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Diffstat (limited to 'vendor/clap/src/builder/arg.rs')
| -rw-r--r-- | vendor/clap/src/builder/arg.rs | 5494 |
1 files changed, 0 insertions, 5494 deletions
diff --git a/vendor/clap/src/builder/arg.rs b/vendor/clap/src/builder/arg.rs deleted file mode 100644 index e9403d0b7..000000000 --- a/vendor/clap/src/builder/arg.rs +++ /dev/null @@ -1,5494 +0,0 @@ -#![allow(deprecated)] - -// Std -use std::{ - borrow::Cow, - cmp::{Ord, Ordering}, - error::Error, - ffi::OsStr, - fmt::{self, Display, Formatter}, - str, - sync::{Arc, Mutex}, -}; -#[cfg(feature = "env")] -use std::{env, ffi::OsString}; - -#[cfg(feature = "yaml")] -use yaml_rust::Yaml; - -// Internal -use crate::builder::usage_parser::UsageParser; -use crate::builder::ArgPredicate; -use crate::util::{Id, Key}; -use crate::ArgAction; -use crate::PossibleValue; -use crate::ValueHint; -use crate::INTERNAL_ERROR_MSG; -use crate::{ArgFlags, ArgSettings}; - -#[cfg(feature = "regex")] -use crate::builder::RegexRef; - -/// 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}; -/// // Using the traditional builder pattern and setting each option manually -/// let cfg = Arg::new("config") -/// .short('c') -/// .long("config") -/// .takes_value(true) -/// .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"); -/// ``` -#[allow(missing_debug_implementations)] -#[derive(Default, Clone)] -pub struct Arg<'help> { - pub(crate) id: Id, - pub(crate) provider: ArgProvider, - pub(crate) name: &'help str, - pub(crate) help: Option<&'help str>, - pub(crate) long_help: Option<&'help str>, - 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<'help>, Id)>, - pub(crate) r_ifs: Vec<(Id, &'help str)>, - pub(crate) r_ifs_all: Vec<(Id, &'help str)>, - pub(crate) r_unless: Vec<Id>, - pub(crate) r_unless_all: Vec<Id>, - pub(crate) short: Option<char>, - pub(crate) long: Option<&'help str>, - pub(crate) aliases: Vec<(&'help str, bool)>, // (name, visible) - pub(crate) short_aliases: Vec<(char, bool)>, // (name, visible) - pub(crate) disp_ord: DisplayOrder, - pub(crate) possible_vals: Vec<PossibleValue<'help>>, - pub(crate) val_names: Vec<&'help str>, - pub(crate) num_vals: Option<usize>, - pub(crate) max_occurs: Option<usize>, - pub(crate) max_vals: Option<usize>, - pub(crate) min_vals: Option<usize>, - pub(crate) validator: Option<Arc<Mutex<Validator<'help>>>>, - pub(crate) validator_os: Option<Arc<Mutex<ValidatorOs<'help>>>>, - pub(crate) val_delim: Option<char>, - pub(crate) default_vals: Vec<&'help OsStr>, - pub(crate) default_vals_ifs: Vec<(Id, ArgPredicate<'help>, Option<&'help OsStr>)>, - pub(crate) default_missing_vals: Vec<&'help OsStr>, - #[cfg(feature = "env")] - pub(crate) env: Option<(&'help OsStr, Option<OsString>)>, - pub(crate) terminator: Option<&'help str>, - pub(crate) index: Option<usize>, - pub(crate) help_heading: Option<Option<&'help str>>, - pub(crate) value_hint: Option<ValueHint>, -} - -/// # Basic API -impl<'help> Arg<'help> { - /// 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::takes_value(true)`]) - /// 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::takes_value(true)`]: Arg::takes_value() - pub fn new<S: Into<&'help str>>(n: S) -> Self { - Arg::default().name(n) - } - - /// Set the identifier used for referencing this argument in the clap API. - /// - /// See [`Arg::new`] for more details. - #[must_use] - pub fn id<S: Into<&'help str>>(mut self, n: S) -> Self { - let name = n.into(); - self.id = Id::from(&*name); - self.name = name; - self - } - - /// Deprecated, replaced with [`Arg::id`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.0", note = "Replaced with `Arg::id`") - )] - pub fn name<S: Into<&'help str>>(self, n: S) -> Self { - self.id(n) - } - - /// 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 may use the uppercase `V` or lowercase `h` for your own arguments, in - /// which case `clap` simply will not assign those to the auto-generated - /// `version` or `help` arguments. - /// - /// # 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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("config") - /// .short('c') - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog", "-c", "file.toml" - /// ]); - /// - /// assert_eq!(m.get_one::<String>("config").map(String::as_str), Some("file.toml")); - /// ``` - #[inline] - #[must_use] - pub fn short(mut self, s: char) -> Self { - assert!(s != '-', "short option name cannot be `-`"); - - self.short = Some(s); - 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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .long("config") - /// .takes_value(true)) - /// .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: &'help str) -> Self { - #[cfg(feature = "unstable-v4")] - { - self.long = Some(l); - } - #[cfg(not(feature = "unstable-v4"))] - { - self.long = Some(l.trim_start_matches(|c| c == '-')); - } - 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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("test") - /// .long("test") - /// .alias("alias") - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog", "--alias", "cool" - /// ]); - /// assert!(m.contains_id("test")); - /// assert_eq!(m.value_of("test"), Some("cool")); - /// ``` - #[must_use] - pub fn alias<S: Into<&'help str>>(mut self, name: S) -> Self { - self.aliases.push((name.into(), false)); - 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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("test") - /// .short('t') - /// .short_alias('e') - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog", "-e", "cool" - /// ]); - /// assert!(m.contains_id("test")); - /// assert_eq!(m.value_of("test"), Some("cool")); - /// ``` - #[must_use] - pub fn short_alias(mut self, name: char) -> Self { - assert!(name != '-', "short alias name cannot be `-`"); - - self.short_aliases.push((name, false)); - 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_one::<bool>("test").expect("defaulted by clap"), true); - /// ``` - #[must_use] - pub fn aliases(mut self, names: &[&'help str]) -> Self { - self.aliases.extend(names.iter().map(|&x| (x, 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_one::<bool>("test").expect("defaulted by clap"), true); - /// ``` - #[must_use] - pub fn short_aliases(mut self, names: &[char]) -> Self { - for s in names { - 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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("test") - /// .visible_alias("something-awesome") - /// .long("test") - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog", "--something-awesome", "coffee" - /// ]); - /// assert!(m.contains_id("test")); - /// assert_eq!(m.value_of("test"), Some("coffee")); - /// ``` - /// [`Command::alias`]: Arg::alias() - #[must_use] - pub fn visible_alias<S: Into<&'help str>>(mut self, name: S) -> Self { - self.aliases.push((name.into(), true)); - 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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("test") - /// .long("test") - /// .visible_short_alias('t') - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog", "-t", "coffee" - /// ]); - /// assert!(m.contains_id("test")); - /// assert_eq!(m.value_of("test"), Some("coffee")); - /// ``` - #[must_use] - pub fn visible_short_alias(mut self, name: char) -> Self { - assert!(name != '-', "short alias name cannot be `-`"); - - self.short_aliases.push((name, true)); - 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_one::<bool>("test").expect("defaulted by clap"), true); - /// ``` - /// [`Command::aliases`]: Arg::aliases() - #[must_use] - pub fn visible_aliases(mut self, names: &[&'help str]) -> Self { - self.aliases.extend(names.iter().map(|n| (*n, 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_one::<bool>("test").expect("defaulted by clap"), true); - /// ``` - #[must_use] - pub fn visible_short_aliases(mut self, names: &[char]) -> Self { - for n in names { - 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::multiple_values(true)`], only the **last** positional argument - /// may be defined as multiple (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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("mode") - /// .index(1)) - /// .arg(Arg::new("debug") - /// .long("debug")) - /// .get_matches_from(vec![ - /// "prog", "--debug", "fast" - /// ]); - /// - /// assert!(m.contains_id("mode")); - /// assert_eq!(m.value_of("mode"), Some("fast")); // notice index(1) means "first positional" - /// // *not* first argument - /// ``` - /// [`Arg::short`]: Arg::short() - /// [`Arg::long`]: Arg::long() - /// [`Arg::multiple_values(true)`]: Arg::multiple_values() - /// [`panic!`]: https://doc.rust-lang.org/std/macro.panic!.html - /// [`Command`]: crate::Command - #[inline] - #[must_use] - pub fn index(mut self, idx: usize) -> Self { - self.index = Some(idx); - self - } - - /// 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 [`Arg::takes_value`] - /// - /// **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; - /// Arg::new("args") - /// .takes_value(true) - /// .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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("first")) - /// .arg(Arg::new("second")) - /// .arg(Arg::new("third") - /// .takes_value(true) - /// .last(true)) - /// .try_get_matches_from(vec![ - /// "prog", "one", "--", "three" - /// ]); - /// - /// assert!(res.is_ok()); - /// let m = res.unwrap(); - /// assert_eq!(m.value_of("third"), Some("three")); - /// assert!(m.value_of("second").is_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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("first")) - /// .arg(Arg::new("second")) - /// .arg(Arg::new("third") - /// .takes_value(true) - /// .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::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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required(true) - /// .takes_value(true) - /// .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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required(true) - /// .takes_value(true) - /// .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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .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<T: Key>(mut self, arg_id: T) -> Self { - self.requires.push((ArgPredicate::IsPresent, arg_id.into())); - 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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("exclusive") - /// .takes_value(true) - /// .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_one::<bool>("verb").expect("defaulted by clap"), 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) - } - } - - /// Deprecated, replaced with [`Arg::action`] ([Issue #3772](https://github.com/clap-rs/clap/issues/3772)) - #[inline] - #[must_use] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.2.0", note = "Replaced with `Arg::action` (Issue #3772)") - )] - pub fn multiple_occurrences(self, yes: bool) -> Self { - if yes { - self.setting(ArgSettings::MultipleOccurrences) - } else { - self.unset_setting(ArgSettings::MultipleOccurrences) - } - } - - /// Deprecated, for flags this is replaced with `action(ArgAction::Count).value_parser(value_parser!(u8).range(..max))` - #[inline] - #[must_use] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.2.0", - note = "For flags, replaced with `action(ArgAction::Count).value_parser(value_parser!(u8).range(..max))`" - ) - )] - pub fn max_occurrences(mut self, qty: usize) -> Self { - self.max_occurs = Some(qty); - if qty > 1 { - self.multiple_occurrences(true) - } else { - self - } - } - - /// Check if the [`ArgSettings`] variant is currently set on the argument. - /// - /// [`ArgSettings`]: crate::ArgSettings - #[inline] - pub fn is_set(&self, s: ArgSettings) -> bool { - self.settings.is_set(s) - } - - /// Apply a setting to the argument. - /// - /// See [`ArgSettings`] for a full list of possibilities and examples. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Arg, ArgSettings}; - /// Arg::new("config") - /// .setting(ArgSettings::Required) - /// .setting(ArgSettings::TakesValue) - /// # ; - /// ``` - /// - /// ```no_run - /// # use clap::{Arg, ArgSettings}; - /// Arg::new("config") - /// .setting(ArgSettings::Required | ArgSettings::TakesValue) - /// # ; - /// ``` - #[inline] - #[must_use] - pub fn setting<F>(mut self, setting: F) -> Self - where - F: Into<ArgFlags>, - { - self.settings.insert(setting.into()); - self - } - - /// Remove a setting from the argument. - /// - /// See [`ArgSettings`] for a full list of possibilities and examples. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Arg, ArgSettings}; - /// Arg::new("config") - /// .unset_setting(ArgSettings::Required) - /// .unset_setting(ArgSettings::TakesValue) - /// # ; - /// ``` - /// - /// ```no_run - /// # use clap::{Arg, ArgSettings}; - /// Arg::new("config") - /// .unset_setting(ArgSettings::Required | ArgSettings::TakesValue) - /// # ; - /// ``` - #[inline] - #[must_use] - pub fn unset_setting<F>(mut self, setting: F) -> Self - where - F: Into<ArgFlags>, - { - self.settings.remove(setting.into()); - self - } -} - -/// # Value Handling -impl<'help> Arg<'help> { - /// Specifies that the argument takes a value at run time. - /// - /// **NOTE:** values for arguments may be specified 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` - /// - /// **NOTE:** By default, args which allow [multiple values] are delimited by commas, meaning - /// `--option=val1,val2,val3` is three values for the `--option` argument. If you wish to - /// change the delimiter to another character you can use [`Arg::value_delimiter(char)`], - /// alternatively you can turn delimiting values **OFF** by using - /// [`Arg::use_value_delimiter(false)`][Arg::use_value_delimiter] - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("mode") - /// .long("mode") - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog", "--mode", "fast" - /// ]); - /// - /// assert!(m.contains_id("mode")); - /// assert_eq!(m.value_of("mode"), Some("fast")); - /// ``` - /// [`Arg::value_delimiter(char)`]: Arg::value_delimiter() - /// [multiple values]: Arg::multiple_values - #[inline] - #[must_use] - pub fn takes_value(self, yes: bool) -> Self { - if yes { - self.setting(ArgSettings::TakesValue) - } else { - self.unset_setting(ArgSettings::TakesValue) - } - } - - /// Specify the behavior when parsing an argument - /// - /// # 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.occurrences_of("flag"), 0); - /// 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: ArgAction) -> Self { - self.action = Some(action); - self - } - - /// Specify the type of the argument. - /// - /// This allows parsing and validating a value before storing it into - /// [`ArgMatches`][crate::ArgMatches]. - /// - /// See also - /// - [`value_parser!`][crate::value_parser!] for auto-selecting a value parser for a given type - /// - [`BoolishValueParser`][crate::builder::BoolishValueParser], and [`FalseyValueParser`][crate::builder::FalseyValueParser] for alternative `bool` implementations - /// - [`NonEmptyStringValueParser`][crate::builder::NonEmptyStringValueParser] for basic validation for strings - /// - [`RangedI64ValueParser`][crate::builder::RangedI64ValueParser] and [`RangedU64ValueParser`][crate::builder::RangedU64ValueParser] for numeric ranges - /// - [`EnumValueParser`][crate::builder::EnumValueParser] and [`PossibleValuesParser`][crate::builder::PossibleValuesParser] for static enumerated values - /// - or any other [`TypedValueParser`][crate::builder::TypedValueParser] implementation - /// - /// ```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()) - /// .takes_value(true) - /// .required(true) - /// ) - /// .arg( - /// clap::Arg::new("port") - /// .long("port") - /// .value_parser(clap::value_parser!(u16).range(3000..)) - /// .takes_value(true) - /// .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 Into<super::ValueParser>) -> Self { - self.value_parser = Some(parser.into()); - self - } - - /// Specifies that the argument may have an unknown number of values - /// - /// Without any other settings, this argument may appear only *once*. - /// - /// For example, `--opt val1 val2` is allowed, but `--opt val1 val2 --opt val3` is not. - /// - /// **NOTE:** Setting this requires [`Arg::takes_value`]. - /// - /// **WARNING:** - /// - /// Setting `multiple_values` for an argument that takes a value, but with no 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 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 a [value terminator][Arg::value_terminator] is reached - /// - /// Alternatively, [require a delimiter between values][Arg::require_delimiter]. - /// - /// **WARNING:** - /// - /// When using args with `multiple_values` and [`subcommands`], one needs to consider the - /// possibility of an argument value being the same as a valid subcommand. By default `clap` will - /// parse the argument in question as a value *only if* a value is possible at that moment. - /// Otherwise it will be parsed as a subcommand. In effect, this means using `multiple_values` with no - /// additional parameters and a value that coincides with a subcommand name, the subcommand - /// cannot be called unless another argument is passed between them. - /// - /// As an example, consider a CLI with an option `--ui-paths=<paths>...` and subcommand `signer` - /// - /// The following would be parsed as values to `--ui-paths`. - /// - /// ```text - /// $ program --ui-paths path1 path2 signer - /// ``` - /// - /// This is because `--ui-paths` accepts multiple values. `clap` will continue parsing values - /// until another argument is reached and it knows `--ui-paths` is done parsing. - /// - /// By adding additional parameters to `--ui-paths` we can solve this issue. Consider adding - /// [`Arg::number_of_values(1)`] or using *only* [`ArgAction::Append`]. The following are all - /// valid, and `signer` is parsed as a subcommand in the first case, but a value in the second - /// case. - /// - /// ```text - /// $ program --ui-paths path1 signer - /// $ program --ui-paths path1 --ui-paths signer signer - /// ``` - /// - /// # Examples - /// - /// An example with options - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .multiple_values(true) - /// .short('F')) - /// .get_matches_from(vec![ - /// "prog", "-F", "file1", "file2", "file3" - /// ]); - /// - /// assert!(m.contains_id("file")); - /// let files: Vec<_> = m.values_of("file").unwrap().collect(); - /// assert_eq!(files, ["file1", "file2", "file3"]); - /// ``` - /// - /// Although `multiple_values` has been specified, we cannot use the argument more than once. - /// - /// ```rust - /// # use clap::{Command, Arg, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .multiple_values(true) - /// .short('F')) - /// .try_get_matches_from(vec![ - /// "prog", "-F", "file1", "-F", "file2", "-F", "file3" - /// ]); - /// - /// assert!(res.is_err()); - /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnexpectedMultipleUsage) - /// ``` - /// - /// A common mistake is to define an option which allows multiple values, and a positional - /// argument. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .multiple_values(true) - /// .short('F')) - /// .arg(Arg::new("word")) - /// .get_matches_from(vec![ - /// "prog", "-F", "file1", "file2", "file3", "word" - /// ]); - /// - /// assert!(m.contains_id("file")); - /// let files: Vec<_> = m.values_of("file").unwrap().collect(); - /// assert_eq!(files, ["file1", "file2", "file3", "word"]); // wait...what?! - /// assert!(!m.contains_id("word")); // but we clearly used word! - /// ``` - /// - /// The problem is `clap` doesn't know when to stop parsing values for "files". This is further - /// compounded by if we'd said `word -F file1 file2` it would have worked fine, so it would - /// appear to only fail sometimes...not good! - /// - /// 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 is not. - /// - /// ```rust - /// # use clap::{Command, Arg, ArgAction}; - /// let m = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .action(ArgAction::Append) - /// .short('F')) - /// .arg(Arg::new("word")) - /// .get_matches_from(vec![ - /// "prog", "-F", "file1", "-F", "file2", "-F", "file3", "word" - /// ]); - /// - /// assert!(m.contains_id("file")); - /// let files: Vec<_> = m.values_of("file").unwrap().collect(); - /// assert_eq!(files, ["file1", "file2", "file3"]); - /// assert!(m.contains_id("word")); - /// assert_eq!(m.value_of("word"), Some("word")); - /// ``` - /// - /// As a final example, let's fix the above error and get a pretty message to the user :) - /// - /// ```rust - /// # use clap::{Command, Arg, ErrorKind, ArgAction}; - /// let res = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .action(ArgAction::Append) - /// .short('F')) - /// .arg(Arg::new("word")) - /// .try_get_matches_from(vec![ - /// "prog", "-F", "file1", "file2", "file3", "word" - /// ]); - /// - /// assert!(res.is_err()); - /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); - /// ``` - /// - /// [`subcommands`]: crate::Command::subcommand() - /// [`Arg::number_of_values(1)`]: Arg::number_of_values() - /// [maximum number of values]: Arg::max_values() - /// [specific number of values]: Arg::number_of_values() - /// [maximum]: Arg::max_values() - /// [specific]: Arg::number_of_values() - #[inline] - #[must_use] - pub fn multiple_values(self, yes: bool) -> Self { - if yes { - self.setting(ArgSettings::MultipleValues) - } else { - self.unset_setting(ArgSettings::MultipleValues) - } - } - - /// The number of values allowed for this argument. - /// - /// For example, if you had a - /// `-f <file>` argument where you wanted exactly 3 'files' you would set - /// `.number_of_values(3)`, and this argument wouldn't be satisfied unless the user provided - /// 3 and only 3 values. - /// - /// **NOTE:** Does *not* require [`Arg::multiple_occurrences(true)`] to be set. Setting - /// [`Arg::multiple_occurrences(true)`] would allow `-f <file> <file> <file> -f <file> <file> <file>` where - /// as *not* setting it would only allow one occurrence of this argument. - /// - /// **NOTE:** implicitly sets [`Arg::takes_value(true)`] and [`Arg::multiple_values(true)`]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// Arg::new("file") - /// .short('f') - /// .number_of_values(3); - /// ``` - /// - /// Not supplying the correct number of values is an error - /// - /// ```rust - /// # use clap::{Command, Arg, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .number_of_values(2) - /// .short('F')) - /// .try_get_matches_from(vec![ - /// "prog", "-F", "file1" - /// ]); - /// - /// assert!(res.is_err()); - /// assert_eq!(res.unwrap_err().kind(), ErrorKind::WrongNumberOfValues); - /// ``` - /// [`Arg::multiple_occurrences(true)`]: Arg::multiple_occurrences() - #[inline] - #[must_use] - pub fn number_of_values(mut self, qty: usize) -> Self { - self.num_vals = Some(qty); - self.takes_value(true).multiple_values(true) - } - - /// The *maximum* number of values are for this argument. - /// - /// For example, if you had a - /// `-f <file>` argument where you wanted up to 3 'files' you would set `.max_values(3)`, and - /// this argument would be satisfied if the user provided, 1, 2, or 3 values. - /// - /// **NOTE:** This does *not* implicitly set [`Arg::multiple_occurrences(true)`]. This is because - /// `-o val -o val` is multiple occurrences but a single value and `-o val1 val2` is a single - /// occurrence with multiple values. For positional arguments this **does** set - /// [`Arg::multiple_occurrences(true)`] because there is no way to determine the difference between multiple - /// occurrences and multiple values. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// Arg::new("file") - /// .short('f') - /// .max_values(3); - /// ``` - /// - /// Supplying less than the maximum number of values is allowed - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let res = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .max_values(3) - /// .short('F')) - /// .try_get_matches_from(vec![ - /// "prog", "-F", "file1", "file2" - /// ]); - /// - /// assert!(res.is_ok()); - /// let m = res.unwrap(); - /// let files: Vec<_> = m.values_of("file").unwrap().collect(); - /// assert_eq!(files, ["file1", "file2"]); - /// ``` - /// - /// Supplying more than the maximum number of values is an error - /// - /// ```rust - /// # use clap::{Command, Arg, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .max_values(2) - /// .short('F')) - /// .try_get_matches_from(vec![ - /// "prog", "-F", "file1", "file2", "file3" - /// ]); - /// - /// assert!