true)` or `last(true)` set.", + cmd.get_name(), + arg.get_id() + ); + } + } + + for group in cmd.get_groups() { + let derive_hint = if cfg!(feature = "derive") { + " (note: `Args` implicitly creates `ArgGroup`s; disable with `#[group(skip)]`" + } else { + "" + }; + + // Name conflicts + assert!( + cmd.get_groups().filter(|x| x.id == group.id).count() < 2, + "Command {}: Argument group name must be unique\n\n\t'{}' is already in use{}", + cmd.get_name(), + group.get_id(), + derive_hint + ); + + // Groups should not have naming conflicts with Args + assert!( + !cmd.get_arguments().any(|x| x.get_id() == group.get_id()), + "Command {}: Argument group name '{}' must not conflict with argument name{}", + cmd.get_name(), + group.get_id(), + derive_hint + ); + + for arg in &group.args { + // Args listed inside groups should exist + assert!( + cmd.get_arguments().any(|x| x.get_id() == arg), + "Command {}: Argument group '{}' contains non-existent argument '{}'", + cmd.get_name(), + group.get_id(), + arg + ); + } + } + + // Conflicts between flags and subcommands + + long_flags.sort_unstable(); + short_flags.sort_unstable(); + + detect_duplicate_flags(&long_flags, "long"); + detect_duplicate_flags(&short_flags, "short"); + + let mut subs = FlatSet::new(); + for sc in cmd.get_subcommands() { + assert!( + subs.insert(sc.get_name()), + "Command {}: command name `{}` is duplicated", + cmd.get_name(), + sc.get_name() + ); + for alias in sc.get_all_aliases() { + assert!( + subs.insert(alias), + "Command {}: command `{}` alias `{}` is duplicated", + cmd.get_name(), + sc.get_name(), + alias + ); + } + } + + _verify_positionals(cmd); + + #[cfg(feature = "help")] + if let Some(help_template) = cmd.get_help_template() { + assert!( + !help_template.to_string().contains("{flags}"), + "Command {}: {}", + cmd.get_name(), + "`{flags}` template variable was removed in clap3, they are now included in `{options}`", + ); + assert!( + !help_template.to_string().contains("{unified}"), + "Command {}: {}", + cmd.get_name(), + "`{unified}` template variable was removed in clap3, use `{options}` instead" + ); + #[cfg(feature = "unstable-v5")] + assert!( + !help_template.to_string().contains("{bin}"), + "Command {}: {}", + cmd.get_name(), + "`{bin}` template variable was removed in clap5, use `{name}` instead" + ) + } + + cmd._panic_on_missing_help(cmd.is_help_expected_set()); + assert_app_flags(cmd); +} + +fn duplicate_tip(cmd: &Command, first: &Arg, second: &Arg) -> &'static str { + if !cmd.is_disable_help_flag_set() + && (first.get_id() == Id::HELP || second.get_id() == Id::HELP) + { + " (call `cmd.disable_help_flag(true)` to remove the auto-generated `--help`)" + } else if !cmd.is_disable_version_flag_set() + && (first.get_id() == Id::VERSION || second.get_id() == Id::VERSION) + { + " (call `cmd.disable_version_flag(true)` to remove the auto-generated `--version`)" + } else { + "" + } +} + +#[derive(Eq)] +enum Flag<'a> { + Command(String, &'a str), + Arg(String, &'a str), +} + +impl PartialEq for Flag<'_> { + fn eq(&self, other: &Flag) -> bool { + self.cmp(other) == Ordering::Equal + } +} + +impl PartialOrd for Flag<'_> { + fn partial_cmp(&self, other: &Flag) -> Option<Ordering> { + use Flag::*; + + match (self, other) { + (Command(s1, _), Command(s2, _)) + | (Arg(s1, _), Arg(s2, _)) + | (Command(s1, _), Arg(s2, _)) + | (Arg(s1, _), Command(s2, _)) => { + if s1 == s2 { + Some(Ordering::Equal) + } else { + s1.partial_cmp(s2) + } + } + } + } +} + +impl Ord for Flag<'_> { + fn cmp(&self, other: &Self) -> Ordering { + self.partial_cmp(other).unwrap() + } +} + +fn detect_duplicate_flags(flags: &[Flag], short_or_long: &str) { + use Flag::*; + + for (one, two) in find_duplicates(flags) { + match (one, two) { + (Command(flag, one), Command(_, another)) if one != another => panic!( + "the '{}' {} flag is specified for both '{}' and '{}' subcommands", + flag, short_or_long, one, another + ), + + (Arg(flag, one), Arg(_, another)) if one != another => panic!( + "{} option names must be unique, but '{}' is in use by both '{}' and '{}'", + short_or_long, flag, one, another + ), + + (Arg(flag, arg), Command(_, sub)) | (Command(flag, sub), Arg(_, arg)) => panic!( + "the '{}' {} flag for the '{}' argument conflicts with the short flag \ + for '{}' subcommand", + flag, short_or_long, arg, sub + ), + + _ => {} + } + } +} + +/// Find duplicates in a sorted array. +/// +/// The algorithm is simple: the array is sorted, duplicates +/// must be placed next to each other, we can check only adjacent elements. +fn find_duplicates<T: PartialEq>(slice: &[T]) -> impl Iterator<Item = (&T, &T)> { + slice.windows(2).filter_map(|w| { + if w[0] == w[1] { + Some((&w[0], &w[1])) + } else { + None + } + }) +} + +fn assert_app_flags(cmd: &Command) { + macro_rules! checker { + ($a:ident requires $($b:ident)|+) => { + if cmd.$a() { + let mut s = String::new(); + + $( + if !cmd.$b() { + use std::fmt::Write; + write!(&mut s, " AppSettings::{} is required when AppSettings::{} is set.\n", std::stringify!($b), std::stringify!($a)).unwrap(); + } + )+ + + if !s.is_empty() { + panic!("{}", s) + } + } + }; + ($a:ident conflicts $($b:ident)|+) => { + if cmd.$a() { + let mut s = String::new(); + + $( + if cmd.$b() { + use std::fmt::Write; + write!(&mut s, " AppSettings::{} conflicts with AppSettings::{}.\n", std::stringify!($b), std::stringify!($a)).unwrap(); + } + )+ + + if !s.is_empty() { + panic!("{}\n{}", cmd.get_name(), s) + } + } + }; + } + + checker!(is_multicall_set conflicts is_no_binary_name_set); +} + +#[cfg(debug_assertions)] +fn _verify_positionals(cmd: &Command) -> bool { + debug!("Command::_verify_positionals"); + // Because you must wait until all arguments have been supplied, this is the first chance + // to make assertions on positional argument indexes + // + // First we verify that the index highest supplied index, is equal to the number of + // positional arguments to verify there are no gaps (i.e. supplying an index of 1 and 3 + // but no 2) + + let highest_idx = cmd + .get_keymap() + .keys() + .filter_map(|x| { + if let KeyType::Position(n) = x { + Some(*n) + } else { + None + } + }) + .max() + .unwrap_or(0); + + let num_p = cmd.get_keymap().keys().filter(|x| x.is_position()).count(); + + assert!( + highest_idx == num_p, + "Found positional argument whose index is {} but there \ + are only {} positional arguments defined", + highest_idx, + num_p + ); + + for arg in cmd.get_arguments() { + if arg.index.unwrap_or(0) == highest_idx { + assert!( + !arg.is_trailing_var_arg_set() || !arg.is_last_set(), + "{}:{}: `Arg::trailing_var_arg` and `Arg::last` cannot be used together", + cmd.get_name(), + arg.get_id() + ); + + if arg.is_trailing_var_arg_set() { + assert!( + arg.is_multiple(), + "{}:{}: `Arg::trailing_var_arg` must accept multiple values", + cmd.get_name(), + arg.get_id() + ); + } + } else { + assert!( + !arg.is_trailing_var_arg_set(), + "{}:{}: `Arg::trailing_var_arg` can only apply to last positional", + cmd.get_name(), + arg.get_id() + ); + } + } + + // Next we verify that only the highest index has takes multiple arguments (if any) + let only_highest = |a: &Arg| a.is_multiple() && (a.get_index().unwrap_or(0) != highest_idx); + if cmd.get_positionals().any(only_highest) { + // First we make sure if there is a positional that allows multiple values + // the one before it (second to last) has one of these: + // * a value terminator + // * ArgSettings::Last + // * The last arg is Required + + // We can't pass the closure (it.next()) to the macro directly because each call to + // find() (iterator, not macro) gets called repeatedly. + let last = &cmd.get_keymap()[&KeyType::Position(highest_idx)]; + let second_to_last = &cmd.get_keymap()[&KeyType::Position(highest_idx - 1)]; + + // Either the final positional is required + // Or the second to last has a terminator or .last(true) set + let ok = last.is_required_set() + || (second_to_last.terminator.is_some() || second_to_last.is_last_set()) + || last.is_last_set(); + assert!( + ok, + "When using a positional argument with `.num_args(1..)` that is *not the \ + last* positional argument, the last positional argument (i.e. the one \ + with the highest index) *must* have .required(true) or .last(true) set." + ); + + // We make sure if the second to last is Multiple the last is ArgSettings::Last + let ok = second_to_last.is_multiple() || last.is_last_set(); + assert!( + ok, + "Only the last positional argument, or second to last positional \ + argument may be set to `.num_args(1..)`" + ); + + // Next we check how many have both Multiple and not a specific number of values set + let count = cmd + .get_positionals() + .filter(|p| { + p.is_multiple_values_set() + && !p.get_num_args().expect(INTERNAL_ERROR_MSG).is_fixed() + }) + .count(); + let ok = count <= 1 + || (last.is_last_set() + && last.is_multiple() + && second_to_last.is_multiple() + && count == 2); + assert!( + ok, + "Only one positional argument with `.num_args(1..)` set is allowed per \ + command, unless the second one also has .last(true) set" + ); + } + + let mut found = false; + + if cmd.is_allow_missing_positional_set() { + // Check that if a required positional argument is found, all positions with a lower + // index are also required. + let mut foundx2 = false; + + for p in cmd.get_positionals() { + if foundx2 && !p.is_required_set() { + assert!( + p.is_required_set(), + "Found non-required positional argument with a lower \ + index than a required positional argument by two or more: {:?} \ + index {:?}", + p.get_id(), + p.get_index() + ); + } else if p.is_required_set() && !p.is_last_set() { + // Args that .last(true) don't count since they can be required and have + // positionals with a lower index that aren't required + // Imagine: prog <req1> [opt1] -- <req2> + // Both of these are valid invocations: + // $ prog r1 -- r2 + // $ prog r1 o1 -- r2 + if found { + foundx2 = true; + continue; + } + found = true; + continue; + } else { + found = false; + } + } + } else { + // Check that if a required positional argument is found, all positions with a lower + // index are also required + for p in (1..=num_p).rev().filter_map(|n| cmd.get_keymap().get(&n)) { + if found { + assert!( + p.is_required_set(), + "Found non-required positional argument with a lower \ + index than a required positional argument: {:?} index {:?}", + p.get_id(), + p.get_index() + ); + } else if p.is_required_set() && !p.is_last_set() { + // Args that .last(true) don't count since they can be required and have + // positionals with a lower index that aren't required + // Imagine: prog <req1> [opt1] -- <req2> + // Both of these are valid invocations: + // $ prog r1 -- r2 + // $ prog r1 o1 -- r2 + found = true; + continue; + } + } + } + assert!( + cmd.get_positionals().filter(|p| p.is_last_set()).count() < 2, + "Only one positional argument may have last(true) set. Found two." + ); + if cmd + .get_positionals() + .any(|p| p.is_last_set() && p.is_required_set()) + && cmd.has_subcommands() + && !cmd.is_subcommand_negates_reqs_set() + { + panic!( + "Having a required positional argument with .last(true) set *and* child \ + subcommands without setting SubcommandsNegateReqs isn't compatible." + ); + } + + true +} + +fn assert_arg(arg: &Arg) { + debug!("Arg::_debug_asserts:{}", arg.get_id()); + + // Self conflict + // TODO: this check should be recursive + assert!( + !arg.blacklist.iter().any(|x| x == arg.get_id()), + "Argument '{}' cannot conflict with itself", + arg.get_id(), + ); + + assert_eq!( + arg.get_action().takes_values(), + arg.is_takes_value_set(), + "Argument `{}`'s selected action {:?} contradicts `takes_value`", + arg.get_id(), + arg.get_action() + ); + if let Some(action_type_id) = arg.get_action().value_type_id() { + assert_eq!( + action_type_id, + arg.get_value_parser().type_id(), + "Argument `{}`'s selected action {:?} contradicts `value_parser` ({:?})", + arg.get_id(), + arg.get_action(), + arg.get_value_parser() + ); + } + + if arg.get_value_hint() != ValueHint::Unknown { + assert!( + arg.is_takes_value_set(), + "Argument '{}' has value hint but takes no value", + arg.get_id() + ); + + if arg.get_value_hint() == ValueHint::CommandWithArguments { + assert!( + arg.is_multiple_values_set(), + "Argument '{}' uses hint CommandWithArguments and must accept multiple values", + arg.get_id() + ) + } + } + + if arg.index.is_some() { + assert!( + arg.is_positional(), + "Argument '{}' is a positional argument and can't have short or long name versions", + arg.get_id() + ); + assert!( + arg.is_takes_value_set(), + "Argument '{}` is positional, it must take a value{}", + arg.get_id(), + if arg.get_id() == Id::HELP { + " (`mut_arg` no longer works with implicit `--help`)" + } else if arg.get_id() == Id::VERSION { + " (`mut_arg` no longer works with implicit `--version`)" + } else { + "" + } + ); + } + + let num_vals = arg.get_num_args().expect(INTERNAL_ERROR_MSG); + // This can be the cause of later asserts, so put this first + if num_vals != ValueRange::EMPTY { + // HACK: Don't check for flags to make the derive easier + let num_val_names = arg.get_value_names().unwrap_or(&[]).len(); + if num_vals.max_values() < num_val_names { + panic!( + "Argument {}: Too many value names ({}) compared to `num_args` ({})", + arg.get_id(), + num_val_names, + num_vals + ); + } + } + + assert_eq!( + num_vals.takes_values(), + arg.is_takes_value_set(), + "Argument {}: mismatch between `num_args` ({}) and `takes_value`", + arg.get_id(), + num_vals, + ); + assert_eq!( + num_vals.is_multiple(), + arg.is_multiple_values_set(), + "Argument {}: mismatch between `num_args` ({}) and `multiple_values`", + arg.get_id(), + num_vals, + ); + + if 1 < num_vals.min_values() { + assert!( + !arg.is_require_equals_set(), + "Argument {}: cannot accept more than 1 arg (num_args={}) with require_equals", + arg.get_id(), + num_vals + ); + } + + if num_vals == ValueRange::SINGLE { + assert!( + !arg.is_multiple_values_set(), + "Argument {}: mismatch between `num_args` and `multiple_values`", + arg.get_id() + ); + } + + assert_arg_flags(arg); + + assert_defaults(arg, "default_value", arg.default_vals.iter()); + assert_defaults( + arg, + "default_missing_value", + arg.default_missing_vals.iter(), + ); + assert_defaults( + arg, + "default_value_if", + arg.default_vals_ifs + .iter() + .filter_map(|(_, _, default)| default.as_ref()), + ); +} + +fn assert_arg_flags(arg: &Arg) { + macro_rules! checker { + ($a:ident requires $($b:ident)|+) => { + if arg.$a() { + let mut s = String::new(); + + $( + if !arg.$b() { + use std::fmt::Write; + write!(&mut s, " Arg::{} is required when Arg::{} is set.\n", std::stringify!($b), std::stringify!($a)).unwrap(); + } + )+ + + if !s.is_empty() { + panic!("Argument {:?}\n{}", arg.get_id(), s) + } + } + } + } + + checker!(is_hide_possible_values_set requires is_takes_value_set); + checker!(is_allow_hyphen_values_set requires is_takes_value_set); + checker!(is_allow_negative_numbers_set requires is_takes_value_set); + checker!(is_require_equals_set requires is_takes_value_set); + checker!(is_last_set requires is_takes_value_set); + checker!(is_hide_default_value_set requires is_takes_value_set); + checker!(is_multiple_values_set requires is_takes_value_set); + checker!(is_ignore_case_set requires is_takes_value_set); +} + +fn assert_defaults<'d>( + arg: &Arg, + field: &'static str, + defaults: impl IntoIterator<Item = &'d OsStr>, +) { + for default_os in defaults { + let value_parser = arg.get_value_parser(); + let assert_cmd = Command::new("assert"); + if let Some(delim) = arg.get_value_delimiter() { + let default_os = RawOsStr::new(default_os); + for part in default_os.split(delim) { + if let Err(err) = value_parser.parse_ref(&assert_cmd, Some(arg), &part.to_os_str()) + { + panic!( + "Argument `{}`'s {}={:?} failed validation: {}", + arg.get_id(), + field, + part.to_str_lossy(), + err + ); + } + } + } else if let Err(err) = value_parser.parse_ref(&assert_cmd, Some(arg), default_os) { + panic!( + "Argument `{}`'s {}={:?} failed validation: {}", + arg.get_id(), + field, + default_os, + err + ); + } + } +} diff --git a/vendor/clap/src/builder/mod.rs b/vendor/clap/src/builder/mod.rs new file mode 100644 index 000000000..098ad576e --- /dev/null +++ b/vendor/clap/src/builder/mod.rs @@ -0,0 +1,60 @@ +//! Define [`Command`] line [arguments][`Arg`] + +mod action; +mod app_settings; +mod arg; +mod arg_group; +mod arg_predicate; +mod arg_settings; +mod command; +mod os_str; +mod possible_value; +mod range; +mod resettable; +mod str; +mod styled_str; +mod value_hint; +mod value_parser; + +#[cfg(debug_assertions)] +mod debug_asserts; + +#[cfg(test)] +mod tests; + +pub use self::str::Str; +pub use action::ArgAction; +pub use arg::Arg; +pub use arg_group::ArgGroup; +pub use arg_predicate::ArgPredicate; +pub use command::Command; +pub use os_str::OsStr; +pub use possible_value::PossibleValue; +pub use range::ValueRange; +pub use resettable::IntoResettable; +pub use resettable::Resettable; +pub use styled_str::StyledStr; +pub use value_hint::ValueHint; +pub use value_parser::_AutoValueParser; +pub use value_parser::via_prelude; +pub use value_parser::BoolValueParser; +pub use value_parser::BoolishValueParser; +pub use value_parser::EnumValueParser; +pub use value_parser::FalseyValueParser; +pub use value_parser::MapValueParser; +pub use value_parser::NonEmptyStringValueParser; +pub use value_parser::OsStringValueParser; +pub use value_parser::PathBufValueParser; +pub use value_parser::PossibleValuesParser; +pub use value_parser::RangedI64ValueParser; +pub use value_parser::RangedU64ValueParser; +pub use value_parser::StringValueParser; +pub use value_parser::TypedValueParser; +pub use value_parser::ValueParser; +pub use value_parser::ValueParserFactory; +pub use value_parser::_AnonymousValueParser; + +#[allow(unused_imports)] +pub(crate) use self::str::Inner as StrInner; +pub(crate) use action::CountType; +pub(crate) use arg_settings::{ArgFlags, ArgSettings}; diff --git a/vendor/clap/src/builder/os_str.rs b/vendor/clap/src/builder/os_str.rs new file mode 100644 index 000000000..bb2370deb --- /dev/null +++ b/vendor/clap/src/builder/os_str.rs @@ -0,0 +1,336 @@ +use crate::builder::Str; + +/// A UTF-8-encoded fixed string +/// +/// **NOTE:** To support dynamic values (i.e. `OsString`), enable the [`string` +/// feature][crate::_features] +#[derive(Default, Clone, Eq, PartialEq, PartialOrd, Ord, Hash)] +pub struct OsStr { + name: Inner, +} + +impl OsStr { + #[cfg(feature = "string")] + pub(crate) fn from_string(name: std::ffi::OsString) -> Self { + Self { + name: Inner::from_string(name), + } + } + + #[cfg(feature = "string")] + pub(crate) fn from_ref(name: &std::ffi::OsStr) -> Self { + Self { + name: Inner::from_ref(name), + } + } + + pub(crate) fn from_static_ref(name: &'static std::ffi::OsStr) -> Self { + Self { + name: Inner::from_static_ref(name), + } + } + + /// Get the raw string as an `std::ffi::OsStr` + pub fn as_os_str(&self) -> &std::ffi::OsStr { + self.name.as_os_str() + } + + /// Get the raw string as an `OsString` + pub fn to_os_string(&self) -> std::ffi::OsString { + self.as_os_str().to_owned() + } +} + +impl From<&'_ OsStr> for OsStr { + fn from(id: &'_ OsStr) -> Self { + id.clone() + } +} + +#[cfg(feature = "string")] +impl From<Str> for OsStr { + fn from(id: Str) -> Self { + match id.into_inner() { + crate::builder::StrInner::Static(s) => Self::from_static_ref(std::ffi::OsStr::new(s)), + crate::builder::StrInner::Owned(s) => Self::from_ref(std::ffi::OsStr::new(s.as_ref())), + } + } +} + +#[cfg(not(feature = "string"))] +impl From<Str> for OsStr { + fn from(id: Str) -> Self { + Self::from_static_ref(std::ffi::OsStr::new(id.into_inner().0)) + } +} + +#[cfg(feature = "perf")] +impl From<&'_ Str> for OsStr { + fn from(id: &'_ Str) -> Self { + match id.clone().into_inner() { + crate::builder::StrInner::Static(s) => Self::from_static_ref(std::ffi::OsStr::new(s)), + crate::builder::StrInner::Owned(s) => Self::from_ref(std::ffi::OsStr::new(s.as_ref())), + } + } +} + +impl From<&'_ Str> for OsStr { + fn from(id: &'_ Str) -> Self { + id.clone().into() + } +} + +#[cfg(feature = "string")] +impl From<std::ffi::OsString> for OsStr { + fn from(name: std::ffi::OsString) -> Self { + Self::from_string(name) + } +} + +#[cfg(feature = "string")] +impl From<&'_ std::ffi::OsString> for OsStr { + fn from(name: &'_ std::ffi::OsString) -> Self { + Self::from_ref(name.as_os_str()) + } +} + +#[cfg(feature = "string")] +impl From<std::string::String> for OsStr { + fn from(name: std::string::String) -> Self { + Self::from_string(name.into()) + } +} + +#[cfg(feature = "string")] +impl From<&'_ std::string::String> for OsStr { + fn from(name: &'_ std::string::String) -> Self { + Self::from_ref(name.as_str().as_ref()) + } +} + +impl From<&'static std::ffi::OsStr> for OsStr { + fn from(name: &'static std::ffi::OsStr) -> Self { + Self::from_static_ref(name) + } +} + +impl From<&'_ &'static std::ffi::OsStr> for OsStr { + fn from(name: &'_ &'static std::ffi::OsStr) -> Self { + Self::from_static_ref(name) + } +} + +impl From<&'static str> for OsStr { + fn from(name: &'static str) -> Self { + Self::from_static_ref(name.as_ref()) + } +} + +impl From<&'_ &'static str> for OsStr { + fn from(name: &'_ &'static str) -> Self { + Self::from_static_ref((*name).as_ref()) + } +} + +impl From<OsStr> for std::ffi::OsString { + fn from(name: OsStr) -> Self { + name.name.into_os_string() + } +} + +impl From<OsStr> for std::path::PathBuf { + fn from(name: OsStr) -> Self { + std::ffi::OsString::from(name).into() + } +} + +impl std::fmt::Debug for OsStr { + #[inline] + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + std::fmt::Debug::fmt(self.as_os_str(), f) + } +} + +impl std::ops::Deref for OsStr { + type Target = std::ffi::OsStr; + + #[inline] + fn deref(&self) -> &std::ffi::OsStr { + self.as_os_str() + } +} + +impl AsRef<std::ffi::OsStr> for OsStr { + #[inline] + fn as_ref(&self) -> &std::ffi::OsStr { + self.as_os_str() + } +} + +impl AsRef<std::path::Path> for OsStr { + #[inline] + fn as_ref(&self) -> &std::path::Path { + std::path::Path::new(self) + } +} + +impl std::borrow::Borrow<std::ffi::OsStr> for OsStr { + #[inline] + fn borrow(&self) -> &std::ffi::OsStr { + self.as_os_str() + } +} + +impl PartialEq<str> for OsStr { + #[inline] + fn eq(&self, other: &str) -> bool { + PartialEq::eq(self.as_os_str(), other) + } +} +impl PartialEq<OsStr> for str { + #[inline] + fn eq(&self, other: &OsStr) -> bool { + PartialEq::eq(self, other.as_os_str()) + } +} + +impl PartialEq<&'_ str> for OsStr { + #[inline] + fn eq(&self, other: &&str) -> bool { + PartialEq::eq(self.as_os_str(), *other) + } +} +impl PartialEq<OsStr> for &'_ str { + #[inline] + fn eq(&self, other: &OsStr) -> bool { + PartialEq::eq(*self, other.as_os_str()) + } +} + +impl PartialEq<&'_ std::ffi::OsStr> for OsStr { + #[inline] + fn eq(&self, other: &&std::ffi::OsStr) -> bool { + PartialEq::eq(self.as_os_str(), *other) + } +} +impl PartialEq<OsStr> for &'_ std::ffi::OsStr { + #[inline] + fn eq(&self, other: &OsStr) -> bool { + PartialEq::eq(*self, other.as_os_str()) + } +} + +impl PartialEq<std::string::String> for OsStr { + #[inline] + fn eq(&self, other: &std::string::String) -> bool { + PartialEq::eq(self.as_os_str(), other.as_str()) + } +} +impl PartialEq<OsStr> for std::string::String { + #[inline] + fn eq(&self, other: &OsStr) -> bool { + PartialEq::eq(self.as_str(), other.as_os_str()) + } +} + +impl PartialEq<std::ffi::OsString> for OsStr { + #[inline] + fn eq(&self, other: &std::ffi::OsString) -> bool { + PartialEq::eq(self.as_os_str(), other.as_os_str()) + } +} +impl PartialEq<OsStr> for std::ffi::OsString { + #[inline] + fn eq(&self, other: &OsStr) -> bool { + PartialEq::eq(self.as_os_str(), other.as_os_str()) + } +} + +#[cfg(feature = "string")] +pub(crate) mod inner { + #[derive(Clone)] + pub(crate) enum Inner { + Static(&'static std::ffi::OsStr), + Owned(Box<std::ffi::OsStr>), + } + + impl Inner { + pub(crate) fn from_string(name: std::ffi::OsString) -> Self { + Self::Owned(name.into_boxed_os_str()) + } + + pub(crate) fn from_ref(name: &std::ffi::OsStr) -> Self { + Self::Owned(Box::from(name)) + } + + pub(crate) fn from_static_ref(name: &'static std::ffi::OsStr) -> Self { + Self::Static(name) + } + + pub(crate) fn as_os_str(&self) -> &std::ffi::OsStr { + match self { + Self::Static(s) => s, + Self::Owned(s) => s.as_ref(), + } + } + + pub(crate) fn into_os_string(self) -> std::ffi::OsString { + self.as_os_str().to_owned() + } + } +} + +#[cfg(not(feature = "string"))] +pub(crate) mod inner { + #[derive(Clone)] + pub(crate) struct Inner(&'static std::ffi::OsStr); + + impl Inner { + pub(crate) fn from_static_ref(name: &'static std::ffi::OsStr) -> Self { + Self(name) + } + + pub(crate) fn as_os_str(&self) -> &std::ffi::OsStr { + self.0 + } + + pub(crate) fn into_os_string(self) -> std::ffi::OsString { + self.as_os_str().to_owned() + } + } +} + +pub(crate) use inner::Inner; + +impl Default for Inner { + fn default() -> Self { + Self::from_static_ref(std::ffi::OsStr::new("")) + } +} + +impl PartialEq for Inner { + fn eq(&self, other: &Inner) -> bool { + self.as_os_str() == other.as_os_str() + } +} + +impl PartialOrd for Inner { + fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> { + self.as_os_str().partial_cmp(other.as_os_str()) + } +} + +impl Ord for Inner { + fn cmp(&self, other: &Inner) -> std::cmp::Ordering { + self.as_os_str().cmp(other.as_os_str()) + } +} + +impl Eq for Inner {} + +impl std::hash::Hash for Inner { + #[inline] + fn hash<H: std::hash::Hasher>(&self, state: &mut H) { + self.as_os_str().hash(state); + } +} diff --git a/vendor/clap/src/builder/possible_value.rs b/vendor/clap/src/builder/possible_value.rs new file mode 100644 index 000000000..7a313ad25 --- /dev/null +++ b/vendor/clap/src/builder/possible_value.rs @@ -0,0 +1,234 @@ +use crate::builder::IntoResettable; +use crate::builder::Str; +use crate::builder::StyledStr; +use crate::util::eq_ignore_case; + +/// A possible value of an argument. +/// +/// This is used for specifying [possible values] of [Args]. +/// +/// See also [`PossibleValuesParser`][crate::builder::PossibleValuesParser] +/// +/// **NOTE:** Most likely you can use strings, rather than `PossibleValue` as it is only required +/// to [hide] single values from help messages and shell completions or to attach [help] to +/// possible values. +/// +/// # Examples +/// +/// ```rust +/// # use clap::{Arg, builder::PossibleValue, ArgAction}; +/// let cfg = Arg::new("config") +/// .action(ArgAction::Set) +/// .value_name("FILE") +/// .value_parser([ +/// PossibleValue::new("fast"), +/// PossibleValue::new("slow").help("slower than fast"), +/// PossibleValue::new("secret speed").hide(true) +/// ]); +/// ``` +/// +/// [Args]: crate::Arg +/// [possible values]: crate::builder::ValueParser::possible_values +/// [hide]: PossibleValue::hide() +/// [help]: PossibleValue::help() +#[derive(Debug, Default, Clone, PartialEq, Eq)] +pub struct PossibleValue { + name: Str, + help: Option<StyledStr>, + aliases: Vec<Str>, // (name, visible) + hide: bool, +} + +impl PossibleValue { + /// Create a [`PossibleValue`] with its name. + /// + /// The name will be used to decide whether this value was provided by the user to an argument. + /// + /// **NOTE:** In case it is not [hidden] it will also be shown in help messages for arguments + /// that use it as a [possible value] and have not hidden them through [`Arg::hide_possible_values(true)`]. + /// + /// # Examples + /// + /// ```rust + /// # use clap::builder::PossibleValue; + /// PossibleValue::new("fast") + /// # ; + /// ``` + /// [hidden]: PossibleValue::hide + /// [possible value]: crate::builder::PossibleValuesParser + /// [`Arg::hide_possible_values(true)`]: crate::Arg::hide_possible_values() + pub fn new(name: impl Into<Str>) -> Self { + PossibleValue { + name: name.into(), + ..Default::default() + } + } + + /// Sets the help description of the value. + /// + /// This is typically displayed in completions (where supported) and should be a short, one-line + /// description. + /// + /// # Examples + /// + /// ```rust + /// # use clap::builder::PossibleValue; + /// PossibleValue::new("slow") + /// .help("not fast") + /// # ; + /// ``` + #[inline] + #[must_use] + pub fn help(mut self, help: impl IntoResettable<StyledStr>) -> Self { + self.help = help.into_resettable().into_option(); + self + } + + /// Hides this value from help and shell completions. + /// + /// This is an alternative to hiding through [`Arg::hide_possible_values(true)`], if you only + /// want to hide some values. + /// + /// # Examples + /// + /// ```rust + /// # use clap::builder::PossibleValue; + /// PossibleValue::new("secret") + /// .hide(true) + /// # ; + /// ``` + /// [`Arg::hide_possible_values(true)`]: crate::Arg::hide_possible_values() + #[inline] + #[must_use] + pub fn hide(mut self, yes: bool) -> Self { + self.hide = yes; + self + } + + /// Sets a *hidden* alias for this argument value. + /// + /// # Examples + /// + /// ```rust + /// # use clap::builder::PossibleValue; + /// PossibleValue::new("slow") + /// .alias("not-fast") + /// # ; + /// ``` + #[must_use] + pub fn alias(mut self, name: impl IntoResettable<Str>) -> Self { + if let Some(name) = name.into_resettable().into_option() { + self.aliases.push(name); + } else { + self.aliases.clear(); + } + self + } + + /// Sets multiple *hidden* aliases for this argument value. + /// + /// # Examples + /// + /// ```rust + /// # use clap::builder::PossibleValue; + /// PossibleValue::new("slow") + /// .aliases(["not-fast", "snake-like"]) + /// # ; + /// ``` + #[must_use] + pub fn aliases(mut self, names: impl IntoIterator<Item = impl Into<Str>>) -> Self { + self.aliases.extend(names.into_iter().map(|a| a.into())); + self + } +} + +/// Reflection +impl PossibleValue { + /// Get the name of the argument value + #[inline] + pub fn get_name(&self) -> &str { + self.name.as_str() + } + + /// Get the help specified for this argument, if any + #[inline] + pub fn get_help(&self) -> Option<&StyledStr> { + self.help.as_ref() + } + + /// Get the help specified for this argument, if any and the argument + /// value is not hidden + #[inline] + #[cfg(feature = "help")] + pub(crate) fn get_visible_help(&self) -> Option<&StyledStr> { + if !self.hide { + self.get_help() + } else { + None + } + } + + /// Report if [`PossibleValue::hide`] is set + #[inline] + pub fn is_hide_set(&self) -> bool { + self.hide + } + + /// Report if PossibleValue is not hidden and has a help message + pub(crate) fn should_show_help(&self) -> bool { + !self.hide && self.help.is_some() + } + + /// Get the name if argument value is not hidden, `None` otherwise, + /// but wrapped in quotes if it contains whitespace + #[cfg(feature = "help")] + pub(crate) fn get_visible_quoted_name(&self) -> Option<std::borrow::Cow<'_, str>> { + if !self.hide { + Some(if self.name.contains(char::is_whitespace) { + format!("{:?}", self.name).into() + } else { + self.name.as_str().into() + }) + } else { + None + } + } + + /// Returns all valid values of the argument value. + /// + /// Namely the name and all aliases. + pub fn get_name_and_aliases(&self) -> impl Iterator<Item = &str> + '_ { + std::iter::once(self.get_name()).chain(self.aliases.iter().map(|s| s.as_str())) + } + + /// Tests if the value is valid for this argument value + /// + /// The value is valid if it is either the name or one of the aliases. + /// + /// # Examples + /// + /// ```rust + /// # use clap::builder::PossibleValue; + /// let arg_value = PossibleValue::new("fast").alias("not-slow"); + /// + /// assert!(arg_value.matches("fast", false)); + /// assert!(arg_value.matches("not-slow", false)); + /// + /// assert!(arg_value.matches("FAST", true)); + /// assert!