(res.is_err()); - /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); - /// ``` - /// [`Arg::multiple_occurrences(true)`]: Arg::multiple_occurrences() - #[inline] - #[must_use] - pub fn max_values(mut self, qty: usize) -> Self { - self.max_vals = Some(qty); - self.takes_value(true).multiple_values(true) - } - - /// The *minimum* number of values for this argument. - /// - /// For example, if you had a - /// `-f <file>` argument where you wanted at least 2 'files' you would set - /// `.min_values(2)`, and this argument would be satisfied if the user provided, 2 or more - /// values. - /// - /// **NOTE:** This does not implicitly set [`Arg::multiple_occurrences(true)`]. This is because - /// `-o val -o val` is multiple occurrences but a single value and `-o val1 val2` is a single - /// occurrence with multiple values. For positional arguments this **does** set - /// [`Arg::multiple_occurrences(true)`] because there is no way to determine the difference between multiple - /// occurrences and multiple values. - /// - /// **NOTE:** Passing a non-zero value is not the same as specifying [`Arg::required(true)`]. - /// This is due to min and max validation only being performed for present arguments, - /// marking them as required will thus perform validation and a min value of 1 - /// is unnecessary, ignored if not required. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// Arg::new("file") - /// .short('f') - /// .min_values(3); - /// ``` - /// - /// Supplying more than the minimum number of values is allowed - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let res = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .min_values(2) - /// .short('F')) - /// .try_get_matches_from(vec![ - /// "prog", "-F", "file1", "file2", "file3" - /// ]); - /// - /// assert!(res.is_ok()); - /// let m = res.unwrap(); - /// let files: Vec<_> = m.values_of("file").unwrap().collect(); - /// assert_eq!(files, ["file1", "file2", "file3"]); - /// ``` - /// - /// Supplying less than the minimum number of values is an error - /// - /// ```rust - /// # use clap::{Command, Arg, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("file") - /// .takes_value(true) - /// .min_values(2) - /// .short('F')) - /// .try_get_matches_from(vec![ - /// "prog", "-F", "file1" - /// ]); - /// - /// assert!(res.is_err()); - /// assert_eq!(res.unwrap_err().kind(), ErrorKind::TooFewValues); - /// ``` - /// [`Arg::multiple_occurrences(true)`]: Arg::multiple_occurrences() - /// [`Arg::required(true)`]: Arg::required() - #[inline] - #[must_use] - pub fn min_values(mut self, qty: usize) -> Self { - self.min_vals = Some(qty); - self.takes_value(true).multiple_values(true) - } - - /// 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::takes_value(true)`] - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// Arg::new("cfg") - /// .long("config") - /// .value_name("FILE") - /// # ; - /// ``` - /// - /// ```rust - /// # 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 - /// ``` - /// [option]: Arg::takes_value() - /// [positional]: Arg::index() - /// [`Arg::takes_value(true)`]: Arg::takes_value() - #[inline] - #[must_use] - pub fn value_name(self, name: &'help str) -> Self { - self.value_names(&[name]) - } - - /// 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::takes_value(true)`] and [`Arg::multiple_values(true)`]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// Arg::new("speed") - /// .short('s') - /// .value_names(&["fast", "slow"]); - /// ``` - /// - /// ```rust - /// # 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::number_of_values`]: Arg::number_of_values() - /// [`Arg::takes_value(true)`]: Arg::takes_value() - /// [`Arg::multiple_values(true)`]: Arg::multiple_values() - #[must_use] - pub fn value_names(mut self, names: &[&'help str]) -> Self { - self.val_names = names.to_vec(); - self.takes_value(true) - } - - /// Provide the shell a hint about how to complete this argument. - /// - /// See [`ValueHint`][crate::ValueHint] for more information. - /// - /// **NOTE:** implicitly sets [`Arg::takes_value(true)`]. - /// - /// 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}; - /// Command::new("prog") - /// .trailing_var_arg(true) - /// .arg( - /// Arg::new("command") - /// .takes_value(true) - /// .multiple_values(true) - /// .value_hint(ValueHint::CommandWithArguments) - /// ); - /// ``` - #[must_use] - pub fn value_hint(mut self, value_hint: ValueHint) -> Self { - self.value_hint = Some(value_hint); - self.takes_value(true) - } - - /// Deprecated, replaced with [`Arg::value_parser(...)`] - #[inline] - #[must_use] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.2.0", note = "Replaced with `Arg::value_parser(...)`") - )] - pub fn validator<F, O, E>(mut self, mut f: F) -> Self - where - F: FnMut(&str) -> Result<O, E> + Send + 'help, - E: Into<Box<dyn Error + Send + Sync + 'static>>, - { - self.validator = Some(Arc::new(Mutex::new(move |s: &str| { - f(s).map(|_| ()).map_err(|e| e.into()) - }))); - self - } - - /// Deprecated, replaced with [`Arg::value_parser(...)`] - #[must_use] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.2.0", note = "Replaced with `Arg::value_parser(...)`") - )] - pub fn validator_os<F, O, E>(mut self, mut f: F) -> Self - where - F: FnMut(&OsStr) -> Result<O, E> + Send + 'help, - E: Into<Box<dyn Error + Send + Sync + 'static>>, - { - self.validator_os = Some(Arc::new(Mutex::new(move |s: &OsStr| { - f(s).map(|_| ()).map_err(|e| e.into()) - }))); - self - } - - /// Deprecated in [Issue #3743](https://github.com/clap-rs/clap/issues/3743), replaced with [`Arg::value_parser(...)`] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.2.0", - note = "Deprecated in Issue #3743; eplaced with `Arg::value_parser(...)`" - ) - )] - #[cfg(feature = "regex")] - #[must_use] - pub fn validator_regex( - self, - regex: impl Into<RegexRef<'help>>, - err_message: &'help str, - ) -> Self { - let regex = regex.into(); - self.validator(move |s: &str| { - if regex.is_match(s) { - Ok(()) - } else { - Err(err_message) - } - }) - } - - /// Deprecated, replaced with [`Arg::value_parser(PossibleValuesParser::new(...))`] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.2.0", - note = "Replaced with `Arg::value_parser(PossibleValuesParser::new(...)).takes_value(true)`" - ) - )] - #[must_use] - pub fn possible_value<T>(mut self, value: T) -> Self - where - T: Into<PossibleValue<'help>>, - { - self.possible_vals.push(value.into()); - self.takes_value(true) - } - - /// Deprecated, replaced with [`Arg::value_parser(PossibleValuesParser::new(...))`] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.2.0", - note = "Replaced with `Arg::value_parser(PossibleValuesParser::new(...)).takes_value(true)`" - ) - )] - #[must_use] - pub fn possible_values<I, T>(mut self, values: I) -> Self - where - I: IntoIterator<Item = T>, - T: Into<PossibleValue<'help>>, - { - self.possible_vals - .extend(values.into_iter().map(|value| value.into())); - self.takes_value(true) - } - - /// Match values against [`Arg::possible_values`] 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 [`Arg::takes_value`] - /// - /// **NOTE:** To do unicode case folding, enable the `unicode` feature flag. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("pv") - /// .arg(Arg::new("option") - /// .long("option") - /// .takes_value(true) - /// .ignore_case(true) - /// .value_parser(["test123"])) - /// .get_matches_from(vec![ - /// "pv", "--option", "TeSt123", - /// ]); - /// - /// assert!(m.value_of("option").unwrap().eq_ignore_ascii_case("test123")); - /// ``` - /// - /// This setting also works when multiple values can be defined: - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("pv") - /// .arg(Arg::new("option") - /// .short('o') - /// .long("option") - /// .takes_value(true) - /// .ignore_case(true) - /// .multiple_values(true) - /// .value_parser(["test123", "test321"])) - /// .get_matches_from(vec![ - /// "pv", "--option", "TeSt123", "teST123", "tESt321" - /// ]); - /// - /// let matched_vals = m.values_of("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 (`-`) - /// - /// **NOTE:** Setting this requires [`Arg::takes_value`] - /// - /// **WARNING**: Take caution when using this setting combined with - /// [`Arg::multiple_values`], 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. To fix this, consider using - /// [`Arg::multiple_occurrences`] which only allows a single value at a time. - /// - /// **WARNING**: When building your CLIs, consider the effects of allowing leading hyphens and - /// the user passing in a value that matches a valid short. For example, `prog -opt -F` where - /// `-F` is supposed to be a value, yet `-F` is *also* a valid short for another arg. - /// Care should be taken when designing these args. This is compounded by the ability to "stack" - /// short args. I.e. if `-val` is supposed to be a value, but `-v`, `-a`, and `-l` are all valid - /// shorts. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("pat") - /// .takes_value(true) - /// .allow_hyphen_values(true) - /// .long("pattern")) - /// .get_matches_from(vec![ - /// "prog", "--pattern", "-file" - /// ]); - /// - /// assert_eq!(m.value_of("pat"), Some("-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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("pat") - /// .takes_value(true) - /// .long("pattern")) - /// .try_get_matches_from(vec![ - /// "prog", "--pattern", "-file" - /// ]); - /// - /// assert!(res.is_err()); - /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); - /// ``` - /// [`Arg::number_of_values(1)`]: Arg::number_of_values() - #[inline] - #[must_use] - pub fn allow_hyphen_values(self, yes: bool) -> Self { - if yes { - self.setting(ArgSettings::AllowHyphenValues) - } else { - self.unset_setting(ArgSettings::AllowHyphenValues) - } - } - - /// Deprecated, replaced with [`Arg::value_parser(...)`] with either [`ValueParser::os_string()`][crate::builder::ValueParser::os_string] - /// or [`ValueParser::path_buf()`][crate::builder::ValueParser::path_buf] - #[inline] - #[must_use] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.2.0", - note = "Replaced with `Arg::value_parser(...)` with either `ValueParser::os_string()` or `ValueParser::path_buf()`" - ) - )] - pub fn allow_invalid_utf8(self, yes: bool) -> Self { - if yes { - self.setting(ArgSettings::AllowInvalidUtf8) - } else { - self.unset_setting(ArgSettings::AllowInvalidUtf8) - } - } - - /// Deprecated, replaced with [`Arg::value_parser(NonEmptyStringValueParser::new())`] - #[inline] - #[must_use] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.2.0", - note = "Replaced with `Arg::value_parser(NonEmptyStringValueParser::new())`" - ) - )] - pub fn forbid_empty_values(self, yes: bool) -> Self { - if yes { - self.setting(ArgSettings::ForbidEmptyValues) - } else { - self.unset_setting(ArgSettings::ForbidEmptyValues) - } - } - - /// Requires that options use the `--option=val` syntax - /// - /// i.e. an equals between the option and associated value. - /// - /// **NOTE:** Setting this requires [`Arg::takes_value`] - /// - /// # Examples - /// - /// Setting `require_equals` requires that the option have an equals sign between - /// it and the associated value. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .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) - } - } - - /// Specifies that an argument should 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:** When this setting is used, it will default [`Arg::value_delimiter`] - /// to the comma `,`. - /// - /// **NOTE:** Implicitly sets [`Arg::takes_value`] - /// - /// # Examples - /// - /// The following example shows the default behavior. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let delims = Command::new("prog") - /// .arg(Arg::new("option") - /// .long("option") - /// .use_value_delimiter(true) - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog", "--option=val1,val2,val3", - /// ]); - /// - /// assert!(delims.contains_id("option")); - /// assert_eq!(delims.values_of("option").unwrap().collect::<Vec<_>>(), ["val1", "val2", "val3"]); - /// ``` - /// The next example shows the difference when turning delimiters off. This is the default - /// behavior - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let nodelims = Command::new("prog") - /// .arg(Arg::new("option") - /// .long("option") - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog", "--option=val1,val2,val3", - /// ]); - /// - /// assert!(nodelims.contains_id("option")); - /// assert_eq!