(!arg_value.matches("FAST", false)); + /// ``` + pub fn matches(&self, value: &str, ignore_case: bool) -> bool { + if ignore_case { + self.get_name_and_aliases() + .any(|name| eq_ignore_case(name, value)) + } else { + self.get_name_and_aliases().any(|name| name == value) + } + } +} + +impl<S: Into<Str>> From<S> for PossibleValue { + fn from(s: S) -> Self { + Self::new(s) + } +} diff --git a/vendor/clap/src/builder/range.rs b/vendor/clap/src/builder/range.rs new file mode 100644 index 000000000..3f077bd86 --- /dev/null +++ b/vendor/clap/src/builder/range.rs @@ -0,0 +1,283 @@ +/// Values per occurrence for an argument +#[derive(Copy, Clone, PartialEq, Eq, Hash)] +pub struct ValueRange { + start_inclusive: usize, + end_inclusive: usize, +} + +impl ValueRange { + /// Nor argument values, or a flag + pub const EMPTY: Self = Self { + start_inclusive: 0, + end_inclusive: 0, + }; + + /// A single argument value, the most common case for options + pub const SINGLE: Self = Self { + start_inclusive: 1, + end_inclusive: 1, + }; + + /// Create a range + /// + /// # Panics + /// + /// If the end is less than the start + /// + /// # Examples + /// + /// ``` + /// # use clap::builder::ValueRange; + /// let range = ValueRange::new(5); + /// let range = ValueRange::new(5..10); + /// let range = ValueRange::new(5..=10); + /// let range = ValueRange::new(5..); + /// let range = ValueRange::new(..10); + /// let range = ValueRange::new(..=10); + /// ``` + /// + /// While this will panic: + /// ```should_panic + /// # use clap::builder::ValueRange; + /// let range = ValueRange::new(10..5); // Panics! + /// ``` + pub fn new(range: impl Into<Self>) -> Self { + range.into() + } + + pub(crate) fn raw(start_inclusive: usize, end_inclusive: usize) -> Self { + debug_assert!(start_inclusive <= end_inclusive); + Self { + start_inclusive, + end_inclusive, + } + } + + /// Fewest number of values the argument accepts + pub fn min_values(&self) -> usize { + self.start_inclusive + } + + /// Most number of values the argument accepts + pub fn max_values(&self) -> usize { + self.end_inclusive + } + + /// Report whether the argument takes any values (ie is a flag) + /// + /// # Examples + /// + /// ``` + /// # use clap::builder::ValueRange; + /// let range = ValueRange::new(5); + /// assert!(range.takes_values()); + /// + /// let range = ValueRange::new(0); + /// assert!(!range.takes_values()); + /// ``` + pub fn takes_values(&self) -> bool { + self.end_inclusive != 0 + } + + pub(crate) fn is_unbounded(&self) -> bool { + self.end_inclusive == usize::MAX + } + + pub(crate) fn is_fixed(&self) -> bool { + self.start_inclusive == self.end_inclusive + } + + pub(crate) fn is_multiple(&self) -> bool { + self.start_inclusive != self.end_inclusive || 1 < self.start_inclusive + } + + pub(crate) fn num_values(&self) -> Option<usize> { + self.is_fixed().then_some(self.start_inclusive) + } + + pub(crate) fn accepts_more(&self, current: usize) -> bool { + current < self.end_inclusive + } +} + +impl std::ops::RangeBounds<usize> for ValueRange { + fn start_bound(&self) -> std::ops::Bound<&usize> { + std::ops::Bound::Included(&self.start_inclusive) + } + + fn end_bound(&self) -> std::ops::Bound<&usize> { + std::ops::Bound::Included(&self.end_inclusive) + } +} + +impl Default for ValueRange { + fn default() -> Self { + Self::SINGLE + } +} + +impl From<usize> for ValueRange { + fn from(fixed: usize) -> Self { + (fixed..=fixed).into() + } +} + +impl From<std::ops::Range<usize>> for ValueRange { + fn from(range: std::ops::Range<usize>) -> Self { + let start_inclusive = range.start; + let end_inclusive = range.end.saturating_sub(1); + Self::raw(start_inclusive, end_inclusive) + } +} + +impl From<std::ops::RangeFull> for ValueRange { + fn from(_: std::ops::RangeFull) -> Self { + let start_inclusive = 0; + let end_inclusive = usize::MAX; + Self::raw(start_inclusive, end_inclusive) + } +} + +impl From<std::ops::RangeFrom<usize>> for ValueRange { + fn from(range: std::ops::RangeFrom<usize>) -> Self { + let start_inclusive = range.start; + let end_inclusive = usize::MAX; + Self::raw(start_inclusive, end_inclusive) + } +} + +impl From<std::ops::RangeTo<usize>> for ValueRange { + fn from(range: std::ops::RangeTo<usize>) -> Self { + let start_inclusive = 0; + let end_inclusive = range.end.saturating_sub(1); + Self::raw(start_inclusive, end_inclusive) + } +} + +impl From<std::ops::RangeInclusive<usize>> for ValueRange { + fn from(range: std::ops::RangeInclusive<usize>) -> Self { + let start_inclusive = *range.start(); + let end_inclusive = *range.end(); + Self::raw(start_inclusive, end_inclusive) + } +} + +impl From<std::ops::RangeToInclusive<usize>> for ValueRange { + fn from(range: std::ops::RangeToInclusive<usize>) -> Self { + let start_inclusive = 0; + let end_inclusive = range.end; + Self::raw(start_inclusive, end_inclusive) + } +} + +impl std::fmt::Display for ValueRange { + fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result { + ok!(self.start_inclusive.fmt(f)); + if !self.is_fixed() { + ok!("..=".fmt(f)); + ok!(self.end_inclusive.fmt(f)); + } + Ok(()) + } +} + +impl std::fmt::Debug for ValueRange { + fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result { + write!(f, "{}", self) + } +} + +#[cfg(test)] +mod test { + use super::*; + + use std::ops::RangeBounds; + + #[test] + fn from_fixed() { + let range: ValueRange = 5.into(); + assert_eq!(range.start_bound(), std::ops::Bound::Included(&5)); + assert_eq!(range.end_bound(), std::ops::Bound::Included(&5)); + assert!(range.is_fixed()); + assert!(range.is_multiple()); + assert_eq!(range.num_values(), Some(5)); + assert!(range.takes_values()); + } + + #[test] + fn from_fixed_empty() { + let range: ValueRange = 0.into(); + assert_eq!(range.start_bound(), std::ops::Bound::Included(&0)); + assert_eq!(range.end_bound(), std::ops::Bound::Included(&0)); + assert!(range.is_fixed()); + assert!(!range.is_multiple()); + assert_eq!(range.num_values(), Some(0)); + assert!(!range.takes_values()); + } + + #[test] + fn from_range() { + let range: ValueRange = (5..10).into(); + assert_eq!(range.start_bound(), std::ops::Bound::Included(&5)); + assert_eq!(range.end_bound(), std::ops::Bound::Included(&9)); + assert!(!range.is_fixed()); + assert!(range.is_multiple()); + assert_eq!(range.num_values(), None); + assert!(range.takes_values()); + } + + #[test] + fn from_range_inclusive() { + let range: ValueRange = (5..=10).into(); + assert_eq!(range.start_bound(), std::ops::Bound::Included(&5)); + assert_eq!(range.end_bound(), std::ops::Bound::Included(&10)); + assert!(!range.is_fixed()); + assert!(range.is_multiple()); + assert_eq!(range.num_values(), None); + assert!(range.takes_values()); + } + + #[test] + fn from_range_full() { + let range: ValueRange = (..).into(); + assert_eq!(range.start_bound(), std::ops::Bound::Included(&0)); + assert_eq!(range.end_bound(), std::ops::Bound::Included(&usize::MAX)); + assert!(!range.is_fixed()); + assert!(range.is_multiple()); + assert_eq!(range.num_values(), None); + assert!(range.takes_values()); + } + + #[test] + fn from_range_from() { + let range: ValueRange = (5..).into(); + assert_eq!(range.start_bound(), std::ops::Bound::Included(&5)); + assert_eq!(range.end_bound(), std::ops::Bound::Included(&usize::MAX)); + assert!(!range.is_fixed()); + assert!(range.is_multiple()); + assert_eq!(range.num_values(), None); + assert!(range.takes_values()); + } + + #[test] + fn from_range_to() { + let range: ValueRange = (..10).into(); + assert_eq!(range.start_bound(), std::ops::Bound::Included(&0)); + assert_eq!(range.end_bound(), std::ops::Bound::Included(&9)); + assert!(!range.is_fixed()); + assert!(range.is_multiple()); + assert_eq!(range.num_values(), None); + assert!(range.takes_values()); + } + + #[test] + fn from_range_to_inclusive() { + let range: ValueRange = (..=10).into(); + assert_eq!(range.start_bound(), std::ops::Bound::Included(&0)); + assert_eq!(range.end_bound(), std::ops::Bound::Included(&10)); + assert!(!range.is_fixed()); + assert!(range.is_multiple()); + assert_eq!(range.num_values(), None); + assert!(range.takes_values()); + } +} diff --git a/vendor/clap/src/builder/resettable.rs b/vendor/clap/src/builder/resettable.rs new file mode 100644 index 000000000..e0b82b11b --- /dev/null +++ b/vendor/clap/src/builder/resettable.rs @@ -0,0 +1,211 @@ +// Unlike `impl Into<Option<T>>` or `Option<impl Into<T>>`, this isn't ambiguous for the `None` +// case. + +use crate::builder::ArgAction; +use crate::builder::OsStr; +use crate::builder::Str; +use crate::builder::StyledStr; +use crate::builder::ValueHint; +use crate::builder::ValueParser; +use crate::builder::ValueRange; + +/// Clearable builder value +/// +/// This allows a builder function to both accept any value that can [`Into::into`] `T` (like +/// `&str` into `OsStr`) as well as `None` to reset it to the default. This is needed to +/// workaround a limitation where you can't have a function argument that is `impl Into<Option<T>>` +/// where `T` is `impl Into<S>` accept `None` as its type is ambiguous. +/// +/// # Example +/// +/// ```rust +/// # use clap::Command; +/// # use clap::Arg; +/// fn common() -> Command { +/// Command::new("cli") +/// .arg(Arg::new("input").short('i').long("input")) +/// } +/// let mut command = common(); +/// command.mut_arg("input", |arg| arg.short(None)); +/// ``` +#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)] +pub enum Resettable<T> { + /// Overwrite builder value + Value(T), + /// Reset builder value + Reset, +} + +impl<T> Resettable<T> { + pub(crate) fn into_option(self) -> Option<T> { + match self { + Self::Value(t) => Some(t), + Self::Reset => None, + } + } +} + +impl<T> From<T> for Resettable<T> { + fn from(other: T) -> Self { + Self::Value(other) + } +} + +impl<T> From<Option<T>> for Resettable<T> { + fn from(other: Option<T>) -> Self { + match other { + Some(inner) => Self::Value(inner), + None => Self::Reset, + } + } +} + +/// Convert to the intended resettable type +pub trait IntoResettable<T> { + /// Convert to the intended resettable type + fn into_resettable(self) -> Resettable<T>; +} + +impl IntoResettable<char> for Option<char> { + fn into_resettable(self) -> Resettable<char> { + match self { + Some(s) => Resettable::Value(s), + None => Resettable::Reset, + } + } +} + +impl IntoResettable<usize> for Option<usize> { + fn into_resettable(self) -> Resettable<usize> { + match self { + Some(s) => Resettable::Value(s), + None => Resettable::Reset, + } + } +} + +impl IntoResettable<ArgAction> for Option<ArgAction> { + fn into_resettable(self) -> Resettable<ArgAction> { + match self { + Some(s) => Resettable::Value(s), + None => Resettable::Reset, + } + } +} + +impl IntoResettable<ValueHint> for Option<ValueHint> { + fn into_resettable(self) -> Resettable<ValueHint> { + match self { + Some(s) => Resettable::Value(s), + None => Resettable::Reset, + } + } +} + +impl IntoResettable<ValueParser> for Option<ValueParser> { + fn into_resettable(self) -> Resettable<ValueParser> { + match self { + Some(s) => Resettable::Value(s), + None => Resettable::Reset, + } + } +} + +impl IntoResettable<StyledStr> for Option<&'static str> { + fn into_resettable(self) -> Resettable<StyledStr> { + match self { + Some(s) => Resettable::Value(s.into()), + None => Resettable::Reset, + } + } +} + +impl IntoResettable<OsStr> for Option<&'static str> { + fn into_resettable(self) -> Resettable<OsStr> { + match self { + Some(s) => Resettable::Value(s.into()), + None => Resettable::Reset, + } + } +} + +impl IntoResettable<Str> for Option<&'static str> { + fn into_resettable(self) -> Resettable<Str> { + match self { + Some(s) => Resettable::Value(s.into()), + None => Resettable::Reset, + } + } +} + +impl<T> IntoResettable<T> for Resettable<T> { + fn into_resettable(self) -> Resettable<T> { + self + } +} + +impl IntoResettable<char> for char { + fn into_resettable(self) -> Resettable<char> { + Resettable::Value(self) + } +} + +impl IntoResettable<usize> for usize { + fn into_resettable(self) -> Resettable<usize> { + Resettable::Value(self) + } +} + +impl IntoResettable<ArgAction> for ArgAction { + fn into_resettable(self) -> Resettable<ArgAction> { + Resettable::Value(self) + } +} + +impl IntoResettable<ValueHint> for ValueHint { + fn into_resettable(self) -> Resettable<ValueHint> { + Resettable::Value(self) + } +} + +impl<I: Into<ValueRange>> IntoResettable<ValueRange> for I { + fn into_resettable(self) -> Resettable<ValueRange> { + Resettable::Value(self.into()) + } +} + +impl<I: Into<ValueParser>> IntoResettable<ValueParser> for I { + fn into_resettable(self) -> Resettable<ValueParser> { + Resettable::Value(self.into()) + } +} + +impl<I: Into<String>> IntoResettable<String> for I { + fn into_resettable(self) -> Resettable<String> { + Resettable::Value(self.into()) + } +} + +impl<I: Into<StyledStr>> IntoResettable<StyledStr> for I { + fn into_resettable(self) -> Resettable<StyledStr> { + Resettable::Value(self.into()) + } +} + +impl<I: Into<OsStr>> IntoResettable<OsStr> for I { + fn into_resettable(self) -> Resettable<OsStr> { + Resettable::Value(self.into()) + } +} + +impl<I: Into<Str>> IntoResettable<Str> for I { + fn into_resettable(self) -> Resettable<Str> { + Resettable::Value(self.into()) + } +} + +impl<I: Into<crate::Id>> IntoResettable<crate::Id> for I { + fn into_resettable(self) -> Resettable<crate::Id> { + Resettable::Value(self.into()) + } +} diff --git a/vendor/clap/src/builder/str.rs b/vendor/clap/src/builder/str.rs new file mode 100644 index 000000000..c6689d310 --- /dev/null +++ b/vendor/clap/src/builder/str.rs @@ -0,0 +1,307 @@ +/// A UTF-8-encoded fixed string +/// +/// **NOTE:** To support dynamic values (i.e. `String`), enable the [`string` +/// feature][crate::_features] +#[derive(Default, Clone, Eq, PartialEq, PartialOrd, Ord, Hash)] +pub struct Str { + name: Inner, +} + +impl Str { + #[cfg(feature = "string")] + pub(crate) fn from_string(name: std::string::String) -> Self { + Self { + name: Inner::from_string(name), + } + } + + #[cfg(feature = "string")] + pub(crate) fn from_ref(name: &str) -> Self { + Self { + name: Inner::from_ref(name), + } + } + + pub(crate) fn from_static_ref(name: &'static str) -> Self { + Self { + name: Inner::from_static_ref(name), + } + } + + pub(crate) fn into_inner(self) -> Inner { + self.name + } + + /// Get the raw string of the `Str` + pub fn as_str(&self) -> &str { + self.name.as_str() + } +} + +impl From<&'_ Str> for Str { + fn from(id: &'_ Str) -> Self { + id.clone() + } +} + +#[cfg(feature = "string")] +impl From<std::string::String> for Str { + fn from(name: std::string::String) -> Self { + Self::from_string(name) + } +} + +#[cfg(feature = "string")] +impl From<&'_ std::string::String> for Str { + fn from(name: &'_ std::string::String) -> Self { + Self::from_ref(name.as_str()) + } +} + +impl From<&'static str> for Str { + fn from(name: &'static str) -> Self { + Self::from_static_ref(name) + } +} + +impl From<&'_ &'static str> for Str { + fn from(name: &'_ &'static str) -> Self { + Self::from_static_ref(name) + } +} + +impl From<Str> for String { + fn from(name: Str) -> Self { + name.name.into_string() + } +} + +impl From<Str> for Vec<u8> { + fn from(name: Str) -> Self { + String::from(name).into() + } +} + +impl From<Str> for std::ffi::OsString { + fn from(name: Str) -> Self { + String::from(name).into() + } +} + +impl From<Str> for std::path::PathBuf { + fn from(name: Str) -> Self { + String::from(name).into() + } +} + +impl std::fmt::Display for Str { + #[inline] + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + std::fmt::Display::fmt(self.as_str(), f) + } +} + +impl std::fmt::Debug for Str { + #[inline] + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + std::fmt::Debug::fmt(self.as_str(), f) + } +} + +impl std::ops::Deref for Str { + type Target = str; + + #[inline] + fn deref(&self) -> &str { + self.as_str() + } +} + +impl AsRef<str> for Str { + #[inline] + fn as_ref(&self) -> &str { + self.as_str() + } +} + +impl AsRef<[u8]> for Str { + #[inline] + fn as_ref(&self) -> &[u8] { + self.as_bytes() + } +} + +impl AsRef<std::ffi::OsStr> for Str { + #[inline] + fn as_ref(&self) -> &std::ffi::OsStr { + (**self).as_ref() + } +} + +impl AsRef<std::path::Path> for Str { + #[inline] + fn as_ref(&self) -> &std::path::Path { + std::path::Path::new(self) + } +} + +impl std::borrow::Borrow<str> for Str { + #[inline] + fn borrow(&self) -> &str { + self.as_str() + } +} + +impl PartialEq<str> for Str { + #[inline] + fn eq(&self, other: &str) -> bool { + PartialEq::eq(self.as_str(), other) + } +} +impl PartialEq<Str> for str { + #[inline] + fn eq(&self, other: &Str) -> bool { + PartialEq::eq(self, other.as_str()) + } +} + +impl PartialEq<&'_ str> for Str { + #[inline] + fn eq(&self, other: &&str) -> bool { + PartialEq::eq(self.as_str(), *other) + } +} +impl PartialEq<Str> for &'_ str { + #[inline] + fn eq(&self, other: &Str) -> bool { + PartialEq::eq(*self, other.as_str()) + } +} + +impl PartialEq<std::ffi::OsStr> for Str { + #[inline] + fn eq(&self, other: &std::ffi::OsStr) -> bool { + PartialEq::eq(self.as_str(), other) + } +} +impl PartialEq<Str> for std::ffi::OsStr { + #[inline] + fn eq(&self, other: &Str) -> bool { + PartialEq::eq(self, other.as_str()) + } +} + +impl PartialEq<&'_ std::ffi::OsStr> for Str { + #[inline] + fn eq(&self, other: &&std::ffi::OsStr) -> bool { + PartialEq::eq(self.as_str(), *other) + } +} +impl PartialEq<Str> for &'_ std::ffi::OsStr { + #[inline] + fn eq(&self, other: &Str) -> bool { + PartialEq::eq(*self, other.as_str()) + } +} + +impl PartialEq<std::string::String> for Str { + #[inline] + fn eq(&self, other: &std::string::String) -> bool { + PartialEq::eq(self.as_str(), other.as_str()) + } +} +impl PartialEq<Str> for std::string::String { + #[inline] + fn eq(&self, other: &Str) -> bool { + PartialEq::eq(self.as_str(), other.as_str()) + } +} + +#[cfg(feature = "string")] +pub(crate) mod inner { + #[derive(Clone)] + pub(crate) enum Inner { + Static(&'static str), + Owned(Box<str>), + } + + impl Inner { + pub(crate) fn from_string(name: std::string::String) -> Self { + Self::Owned(name.into_boxed_str()) + } + + pub(crate) fn from_ref(name: &str) -> Self { + Self::Owned(Box::from(name)) + } + + pub(crate) fn from_static_ref(name: &'static str) -> Self { + Self::Static(name) + } + + pub(crate) fn as_str(&self) -> &str { + match self { + Self::Static(s) => s, + Self::Owned(s) => s.as_ref(), + } + } + + pub(crate) fn into_string(self) -> String { + self.as_str().to_owned() + } + } +} + +#[cfg(not(feature = "string"))] +pub(crate) mod inner { + #[derive(Clone)] + pub(crate) struct Inner(pub(crate) &'static str); + + impl Inner { + pub(crate) fn from_static_ref(name: &'static str) -> Self { + Self(name) + } + + pub(crate) fn as_str(&self) -> &str { + self.0 + } + + pub(crate) fn into_string(self) -> String { + self.as_str().to_owned() + } + } +} + +pub(crate) use inner::Inner; + +impl Default for Inner { + fn default() -> Self { + Self::from_static_ref("") + } +} + +impl PartialEq for Inner { + fn eq(&self, other: &Inner) -> bool { + self.as_str() == other.as_str() + } +} + +impl PartialOrd for Inner { + fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> { + self.as_str().partial_cmp(other.as_str()) + } +} + +impl Ord for Inner { + fn cmp(&self, other: &Inner) -> std::cmp::Ordering { + self.as_str().cmp(other.as_str()) + } +} + +impl Eq for Inner {} + +impl std::hash::Hash for Inner { + #[inline] + fn hash<H: std::hash::Hasher>(&self, state: &mut H) { + self.as_str().hash(state); + } +} diff --git a/vendor/clap/src/builder/styled_str.rs b/vendor/clap/src/builder/styled_str.rs new file mode 100644 index 000000000..d36329dee --- /dev/null +++ b/vendor/clap/src/builder/styled_str.rs @@ -0,0 +1,349 @@ +/// Terminal-styling container +/// +/// For now, this is the same as a [`Str`][crate::builder::Str]. This exists to reserve space in +/// the API for exposing terminal styling. +#[derive(Clone, Default, Debug, PartialEq, Eq)] +pub struct StyledStr { + #[cfg(feature = "color")] + pieces: Vec<(Option<Style>, String)>, + #[cfg(not(feature = "color"))] + pieces: String, +} + +impl StyledStr { + /// Create an empty buffer + #[cfg(feature = "color")] + pub const fn new() -> Self { + Self { pieces: Vec::new() } + } + + /// Create an empty buffer + #[cfg(not(feature = "color"))] + pub const fn new() -> Self { + Self { + pieces: String::new(), + } + } + + /// Display using [ANSI Escape Code](https://en.wikipedia.org/wiki/ANSI_escape_code) styling + #[cfg(feature = "color")] + pub fn ansi(&self) -> impl std::fmt::Display + '_ { + AnsiDisplay { styled: self } + } + + pub(crate) fn header(&mut self, msg: impl Into<String>) { + self.stylize_(Some(Style::Header), msg.into()); + } + + pub(crate) fn literal(&mut self, msg: impl Into<String>) { + self.stylize_(Some(Style::Literal), msg.into()); + } + + pub(crate) fn placeholder(&mut self, msg: impl Into<String>) { + self.stylize_(Some(Style::Placeholder), msg.into()); + } + + #[cfg_attr(not(feature = "error-context"), allow(dead_code))] + pub(crate) fn good(&mut self, msg: impl Into<String>) { + self.stylize_(Some(Style::Good), msg.into()); + } + + #[cfg_attr(not(feature = "error-context"), allow(dead_code))] + pub(crate) fn warning(&mut self, msg: impl Into<String>) { + self.stylize_(Some(Style::Warning), msg.into()); + } + + pub(crate) fn error(&mut self, msg: impl Into<String>) { + self.stylize_(Some(Style::Error), msg.into()); + } + + #[allow(dead_code)] + pub(crate) fn hint(&mut self, msg: impl Into<String>) { + self.stylize_(Some(Style::Hint), msg.into()); + } + + pub(crate) fn none(&mut self, msg: impl Into<String>) { + self.stylize_(None, msg.into()); + } + + pub(crate) fn stylize(&mut self, style: impl Into<Option<Style>>, msg: impl Into<String>) { + self.stylize_(style.into(), msg.into()); + } + + pub(crate) fn trim(&mut self) { + self.trim_start(); + self.trim_end(); + } + + pub(crate) fn trim_start(&mut self) { + if let Some((_, item)) = self.iter_mut().next() { + *item = item.trim_start().to_owned(); + } + } + + #[cfg(feature = "color")] + pub(crate) fn trim_end(&mut self) { + if let Some((_, item)) = self.pieces.last_mut() { + *item = item.trim_end().to_owned(); + } + } + + #[cfg(not(feature = "color"))] + pub(crate) fn trim_end(&mut self) { + self.pieces = self.pieces.trim_end().to_owned(); + } + + #[cfg(feature = "help")] + pub(crate) fn indent(&mut self, initial: &str, trailing: &str) { + if let Some((_, first)) = self.iter_mut().next() { + first.insert_str(0, initial); + } + let mut line_sep = "\n".to_owned(); + line_sep.push_str(trailing); + for (_, content) in self.iter_mut() { + *content = content.replace('\n', &line_sep); + } + } + + #[cfg(all(not(feature = "wrap_help"), feature = "help"))] + pub(crate) fn wrap(&mut self, _hard_width: usize) {} + + #[cfg(feature = "wrap_help")] + pub(crate) fn wrap(&mut self, hard_width: usize) { + let mut wrapper = crate::output::textwrap::wrap_algorithms::LineWrapper::new(hard_width); + for (_, content) in self.iter_mut() { + let mut total = Vec::new(); + for (i, line) in content.split_inclusive('\n').enumerate() { + if 0 < i { + // start of a section does not imply newline + wrapper.reset(); + } + let line = crate::output::textwrap::word_separators::find_words_ascii_space(line) + .collect::<Vec<_>>(); + total.extend(wrapper.wrap(line)); + } + let total = total.join(""); + *content = total; + } + + self.trim_end(); + } + + #[cfg(feature = "color")] + fn stylize_(&mut self, style: Option<Style>, msg: String) { + if !msg.is_empty() { + self.pieces.push((style, msg)); + } + } + + #[cfg(not(feature = "color"))] + fn stylize_(&mut self, _style: Option<Style>, msg: String) { + self.pieces.push_str(&msg); + } + + #[inline(never)] + #[cfg(feature = "help")] + pub(crate) fn display_width(&self) -> usize { + let mut width = 0; + for (_, c) in self.iter() { + width += crate::output::display_width(c); + } + width + } + + #[cfg(feature = "help")] + pub(crate) fn is_empty(&self) -> bool { + self.pieces.is_empty() + } + + #[cfg(feature = "color")] + pub(crate) fn iter(&self) -> impl Iterator<Item = (Option<Style>, &str)> { + self.pieces.iter().map(|(s, c)| (*s, c.as_str())) + } + + #[cfg(not(feature = "color"))] + pub(crate) fn iter(&self) -> impl Iterator<Item = (Option<Style>, &str)> { + [(None, self.pieces.as_str())].into_iter() + } + + #[cfg(feature = "color")] + pub(crate) fn iter_mut(&mut self) -> impl Iterator<Item = (Option<Style>, &mut String)> { + self.pieces.iter_mut().map(|(s, c)| (*s, c)) + } + + #[cfg(not(feature = "color"))] + pub(crate) fn iter_mut(&mut self) -> impl Iterator<Item = (Option<Style>, &mut String)> { + [(None, &mut self.pieces)].into_iter() + } + + #[cfg(feature = "color")] + pub(crate) fn into_iter(self) -> impl Iterator<Item = (Option<Style>, String)> { + self.pieces.into_iter() + } + + #[cfg(not(feature = "color"))] + pub(crate) fn into_iter(self) -> impl Iterator<Item = (Option<Style>, String)> { + [(None, self.pieces)].into_iter() + } + + pub(crate) fn extend( + &mut self, + other: impl IntoIterator<Item = (impl Into<Option<Style>>, impl Into<String>)>, + ) { + for (style, content) in other { + self.stylize(style.into(), content.into()); + } + } + + #[cfg(feature = "color")] + pub(crate) fn write_colored(&self, buffer: &mut termcolor::Buffer) -> std::io::Result<()> { + use std::io::Write; + use termcolor::WriteColor; + + for (style, content) in &self.pieces { + let mut color = termcolor::ColorSpec::new(); + match style { + Some(Style::Header) => { + color.set_bold(true); + color.set_underline(true); + } + Some(Style::Literal) => { + color.set_bold(true); + } + Some(Style::Placeholder) => {} + Some(Style::Good) => { + color.set_fg(Some(termcolor::Color::Green)); + } + Some(Style::Warning) => { + color.set_fg(Some(termcolor::Color::Yellow)); + } + Some(Style::Error) => { + color.set_fg(Some(termcolor::Color::Red)); + color.set_bold(true); + } + Some(Style::Hint) => { + color.set_dimmed(true); + } + None => {} + } + + ok!(buffer.set_color(&color)); + ok!(buffer.write_all(content.as_bytes())); + ok!(buffer.reset()); + } + + Ok(()) + } +} + +impl Default for &'_ StyledStr { + fn default() -> Self { + static DEFAULT: StyledStr = StyledStr::new(); + &DEFAULT + } +} + +impl From<std::string::String> for StyledStr { + fn from(name: std::string::String) -> Self { + let mut styled = StyledStr::new(); + styled.none(name); + styled + } +} + +impl From<&'_ std::string::String> for StyledStr { + fn from(name: &'_ std::string::String) -> Self { + let mut styled = StyledStr::new(); + styled.none(name); + styled + } +} + +impl From<&'static str> for StyledStr { + fn from(name: &'static str) -> Self { + let mut styled = StyledStr::new(); + styled.none(name); + styled + } +} + +impl From<&'_ &'static str> for StyledStr { + fn from(name: &'_ &'static str) -> Self { + StyledStr::from(*name) + } +} + +impl PartialOrd for StyledStr { + fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> { + Some(self.cmp(other)) + } +} + +impl Ord for StyledStr { + fn cmp(&self, other: &Self) -> std::cmp::Ordering { + self.iter().map(cmp_key).cmp(other.iter().map(cmp_key)) + } +} + +fn cmp_key(c: (Option<Style>, &str)) -> (Option<usize>, &str) { + let style = c.0.map(|s| s.as_usize()); + let content = c.1; + (style, content) +} + +/// Color-unaware printing. Never uses coloring. +impl std::fmt::Display for StyledStr { + fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result { + for (_, content) in self.iter() { + ok!(std::fmt::Display::fmt(content, f)); + } + + Ok(()) + } +} + +#[cfg(feature = "color")] +struct AnsiDisplay<'s> { + styled: &'s StyledStr, +} + +#[cfg(feature = "color")] +impl std::fmt::Display for AnsiDisplay<'_> { + fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result { + let mut buffer = termcolor::Buffer::ansi(); + ok!(self + .styled + .write_colored(&mut buffer) + .map_err(|_| std::fmt::Error)); + let buffer = buffer.into_inner(); + let buffer = ok!(String::from_utf8(buffer).map_err(|_| std::fmt::Error)); + ok!(std::fmt::Display::fmt(&buffer, f)); + + Ok(()) + } +} + +#[derive(Copy, Clone, Debug, PartialEq, Eq)] +pub(crate) enum Style { + Header, + Literal, + Placeholder, + Good, + Warning, + Error, + Hint, +} + +impl Style { + fn as_usize(&self) -> usize { + match self { + Self::Header => 0, + Self::Literal => 1, + Self::Placeholder => 2, + Self::Good => 3, + Self::Warning => 4, + Self::Error => 5, + Self::Hint => 6, + } + } +} diff --git a/vendor/clap/src/builder/tests.rs b/vendor/clap/src/builder/tests.rs new file mode 100644 index 000000000..15cb8c4f4 --- /dev/null +++ b/vendor/clap/src/builder/tests.rs @@ -0,0 +1,56 @@ +use crate::Arg; +use crate::Command; + +#[test] +fn propagate_version() { + let mut cmd = Command::new("test") + .propagate_version(true) + .version("1.1") + .subcommand(Command::new("sub1")); + cmd._propagate(); + assert_eq!( + cmd.get_subcommands().next().unwrap().get_version(), + Some("1.1") + ); +} + +#[test] +fn global_setting() { + let mut cmd = Command::new("test") + .disable_version_flag(true) + .subcommand(Command::new("subcmd")); + cmd._propagate(); + assert!(cmd + .get_subcommands() + .find(|s| s.get_name() == "subcmd") + .unwrap() + .is_disable_version_flag_set()); +} + +// This test will *fail to compile* if Command is not Send + Sync +#[test] +fn app_send_sync() { + fn foo<T: Send + Sync>(_: T) {} + foo(Command::new("test")) +} + +#[test] +fn issue_2090() { + let mut cmd = Command::new("cmd") + .disable_version_flag(true) + .subcommand(Command::new("sub")); + cmd._build_self(false); + + assert!(cmd + .get_subcommands() + .next() + .unwrap() + .is_disable_version_flag_set()); +} + +// This test will *fail to compile* if Arg is not Send + Sync +#[test] +fn arg_send_sync() { + fn foo<T: Send + Sync>(_: T) {} + foo(Arg::new("test")) +} diff --git a/vendor/clap/src/builder/value_hint.rs b/vendor/clap/src/builder/value_hint.rs new file mode 100644 index 000000000..812d5d866 --- /dev/null +++ b/vendor/clap/src/builder/value_hint.rs @@ -0,0 +1,95 @@ +use std::str::FromStr; + +/// Provide shell with hint on how to complete an argument. +/// +/// See [Arg::value_hint][crate::Arg::value_hint] to set this on an argument. +/// +/// See the `clap_complete` crate for completion script generation. +/// +/// Overview of which hints are supported by which shell: +/// +/// | Hint | zsh | fish[^1]| +/// | ---------------------- | --- | ------- | +/// | `AnyPath` | Yes | Yes | +/// | `FilePath` | Yes | Yes | +/// | `DirPath` | Yes | Yes | +/// | `ExecutablePath` | Yes | Partial | +/// | `CommandName` | Yes | Yes | +/// | `CommandString` | Yes | Partial | +/// | `CommandWithArguments` | Yes | | +/// | `Username` | Yes | Yes | +/// | `Hostname` | Yes | Yes | +/// | `Url` | Yes | | +/// | `EmailAddress` | Yes | | +/// +/// [^1]: fish completions currently only support named arguments (e.g. -o or --opt), not +/// positional arguments. +#[derive(Debug, PartialEq, Eq, Hash, Copy, Clone)] +#[non_exhaustive] +pub enum ValueHint { + /// Default value if hint is not specified. Follows shell default behavior, which is usually + /// auto-completing filenames. + Unknown, + /// None of the hints below apply. Disables shell completion for this argument. + Other, + /// Any existing path. + AnyPath, + /// Path to a file. + FilePath, + /// Path to a directory. + DirPath, + /// Path to an executable file. + ExecutablePath, + /// Name of a command, without arguments. May be relative to PATH, or full path to executable. + CommandName, + /// A single string containing a command and its arguments. + CommandString, + /// Capture the remaining arguments as a command name and arguments for that command. This is + /// common when writing shell wrappers that execute anther command, for example `sudo` or `env`. + /// + /// This hint is special, the argument must be a positional argument and have + /// [`.num_args(1..)`] and Command must use [`Command::trailing_var_arg(true)`]. The result is that the + /// command line `my_app ls -la /` will be parsed as `["ls", "-la", "/"]` and clap won't try to + /// parse the `-la` argument itself. + /// + /// [`Command::trailing_var_arg(true)`]: crate::Command::trailing_var_arg + /// [`.num_args(1..)`]: crate::Arg::num_args() + CommandWithArguments, + /// Name of a local operating system user. + Username, + /// Host name of a computer. + /// Shells usually parse `/etc/hosts` and `.ssh/known_hosts` to complete hostnames. + Hostname, + /// Complete web address. + Url, + /// Email address. + EmailAddress, +} + +impl Default for ValueHint { + fn default() -> Self { + ValueHint::Unknown + } +} + +impl FromStr for ValueHint { + type Err = String; + fn from_str(s: &str) -> Result<Self, <Self as FromStr>::Err> { + Ok(match &*s.to_ascii_lowercase() { + "unknown" => ValueHint::Unknown, + "other" => ValueHint::Other, + "anypath" => ValueHint::AnyPath, + "filepath" => ValueHint::FilePath, + "dirpath" => ValueHint::DirPath, + "executablepath" => ValueHint::ExecutablePath, + "commandname" => ValueHint::CommandName, + "commandstring" => ValueHint::CommandString, + "commandwitharguments" => ValueHint::CommandWithArguments, + "username" => ValueHint::Username, + "hostname" => ValueHint::Hostname, + "url" => ValueHint::Url, + "emailaddress" => ValueHint::EmailAddress, + _ => return Err(format!("unknown ValueHint: `{}`", s)), + }) + } +} diff --git a/vendor/clap/src/builder/value_parser.rs b/vendor/clap/src/builder/value_parser.rs new file mode 100644 index 000000000..191e8ae76 --- /dev/null +++ b/vendor/clap/src/builder/value_parser.rs @@ -0,0 +1,2435 @@ +use std::convert::TryInto; +use std::ops::RangeBounds; + +use crate::parser::AnyValue; +use crate::parser::AnyValueId; + +/// Parse/validate argument values +/// +/// Specified with [`Arg::value_parser`][crate::Arg::value_parser]. +/// +/// `ValueParser` defines how to convert a raw argument value into a validated and typed value for +/// use within an application. +/// +/// See +/// - [`value_parser!`][crate::value_parser] for automatically selecting an implementation for a given type +/// - [`ValueParser::new`] for additional [`TypedValueParser`] that can be used +/// +/// # Example +/// +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("color") +/// .long("color") +/// .value_parser(["always", "auto", "never"]) +/// .default_value("auto") +/// ) +/// .arg( +/// clap::Arg::new("hostname") +/// .long("hostname") +/// .value_parser(clap::builder::NonEmptyStringValueParser::new()) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ) +/// .arg( +/// clap::Arg::new("port") +/// .long("port") +/// .value_parser(clap::value_parser!(u16).range(3000..)) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut( +/// ["cmd", "--hostname", "rust-lang.org", "--port", "3001"] +/// ).unwrap(); +/// +/// let color: &String = m.get_one("color") +/// .expect("default"); +/// assert_eq!(color, "auto"); +/// +/// let hostname: &String = m.get_one("hostname") +/// .expect("required"); +/// assert_eq!(hostname, "rust-lang.org"); +/// +/// let port: u16 = *m.get_one("port") +/// .expect("required"); +/// assert_eq!(port, 3001); +/// ``` +pub struct ValueParser(ValueParserInner); + +enum ValueParserInner { + // Common enough to optimize and for possible values + Bool, + // Common enough to optimize + String, + // Common enough to optimize + OsString, + // Common enough to optimize + PathBuf, + Other(Box<dyn AnyValueParser>), +} + +impl ValueParser { + /// Custom parser for argument values + /// + /// Pre-existing [`TypedValueParser`] implementations include: + /// - `Fn(&str) -> Result<T, E>` + /// - [`EnumValueParser`] and [`PossibleValuesParser`] for static enumerated values + /// - [`BoolishValueParser`] and [`FalseyValueParser`] for alternative `bool` implementations + /// - [`RangedI64ValueParser`] and [`RangedU64ValueParser`] + /// - [`NonEmptyStringValueParser`] + /// + /// # Example + /// + /// ```rust + /// type EnvVar = (String, Option<String>); + /// fn parse_env_var(env: &str) -> Result<EnvVar, std::io::Error> { + /// if let Some((var, value)) = env.split_once('=') { + /// Ok((var.to_owned(), Some(value.to_owned()))) + /// } else { + /// Ok((env.to_owned(), None)) + /// } + /// } + /// + /// let mut cmd = clap::Command::new("raw") + /// .arg( + /// clap::Arg::new("env") + /// .value_parser(clap::builder::ValueParser::new(parse_env_var)) + /// .required(true) + /// ); + /// + /// let m = cmd.try_get_matches_from_mut(["cmd", "key=value"]).unwrap(); + /// let port: &EnvVar = m.get_one("env") + /// .expect("required"); + /// assert_eq!(*port, ("key".into(), Some("value".into()))); + /// ``` + pub fn new<P>(other: P) -> Self + where + P: TypedValueParser, + { + Self(ValueParserInner::Other(Box::new(other))) + } + + /// [`bool`] parser for argument values + /// + /// See also: + /// - [`BoolishValueParser`] for different human readable bool representations + /// - [`FalseyValueParser`] for assuming non-false is true + /// + /// # Example + /// + /// ```rust + /// let mut cmd = clap::Command::new("raw") + /// .arg( + /// clap::Arg::new("download") + /// .value_parser(clap::value_parser!(bool)) + /// .required(true) + /// ); + /// + /// let m = cmd.try_get_matches_from_mut(["cmd", "true"]).unwrap(); + /// let port: bool = *m.get_one("download") + /// .expect("required"); + /// assert_eq!(port, true); + /// + /// assert!(cmd.try_get_matches_from_mut(["cmd", "forever"]).is_err()); + /// ``` + pub const fn bool() -> Self { + Self(ValueParserInner::Bool) + } + + /// [`String`] parser for argument values + /// + /// See also: + /// - [`NonEmptyStringValueParser`] + /// + /// # Example + /// + /// ```rust + /// let mut cmd = clap::Command::new("raw") + /// .arg( + /// clap::Arg::new("port") + /// .value_parser(clap::value_parser!(String)) + /// .required(true) + /// ); + /// + /// let m = cmd.try_get_matches_from_mut(["cmd", "80"]).unwrap(); + /// let port: &String = m.get_one("port") + /// .expect("required"); + /// assert_eq!(port, "80"); + /// ``` + pub const fn string() -> Self { + Self(ValueParserInner::String) + } + + /// [`OsString`][std::ffi::OsString] parser for argument values + /// + /// # Example + /// + #[cfg_attr(not(unix), doc = " ```ignore")] + #[cfg_attr(unix, doc = " ```rust")] + /// # use clap::{Command, Arg, builder::ValueParser}; + /// use std::ffi::OsString; + /// use std::os::unix::ffi::{OsStrExt,OsStringExt}; + /// let r = Command::new("myprog") + /// .arg( + /// Arg::new("arg") + /// .required(true) + /// .value_parser(ValueParser::os_string()) + /// ) + /// .try_get_matches_from(vec![ + /// OsString::from("myprog"), + /// OsString::from_vec(vec![0xe9]) + /// ]); + /// + /// assert!(r.is_ok()); + /// let m = r.unwrap(); + /// let arg: &OsString = m.get_one("arg") + /// .expect("required"); + /// assert_eq!(arg.as_bytes(), &[0xe9]); + /// ``` + pub const fn os_string() -> Self { + Self(ValueParserInner::OsString) + } + + /// [`PathBuf`][std::path::PathBuf] parser for argument values + /// + /// # Example + /// + /// ```rust + /// # use std::path::PathBuf; + /// # use std::path::Path; + /// let mut cmd = clap::Command::new("raw") + /// .arg( + /// clap::Arg::new("output") + /// .value_parser(clap::value_parser!(PathBuf)) + /// .required(true) + /// ); + /// + /// let m = cmd.try_get_matches_from_mut(["cmd", "hello.txt"]).unwrap(); + /// let port: &PathBuf = m.get_one("output") + /// .expect("required"); + /// assert_eq!(port, Path::new("hello.txt")); + /// + /// assert!(cmd.try_get_matches_from_mut(["cmd", ""]).is_err()); + /// ``` + pub const fn path_buf() -> Self { + Self(ValueParserInner::PathBuf) + } +} + +impl ValueParser { + /// Parse into a `AnyValue` + /// + /// When `arg` is `None`, an external subcommand value is being parsed. + pub(crate) fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<AnyValue, crate::Error> { + self.any_value_parser().parse_ref(cmd, arg, value) + } + + /// Describes the content of `AnyValue` + pub fn type_id(&self) -> AnyValueId { + self.any_value_parser().type_id() + } + + /// Reflect on enumerated value properties + /// + /// Error checking should not be done with this; it is mostly targeted at user-facing + /// applications like errors and completion. + pub fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + self.any_value_parser().possible_values() + } + + fn any_value_parser(&self) -> &dyn AnyValueParser { + match &self.0 { + ValueParserInner::Bool => &BoolValueParser {}, + ValueParserInner::String => &StringValueParser {}, + ValueParserInner::OsString => &OsStringValueParser {}, + ValueParserInner::PathBuf => &PathBufValueParser {}, + ValueParserInner::Other(o) => o.as_ref(), + } + } +} + +/// Convert a [`TypedValueParser`] to [`ValueParser`] +/// +/// # Example +/// +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("hostname") +/// .long("hostname") +/// .value_parser(clap::builder::NonEmptyStringValueParser::new()) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut( +/// ["cmd", "--hostname", "rust-lang.org"] +/// ).unwrap(); +/// +/// let hostname: &String = m.get_one("hostname") +/// .expect("required"); +/// assert_eq!(hostname, "rust-lang.org"); +/// ``` +impl<P> From<P> for ValueParser +where + P: TypedValueParser + Send + Sync + 'static, +{ + fn from(p: P) -> Self { + Self::new(p) + } +} + +impl From<_AnonymousValueParser> for ValueParser { + fn from(p: _AnonymousValueParser) -> Self { + p.0 + } +} + +/// Create an `i64` [`ValueParser`] from a `N..M` range +/// +/// See [`RangedI64ValueParser`] for more control over the output type. +/// +/// See also [`RangedU64ValueParser`] +/// +/// # Examples +/// +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("port") +/// .long("port") +/// .value_parser(3000..4000) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "--port", "3001"]).unwrap(); +/// let port: i64 = *m.get_one("port") +/// .expect("required"); +/// assert_eq!(port, 3001); +/// ``` +impl From<std::ops::Range<i64>> for ValueParser { + fn from(value: std::ops::Range<i64>) -> Self { + let inner = RangedI64ValueParser::<i64>::new().range(value.start..value.end); + Self::from(inner) + } +} + +/// Create an `i64` [`ValueParser`] from a `N..=M` range +/// +/// See [`RangedI64ValueParser`] for more control over the output type. +/// +/// See also [`RangedU64ValueParser`] +/// +/// # Examples +/// +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("port") +/// .long("port") +/// .value_parser(3000..=4000) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "--port", "3001"]).unwrap(); +/// let port: i64 = *m.get_one("port") +/// .expect("required"); +/// assert_eq!(port, 3001); +/// ``` +impl From<std::ops::RangeInclusive<i64>> for ValueParser { + fn from(value: std::ops::RangeInclusive<i64>) -> Self { + let inner = RangedI64ValueParser::<i64>::new().range(value.start()..=value.end()); + Self::from(inner) + } +} + +/// Create an `i64` [`ValueParser`] from a `N..` range +/// +/// See [`RangedI64ValueParser`] for more control over the output type. +/// +/// See also [`RangedU64ValueParser`] +/// +/// # Examples +/// +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("port") +/// .long("port") +/// .value_parser(3000..) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "--port", "3001"]).unwrap(); +/// let port: i64 = *m.get_one("port") +/// .expect("required"); +/// assert_eq!(port, 3001); +/// ``` +impl From<std::ops::RangeFrom<i64>> for ValueParser { + fn from(value: std::ops::RangeFrom<i64>) -> Self { + let inner = RangedI64ValueParser::<i64>::new().range(value.start..); + Self::from(inner) + } +} + +/// Create an `i64` [`ValueParser`] from a `..M` range +/// +/// See [`RangedI64ValueParser`] for more control over the output type. +/// +/// See also [`RangedU64ValueParser`] +/// +/// # Examples +/// +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("port") +/// .long("port") +/// .value_parser(..3000) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "--port", "80"]).unwrap(); +/// let port: i64 = *m.get_one("port") +/// .expect("required"); +/// assert_eq!(port, 80); +/// ``` +impl From<std::ops::RangeTo<i64>> for ValueParser { + fn from(value: std::ops::RangeTo<i64>) -> Self { + let inner = RangedI64ValueParser::<i64>::new().range(..value.end); + Self::from(inner) + } +} + +/// Create an `i64` [`ValueParser`] from a `..=M` range +/// +/// See [`RangedI64ValueParser`] for more control over the output type. +/// +/// See also [`RangedU64ValueParser`] +/// +/// # Examples +/// +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("port") +/// .long("port") +/// .value_parser(..=3000) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "--port", "80"]).unwrap(); +/// let port: i64 = *m.get_one("port") +/// .expect("required"); +/// assert_eq!(port, 80); +/// ``` +impl From<std::ops::RangeToInclusive<i64>> for ValueParser { + fn from(value: std::ops::RangeToInclusive<i64>) -> Self { + let inner = RangedI64ValueParser::<i64>::new().range(..=value.end); + Self::from(inner) + } +} + +/// Create an `i64` [`ValueParser`] from a `..` range +/// +/// See [`RangedI64ValueParser`] for more control over the output type. +/// +/// See also [`RangedU64ValueParser`] +/// +/// # Examples +/// +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("port") +/// .long("port") +/// .value_parser(..) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "--port", "3001"]).unwrap(); +/// let port: i64 = *m.get_one("port") +/// .expect("required"); +/// assert_eq!(port, 3001); +/// ``` +impl From<std::ops::RangeFull> for ValueParser { + fn from(value: std::ops::RangeFull) -> Self { + let inner = RangedI64ValueParser::<i64>::new().range(value); + Self::from(inner) + } +} + +/// Create a [`ValueParser`] with [`PossibleValuesParser`] +/// +/// See [`PossibleValuesParser`] for more flexibility in creating the +/// [`PossibleValue`][crate::builder::PossibleValue]s. +/// +/// # Examples +/// +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("color") +/// .long("color") +/// .value_parser(["always", "auto", "never"]) +/// .default_value("auto") +/// ); +/// +/// let m = cmd.try_get_matches_from_mut( +/// ["cmd", "--color", "never"] +/// ).unwrap(); +/// +/// let color: &String = m.get_one("color") +/// .expect("default"); +/// assert_eq!(color, "never"); +/// ``` +impl<P, const C: usize> From<[P; C]> for ValueParser +where + P: Into<super::PossibleValue>, +{ + fn from(values: [P; C]) -> Self { + let inner = PossibleValuesParser::from(values); + Self::from(inner) + } +} + +/// Create a [`ValueParser`] with [`PossibleValuesParser`] +/// +/// See [`PossibleValuesParser`] for more flexibility in creating the +/// [`PossibleValue`][crate::builder::PossibleValue]s. +/// +/// # Examples +/// +/// ```rust +/// let possible = vec!["always", "auto", "never"]; +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("color") +/// .long("color") +/// .value_parser(possible) +/// .default_value("auto") +/// ); +/// +/// let m = cmd.try_get_matches_from_mut( +/// ["cmd", "--color", "never"] +/// ).unwrap(); +/// +/// let color: &String = m.get_one("color") +/// .expect("default"); +/// assert_eq!(color, "never"); +/// ``` +impl<P> From<Vec<P>> for ValueParser +where + P: Into<super::PossibleValue>, +{ + fn from(values: Vec<P>) -> Self { + let inner = PossibleValuesParser::from(values); + Self::from(inner) + } +} + +impl std::fmt::Debug for ValueParser { + fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> { + match &self.0 { + ValueParserInner::Bool => f.debug_struct("ValueParser::bool").finish(), + ValueParserInner::String => f.debug_struct("ValueParser::string").finish(), + ValueParserInner::OsString => f.debug_struct("ValueParser::os_string").finish(), + ValueParserInner::PathBuf => f.debug_struct("ValueParser::path_buf").finish(), + ValueParserInner::Other(o) => write!(f, "ValueParser::other({:?})", o.type_id()), + } + } +} + +impl Clone for ValueParser { + fn clone(&self) -> Self { + Self(match &self.0 { + ValueParserInner::Bool => ValueParserInner::Bool, + ValueParserInner::String => ValueParserInner::String, + ValueParserInner::OsString => ValueParserInner::OsString, + ValueParserInner::PathBuf => ValueParserInner::PathBuf, + ValueParserInner::Other(o) => ValueParserInner::Other(o.clone_any()), + }) + } +} + +/// A type-erased wrapper for [`TypedValueParser`]. +trait AnyValueParser: Send + Sync + 'static { + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<AnyValue, crate::Error>; + + fn parse( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: std::ffi::OsString, + ) -> Result<AnyValue, crate::Error>; + + /// Describes the content of `AnyValue` + fn type_id(&self) -> AnyValueId; + + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>>; + + fn clone_any(&self) -> Box<dyn AnyValueParser>; +} + +impl<T, P> AnyValueParser for P +where + T: std::any::Any + Clone + Send + Sync + 'static, + P: TypedValueParser<Value = T>, +{ + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<AnyValue, crate::Error> { + let value = ok!