(nodelims.value_of("option").unwrap(), "val1,val2,val3"); - /// ``` - /// [`Arg::value_delimiter`]: Arg::value_delimiter() - #[inline] - #[must_use] - pub fn use_value_delimiter(mut self, yes: bool) -> Self { - if yes { - if self.val_delim.is_none() { - self.val_delim = Some(','); - } - self.takes_value(true) - .setting(ArgSettings::UseValueDelimiter) - } else { - self.val_delim = None; - self.unset_setting(ArgSettings::UseValueDelimiter) - } - } - - /// Deprecated, replaced with [`Arg::use_value_delimiter`] - #[inline] - #[must_use] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.0", note = "Replaced with `Arg::use_value_delimiter`") - )] - pub fn use_delimiter(self, yes: bool) -> Self { - self.use_value_delimiter(yes) - } - - /// Separator between the arguments values, defaults to `,` (comma). - /// - /// **NOTE:** implicitly sets [`Arg::use_value_delimiter(true)`] - /// - /// **NOTE:** implicitly sets [`Arg::takes_value(true)`] - /// - /// # 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.values_of("config").unwrap().collect::<Vec<_>>(), ["val1", "val2", "val3"]) - /// ``` - /// [`Arg::use_value_delimiter(true)`]: Arg::use_value_delimiter() - /// [`Arg::takes_value(true)`]: Arg::takes_value() - #[inline] - #[must_use] - pub fn value_delimiter(mut self, d: char) -> Self { - self.val_delim = Some(d); - self.takes_value(true).use_value_delimiter(true) - } - - /// Specifies that *multiple values* may only be set using the delimiter. - /// - /// This means if an option is encountered, and no delimiter is found, it is assumed that no - /// additional values for that option follow. This is unlike the default, where it is generally - /// assumed that more values will follow regardless of whether or not a delimiter is used. - /// - /// **NOTE:** The default is `false`. - /// - /// **NOTE:** Setting this requires [`Arg::use_value_delimiter`] and - /// [`Arg::takes_value`] - /// - /// **NOTE:** It's a good idea to inform the user that use of a delimiter is required, either - /// through help text or other means. - /// - /// # Examples - /// - /// These examples demonstrate what happens when `require_delimiter(true)` is used. Notice - /// everything works in this first example, as we use a delimiter, as expected. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let delims = Command::new("prog") - /// .arg(Arg::new("opt") - /// .short('o') - /// .takes_value(true) - /// .use_value_delimiter(true) - /// .require_delimiter(true) - /// .multiple_values(true)) - /// .get_matches_from(vec![ - /// "prog", "-o", "val1,val2,val3", - /// ]); - /// - /// assert!(delims.contains_id("opt")); - /// assert_eq!(delims.values_of("opt").unwrap().collect::<Vec<_>>(), ["val1", "val2", "val3"]); - /// ``` - /// - /// In this next example, we will *not* use a delimiter. Notice it's now an error. - /// - /// ```rust - /// # use clap::{Command, Arg, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("opt") - /// .short('o') - /// .takes_value(true) - /// .use_value_delimiter(true) - /// .require_delimiter(true)) - /// .try_get_matches_from(vec![ - /// "prog", "-o", "val1", "val2", "val3", - /// ]); - /// - /// assert!(res.is_err()); - /// let err = res.unwrap_err(); - /// assert_eq!(err.kind(), ErrorKind::UnknownArgument); - /// ``` - /// - /// What's happening is `-o` is getting `val1`, and because delimiters are required yet none - /// were present, it stops parsing `-o`. At this point it reaches `val2` and because no - /// positional arguments have been defined, it's an error of an unexpected argument. - /// - /// In this final example, we contrast the above with `clap`'s default behavior where the above - /// is *not* an error. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let delims = Command::new("prog") - /// .arg(Arg::new("opt") - /// .short('o') - /// .takes_value(true) - /// .multiple_values(true)) - /// .get_matches_from(vec![ - /// "prog", "-o", "val1", "val2", "val3", - /// ]); - /// - /// assert!(delims.contains_id("opt")); - /// assert_eq!(delims.values_of("opt").unwrap().collect::<Vec<_>>(), ["val1", "val2", "val3"]); - /// ``` - #[inline] - #[must_use] - pub fn require_value_delimiter(self, yes: bool) -> Self { - if yes { - self.setting(ArgSettings::RequireDelimiter) - } else { - self.unset_setting(ArgSettings::RequireDelimiter) - } - } - - /// Deprecated, replaced with [`Arg::require_value_delimiter`] - #[inline] - #[must_use] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.0", note = "Replaced with `Arg::require_value_delimiter`") - )] - pub fn require_delimiter(self, yes: bool) -> Self { - self.require_value_delimiter(yes) - } - - /// Sentinel to **stop** parsing multiple values of a give argument. - /// - /// By default when - /// one sets [`multiple_values(true)`] 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 [`min_values`], [`max_values`] or - /// [`number_of_values`]). - /// - /// **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}; - /// Arg::new("vals") - /// .takes_value(true) - /// .multiple_values(true) - /// .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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("cmds") - /// .takes_value(true) - /// .multiple_values(true) - /// .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.values_of("cmds").unwrap().collect(); - /// assert_eq!(&cmds, &["find", "-type", "f", "-name", "special"]); - /// assert_eq!(m.value_of("location"), Some("/home/clap")); - /// ``` - /// [options]: Arg::takes_value() - /// [positional arguments]: Arg::index() - /// [`multiple_values(true)`]: Arg::multiple_values() - /// [`min_values`]: Arg::min_values() - /// [`number_of_values`]: Arg::number_of_values() - /// [`max_values`]: Arg::max_values() - #[inline] - #[must_use] - pub fn value_terminator(mut self, term: &'help str) -> Self { - self.terminator = Some(term); - self.takes_value(true) - } - - /// 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::takes_value(true)`] [`Arg::multiple_values(true)`], - /// [`Arg::allow_hyphen_values(true)`], and [`Arg::last(true)`] when set to `true`. - /// - /// [`Arg::takes_value(true)`]: Arg::takes_value() - /// [`Arg::multiple_values(true)`]: Arg::multiple_values() - /// [`Arg::allow_hyphen_values(true)`]: Arg::allow_hyphen_values() - /// [`Arg::last(true)`]: Arg::last() - #[inline] - #[must_use] - pub fn raw(self, yes: bool) -> Self { - self.takes_value(yes) - .multiple_values(yes) - .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::occurrences_of`] - /// will return `0` even though the [`ArgMatches::value_of`] will return the default specified. - /// - /// **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::takes_value(true)`]. - /// - /// # Examples - /// - /// First we use the default value without providing any value at runtime. - /// - /// ```rust - /// # use clap::{Command, Arg, ValueSource}; - /// let m = Command::new("prog") - /// .arg(Arg::new("opt") - /// .long("myopt") - /// .default_value("myval")) - /// .get_matches_from(vec![ - /// "prog" - /// ]); - /// - /// assert_eq!(m.value_of("opt"), Some("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, 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.value_of("opt"), Some("non_default")); - /// assert!(m.contains_id("opt")); - /// assert_eq!(m.value_source("opt"), Some(ValueSource::CommandLine)); - /// ``` - /// [`ArgMatches::occurrences_of`]: crate::ArgMatches::occurrences_of() - /// [`ArgMatches::value_of`]: crate::ArgMatches::value_of() - /// [`Arg::takes_value(true)`]: Arg::takes_value() - /// [`ArgMatches::contains_id`]: crate::ArgMatches::contains_id() - /// [`Arg::default_value_if`]: Arg::default_value_if() - #[inline] - #[must_use] - pub fn default_value(self, val: &'help str) -> Self { - self.default_values_os(&[OsStr::new(val)]) - } - - /// Value for the argument when not present. - /// - /// See [`Arg::default_value`]. - /// - /// [`Arg::default_value`]: Arg::default_value() - /// [`OsStr`]: std::ffi::OsStr - #[inline] - #[must_use] - pub fn default_value_os(self, val: &'help OsStr) -> Self { - self.default_values_os(&[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(self, vals: &[&'help str]) -> Self { - let vals_vec: Vec<_> = vals.iter().map(|val| OsStr::new(*val)).collect(); - self.default_values_os(&vals_vec[..]) - } - - /// Value for the argument when not present. - /// - /// See [`Arg::default_values`]. - /// - /// [`Arg::default_values`]: Arg::default_values() - /// [`OsStr`]: std::ffi::OsStr - #[inline] - #[must_use] - pub fn default_values_os(mut self, vals: &[&'help OsStr]) -> Self { - self.default_vals = vals.to_vec(); - self.takes_value(true) - } - - /// 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 `.min_values(0)` and the - /// `.require_equals(true)` 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, ValueSource}; - /// fn cli() -> Command<'static> { - /// Command::new("prog") - /// .arg(Arg::new("color").long("color") - /// .value_name("WHEN") - /// .value_parser(["always", "auto", "never"]) - /// .default_value("auto") - /// .min_values(0) - /// .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.value_of("color"), Some("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.value_of("color"), Some("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.value_of("color"), Some("always")); - /// assert_eq!(m.value_source("color"), Some(ValueSource::CommandLine)); - /// ``` - /// - /// For bool literals: - /// ```rust - /// # use clap::{Command, Arg, ValueSource, value_parser}; - /// fn cli() -> Command<'static> { - /// Command::new("prog") - /// .arg(Arg::new("create").long("create") - /// .value_name("BOOL") - /// .value_parser(value_parser!(bool)) - /// .min_values(0) - /// .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)); - /// ``` - /// - /// [`ArgMatches::value_of`]: ArgMatches::value_of() - /// [`Arg::takes_value(true)`]: Arg::takes_value() - /// [`Arg::default_value`]: Arg::default_value() - #[inline] - #[must_use] - pub fn default_missing_value(self, val: &'help str) -> Self { - self.default_missing_values_os(&[OsStr::new(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() - /// [`OsStr`]: std::ffi::OsStr - #[inline] - #[must_use] - pub fn default_missing_value_os(self, val: &'help 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: &[&'help str]) -> Self { - let vals_vec: Vec<_> = vals.iter().map(|val| OsStr::new(*val)).collect(); - self.default_missing_values_os(&vals_vec[..]) - } - - /// 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: &[&'help OsStr]) -> Self { - self.default_missing_vals = vals.to_vec(); - self.takes_value(true) - } - - /// 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::takes_value(true)`] is not set, the flag is considered raised. - /// - When [`Arg::takes_value(true)`] is set, [`ArgMatches::value_of`] will - /// return value of the environment variable. - /// - /// If user doesn't set the argument in the environment: - /// - When [`Arg::takes_value(true)`] is not set, the flag is considered off. - /// - When [`Arg::takes_value(true)`] is set, [`ArgMatches::value_of`] 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}; - /// - /// env::set_var("MY_FLAG", "env"); - /// - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag") - /// .env("MY_FLAG") - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog" - /// ]); - /// - /// assert_eq!(m.value_of("flag"), Some("env")); - /// ``` - /// - /// In this example, because [`Arg::takes_value(false)`] (by default), - /// `prog` is a flag that accepts an optional, case-insensitive boolean literal. - /// 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}; - /// - /// 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") - /// .env("TRUE_FLAG")) - /// .arg(Arg::new("false_flag") - /// .long("false_flag") - /// .env("FALSE_FLAG")) - /// .arg(Arg::new("absent_flag") - /// .long("absent_flag") - /// .env("ABSENT_FLAG")) - /// .get_matches_from(vec![ - /// "prog" - /// ]); - /// - /// assert!(m.is_present("true_flag")); - /// assert_eq!(m.value_of("true_flag"), None); - /// assert!(!m.is_present("false_flag")); - /// assert!(!m.is_present("absent_flag")); - /// ``` - /// - /// In this example, we show the variable coming from an option on the CLI: - /// - /// ```rust - /// # use std::env; - /// # use clap::{Command, Arg}; - /// - /// env::set_var("MY_FLAG", "env"); - /// - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag") - /// .env("MY_FLAG") - /// .takes_value(true)) - /// .get_matches_from(vec![ - /// "prog", "--flag", "opt" - /// ]); - /// - /// assert_eq!(m.value_of("flag"), Some("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}; - /// - /// env::set_var("MY_FLAG", "env"); - /// - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag") - /// .env("MY_FLAG") - /// .takes_value(true) - /// .default_value("default")) - /// .get_matches_from(vec![ - /// "prog" - /// ]); - /// - /// assert_eq!(m.value_of("flag"), Some("env")); - /// ``` - /// - /// In this example, we show the use of multiple values in a single environment variable: - /// - /// ```rust - /// # use std::env; - /// # use clap::{Command, Arg}; - /// - /// env::set_var("MY_FLAG_MULTI", "env1,env2"); - /// - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag") - /// .env("MY_FLAG_MULTI") - /// .takes_value(true) - /// .multiple_values(true) - /// .use_value_delimiter(true)) - /// .get_matches_from(vec![ - /// "prog" - /// ]); - /// - /// assert_eq!(m.values_of("flag").unwrap().collect::<Vec<_>>(), vec!["env1", "env2"]); - /// ``` - /// [`ArgMatches::value_of`]: crate::ArgMatches::value_of() - /// [`Arg::takes_value(true)`]: Arg::takes_value() - /// [`Arg::use_value_delimiter(true)`]: Arg::use_value_delimiter() - #[cfg(feature = "env")] - #[inline] - #[must_use] - pub fn env(self, name: &'help str) -> Self { - self.env_os(OsStr::new(name)) - } - - /// Read from `name` environment variable when argument is not present. - /// - /// See [`Arg::env`]. - #[cfg(feature = "env")] - #[inline] - #[must_use] - pub fn env_os(mut self, name: &'help OsStr) -> Self { - self.env = Some((name, env::var_os(name))); - self - } -} - -/// # Help -impl<'help> Arg<'help> { - /// 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). - /// - /// ```rust - /// # 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 Into<Option<&'help str>>) -> Self { - self.help = h.into(); - 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). - /// - /// ```rust - /// # 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 Into<Option<&'help str>>) -> Self { - self.long_help = h.into(); - 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 - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// 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') - /// .takes_value(true) - /// .help("Some help and text")) - /// .arg(Arg::new("b") - /// .long("other-option") - /// .short('O') - /// .takes_value(true) - /// .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: usize) -> Self { - self.disp_ord.set_explicit(ord); - self - } - - /// Override the [current] help section. - /// - /// [current]: crate::Command::help_heading - #[inline] - #[must_use] - pub fn help_heading<O>(mut self, heading: O) -> Self - where - O: Into<Option<&'help str>>, - { - self.help_heading = Some(heading.into()); - 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 - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("opt") - /// .long("long-option-flag") - /// .short('o') - /// .takes_value(true) - /// .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 - /// - /// ```rust - /// # 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 [`Arg::takes_value`] - /// - /// To set this for all arguments, see - /// [`Command::hide_possible_values`][crate::Command::hide_possible_values]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("mode") - /// .long("mode") - /// .value_parser(["fast", "slow"]) - /// .takes_value(true) - /// .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 [`Arg::takes_value`] - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("connect") - /// .arg(Arg::new("host") - /// .long("host") - /// .default_value("localhost") - /// .takes_value(true) - /// .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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("mode") - /// .long("mode") - /// .env("MODE") - /// .takes_value(true) - /// .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}; - /// let m = Command::new("connect") - /// .arg(Arg::new("host") - /// .long("host") - /// .env("CONNECT") - /// .takes_value(true) - /// .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 - /// - /// ```rust - /// # 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 - /// - /// ```rust - /// # 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 - /// - /// ```rust - /// # 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 - /// - /// ```rust - /// # 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<'help> Arg<'help> { - /// The name of the [`ArgGroup`] the argument belongs to. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// Arg::new("debug") - /// .long("debug") - /// .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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("debug") - /// .long("debug") - /// .group("mode")) - /// .arg(Arg::new("verbose") - /// .long("verbose") - /// .group("mode")) - /// .get_matches_from(vec![ - /// "prog", "--debug" - /// ]); - /// assert!(m.contains_id("mode")); - /// ``` - /// - /// [`ArgGroup`]: crate::ArgGroup - #[must_use] - pub fn group<T: Key>(mut self, group_id: T) -> Self { - self.groups.push(group_id.into()); - self - } - - /// The names of [`ArgGroup`]'s the argument belongs to. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// Arg::new("debug") - /// .long("debug") - /// .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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("debug") - /// .long("debug") - /// .groups(&["mode", "verbosity"])) - /// .arg(Arg::new("verbose") - /// .long("verbose") - /// .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<T: Key>(mut self, group_ids: &[T]) -> Self { - self.groups.extend(group_ids.iter().map(Id::from)); - self - } - - /// Specifies the value of the argument if `arg` has been used at runtime. - /// - /// If `val` is set to `None`, `arg` only needs to be present. If `val` is set to `"some-val"` - /// then `arg` must be present at runtime **and** have the value `val`. - /// - /// 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::takes_value(true)`]. - /// - /// # Examples - /// - /// First we use the default value only if another arg is present at runtime. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag")) - /// .arg(Arg::new("other") - /// .long("other") - /// .default_value_if("flag", None, Some("default"))) - /// .get_matches_from(vec![ - /// "prog", "--flag" - /// ]); - /// - /// assert_eq!(m.value_of("other"), Some("default")); - /// ``` - /// - /// Next we run the same test, but without providing `--flag`. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag")) - /// .arg(Arg::new("other") - /// .long("other") - /// .default_value_if("flag", None, Some("default"))) - /// .get_matches_from(vec![ - /// "prog" - /// ]); - /// - /// assert_eq!(m.value_of("other"), None); - /// ``` - /// - /// Now lets only use the default value if `--opt` contains the value `special`. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("opt") - /// .takes_value(true) - /// .long("opt")) - /// .arg(Arg::new("other") - /// .long("other") - /// .default_value_if("opt", Some("special"), Some("default"))) - /// .get_matches_from(vec![ - /// "prog", "--opt", "special" - /// ]); - /// - /// assert_eq!(m.value_of("other"), Some("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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("opt") - /// .takes_value(true) - /// .long("opt")) - /// .arg(Arg::new("other") - /// .long("other") - /// .default_value_if("opt", Some("special"), Some("default"))) - /// .get_matches_from(vec![ - /// "prog", "--opt", "hahaha" - /// ]); - /// - /// assert_eq!(m.value_of("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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag")) - /// .arg(Arg::new("other") - /// .long("other") - /// .default_value("default") - /// .default_value_if("flag", None, None)) - /// .get_matches_from(vec![ - /// "prog", "--flag" - /// ]); - /// - /// assert_eq!(m.value_of("other"), None); - /// ``` - /// [`Arg::takes_value(true)`]: Arg::takes_value() - /// [`Arg::default_value`]: Arg::default_value() - #[must_use] - pub fn default_value_if<T: Key>( - self, - arg_id: T, - val: Option<&'help str>, - default: Option<&'help str>, - ) -> Self { - self.default_value_if_os(arg_id, val.map(OsStr::new), default.map(OsStr::new)) - } - - /// Provides a conditional default value in the exact same manner as [`Arg::default_value_if`] - /// only using [`OsStr`]s instead. - /// - /// [`Arg::default_value_if`]: Arg::default_value_if() - /// [`OsStr`]: std::ffi::OsStr - #[must_use] - pub fn default_value_if_os<T: Key>( - mut self, - arg_id: T, - val: Option<&'help OsStr>, - default: Option<&'help OsStr>, - ) -> Self { - self.default_vals_ifs - .push((arg_id.into(), val.into(), default)); - self.takes_value(true) - } - - /// Specifies multiple values and conditions in the same manner as [`Arg::default_value_if`]. - /// - /// The method takes a slice of tuples in the `(arg, Option<val>, 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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag")) - /// .arg(Arg::new("opt") - /// .long("opt") - /// .takes_value(true)) - /// .arg(Arg::new("other") - /// .long("other") - /// .default_value_ifs(&[ - /// ("flag", None, Some("default")), - /// ("opt", Some("channal"), Some("chan")), - /// ])) - /// .get_matches_from(vec![ - /// "prog", "--opt", "channal" - /// ]); - /// - /// assert_eq!(m.value_of("other"), Some("chan")); - /// ``` - /// - /// Next we run the same test, but without providing `--flag`. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag")) - /// .arg(Arg::new("other") - /// .long("other") - /// .default_value_ifs(&[ - /// ("flag", None, Some("default")), - /// ("opt", Some("channal"), Some("chan")), - /// ])) - /// .get_matches_from(vec![ - /// "prog" - /// ]); - /// - /// assert_eq!(m.value_of("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}; - /// let m = Command::new("prog") - /// .arg(Arg::new("flag") - /// .long("flag")) - /// .arg(Arg::new("opt") - /// .long("opt") - /// .takes_value(true)) - /// .arg(Arg::new("other") - /// .long("other") - /// .default_value_ifs(&[ - /// ("flag", None, Some("default")), - /// ("opt", Some("channal"), Some("chan")), - /// ])) - /// .get_matches_from(vec![ - /// "prog", "--opt", "channal", "--flag" - /// ]); - /// - /// assert_eq!(m.value_of("other"), Some("default")); - /// ``` - /// [`Arg::takes_value(true)`]: Arg::takes_value() - /// [`Arg::default_value_if`]: Arg::default_value_if() - #[must_use] - pub fn default_value_ifs<T: Key>( - mut self, - ifs: &[(T, Option<&'help str>, Option<&'help str>)], - ) -> Self { - for (arg, val, default) in ifs { - self = self.default_value_if_os(arg, val.map(OsStr::new), default.map(OsStr::new)); - } - self - } - - /// Provides multiple conditional default values in the exact same manner as - /// [`Arg::default_value_ifs`] only using [`OsStr`]s instead. - /// - /// [`Arg::default_value_ifs`]: Arg::default_value_ifs() - /// [`OsStr`]: std::ffi::OsStr - #[must_use] - pub fn default_value_ifs_os<T: Key>( - mut self, - ifs: &[(T, Option<&'help OsStr>, Option<&'help OsStr>)], - ) -> Self { - for (arg, val, default) in ifs { - self = self.default_value_if_os(arg, *val, *default); - } - self - } - - /// 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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_unless_present("dbg") - /// .takes_value(true) - /// .long("config")) - /// .arg(Arg::new("dbg") - /// .long("debug")) - /// .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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_unless_present("dbg") - /// .takes_value(true) - /// .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<T: Key>(mut self, arg_id: T) -> Self { - self.r_unless.push(arg_id.into()); - 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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_unless_present_all(&["dbg", "infile"]) - /// .takes_value(true) - /// .long("config")) - /// .arg(Arg::new("dbg") - /// .long("debug")) - /// .arg(Arg::new("infile") - /// .short('i') - /// .takes_value(true)) - /// .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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_unless_present_all(&["dbg", "infile"]) - /// .takes_value(true) - /// .long("config")) - /// .arg(Arg::new("dbg") - /// .long("debug")) - /// .arg(Arg::new("infile") - /// .short('i') - /// .takes_value(true)) - /// .