(TypedValueParser::parse_ref(self, cmd, arg, value)); + Ok(AnyValue::new(value)) + } + + fn parse( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: std::ffi::OsString, + ) -> Result<AnyValue, crate::Error> { + let value = ok!(TypedValueParser::parse(self, cmd, arg, value)); + Ok(AnyValue::new(value)) + } + + fn type_id(&self) -> AnyValueId { + AnyValueId::of::<T>() + } + + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + P::possible_values(self) + } + + fn clone_any(&self) -> Box<dyn AnyValueParser> { + Box::new(self.clone()) + } +} + +/// Parse/validate argument values +/// +/// As alternatives to implementing `TypedValueParser`, +/// - Use `Fn(&str) -> Result<T, E>` which implements `TypedValueParser` +/// - [`TypedValueParser::map`] or [`TypedValueParser::try_map`] to adapt an existing `TypedValueParser` +/// +/// See `ValueParserFactory` to register `TypedValueParser::Value` with +/// [`value_parser!`][crate::value_parser]. +/// +/// # Example +/// +#[cfg_attr(not(feature = "error-context"), doc = " ```ignore")] +#[cfg_attr(feature = "error-context", doc = " ```")] +/// # use clap::error::ErrorKind; +/// # use clap::error::ContextKind; +/// # use clap::error::ContextValue; +/// #[derive(Clone)] +/// struct Custom(u32); +/// +/// #[derive(Clone)] +/// struct CustomValueParser; +/// +/// impl clap::builder::TypedValueParser for CustomValueParser { +/// type Value = Custom; +/// +/// fn parse_ref( +/// &self, +/// cmd: &clap::Command, +/// arg: Option<&clap::Arg>, +/// value: &std::ffi::OsStr, +/// ) -> Result<Self::Value, clap::Error> { +/// let inner = clap::value_parser!(u32); +/// let val = inner.parse_ref(cmd, arg, value)?; +/// +/// const INVALID_VALUE: u32 = 10; +/// if val == INVALID_VALUE { +/// let mut err = clap::Error::new(ErrorKind::ValueValidation) +/// .with_cmd(cmd); +/// if let Some(arg) = arg { +/// err.insert(ContextKind::InvalidArg, ContextValue::String(arg.to_string())); +/// } +/// err.insert(ContextKind::InvalidValue, ContextValue::String(INVALID_VALUE.to_string())); +/// return Err(err); +/// } +/// +/// Ok(Custom(val)) +/// } +/// } +/// ``` +pub trait TypedValueParser: Clone + Send + Sync + 'static { + /// Argument's value type + type Value: Send + Sync + Clone; + + /// Parse the argument value + /// + /// When `arg` is `None`, an external subcommand value is being parsed. + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error>; + + /// Parse the argument value + /// + /// When `arg` is `None`, an external subcommand value is being parsed. + fn parse( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: std::ffi::OsString, + ) -> Result<Self::Value, crate::Error> { + self.parse_ref(cmd, arg, &value) + } + + /// Reflect on enumerated value properties + /// + /// Error checking should not be done with this; it is mostly targeted at user-facing + /// applications like errors and completion. + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + None + } + + /// Adapt a `TypedValueParser` from one value to another + /// + /// # Example + /// + /// ```rust + /// # use clap::Command; + /// # use clap::Arg; + /// # use clap::builder::TypedValueParser as _; + /// # use clap::builder::BoolishValueParser; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("flag") + /// .long("flag") + /// .action(clap::ArgAction::SetTrue) + /// .value_parser( + /// BoolishValueParser::new() + /// .map(|b| -> usize { + /// if b { 10 } else { 5 } + /// }) + /// ) + /// ); + /// + /// let matches = cmd.clone().try_get_matches_from(["mycmd", "--flag"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_one::<usize>("flag").copied(), + /// Some(10) + /// ); + /// + /// let matches = cmd.try_get_matches_from(["mycmd"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_one::<usize>("flag").copied(), + /// Some(5) + /// ); + /// ``` + fn map<T, F>(self, func: F) -> MapValueParser<Self, F> + where + T: Send + Sync + Clone, + F: Fn(Self::Value) -> T + Clone, + { + MapValueParser::new(self, func) + } + + /// Adapt a `TypedValueParser` from one value to another + /// + /// # Example + /// + /// ```rust + /// # use std::ffi::OsString; + /// # use std::ffi::OsStr; + /// # use std::path::PathBuf; + /// # use std::path::Path; + /// # use clap::Command; + /// # use clap::Arg; + /// # use clap::builder::TypedValueParser as _; + /// # use clap::builder::OsStringValueParser; + /// let cmd = Command::new("mycmd") + /// .arg( + /// Arg::new("flag") + /// .long("flag") + /// .value_parser( + /// OsStringValueParser::new() + /// .try_map(verify_ext) + /// ) + /// ); + /// + /// fn verify_ext(os: OsString) -> Result<PathBuf, &'static str> { + /// let path = PathBuf::from(os); + /// if path.extension() != Some(OsStr::new("rs")) { + /// return Err("only Rust files are supported"); + /// } + /// Ok(path) + /// } + /// + /// let error = cmd.clone().try_get_matches_from(["mycmd", "--flag", "foo.txt"]).unwrap_err(); + /// error.print(); + /// + /// let matches = cmd.try_get_matches_from(["mycmd", "--flag", "foo.rs"]).unwrap(); + /// assert!(matches.contains_id("flag")); + /// assert_eq!( + /// matches.get_one::<PathBuf>("flag").map(|s| s.as_path()), + /// Some(Path::new("foo.rs")) + /// ); + /// ``` + fn try_map<T, E, F>(self, func: F) -> TryMapValueParser<Self, F> + where + F: Fn(Self::Value) -> Result<T, E> + Clone + Send + Sync + 'static, + T: Send + Sync + Clone, + E: Into<Box<dyn std::error::Error + Send + Sync + 'static>>, + { + TryMapValueParser::new(self, func) + } +} + +impl<F, T, E> TypedValueParser for F +where + F: Fn(&str) -> Result<T, E> + Clone + Send + Sync + 'static, + E: Into<Box<dyn std::error::Error + Send + Sync + 'static>>, + T: Send + Sync + Clone, +{ + type Value = T; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + let value = ok!(value.to_str().ok_or_else(|| { + crate::Error::invalid_utf8( + cmd, + crate::output::Usage::new(cmd).create_usage_with_title(&[]), + ) + })); + let value = ok!((self)(value).map_err(|e| { + let arg = arg + .map(|a| a.to_string()) + .unwrap_or_else(|| "...".to_owned()); + crate::Error::value_validation(arg, value.to_owned(), e.into()).with_cmd(cmd) + })); + Ok(value) + } +} + +/// Implementation for [`ValueParser::string`] +/// +/// Useful for composing new [`TypedValueParser`]s +#[derive(Copy, Clone, Debug)] +#[non_exhaustive] +pub struct StringValueParser {} + +impl StringValueParser { + /// Implementation for [`ValueParser::string`] + pub fn new() -> Self { + Self {} + } +} + +impl TypedValueParser for StringValueParser { + type Value = String; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + TypedValueParser::parse(self, cmd, arg, value.to_owned()) + } + + fn parse( + &self, + cmd: &crate::Command, + _arg: Option<&crate::Arg>, + value: std::ffi::OsString, + ) -> Result<Self::Value, crate::Error> { + let value = ok!(value.into_string().map_err(|_| { + crate::Error::invalid_utf8( + cmd, + crate::output::Usage::new(cmd).create_usage_with_title(&[]), + ) + })); + Ok(value) + } +} + +impl Default for StringValueParser { + fn default() -> Self { + Self::new() + } +} + +/// Implementation for [`ValueParser::os_string`] +/// +/// Useful for composing new [`TypedValueParser`]s +#[derive(Copy, Clone, Debug)] +#[non_exhaustive] +pub struct OsStringValueParser {} + +impl OsStringValueParser { + /// Implementation for [`ValueParser::os_string`] + pub fn new() -> Self { + Self {} + } +} + +impl TypedValueParser for OsStringValueParser { + type Value = std::ffi::OsString; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + TypedValueParser::parse(self, cmd, arg, value.to_owned()) + } + + fn parse( + &self, + _cmd: &crate::Command, + _arg: Option<&crate::Arg>, + value: std::ffi::OsString, + ) -> Result<Self::Value, crate::Error> { + Ok(value) + } +} + +impl Default for OsStringValueParser { + fn default() -> Self { + Self::new() + } +} + +/// Implementation for [`ValueParser::path_buf`] +/// +/// Useful for composing new [`TypedValueParser`]s +#[derive(Copy, Clone, Debug)] +#[non_exhaustive] +pub struct PathBufValueParser {} + +impl PathBufValueParser { + /// Implementation for [`ValueParser::path_buf`] + pub fn new() -> Self { + Self {} + } +} + +impl TypedValueParser for PathBufValueParser { + type Value = std::path::PathBuf; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + TypedValueParser::parse(self, cmd, arg, value.to_owned()) + } + + fn parse( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: std::ffi::OsString, + ) -> Result<Self::Value, crate::Error> { + if value.is_empty() { + return Err(crate::Error::empty_value( + cmd, + &[], + arg.map(ToString::to_string) + .unwrap_or_else(|| "...".to_owned()), + )); + } + Ok(Self::Value::from(value)) + } +} + +impl Default for PathBufValueParser { + fn default() -> Self { + Self::new() + } +} + +/// Parse an [`ValueEnum`][crate::ValueEnum] value. +/// +/// See also: +/// - [`PossibleValuesParser`] +/// +/// # Example +/// +/// ```rust +/// # use std::ffi::OsStr; +/// # use clap::ColorChoice; +/// # use clap::builder::TypedValueParser; +/// # let cmd = clap::Command::new("test"); +/// # let arg = None; +/// +/// // Usage +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("color") +/// .value_parser(clap::builder::EnumValueParser::<ColorChoice>::new()) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "always"]).unwrap(); +/// let port: ColorChoice = *m.get_one("color") +/// .expect("required"); +/// assert_eq!(port, ColorChoice::Always); +/// +/// // Semantics +/// let value_parser = clap::builder::EnumValueParser::<ColorChoice>::new(); +/// // or +/// let value_parser = clap::value_parser!(ColorChoice); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("random")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("")).is_err()); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("always")).unwrap(), ColorChoice::Always); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("auto")).unwrap(), ColorChoice::Auto); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("never")).unwrap(), ColorChoice::Never); +/// ``` +#[derive(Clone, Debug)] +pub struct EnumValueParser<E: crate::ValueEnum + Clone + Send + Sync + 'static>( + std::marker::PhantomData<E>, +); + +impl<E: crate::ValueEnum + Clone + Send + Sync + 'static> EnumValueParser<E> { + /// Parse an [`ValueEnum`][crate::ValueEnum] + pub fn new() -> Self { + let phantom: std::marker::PhantomData<E> = Default::default(); + Self(phantom) + } +} + +impl<E: crate::ValueEnum + Clone + Send + Sync + 'static> TypedValueParser for EnumValueParser<E> { + type Value = E; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + let ignore_case = arg.map(|a| a.is_ignore_case_set()).unwrap_or(false); + let possible_vals = || { + E::value_variants() + .iter() + .filter_map(|v| v.to_possible_value()) + .filter(|v| !v.is_hide_set()) + .map(|v| v.get_name().to_owned()) + .collect::<Vec<_>>() + }; + + let value = ok!(value.to_str().ok_or_else(|| { + crate::Error::invalid_value( + cmd, + value.to_string_lossy().into_owned(), + &possible_vals(), + arg.map(ToString::to_string) + .unwrap_or_else(|| "...".to_owned()), + ) + })); + let value = ok!(E::value_variants() + .iter() + .find(|v| { + v.to_possible_value() + .expect("ValueEnum::value_variants contains only values with a corresponding ValueEnum::to_possible_value") + .matches(value, ignore_case) + }) + .ok_or_else(|| { + crate::Error::invalid_value( + cmd, + value.to_owned(), + &possible_vals(), + arg.map(ToString::to_string) + .unwrap_or_else(|| "...".to_owned()), + ) + })) + .clone(); + Ok(value) + } + + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + Some(Box::new( + E::value_variants() + .iter() + .filter_map(|v| v.to_possible_value()), + )) + } +} + +impl<E: crate::ValueEnum + Clone + Send + Sync + 'static> Default for EnumValueParser<E> { + fn default() -> Self { + Self::new() + } +} + +/// Verify the value is from an enumerated set of [`PossibleValue`][crate::builder::PossibleValue]. +/// +/// See also: +/// - [`EnumValueParser`] for directly supporting [`ValueEnum`][crate::ValueEnum] types +/// - [`TypedValueParser::map`] for adapting values to a more specialized type, like an external +/// enums that can't implement [`ValueEnum`][crate::ValueEnum] +/// +/// # Example +/// +/// Usage: +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("color") +/// .value_parser(clap::builder::PossibleValuesParser::new(["always", "auto", "never"])) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "always"]).unwrap(); +/// let port: &String = m.get_one("color") +/// .expect("required"); +/// assert_eq!(port, "always"); +/// ``` +/// +/// Semantics: +/// ```rust +/// # use std::ffi::OsStr; +/// # use clap::builder::TypedValueParser; +/// # let cmd = clap::Command::new("test"); +/// # let arg = None; +/// let value_parser = clap::builder::PossibleValuesParser::new(["always", "auto", "never"]); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("random")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("")).is_err()); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("always")).unwrap(), "always"); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("auto")).unwrap(), "auto"); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("never")).unwrap(), "never"); +/// ``` +#[derive(Clone, Debug)] +pub struct PossibleValuesParser(Vec<super::PossibleValue>); + +impl PossibleValuesParser { + /// Verify the value is from an enumerated set pf [`PossibleValue`][crate::builder::PossibleValue]. + pub fn new(values: impl Into<PossibleValuesParser>) -> Self { + values.into() + } +} + +impl TypedValueParser for PossibleValuesParser { + type Value = String; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + TypedValueParser::parse(self, cmd, arg, value.to_owned()) + } + + fn parse( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: std::ffi::OsString, + ) -> Result<String, crate::Error> { + let value = ok!(value.into_string().map_err(|_| { + crate::Error::invalid_utf8( + cmd, + crate::output::Usage::new(cmd).create_usage_with_title(&[]), + ) + })); + + let ignore_case = arg.map(|a| a.is_ignore_case_set()).unwrap_or(false); + if self.0.iter().any(|v| v.matches(&value, ignore_case)) { + Ok(value) + } else { + let possible_vals = self + .0 + .iter() + .filter(|v| !v.is_hide_set()) + .map(|v| v.get_name().to_owned()) + .collect::<Vec<_>>(); + + Err(crate::Error::invalid_value( + cmd, + value, + &possible_vals, + arg.map(ToString::to_string) + .unwrap_or_else(|| "...".to_owned()), + )) + } + } + + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + Some(Box::new(self.0.iter().cloned())) + } +} + +impl<I, T> From<I> for PossibleValuesParser +where + I: IntoIterator<Item = T>, + T: Into<super::PossibleValue>, +{ + fn from(values: I) -> Self { + Self(values.into_iter().map(|t| t.into()).collect()) + } +} + +/// Parse number that fall within a range of values +/// +/// **NOTE:** To capture negative values, you will also need to set +/// [`Arg::allow_negative_numbers`][crate::Arg::allow_negative_numbers] or +/// [`Arg::allow_hyphen_values`][crate::Arg::allow_hyphen_values]. +/// +/// # Example +/// +/// Usage: +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("port") +/// .long("port") +/// .value_parser(clap::value_parser!(u16).range(3000..)) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "--port", "3001"]).unwrap(); +/// let port: u16 = *m.get_one("port") +/// .expect("required"); +/// assert_eq!