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<T, I>(mut self, names: I) -> Self - where - I: IntoIterator<Item = T>, - T: Key, - { - self.r_unless_all.extend(names.into_iter().map(Id::from)); - 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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_unless_present_any(&["dbg", "infile"]) - /// .takes_value(true) - /// .long("config")) - /// .arg(Arg::new("dbg") - /// .long("debug")) - /// .arg(Arg::new("infile") - /// .short('i') - /// .takes_value(true)) - /// .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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_unless_present_any(&["dbg", "infile"]) - /// .takes_value(true) - /// .long("config")) - /// .arg(Arg::new("dbg") - /// .long("debug")) - /// .arg(Arg::new("infile") - /// .short('i') - /// .takes_value(true)) - /// .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<T, I>(mut self, names: I) -> Self - where - I: IntoIterator<Item = T>, - T: Key, - { - self.r_unless.extend(names.into_iter().map(Id::from)); - 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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .required_if_eq("other", "special") - /// .long("config")) - /// .arg(Arg::new("other") - /// .long("other") - /// .takes_value(true)) - /// .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") - /// .takes_value(true) - /// .required_if_eq("other", "special") - /// .long("config")) - /// .arg(Arg::new("other") - /// .long("other") - /// .takes_value(true)) - /// .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") - /// .takes_value(true) - /// .required_if_eq("other", "special") - /// .long("config")) - /// .arg(Arg::new("other") - /// .long("other") - /// .takes_value(true)) - /// .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") - /// .takes_value(true) - /// .required_if_eq("other", "special") - /// .long("config")) - /// .arg(Arg::new("other") - /// .long("other") - /// .ignore_case(true) - /// .takes_value(true)) - /// .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<T: Key>(mut self, arg_id: T, val: &'help str) -> Self { - self.r_ifs.push((arg_id.into(), val)); - 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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_if_eq_any(&[ - /// ("extra", "val"), - /// ("option", "spec") - /// ]) - /// .takes_value(true) - /// .long("config")) - /// .arg(Arg::new("extra") - /// .takes_value(true) - /// .long("extra")) - /// .arg(Arg::new("option") - /// .takes_value(true) - /// .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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_if_eq_any(&[ - /// ("extra", "val"), - /// ("option", "spec") - /// ]) - /// .takes_value(true) - /// .long("config")) - /// .arg(Arg::new("extra") - /// .takes_value(true) - /// .long("extra")) - /// .arg(Arg::new("option") - /// .takes_value(true) - /// .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<T: Key>(mut self, ifs: &[(T, &'help str)]) -> Self { - self.r_ifs - .extend(ifs.iter().map(|(id, val)| (Id::from_ref(id), *val))); - 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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_if_eq_all(&[ - /// ("extra", "val"), - /// ("option", "spec") - /// ]) - /// .takes_value(true) - /// .long("config")) - /// .arg(Arg::new("extra") - /// .takes_value(true) - /// .long("extra")) - /// .arg(Arg::new("option") - /// .takes_value(true) - /// .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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .required_if_eq_all(&[ - /// ("extra", "val"), - /// ("option", "spec") - /// ]) - /// .takes_value(true) - /// .long("config")) - /// .arg(Arg::new("extra") - /// .takes_value(true) - /// .long("extra")) - /// .arg(Arg::new("option") - /// .takes_value(true) - /// .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<T: Key>(mut self, ifs: &[(T, &'help str)]) -> Self { - self.r_ifs_all - .extend(ifs.iter().map(|(id, val)| (Id::from_ref(id), *val))); - self - } - - /// Require another argument if this arg was present at runtime and its value equals to `val`. - /// - /// This method takes `value, another_arg` pair. At runtime, clap will check - /// if this arg (`self`) is present and its value equals to `val`. - /// 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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .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<T: Key>(mut self, val: &'help str, arg_id: T) -> Self { - self.requires - .push((ArgPredicate::Equals(OsStr::new(val)), arg_id.into())); - self - } - - /// Allows multiple conditional requirements. - /// - /// The requirement will only become valid if this arg's value equals `val`. - /// - /// # 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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .requires_ifs(&[ - /// ("special.conf", "opt"), - /// ("other.conf", "other"), - /// ]) - /// .long("config")) - /// .arg(Arg::new("opt") - /// .long("option") - /// .takes_value(true)) - /// .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); - /// ``` - /// [`Arg::requires(name)`]: Arg::requires() - /// [Conflicting]: Arg::conflicts_with() - /// [override]: Arg::overrides_with() - #[must_use] - pub fn requires_ifs<T: Key>(mut self, ifs: &[(&'help str, T)]) -> Self { - self.requires.extend( - ifs.iter() - .map(|(val, arg)| (ArgPredicate::Equals(OsStr::new(*val)), Id::from(arg))), - ); - self - } - - /// Require these arguments names when this one is presen - /// - /// i.e. when using this argument, the following arguments *must* be present. - /// - /// **NOTE:** [Conflicting] rules and [override] rules take precedence over being required - /// by default. - /// - /// # Examples - /// - /// ```rust - /// # use clap::Arg; - /// Arg::new("config") - /// .requires_all(&["input", "output"]) - /// # ; - /// ``` - /// - /// Setting `Arg::requires_all(&[arg, arg2])` requires that all the arguments 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}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .requires("input") - /// .long("config")) - /// .arg(Arg::new("input")) - /// .arg(Arg::new("output")) - /// .try_get_matches_from(vec![ - /// "prog" - /// ]); - /// - /// assert!(res.is_ok()); // We didn't use cfg, so input and output weren't required - /// ``` - /// - /// Setting `Arg::requires_all(&[arg, arg2])` and *not* supplying all the arguments is an - /// error. - /// - /// ```rust - /// # use clap::{Command, Arg, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .requires_all(&["input", "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); - /// ``` - /// [Conflicting]: Arg::conflicts_with() - /// [override]: Arg::overrides_with() - #[must_use] - pub fn requires_all<T: Key>(mut self, names: &[T]) -> Self { - self.requires - .extend(names.iter().map(|s| (ArgPredicate::IsPresent, s.into()))); - self - } - - /// 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. - /// - /// # 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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .conflicts_with("debug") - /// .long("config")) - /// .arg(Arg::new("debug") - /// .long("debug")) - /// .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<T: Key>(mut self, arg_id: T) -> Self { - self.blacklist.push(arg_id.into()); - 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, ErrorKind}; - /// let res = Command::new("prog") - /// .arg(Arg::new("cfg") - /// .takes_value(true) - /// .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: &[&str]) -> Self { - self.blacklist.extend(names.iter().copied().map(Id::from)); - 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`]. - /// - /// **WARNING:** Positional arguments and options which accept - /// [`Arg::multiple_occurrences`] cannot override themselves (or we - /// would never be able to advance to the next positional). If a positional - /// argument or option with one of the [`Arg::multiple_occurrences`] - /// settings lists itself as an override, it is simply ignored. - /// - /// # 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.is_present("color")); - /// assert!(m.is_present("debug")); // even though flag conflicts with debug, it's as if flag - /// // was never used because it was overridden with color - /// assert!(!m.is_present("flag")); - /// ``` - /// Care must be taken when using this setting, and having an arg override with itself. This - /// is common practice when supporting things like shell aliases, config files, etc. - /// However, when combined with multiple values, it can get dicy. - /// Here is how clap handles such situations: - /// - /// When a flag overrides itself, it's as if the flag was only ever used once (essentially - /// preventing a "Unexpected multiple usage" error): - /// - /// ```rust - /// # use clap::{Command, arg}; - /// let m = Command::new("posix") - /// .arg(arg!(--flag "some flag").overrides_with("flag")) - /// .get_matches_from(vec!["posix", "--flag", "--flag"]); - /// assert!(m.is_present("flag")); - /// ``` - /// - /// Making an arg [`Arg::multiple_occurrences`] and override itself - /// is essentially meaningless. Therefore clap ignores an override of self - /// if it's a flag and it already accepts multiple occurrences. - /// - /// ``` - /// # use clap::{Command, arg}; - /// let m = Command::new("posix") - /// .arg(arg!(--flag ... "some flag").overrides_with("flag")) - /// .get_matches_from(vec!["", "--flag", "--flag", "--flag", "--flag"]); - /// assert!(m.is_present("flag")); - /// ``` - /// - /// Now notice with options (which *do not* set - /// [`Arg::multiple_occurrences`]), it's as if only the last - /// occurrence happened. - /// - /// ``` - /// # use clap::{Command, arg}; - /// let m = Command::new("posix") - /// .arg(arg!(--opt <val> "some option").overrides_with("opt")) - /// .get_matches_from(vec!["", "--opt=some", "--opt=other"]); - /// assert!(m.is_present("opt")); - /// assert_eq!(m.value_of("opt"), Some("other")); - /// ``` - /// - /// This will also work when [`Arg::multiple_values`] is enabled: - /// - /// ``` - /// # use clap::{Command, Arg}; - /// let m = Command::new("posix") - /// .arg( - /// Arg::new("opt") - /// .long("opt") - /// .takes_value(true) - /// .multiple_values(true) - /// .overrides_with("opt") - /// ) - /// .get_matches_from(vec!["", "--opt", "1", "2", "--opt", "3", "4", "5"]); - /// assert!(m.is_present("opt")); - /// assert_eq!(m.values_of("opt").unwrap().collect::<Vec<_>>(), &["3", "4", "5"]); - /// ``` - /// - /// Just like flags, options with [`Arg::multiple_occurrences`] set - /// will ignore the "override self" setting. - /// - /// ``` - /// # use clap::{Command, arg}; - /// let m = Command::new("posix") - /// .arg(arg!(--opt <val> ... "some option") - /// .multiple_values(true) - /// .overrides_with("opt")) - /// .get_matches_from(vec!["", "--opt", "first", "over", "--opt", "other", "val"]); - /// assert!(m.is_present("opt")); - /// assert_eq!(m.values_of("opt").unwrap().collect::<Vec<_>>(), &["first", "over", "other", "val"]); - /// ``` - #[must_use] - pub fn overrides_with<T: Key>(mut self, arg_id: T) -> Self { - self.overrides.push(arg_id.into()); - 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.is_present("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.is_present("debug")); - /// assert!(!m.is_present("flag")); - /// ``` - #[must_use] - pub fn overrides_with_all<T: Key>(mut self, names: &[T]) -> Self { - self.overrides.extend(names.iter().map(Id::from)); - self - } -} - -/// # Reflection -impl<'help> Arg<'help> { - /// Get the name of the argument - #[inline] - pub fn get_id(&self) -> &'help str { - self.name - } - - /// Deprecated, replaced with [`Arg::get_id`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.0", note = "Replaced with `Arg::get_id`") - )] - pub fn get_name(&self) -> &'help str { - self.get_id() - } - - /// Get the help specified for this argument, if any - #[inline] - pub fn get_help(&self) -> Option<&'help str> { - self.help - } - - /// 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"), arg.get_long_help()); - /// ``` - /// - #[inline] - pub fn get_long_help(&self) -> Option<&'help str> { - self.long_help - } - - /// Get the help heading specified for this argument, if any - #[inline] - pub fn get_help_heading(&self) -> Option<&'help str> { - self.help_heading.