(port, 3001); +/// ``` +/// +/// Semantics: +/// ```rust +/// # use std::ffi::OsStr; +/// # use clap::builder::TypedValueParser; +/// # let cmd = clap::Command::new("test"); +/// # let arg = None; +/// let value_parser = clap::builder::RangedI64ValueParser::<i32>::new().range(-1..200); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("random")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("-200")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("300")).is_err()); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("-1")).unwrap(), -1); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("0")).unwrap(), 0); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("50")).unwrap(), 50); +/// ``` +#[derive(Copy, Clone, Debug)] +pub struct RangedI64ValueParser<T: std::convert::TryFrom<i64> + Clone + Send + Sync = i64> { + bounds: (std::ops::Bound<i64>, std::ops::Bound<i64>), + target: std::marker::PhantomData<T>, +} + +impl<T: std::convert::TryFrom<i64> + Clone + Send + Sync> RangedI64ValueParser<T> { + /// Select full range of `i64` + pub fn new() -> Self { + Self::from(..) + } + + /// Narrow the supported range + pub fn range<B: RangeBounds<i64>>(mut self, range: B) -> Self { + // Consideration: when the user does `value_parser!(u8).range()` + // - Avoid programming mistakes by accidentally expanding the range + // - Make it convenient to limit the range like with `..10` + let start = match range.start_bound() { + l @ std::ops::Bound::Included(i) => { + debug_assert!( + self.bounds.contains(i), + "{} must be in {:?}", + i, + self.bounds + ); + l.cloned() + } + l @ std::ops::Bound::Excluded(i) => { + debug_assert!( + self.bounds.contains(&i.saturating_add(1)), + "{} must be in {:?}", + i, + self.bounds + ); + l.cloned() + } + std::ops::Bound::Unbounded => self.bounds.start_bound().cloned(), + }; + let end = match range.end_bound() { + l @ std::ops::Bound::Included(i) => { + debug_assert!( + self.bounds.contains(i), + "{} must be in {:?}", + i, + self.bounds + ); + l.cloned() + } + l @ std::ops::Bound::Excluded(i) => { + debug_assert!( + self.bounds.contains(&i.saturating_sub(1)), + "{} must be in {:?}", + i, + self.bounds + ); + l.cloned() + } + std::ops::Bound::Unbounded => self.bounds.end_bound().cloned(), + }; + self.bounds = (start, end); + self + } + + fn format_bounds(&self) -> String { + let mut result = match self.bounds.0 { + std::ops::Bound::Included(i) => i.to_string(), + std::ops::Bound::Excluded(i) => i.saturating_add(1).to_string(), + std::ops::Bound::Unbounded => i64::MIN.to_string(), + }; + result.push_str(".."); + match self.bounds.1 { + std::ops::Bound::Included(i) => { + result.push('='); + result.push_str(&i.to_string()); + } + std::ops::Bound::Excluded(i) => { + result.push_str(&i.to_string()); + } + std::ops::Bound::Unbounded => { + result.push_str(&i64::MAX.to_string()); + } + } + result + } +} + +impl<T: std::convert::TryFrom<i64> + Clone + Send + Sync + 'static> TypedValueParser + for RangedI64ValueParser<T> +where + <T as std::convert::TryFrom<i64>>::Error: Send + Sync + 'static + std::error::Error + ToString, +{ + type Value = T; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + raw_value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + let value = ok!(raw_value.to_str().ok_or_else(|| { + crate::Error::invalid_utf8( + cmd, + crate::output::Usage::new(cmd).create_usage_with_title(&[]), + ) + })); + let value = ok!(value.parse::<i64>().map_err(|err| { + let arg = arg + .map(|a| a.to_string()) + .unwrap_or_else(|| "...".to_owned()); + crate::Error::value_validation( + arg, + raw_value.to_string_lossy().into_owned(), + err.into(), + ) + .with_cmd(cmd) + })); + if !self.bounds.contains(&value) { + let arg = arg + .map(|a| a.to_string()) + .unwrap_or_else(|| "...".to_owned()); + return Err(crate::Error::value_validation( + arg, + raw_value.to_string_lossy().into_owned(), + format!("{} is not in {}", value, self.format_bounds()).into(), + ) + .with_cmd(cmd)); + } + + let value: Result<Self::Value, _> = value.try_into(); + let value = ok!(value.map_err(|err| { + let arg = arg + .map(|a| a.to_string()) + .unwrap_or_else(|| "...".to_owned()); + crate::Error::value_validation( + arg, + raw_value.to_string_lossy().into_owned(), + err.into(), + ) + .with_cmd(cmd) + })); + + Ok(value) + } +} + +impl<T: std::convert::TryFrom<i64> + Clone + Send + Sync, B: RangeBounds<i64>> From<B> + for RangedI64ValueParser<T> +{ + fn from(range: B) -> Self { + Self { + bounds: (range.start_bound().cloned(), range.end_bound().cloned()), + target: Default::default(), + } + } +} + +impl<T: std::convert::TryFrom<i64> + Clone + Send + Sync> Default for RangedI64ValueParser<T> { + fn default() -> Self { + Self::new() + } +} + +/// Parse number that fall within a range of values +/// +/// # Example +/// +/// Usage: +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("port") +/// .long("port") +/// .value_parser(clap::value_parser!(u64).range(3000..)) +/// .action(clap::ArgAction::Set) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "--port", "3001"]).unwrap(); +/// let port: u64 = *m.get_one("port") +/// .expect("required"); +/// assert_eq!(port, 3001); +/// ``` +/// +/// Semantics: +/// ```rust +/// # use std::ffi::OsStr; +/// # use clap::builder::TypedValueParser; +/// # let cmd = clap::Command::new("test"); +/// # let arg = None; +/// let value_parser = clap::builder::RangedU64ValueParser::<u32>::new().range(0..200); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("random")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("-200")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("300")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("-1")).is_err()); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("0")).unwrap(), 0); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("50")).unwrap(), 50); +/// ``` +#[derive(Copy, Clone, Debug)] +pub struct RangedU64ValueParser<T: std::convert::TryFrom<u64> = u64> { + bounds: (std::ops::Bound<u64>, std::ops::Bound<u64>), + target: std::marker::PhantomData<T>, +} + +impl<T: std::convert::TryFrom<u64>> RangedU64ValueParser<T> { + /// Select full range of `u64` + pub fn new() -> Self { + Self::from(..) + } + + /// Narrow the supported range + pub fn range<B: RangeBounds<u64>>(mut self, range: B) -> Self { + // Consideration: when the user does `value_parser!(u8).range()` + // - Avoid programming mistakes by accidentally expanding the range + // - Make it convenient to limit the range like with `..10` + let start = match range.start_bound() { + l @ std::ops::Bound::Included(i) => { + debug_assert!( + self.bounds.contains(i), + "{} must be in {:?}", + i, + self.bounds + ); + l.cloned() + } + l @ std::ops::Bound::Excluded(i) => { + debug_assert!( + self.bounds.contains(&i.saturating_add(1)), + "{} must be in {:?}", + i, + self.bounds + ); + l.cloned() + } + std::ops::Bound::Unbounded => self.bounds.start_bound().cloned(), + }; + let end = match range.end_bound() { + l @ std::ops::Bound::Included(i) => { + debug_assert!( + self.bounds.contains(i), + "{} must be in {:?}", + i, + self.bounds + ); + l.cloned() + } + l @ std::ops::Bound::Excluded(i) => { + debug_assert!( + self.bounds.contains(&i.saturating_sub(1)), + "{} must be in {:?}", + i, + self.bounds + ); + l.cloned() + } + std::ops::Bound::Unbounded => self.bounds.end_bound().cloned(), + }; + self.bounds = (start, end); + self + } + + fn format_bounds(&self) -> String { + let mut result = match self.bounds.0 { + std::ops::Bound::Included(i) => i.to_string(), + std::ops::Bound::Excluded(i) => i.saturating_add(1).to_string(), + std::ops::Bound::Unbounded => u64::MIN.to_string(), + }; + result.push_str(".."); + match self.bounds.1 { + std::ops::Bound::Included(i) => { + result.push('='); + result.push_str(&i.to_string()); + } + std::ops::Bound::Excluded(i) => { + result.push_str(&i.to_string()); + } + std::ops::Bound::Unbounded => { + result.push_str(&u64::MAX.to_string()); + } + } + result + } +} + +impl<T: std::convert::TryFrom<u64> + Clone + Send + Sync + 'static> TypedValueParser + for RangedU64ValueParser<T> +where + <T as std::convert::TryFrom<u64>>::Error: Send + Sync + 'static + std::error::Error + ToString, +{ + type Value = T; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + raw_value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + let value = ok!(raw_value.to_str().ok_or_else(|| { + crate::Error::invalid_utf8( + cmd, + crate::output::Usage::new(cmd).create_usage_with_title(&[]), + ) + })); + let value = ok!(value.parse::<u64>().map_err(|err| { + let arg = arg + .map(|a| a.to_string()) + .unwrap_or_else(|| "...".to_owned()); + crate::Error::value_validation( + arg, + raw_value.to_string_lossy().into_owned(), + err.into(), + ) + .with_cmd(cmd) + })); + if !self.bounds.contains(&value) { + let arg = arg + .map(|a| a.to_string()) + .unwrap_or_else(|| "...".to_owned()); + return Err(crate::Error::value_validation( + arg, + raw_value.to_string_lossy().into_owned(), + format!("{} is not in {}", value, self.format_bounds()).into(), + ) + .with_cmd(cmd)); + } + + let value: Result<Self::Value, _> = value.try_into(); + let value = ok!(value.map_err(|err| { + let arg = arg + .map(|a| a.to_string()) + .unwrap_or_else(|| "...".to_owned()); + crate::Error::value_validation( + arg, + raw_value.to_string_lossy().into_owned(), + err.into(), + ) + .with_cmd(cmd) + })); + + Ok(value) + } +} + +impl<T: std::convert::TryFrom<u64>, B: RangeBounds<u64>> From<B> for RangedU64ValueParser<T> { + fn from(range: B) -> Self { + Self { + bounds: (range.start_bound().cloned(), range.end_bound().cloned()), + target: Default::default(), + } + } +} + +impl<T: std::convert::TryFrom<u64>> Default for RangedU64ValueParser<T> { + fn default() -> Self { + Self::new() + } +} + +/// Implementation for [`ValueParser::bool`] +/// +/// Useful for composing new [`TypedValueParser`]s +#[derive(Copy, Clone, Debug)] +#[non_exhaustive] +pub struct BoolValueParser {} + +impl BoolValueParser { + /// Implementation for [`ValueParser::bool`] + pub fn new() -> Self { + Self {} + } + + fn possible_values() -> impl Iterator<Item = crate::builder::PossibleValue> { + ["true", "false"] + .iter() + .copied() + .map(crate::builder::PossibleValue::new) + } +} + +impl TypedValueParser for BoolValueParser { + type Value = bool; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + let value = if value == std::ffi::OsStr::new("true") { + true + } else if value == std::ffi::OsStr::new("false") { + false + } else { + // Intentionally showing hidden as we hide all of them + let possible_vals = Self::possible_values() + .map(|v| v.get_name().to_owned()) + .collect::<Vec<_>>(); + + return Err(crate::Error::invalid_value( + cmd, + value.to_string_lossy().into_owned(), + &possible_vals, + arg.map(ToString::to_string) + .unwrap_or_else(|| "...".to_owned()), + )); + }; + Ok(value) + } + + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + Some(Box::new(Self::possible_values())) + } +} + +impl Default for BoolValueParser { + fn default() -> Self { + Self::new() + } +} + +/// Parse false-like string values, everything else is `true` +/// +/// See also: +/// - [`ValueParser::bool`] for assuming non-false is true +/// - [`BoolishValueParser`] for different human readable bool representations +/// +/// # Example +/// +/// Usage: +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("append") +/// .value_parser(clap::builder::FalseyValueParser::new()) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "true"]).unwrap(); +/// let port: bool = *m.get_one("append") +/// .expect("required"); +/// assert_eq!(port, true); +/// ``` +/// +/// Semantics: +/// ```rust +/// # use std::ffi::OsStr; +/// # use clap::builder::TypedValueParser; +/// # let cmd = clap::Command::new("test"); +/// # let arg = None; +/// let value_parser = clap::builder::FalseyValueParser::new(); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("random")).unwrap(), true); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("100")).unwrap(), true); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("")).unwrap(), false); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("false")).unwrap(), false); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("No")).unwrap(), false); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("oFF")).unwrap(), false); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("0")).unwrap(), false); +/// ``` +#[derive(Copy, Clone, Debug)] +#[non_exhaustive] +pub struct FalseyValueParser {} + +impl FalseyValueParser { + /// Parse false-like string values, everything else is `true` + pub fn new() -> Self { + Self {} + } + + fn possible_values() -> impl Iterator<Item = crate::builder::PossibleValue> { + crate::util::TRUE_LITERALS + .iter() + .chain(crate::util::FALSE_LITERALS.iter()) + .copied() + .map(|l| crate::builder::PossibleValue::new(l).hide(l != "true" && l != "false")) + } +} + +impl TypedValueParser for FalseyValueParser { + type Value = bool; + + fn parse_ref( + &self, + cmd: &crate::Command, + _arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + let value = ok!(value.to_str().ok_or_else(|| { + crate::Error::invalid_utf8( + cmd, + crate::output::Usage::new(cmd).create_usage_with_title(&[]), + ) + })); + let value = if value.is_empty() { + false + } else { + crate::util::str_to_bool(value).unwrap_or(true) + }; + Ok(value) + } + + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + Some(Box::new(Self::possible_values())) + } +} + +impl Default for FalseyValueParser { + fn default() -> Self { + Self::new() + } +} + +/// Parse bool-like string values, everything else is `true` +/// +/// See also: +/// - [`ValueParser::bool`] for different human readable bool representations +/// - [`FalseyValueParser`] for assuming non-false is true +/// +/// # Example +/// +/// Usage: +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("append") +/// .value_parser(clap::builder::BoolishValueParser::new()) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "true"]).unwrap(); +/// let port: bool = *m.get_one("append") +/// .expect("required"); +/// assert_eq!(port, true); +/// ``` +/// +/// Semantics: +/// ```rust +/// # use std::ffi::OsStr; +/// # use clap::builder::TypedValueParser; +/// # let cmd = clap::Command::new("test"); +/// # let arg = None; +/// let value_parser = clap::builder::BoolishValueParser::new(); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("random")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("")).is_err()); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("100")).is_err()); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("true")).unwrap(), true); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("Yes")).unwrap(), true); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("oN")).unwrap(), true); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("1")).unwrap(), true); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("false")).unwrap(), false); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("No")).unwrap(), false); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("oFF")).unwrap(), false); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("0")).unwrap(), false); +/// ``` +#[derive(Copy, Clone, Debug)] +#[non_exhaustive] +pub struct BoolishValueParser {} + +impl BoolishValueParser { + /// Parse bool-like string values, everything else is `true` + pub fn new() -> Self { + Self {} + } + + fn possible_values() -> impl Iterator<Item = crate::builder::PossibleValue> { + crate::util::TRUE_LITERALS + .iter() + .chain(crate::util::FALSE_LITERALS.iter()) + .copied() + .map(|l| crate::builder::PossibleValue::new(l).hide(l != "true" && l != "false")) + } +} + +impl TypedValueParser for BoolishValueParser { + type Value = bool; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + let value = ok!(value.to_str().ok_or_else(|| { + crate::Error::invalid_utf8( + cmd, + crate::output::Usage::new(cmd).create_usage_with_title(&[]), + ) + })); + let value = ok!(crate::util::str_to_bool(value).ok_or_else(|| { + let arg = arg + .map(|a| a.to_string()) + .unwrap_or_else(|| "...".to_owned()); + crate::Error::value_validation(arg, value.to_owned(), "value was not a boolean".into()) + .with_cmd(cmd) + })); + Ok(value) + } + + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + Some(Box::new(Self::possible_values())) + } +} + +impl Default for BoolishValueParser { + fn default() -> Self { + Self::new() + } +} + +/// Parse non-empty string values +/// +/// See also: +/// - [`ValueParser::string`] +/// +/// # Example +/// +/// Usage: +/// ```rust +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("append") +/// .value_parser(clap::builder::NonEmptyStringValueParser::new()) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "true"]).unwrap(); +/// let port: &String = m.get_one("append") +/// .expect("required"); +/// assert_eq!(port, "true"); +/// ``` +/// +/// Semantics: +/// ```rust +/// # use std::ffi::OsStr; +/// # use clap::builder::TypedValueParser; +/// # let cmd = clap::Command::new("test"); +/// # let arg = None; +/// let value_parser = clap::builder::NonEmptyStringValueParser::new(); +/// assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("random")).unwrap(), "random"); +/// assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("")).is_err()); +/// ``` +#[derive(Copy, Clone, Debug)] +#[non_exhaustive] +pub struct NonEmptyStringValueParser {} + +impl NonEmptyStringValueParser { + /// Parse non-empty string values + pub fn new() -> Self { + Self {} + } +} + +impl TypedValueParser for NonEmptyStringValueParser { + type Value = String; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + if value.is_empty() { + return Err(crate::Error::empty_value( + cmd, + &[], + arg.map(ToString::to_string) + .unwrap_or_else(|| "...".to_owned()), + )); + } + let value = ok!(value.to_str().ok_or_else(|| { + crate::Error::invalid_utf8( + cmd, + crate::output::Usage::new(cmd).create_usage_with_title(&[]), + ) + })); + Ok(value.to_owned()) + } +} + +impl Default for NonEmptyStringValueParser { + fn default() -> Self { + Self::new() + } +} + +/// Adapt a `TypedValueParser` from one value to another +/// +/// See [`TypedValueParser::map`] +#[derive(Clone, Debug)] +pub struct MapValueParser<P, F> { + parser: P, + func: F, +} + +impl<P, F, T> MapValueParser<P, F> +where + P: TypedValueParser, + P::Value: Send + Sync + Clone, + F: Fn(P::Value) -> T + Clone, + T: Send + Sync + Clone, +{ + fn new(parser: P, func: F) -> Self { + Self { parser, func } + } +} + +impl<P, F, T> TypedValueParser for MapValueParser<P, F> +where + P: TypedValueParser, + P::Value: Send + Sync + Clone, + F: Fn(P::Value) -> T + Clone + Send + Sync + 'static, + T: Send + Sync + Clone, +{ + type Value = T; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + let value = ok!(self.parser.parse_ref(cmd, arg, value)); + let value = (self.func)(value); + Ok(value) + } + + fn parse( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: std::ffi::OsString, + ) -> Result<Self::Value, crate::Error> { + let value = ok!(self.parser.parse(cmd, arg, value)); + let value = (self.func)(value); + Ok(value) + } + + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + self.parser.possible_values() + } +} + +/// Adapt a `TypedValueParser` from one value to another +/// +/// See [`TypedValueParser::try_map`] +#[derive(Clone, Debug)] +pub struct TryMapValueParser<P, F> { + parser: P, + func: F, +} + +impl<P, F, T, E> TryMapValueParser<P, F> +where + P: TypedValueParser, + P::Value: Send + Sync + Clone, + F: Fn(P::Value) -> Result<T, E> + Clone + Send + Sync + 'static, + T: Send + Sync + Clone, + E: Into<Box<dyn std::error::Error + Send + Sync + 'static>>, +{ + fn new(parser: P, func: F) -> Self { + Self { parser, func } + } +} + +impl<P, F, T, E> TypedValueParser for TryMapValueParser<P, F> +where + P: TypedValueParser, + P::Value: Send + Sync + Clone, + F: Fn(P::Value) -> Result<T, E> + Clone + Send + Sync + 'static, + T: Send + Sync + Clone, + E: Into<Box<dyn std::error::Error + Send + Sync + 'static>>, +{ + type Value = T; + + fn parse_ref( + &self, + cmd: &crate::Command, + arg: Option<&crate::Arg>, + value: &std::ffi::OsStr, + ) -> Result<Self::Value, crate::Error> { + let mid_value = ok!(self.parser.parse_ref(cmd, arg, value)); + let value = ok!((self.func)(mid_value).map_err(|e| { + let arg = arg + .map(|a| a.to_string()) + .unwrap_or_else(|| "...".to_owned()); + crate::Error::value_validation(arg, value.to_string_lossy().into_owned(), e.into()) + .with_cmd(cmd) + })); + Ok(value) + } + + fn possible_values( + &self, + ) -> Option<Box<dyn Iterator<Item = crate::builder::PossibleValue> + '_>> { + self.parser.possible_values() + } +} + +/// Register a type with [value_parser!][crate::value_parser!] +/// +/// # Example +/// +/// ```rust +/// #[derive(Copy, Clone, Debug)] +/// pub struct Custom(u32); +/// +/// impl clap::builder::ValueParserFactory for Custom { +/// type Parser = CustomValueParser; +/// fn value_parser() -> Self::Parser { +/// CustomValueParser +/// } +/// } +/// +/// #[derive(Clone, Debug)] +/// pub struct CustomValueParser; +/// impl clap::builder::TypedValueParser for CustomValueParser { +/// type Value = Custom; +/// +/// fn parse_ref( +/// &self, +/// cmd: &clap::Command, +/// arg: Option<&clap::Arg>, +/// value: &std::ffi::OsStr, +/// ) -> Result<Self::Value, clap::Error> { +/// let inner = clap::value_parser!(u32); +/// let val = inner.parse_ref(cmd, arg, value)?; +/// Ok(Custom(val)) +/// } +/// } +/// +/// let parser: CustomValueParser = clap::value_parser!(Custom); +/// ``` +pub trait ValueParserFactory { + /// Generated parser, usually [`ValueParser`]. + /// + /// It should at least be a type that supports `Into<ValueParser>`. A non-`ValueParser` type + /// allows the caller to do further initialization on the parser. + type Parser; + + /// Create the specified [`Self::Parser`] + fn value_parser() -> Self::Parser; +} +impl ValueParserFactory for String { + type Parser = ValueParser; + fn value_parser() -> Self::Parser { + ValueParser::string() // Default `clap_derive` to optimized implementation + } +} +impl ValueParserFactory for std::ffi::OsString { + type Parser = ValueParser; + fn value_parser() -> Self::Parser { + ValueParser::os_string() // Default `clap_derive` to optimized implementation + } +} +impl ValueParserFactory for std::path::PathBuf { + type Parser = ValueParser; + fn value_parser() -> Self::Parser { + ValueParser::path_buf() // Default `clap_derive` to optimized implementation + } +} +impl ValueParserFactory for bool { + type Parser = ValueParser; + fn value_parser() -> Self::Parser { + ValueParser::bool() // Default `clap_derive` to optimized implementation + } +} +impl ValueParserFactory for u8 { + type Parser = RangedI64ValueParser<u8>; + fn value_parser() -> Self::Parser { + let start: i64 = u8::MIN.into(); + let end: i64 = u8::MAX.into(); + RangedI64ValueParser::new().range(start..=end) + } +} +impl ValueParserFactory for i8 { + type Parser = RangedI64ValueParser<i8>; + fn value_parser() -> Self::Parser { + let start: i64 = i8::MIN.into(); + let end: i64 = i8::MAX.into(); + RangedI64ValueParser::new().range(start..=end) + } +} +impl ValueParserFactory for u16 { + type Parser = RangedI64ValueParser<u16>; + fn value_parser() -> Self::Parser { + let start: i64 = u16::MIN.into(); + let end: i64 = u16::MAX.into(); + RangedI64ValueParser::new().range(start..=end) + } +} +impl ValueParserFactory for i16 { + type Parser = RangedI64ValueParser<i16>; + fn value_parser() -> Self::Parser { + let start: i64 = i16::MIN.into(); + let end: i64 = i16::MAX.into(); + RangedI64ValueParser::new().range(start..=end) + } +} +impl ValueParserFactory for u32 { + type Parser = RangedI64ValueParser<u32>; + fn value_parser() -> Self::Parser { + let start: i64 = u32::MIN.into(); + let end: i64 = u32::MAX.into(); + RangedI64ValueParser::new().range(start..=end) + } +} +impl ValueParserFactory for i32 { + type Parser = RangedI64ValueParser<i32>; + fn value_parser() -> Self::Parser { + let start: i64 = i32::MIN.into(); + let end: i64 = i32::MAX.into(); + RangedI64ValueParser::new().range(start..=end) + } +} +impl ValueParserFactory for i64 { + type Parser = RangedI64ValueParser<i64>; + fn value_parser() -> Self::Parser { + RangedI64ValueParser::new() + } +} +impl ValueParserFactory for u64 { + type Parser = RangedU64ValueParser<u64>; + fn value_parser() -> Self::Parser { + RangedU64ValueParser::new() + } +} + +#[doc(hidden)] +#[derive(Debug)] +pub struct _AutoValueParser<T>(std::marker::PhantomData<T>); + +impl<T> _AutoValueParser<T> { + #[doc(hidden)] + #[allow(clippy::new_without_default)] + pub fn new() -> Self { + Self(Default::default()) + } +} + +/// Unstable [`ValueParser`] +/// +/// Implementation may change to more specific instance in the future +#[doc(hidden)] +#[derive(Debug)] +pub struct _AnonymousValueParser(ValueParser); + +#[doc(hidden)] +pub mod via_prelude { + use super::*; + + #[doc(hidden)] + pub trait _ValueParserViaFactory: private::_ValueParserViaFactorySealed { + type Parser; + fn value_parser(&self) -> Self::Parser; + } + impl<P: ValueParserFactory> _ValueParserViaFactory for &&&&&&_AutoValueParser<P> { + type Parser = P::Parser; + fn value_parser(&self) -> Self::Parser { + P::value_parser() + } + } + + #[doc(hidden)] + pub trait _ValueParserViaValueEnum: private::_ValueParserViaValueEnumSealed { + type Output; + + fn value_parser(&self) -> Self::Output; + } + impl<E: crate::ValueEnum + Clone + Send + Sync + 'static> _ValueParserViaValueEnum + for &&&&&_AutoValueParser<E> + { + type Output = EnumValueParser<E>; + + fn value_parser(&self) -> Self::Output { + EnumValueParser::<E>::new() + } + } + + #[doc(hidden)] + pub trait _ValueParserViaFromOsString: private::_ValueParserViaFromOsStringSealed { + fn value_parser(&self) -> _AnonymousValueParser; + } + impl<FromOsString> _ValueParserViaFromOsString for &&&&_AutoValueParser<FromOsString> + where + FromOsString: From<std::ffi::OsString> + std::any::Any + Clone + Send + Sync + 'static, + { + fn value_parser(&self) -> _AnonymousValueParser { + _AnonymousValueParser( + OsStringValueParser::new() + .map(|s| FromOsString::from(s)) + .into(), + ) + } + } + + #[doc(hidden)] + pub trait _ValueParserViaFromOsStr: private::_ValueParserViaFromOsStrSealed { + fn value_parser(&self) -> _AnonymousValueParser; + } + impl<FromOsStr> _ValueParserViaFromOsStr for &&&_AutoValueParser<FromOsStr> + where + FromOsStr: + for<'s> From<&'s std::ffi::OsStr> + std::any::Any + Clone + Send + Sync + 'static, + { + fn value_parser(&self) -> _AnonymousValueParser { + _AnonymousValueParser( + OsStringValueParser::new() + .map(|s| FromOsStr::from(&s)) + .into(), + ) + } + } + + #[doc(hidden)] + pub trait _ValueParserViaFromString: private::_ValueParserViaFromStringSealed { + fn value_parser(&self) -> _AnonymousValueParser; + } + impl<FromString> _ValueParserViaFromString for &&_AutoValueParser<FromString> + where + FromString: From<String> + std::any::Any + Clone + Send + Sync + 'static, + { + fn value_parser(&self) -> _AnonymousValueParser { + _AnonymousValueParser(StringValueParser::new().map(|s| FromString::from(s)).into()) + } + } + + #[doc(hidden)] + pub trait _ValueParserViaFromStr: private::_ValueParserViaFromStrSealed { + fn value_parser(&self) -> _AnonymousValueParser; + } + impl<FromStr> _ValueParserViaFromStr for &_AutoValueParser<FromStr> + where + FromStr: for<'s> From<&'s str> + std::any::Any + Clone + Send + Sync + 'static, + { + fn value_parser(&self) -> _AnonymousValueParser { + _AnonymousValueParser(StringValueParser::new().map(|s| FromStr::from(&s)).into()) + } + } + + #[doc(hidden)] + pub trait _ValueParserViaParse: private::_ValueParserViaParseSealed { + fn value_parser(&self) -> _AnonymousValueParser; + } + impl<Parse> _ValueParserViaParse for _AutoValueParser<Parse> + where + Parse: std::str::FromStr + std::any::Any + Clone + Send + Sync + 'static, + <Parse as std::str::FromStr>::Err: Into<Box<dyn std::error::Error + Send + Sync + 'static>>, + { + fn value_parser(&self) -> _AnonymousValueParser { + let func: fn(&str) -> Result<Parse, <Parse as std::str::FromStr>::Err> = + Parse::from_str; + _AnonymousValueParser(ValueParser::new(func)) + } + } +} + +/// Select a [`ValueParser`] implementation from the intended type +/// +/// Supported types +/// - [`ValueParserFactory` types][ValueParserFactory], including +/// - [Native types][ValueParser]: `bool`, `String`, `OsString`, `PathBuf` +/// - [Ranged numeric types][RangedI64ValueParser]: `u8`, `i8`, `u16`, `i16`, `u32`, `i32`, `u64`, `i64` +/// - [`ValueEnum` types][crate::ValueEnum] +/// - [`From<OsString>` types][std::convert::From] and [`From<&OsStr>` types][std::convert::From] +/// - [`From<String>` types][std::convert::From] and [`From<&str>` types][std::convert::From] +/// - [`FromStr` types][std::str::FromStr], including usize, isize +/// +/// # Example +/// +/// Usage: +/// ```rust +/// # use std::path::PathBuf; +/// # use std::path::Path; +/// let mut cmd = clap::Command::new("raw") +/// .arg( +/// clap::Arg::new("output") +/// .value_parser(clap::value_parser!(PathBuf)) +/// .required(true) +/// ); +/// +/// let m = cmd.try_get_matches_from_mut(["cmd", "file.txt"]).unwrap(); +/// let port: &PathBuf = m.get_one("output") +/// .expect("required"); +/// assert_eq!(port, Path::new("file.txt")); +/// ``` +/// +/// Example mappings: +/// ```rust +/// # use clap::ColorChoice; +/// // Built-in types +/// let parser = clap::value_parser!(String); +/// assert_eq!(format!("{:?}", parser), "ValueParser::string"); +/// let parser = clap::value_parser!(std::ffi::OsString); +/// assert_eq!(format!("{:?}", parser), "ValueParser::os_string"); +/// let parser = clap::value_parser!(std::path::PathBuf); +/// assert_eq!(format!("{:?}", parser), "ValueParser::path_buf"); +/// clap::value_parser!(u16).range(3000..); +/// clap::value_parser!(u64).range(3000..); +/// +/// // FromStr types +/// let parser = clap::value_parser!(usize); +/// assert_eq!(format!("{:?}", parser), "_AnonymousValueParser(ValueParser::other(usize))"); +/// +/// // ValueEnum types +/// clap::value_parser!(ColorChoice); +/// ``` +#[macro_export] +macro_rules! value_parser { + ($name:ty) => {{ + use $crate::builder::via_prelude::*; + let auto = $crate::builder::_AutoValueParser::<$name>::new(); + (&&&&&&auto).value_parser() + }}; +} + +mod private { + use super::*; + + // Prefer these so `clap_derive` defaults to optimized implementations + pub trait _ValueParserViaSelfSealed {} + impl<P: Into<ValueParser>> _ValueParserViaSelfSealed for &&&&&&&_AutoValueParser<P> {} + + pub trait _ValueParserViaFactorySealed {} + impl<P: ValueParserFactory> _ValueParserViaFactorySealed for &&&&&&_AutoValueParser<P> {} + + pub trait _ValueParserViaValueEnumSealed {} + impl<E: crate::ValueEnum> _ValueParserViaValueEnumSealed for &&&&&_AutoValueParser<E> {} + + pub trait _ValueParserViaFromOsStringSealed {} + impl<FromOsString> _ValueParserViaFromOsStringSealed for &&&&_AutoValueParser<FromOsString> where + FromOsString: From<std::ffi::OsString> + std::any::Any + Send + Sync + 'static + { + } + + pub trait _ValueParserViaFromOsStrSealed {} + impl<FromOsStr> _ValueParserViaFromOsStrSealed for &&&_AutoValueParser<FromOsStr> where + FromOsStr: for<'s> From<&'s std::ffi::OsStr> + std::any::Any + Send + Sync + 'static + { + } + + pub trait _ValueParserViaFromStringSealed {} + impl<FromString> _ValueParserViaFromStringSealed for &&_AutoValueParser<FromString> where + FromString: From<String> + std::any::Any + Send + Sync + 'static + { + } + + pub trait _ValueParserViaFromStrSealed {} + impl<FromStr> _ValueParserViaFromStrSealed for &_AutoValueParser<FromStr> where + FromStr: for<'s> From<&'s str> + std::any::Any + Send + Sync + 'static + { + } + + pub trait _ValueParserViaParseSealed {} + impl<Parse> _ValueParserViaParseSealed for _AutoValueParser<Parse> + where + Parse: std::str::FromStr + std::any::Any + Send + Sync + 'static, + <Parse as std::str::FromStr>::Err: Into<Box<dyn std::error::Error + Send + Sync + 'static>>, + { + } +} + +#[cfg(test)] +mod test { + use super::*; + + #[test] + fn ensure_typed_applies_to_parse() { + fn parse(_: &str) -> Result<usize, std::io::Error> { + Ok(10) + } + let cmd = crate::Command::new("cmd"); + let arg = None; + assert_eq!( + TypedValueParser::parse_ref(&parse, &cmd, arg, std::ffi::OsStr::new("foo")).unwrap(), + 10 + ); + } +} |