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<&'help str> { - self.long - } - - /// Get visible aliases for this argument, if any - #[inline] - pub fn get_visible_aliases(&self) -> Option<Vec<&'help str>> { - if self.aliases.is_empty() { - None - } else { - Some( - self.aliases - .iter() - .filter_map(|(s, v)| if *v { Some(s) } else { None }) - .copied() - .collect(), - ) - } - } - - /// Get *all* aliases for this argument, if any, both visible and hidden. - #[inline] - pub fn get_all_aliases(&self) -> Option<Vec<&'help str>> { - if self.aliases.is_empty() { - None - } else { - Some(self.aliases.iter().map(|(s, _)| s).copied().collect()) - } - } - - /// Get the long option name and its visible aliases, if any - #[inline] - pub fn get_long_and_visible_aliases(&self) -> Option<Vec<&'help str>> { - let mut longs = match self.long { - Some(long) => vec![long], - None => return None, - }; - if let Some(aliases) = self.get_visible_aliases() { - longs.extend(aliases); - } - Some(longs) - } - - /// Deprecated, replaced with [`Arg::get_value_parser().possible_values()`] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.2.0", - note = "Replaced with `Arg::get_value_parser().possible_values()`" - ) - )] - pub fn get_possible_values(&self) -> Option<&[PossibleValue<'help>]> { - if self.possible_vals.is_empty() { - None - } else { - Some(&self.possible_vals) - } - } - - pub(crate) fn get_possible_values2(&self) -> Vec<PossibleValue<'help>> { - #![allow(deprecated)] - if !self.is_takes_value_set() { - vec![] - } else if let Some(pvs) = self.get_possible_values() { - // Check old first in case the user explicitly set possible values and the derive inferred - // a `ValueParser` with some. - pvs.to_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<&[&'help 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_vals(&self) -> Option<usize> { - self.num_vals - } - - /// Get the delimiter between multiple values - #[inline] - pub fn get_value_delimiter(&self) -> Option<char> { - self.val_delim - } - - /// 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() - } - }) - } - - /// Deprecated, replaced with [`Arg::is_global_set`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.0", note = "Replaced with `Arg::is_global_set`") - )] - pub fn get_global(&self) -> bool { - self.is_global_set() - } - - /// 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!(Some(OsStr::new("ENVIRONMENT")), arg.get_env()); - /// ``` - #[cfg(feature = "env")] - pub fn get_env(&self) -> Option<&OsStr> { - self.env.as_ref().map(|x| x.0) - } - - /// 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!(&["default value"], arg.get_default_values()); - /// ``` - 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!(true, arg.is_positional()); - /// - /// let arg = Arg::new("foo").long("foo"); - /// assert_eq!(false, arg.is_positional()); - /// ``` - pub fn is_positional(&self) -> bool { - self.long.is_none() && self.short.is_none() - } - - /// Reports whether [`Arg::required`] is set - pub fn is_required_set(&self) -> bool { - self.is_set(ArgSettings::Required) - } - - /// Report whether [`Arg::multiple_values`] is set - pub fn is_multiple_values_set(&self) -> bool { - self.is_set(ArgSettings::MultipleValues) - } - - /// [`Arg::multiple_occurrences`] is going away ([Issue #3772](https://github.com/clap-rs/clap/issues/3772)) - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.2.0", note = "`multiple_occurrences` away (Issue #3772)") - )] - pub fn is_multiple_occurrences_set(&self) -> bool { - self.is_set(ArgSettings::MultipleOccurrences) - } - - /// Report whether [`Arg::is_takes_value_set`] is set - pub fn is_takes_value_set(&self) -> bool { - self.is_set(ArgSettings::TakesValue) - } - - /// Report whether [`Arg::allow_hyphen_values`] is set - pub fn is_allow_hyphen_values_set(&self) -> bool { - self.is_set(ArgSettings::AllowHyphenValues) - } - - /// Deprecated, replaced with [`Arg::get_value_parser()`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.2.0", note = "Replaced with `Arg::get_value_parser()`") - )] - pub fn is_forbid_empty_values_set(&self) -> bool { - self.is_set(ArgSettings::ForbidEmptyValues) - } - - /// Deprecated, replaced with [`Arg::get_value_parser()` - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.2.0", note = "Replaced with `Arg::get_value_parser()`") - )] - pub fn is_allow_invalid_utf8_set(&self) -> bool { - self.is_set(ArgSettings::AllowInvalidUtf8) - } - - /// Behavior when parsing the argument - pub fn get_action(&self) -> &super::ArgAction { - const DEFAULT: super::ArgAction = super::ArgAction::StoreValue; - 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 if self.is_allow_invalid_utf8_set() { - static DEFAULT: super::ValueParser = super::ValueParser::os_string(); - &DEFAULT - } 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::use_value_delimiter`] is set - pub fn is_use_value_delimiter_set(&self) -> bool { - self.is_set(ArgSettings::UseValueDelimiter) - } - - /// Report whether [`Arg::require_value_delimiter`] is set - pub fn is_require_value_delimiter_set(&self) -> bool { - self.is_set(ArgSettings::RequireDelimiter) - } - - /// 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) - } - - /// 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) - } -} - -/// # Deprecated -impl<'help> Arg<'help> { - /// Deprecated, replaced with [`Arg::new`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::new`") - )] - #[doc(hidden)] - pub fn with_name<S: Into<&'help str>>(n: S) -> Self { - Self::new(n) - } - - /// Deprecated in [Issue #3087](https://github.com/clap-rs/clap/issues/3087), maybe [`clap::Parser`][crate::Parser] would fit your use case? - #[cfg(feature = "yaml")] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.0.0", - note = "Deprecated in Issue #3087, maybe clap::Parser would fit your use case?" - ) - )] - #[doc(hidden)] - pub fn from_yaml(y: &'help Yaml) -> Self { - #![allow(deprecated)] - let yaml_file_hash = y.as_hash().expect("YAML file must be a hash"); - // We WANT this to panic on error...so expect() is good. - let (name_yaml, yaml) = yaml_file_hash - .iter() - .next() - .expect("There must be one arg in the YAML file"); - let name_str = name_yaml.as_str().expect("Arg name must be a string"); - let mut a = Arg::new(name_str); - - for (k, v) in yaml.as_hash().expect("Arg must be a hash") { - a = match k.as_str().expect("Arg fields must be strings") { - "short" => yaml_to_char!(a, v, short), - "long" => yaml_to_str!(a, v, long), - "aliases" => yaml_vec_or_str!(a, v, alias), - "help" => yaml_to_str!(a, v, help), - "long_help" => yaml_to_str!(a, v, long_help), - "required" => yaml_to_bool!(a, v, required), - "required_if" => yaml_tuple2!(a, v, required_if_eq), - "required_ifs" => yaml_tuple2!(a, v, required_if_eq), - "takes_value" => yaml_to_bool!(a, v, takes_value), - "index" => yaml_to_usize!(a, v, index), - "global" => yaml_to_bool!(a, v, global), - "multiple" => yaml_to_bool!(a, v, multiple), - "hidden" => yaml_to_bool!(a, v, hide), - "next_line_help" => yaml_to_bool!(a, v, next_line_help), - "group" => yaml_to_str!(a, v, group), - "number_of_values" => yaml_to_usize!(a, v, number_of_values), - "max_values" => yaml_to_usize!(a, v, max_values), - "min_values" => yaml_to_usize!(a, v, min_values), - "value_name" => yaml_to_str!(a, v, value_name), - "use_delimiter" => yaml_to_bool!(a, v, use_delimiter), - "allow_hyphen_values" => yaml_to_bool!(a, v, allow_hyphen_values), - "last" => yaml_to_bool!(a, v, last), - "require_delimiter" => yaml_to_bool!(a, v, require_delimiter), - "value_delimiter" => yaml_to_char!(a, v, value_delimiter), - "required_unless" => yaml_to_str!(a, v, required_unless_present), - "display_order" => yaml_to_usize!(a, v, display_order), - "default_value" => yaml_to_str!(a, v, default_value), - "default_value_if" => yaml_tuple3!(a, v, default_value_if), - "default_value_ifs" => yaml_tuple3!(a, v, default_value_if), - #[cfg(feature = "env")] - "env" => yaml_to_str!(a, v, env), - "value_names" => yaml_vec_or_str!(a, v, value_name), - "groups" => yaml_vec_or_str!(a, v, group), - "requires" => yaml_vec_or_str!(a, v, requires), - "requires_if" => yaml_tuple2!(a, v, requires_if), - "requires_ifs" => yaml_tuple2!(a, v, requires_if), - "conflicts_with" => yaml_vec_or_str!(a, v, conflicts_with), - "overrides_with" => yaml_to_str!(a, v, overrides_with), - "possible_values" => yaml_vec_or_str!(a, v, possible_value), - "case_insensitive" => yaml_to_bool!(a, v, ignore_case), - "required_unless_one" => yaml_vec!(a, v, required_unless_present_any), - "required_unless_all" => yaml_vec!(a, v, required_unless_present_all), - s => { - panic!( - "Unknown setting '{}' in YAML file for arg '{}'", - s, name_str - ) - } - } - } - - a - } - - /// Deprecated in [Issue #3086](https://github.com/clap-rs/clap/issues/3086), see [`arg!`][crate::arg!]. - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Deprecated in Issue #3086, see `clap::arg!") - )] - #[doc(hidden)] - pub fn from_usage(u: &'help str) -> Self { - UsageParser::from_usage(u).parse() - } - - /// Deprecated, replaced with [`Arg::required_unless_present`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::required_unless_present`") - )] - #[doc(hidden)] - #[must_use] - pub fn required_unless<T: Key>(self, arg_id: T) -> Self { - self.required_unless_present(arg_id) - } - - /// Deprecated, replaced with [`Arg::required_unless_present_all`] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.0.0", - note = "Replaced with `Arg::required_unless_present_all`" - ) - )] - #[doc(hidden)] - #[must_use] - pub fn required_unless_all<T, I>(self, names: I) -> Self - where - I: IntoIterator<Item = T>, - T: Key, - { - self.required_unless_present_all(names) - } - - /// Deprecated, replaced with [`Arg::required_unless_present_any`] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.0.0", - note = "Replaced with `Arg::required_unless_present_any`" - ) - )] - #[doc(hidden)] - #[must_use] - pub fn required_unless_one<T, I>(self, names: I) -> Self - where - I: IntoIterator<Item = T>, - T: Key, - { - self.required_unless_present_any(names) - } - - /// Deprecated, replaced with [`Arg::required_if_eq`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::required_if_eq`") - )] - #[doc(hidden)] - #[must_use] - pub fn required_if<T: Key>(self, arg_id: T, val: &'help str) -> Self { - self.required_if_eq(arg_id, val) - } - - /// Deprecated, replaced with [`Arg::required_if_eq_any`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::required_if_eq_any`") - )] - #[doc(hidden)] - #[must_use] - pub fn required_ifs<T: Key>(self, ifs: &[(T, &'help str)]) -> Self { - self.required_if_eq_any(ifs) - } - - /// Deprecated, replaced with [`Arg::hide`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::hide`") - )] - #[doc(hidden)] - #[inline] - #[must_use] - pub fn hidden(self, yes: bool) -> Self { - self.hide(yes) - } - - /// Deprecated, replaced with [`Arg::ignore_case`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::ignore_case`") - )] - #[doc(hidden)] - #[inline] - #[must_use] - pub fn case_insensitive(self, yes: bool) -> Self { - self.ignore_case(yes) - } - - /// Deprecated, replaced with [`Arg::forbid_empty_values`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::forbid_empty_values`") - )] - #[doc(hidden)] - #[must_use] - pub fn empty_values(self, yes: bool) -> Self { - self.forbid_empty_values(!yes) - } - - /// Deprecated, replaced with [`Arg::multiple_occurrences`] (most likely what you want) and - /// [`Arg::multiple_values`] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.0.0", - note = "Split into `Arg::multiple_occurrences` (most likely what you want) and `Arg::multiple_values`" - ) - )] - #[doc(hidden)] - #[must_use] - pub fn multiple(self, yes: bool) -> Self { - self.multiple_occurrences(yes).multiple_values(yes) - } - - /// Deprecated, replaced with [`Arg::hide_short_help`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::hide_short_help`") - )] - #[doc(hidden)] - #[inline] - #[must_use] - pub fn hidden_short_help(self, yes: bool) -> Self { - self.hide_short_help(yes) - } - - /// Deprecated, replaced with [`Arg::hide_long_help`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::hide_long_help`") - )] - #[doc(hidden)] - #[inline] - #[must_use] - pub fn hidden_long_help(self, yes: bool) -> Self { - self.hide_long_help(yes) - } - - /// Deprecated, replaced with [`Arg::setting`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::setting`") - )] - #[doc(hidden)] - #[must_use] - pub fn set(self, s: ArgSettings) -> Self { - self.setting(s) - } - - /// Deprecated, replaced with [`Arg::unset_setting`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `Arg::unset_setting`") - )] - #[doc(hidden)] - #[must_use] - pub fn unset(self, s: ArgSettings) -> Self { - self.unset_setting(s) - } -} - -/// # Internally used only -impl<'help> Arg<'help> { - pub(crate) fn _build(&mut self) { - if self.is_positional() { - self.settings.set(ArgSettings::TakesValue); - } - 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]; - } - } - if action.takes_values() { - self.settings.set(ArgSettings::TakesValue); - } else { - self.settings.unset(ArgSettings::TakesValue); - } - match action { - ArgAction::StoreValue - | ArgAction::IncOccurrence - | ArgAction::Help - | ArgAction::Version => {} - ArgAction::Set - | ArgAction::Append - | ArgAction::SetTrue - | ArgAction::SetFalse - | ArgAction::Count => { - if !self.is_positional() { - self.settings.set(ArgSettings::MultipleOccurrences); - } - } - } - } - - 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 if self.is_allow_invalid_utf8_set() { - self.value_parser = Some(super::ValueParser::os_string()); - } else { - self.value_parser = Some(super::ValueParser::string()); - } - } - - if (self.is_use_value_delimiter_set() || self.is_require_value_delimiter_set()) - && self.val_delim.is_none() - { - self.val_delim = Some(','); - } - - let val_names_len = self.val_names.len(); - - if val_names_len > 1 { - self.settings.set(ArgSettings::MultipleValues); - - if self.num_vals.is_none() { - self.num_vals = Some(val_names_len); - } - } - - let self_id = self.id.clone(); - if self.is_positional() || self.is_multiple_occurrences_set() { - // Remove self-overrides where they don't make sense. - // - // We can evaluate switching this to a debug assert at a later time (though it will - // require changing propagation of `AllArgsOverrideSelf`). Being conservative for now - // due to where we are at in the release. - self.overrides.retain(|e| *e != self_id); - } - } - - pub(crate) fn generated(mut self) -> Self { - self.provider = ArgProvider::Generated; - self - } - - pub(crate) fn longest_filter(&self) -> bool { - self.is_takes_value_set() || self.long.is_some() || self.short.is_none() - } - - // Used for positionals when printing - pub(crate) fn multiple_str(&self) -> &str { - let mult_vals = self.val_names.len() > 1; - if (self.is_multiple_values_set() || self.is_multiple_occurrences_set()) && !mult_vals { - "..." - } else { - "" - } - } - - // Used for positionals when printing - pub(crate) fn name_no_brackets(&self) -> Cow<str> { - debug!("Arg::name_no_brackets:{}", self.name); - let delim = if self.is_require_value_delimiter_set() { - self.val_delim.expect(INTERNAL_ERROR_MSG) - } else { - ' ' - } - .to_string(); - if !self.val_names.is_empty() { - debug!("Arg::name_no_brackets: val_names={:#?}", self.val_names); - - if self.val_names.len() > 1 { - Cow::Owned( - self.val_names - .iter() - .map(|n| format!("<{}>", n)) - .collect::<Vec<_>>() - .join(&*delim), - ) - } else { - Cow::Borrowed(self.val_names.get(0).expect(INTERNAL_ERROR_MSG)) - } - } else { - debug!("Arg::name_no_brackets: just name"); - Cow::Borrowed(self.name) - } - } - - /// Either multiple values or occurrences - pub(crate) fn is_multiple(&self) -> bool { - self.is_multiple_values_set() | self.is_multiple_occurrences_set() - } - - pub(crate) fn get_display_order(&self) -> usize { - self.disp_ord.get_explicit() - } -} - -impl<'help> From<&'_ Arg<'help>> for Arg<'help> { - fn from(a: &Arg<'help>) -> Self { - a.clone() - } -} - -impl<'help> PartialEq for Arg<'help> { - fn eq(&self, other: &Arg<'help>) -> bool { - self.name == other.name - } -} - -impl<'help> PartialOrd for Arg<'help> { - fn partial_cmp(&self, other: &Self) -> Option<Ordering> { - Some(self.cmp(other)) - } -} - -impl<'help> Ord for Arg<'help> { - fn cmp(&self, other: &Arg) -> Ordering { - self.name.cmp(other.name) - } -} - -impl<'help> Eq for Arg<'help> {} - -impl<'help> Display for Arg<'help> { - fn fmt(&self, f: &mut Formatter) -> fmt::Result { - // Write the name such --long or -l - if let Some(l) = self.long { - write!(f, "--{}", l)?; - } else if let Some(s) = self.short { - write!(f, "-{}", s)?; - } - let mut need_closing_bracket = false; - if !self.is_positional() && self.is_takes_value_set() { - let is_optional_val = self.min_vals == Some(0); - let sep = if self.is_require_equals_set() { - if is_optional_val { - need_closing_bracket = true; - "[=" - } else { - "=" - } - } else if is_optional_val { - need_closing_bracket = true; - " [" - } else { - " " - }; - f.write_str(sep)?; - } - if self.is_takes_value_set() || self.is_positional() { - display_arg_val(self, |s, _| f.write_str(s))?; - } - if need_closing_bracket { - f.write_str("]")?; - } - - Ok(()) - } -} - -impl<'help> fmt::Debug for Arg<'help> { - 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("provider", &self.provider) - .field("name", &self.name) - .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("possible_vals", &self.possible_vals) - .field("val_names", &self.val_names) - .field("num_vals", &self.num_vals) - .field("max_vals", &self.max_vals) - .field("min_vals", &self.min_vals) - .field( - "validator", - &self.validator.as_ref().map_or("None", |_| "Some(FnMut)"), - ) - .field( - "validator_os", - &self.validator_os.as_ref().map_or("None", |_| "Some(FnMut)"), - ) - .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() - } -} - -type Validator<'a> = dyn FnMut(&str) -> Result<(), Box<dyn Error + Send + Sync>> + Send + 'a; -type ValidatorOs<'a> = dyn FnMut(&OsStr) -> Result<(), Box<dyn Error + Send + Sync>> + Send + 'a; - -#[derive(Debug, Clone, Eq, PartialEq)] -pub(crate) enum ArgProvider { - Generated, - GeneratedMutated, - User, -} - -impl Default for ArgProvider { - fn default() -> Self { - ArgProvider::User - } -} - -/// Write the values such as <name1> <name2> -pub(crate) fn display_arg_val<F, T, E>(arg: &Arg, mut write: F) -> Result<(), E> -where - F: FnMut(&str, bool) -> Result<T, E>, -{ - let mult_val = arg.is_multiple_values_set(); - let mult_occ = arg.is_multiple_occurrences_set(); - let delim = if arg.is_require_value_delimiter_set() { - arg.val_delim.expect(INTERNAL_ERROR_MSG) - } else { - ' ' - } - .to_string(); - if !arg.val_names.is_empty() { - // If have val_name. - match (arg.val_names.len(), arg.num_vals) { - (1, Some(num_vals)) => { - // If single value name with multiple num_of_vals, display all - // the values with the single value name. - let arg_name = format!("<{}>", arg.val_names.get(0).unwrap()); - for n in 1..=num_vals { - write(&arg_name, true)?; - if n != num_vals { - write(&delim, false)?; - } - } - } - (num_val_names, _) => { - // If multiple value names, display them sequentially(ignore num of vals). - let mut it = arg.val_names.iter().peekable(); - while let Some(val) = it.next() { - write(&format!("<{}>", val), true)?; - if it.peek().is_some() { - write(&delim, false)?; - } - } - if (num_val_names == 1 && mult_val) - || (arg.is_positional() && mult_occ) - || num_val_names < arg.num_vals.unwrap_or(0) - { - write("...", true)?; - } - } - } - } else if let Some(num_vals) = arg.num_vals { - // If number_of_values is specified, display the value multiple times. - let arg_name = format!("<{}>", arg.name); - for n in 1..=num_vals { - write(&arg_name, true)?; - if n != num_vals { - write(&delim, false)?; - } - } - } else if arg.is_positional() { - // Value of positional argument with no num_vals and val_names. - write(&format!("<{}>", arg.name), true)?; - - if mult_val || mult_occ { - write("...", true)?; - } - } else { - // value of flag argument with no num_vals and val_names. - write(&format!("<{}>", arg.name), true)?; - if mult_val { - write("...", true)?; - } - } - Ok(()) -} - -#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)] -pub(crate) enum DisplayOrder { - None, - Implicit(usize), - Explicit(usize), -} - -impl DisplayOrder { - pub(crate) fn set_explicit(&mut self, explicit: usize) { - *self = Self::Explicit(explicit) - } - - pub(crate) fn set_implicit(&mut self, implicit: usize) { - *self = (*self).max(Self::Implicit(implicit)) - } - - pub(crate) fn make_explicit(&mut self) { - match *self { - Self::None | Self::Explicit(_) => {} - Self::Implicit(disp) => self.set_explicit(disp), - } - } - - pub(crate) fn get_explicit(self) -> usize { - match self { - Self::None | Self::Implicit(_) => 999, - Self::Explicit(disp) => disp, - } - } -} - -impl Default for DisplayOrder { - fn default() -> Self { - Self::None - } -} - -// Flags -#[cfg(test)] -mod test { - use super::Arg; - - #[test] - fn flag_display() { - let mut f = Arg::new("flg").multiple_occurrences(true); - f.long = Some("flag"); - - assert_eq!(f.to_string(), "--flag"); - - let mut f2 = Arg::new("flg"); - f2.short = Some('f'); - - assert_eq!(f2.to_string(), "-f"); - } - - #[test] - fn flag_display_single_alias() { - let mut f = Arg::new("flg"); - f.long = Some("flag"); - f.aliases = vec![("als", true)]; - - assert_eq!(f.to_string(), "--flag") - } - - #[test] - fn flag_display_multiple_aliases() { - let mut f = Arg::new("flg"); - f.short = Some('f'); - f.aliases = vec![ - ("alias_not_visible", false), - ("f2", true), - ("f3", true), - ("f4", true), - ]; - assert_eq!(f.to_string(), "-f"); - } - - #[test] - fn flag_display_single_short_alias() { - let mut f = Arg::new("flg"); - f.short = Some('a'); - f.short_aliases = vec![('b', true)]; - - assert_eq!(f.to_string(), "-a") - } - - #[test] - fn flag_display_multiple_short_aliases() { - let mut f = Arg::new("flg"); - f.short = Some('a'); - f.short_aliases = vec![('b', false), ('c', true), ('d', true), ('e', true)]; - assert_eq!(f.to_string(), "-a"); - } - - // Options - - #[test] - fn option_display_multiple_occurrences() { - let o = Arg::new("opt") - .long("option") - .takes_value(true) - .multiple_occurrences(true); - - assert_eq!(o.to_string(), "--option <opt>"); - } - - #[test] - fn option_display_multiple_values() { - let o = Arg::new("opt") - .long("option") - .takes_value(true) - .multiple_values(true); - - assert_eq!(o.to_string(), "--option <opt>..."); - } - - #[test] - fn option_display2() { - let o2 = Arg::new("opt").short('o').value_names(&["file", "name"]); - - assert_eq!(o2.to_string(), "-o <file> <name>"); - } - - #[test] - fn option_display3() { - let o2 = Arg::new("opt") - .short('o') - .takes_value(true) - .multiple_values(true) - .value_names(&["file", "name"]); - - assert_eq!(o2.to_string(), "-o <file> <name>"); - } - - #[test] - fn option_display_single_alias() { - let o = Arg::new("opt") - .takes_value(true) - .long("option") - .visible_alias("als"); - - assert_eq!(o.to_string(), "--option <opt>"); - } - - #[test] - fn option_display_multiple_aliases() { - let o = Arg::new("opt") - .long("option") - .takes_value(true) - .visible_aliases(&["als2", "als3", "als4"]) - .alias("als_not_visible"); - - assert_eq!(o.to_string(), "--option <opt>"); - } - - #[test] - fn option_display_single_short_alias() { - let o = Arg::new("opt") - .takes_value(true) - .short('a') - .visible_short_alias('b'); - - assert_eq!(o.to_string(), "-a <opt>"); - } - - #[test] - fn option_display_multiple_short_aliases() { - let o = Arg::new("opt") - .short('a') - .takes_value(true) - .visible_short_aliases(&['b', 'c', 'd']) - .short_alias('e'); - - assert_eq!(o.to_string(), "-a <opt>"); - } - - // Positionals - - #[test] - fn positional_display_multiple_values() { - let p = Arg::new("pos") - .index(1) - .takes_value(true) - .multiple_values(true); - - assert_eq!(p.to_string(), "<pos>..."); - } - - #[test] - fn positional_display_multiple_occurrences() { - let p = Arg::new("pos") - .index(1) - .takes_value(true) - .multiple_occurrences(true); - - assert_eq!(p.to_string(), "<pos>..."); - } - - #[test] - fn positional_display_required() { - let p2 = Arg::new("pos").index(1).required(true); - - assert_eq!(p2.to_string(), "<pos>"); - } - - #[test] - fn positional_display_val_names() { - let p2 = Arg::new("pos").index(1).value_names(&["file1", "file2"]); - - assert_eq!(p2.to_string(), "<file1> <file2>"); - } - - #[test] - fn positional_display_val_names_req() { - let p2 = Arg::new("pos") - .index(1) - .required(true) - .value_names(&["file1", "file2"]); - - assert_eq!(p2.to_string(), "<file1> <file2>"); - } -} |