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Diffstat (limited to 'vendor/clap/src/builder/command.rs')
| -rw-r--r-- | vendor/clap/src/builder/command.rs | 5189 |
1 files changed, 0 insertions, 5189 deletions
diff --git a/vendor/clap/src/builder/command.rs b/vendor/clap/src/builder/command.rs deleted file mode 100644 index de59ad8cd..000000000 --- a/vendor/clap/src/builder/command.rs +++ /dev/null @@ -1,5189 +0,0 @@ -#![allow(deprecated)] - -// Std -use std::collections::HashMap; -use std::env; -use std::ffi::OsString; -use std::fmt; -use std::io; -use std::ops::Index; -use std::path::Path; - -// Third Party -#[cfg(feature = "yaml")] -use yaml_rust::Yaml; - -// Internal -use crate::builder::app_settings::{AppFlags, AppSettings}; -use crate::builder::arg_settings::ArgSettings; -use crate::builder::{arg::ArgProvider, Arg, ArgGroup, ArgPredicate}; -use crate::error::ErrorKind; -use crate::error::Result as ClapResult; -use crate::mkeymap::MKeyMap; -use crate::output::fmt::Stream; -use crate::output::{fmt::Colorizer, Help, HelpWriter, Usage}; -use crate::parser::{ArgMatcher, ArgMatches, Parser}; -use crate::util::ChildGraph; -use crate::util::{color::ColorChoice, Id, Key}; -use crate::PossibleValue; -use crate::{Error, INTERNAL_ERROR_MSG}; - -#[cfg(debug_assertions)] -use crate::builder::debug_asserts::assert_app; - -/// Build a command-line interface. -/// -/// This includes defining arguments, subcommands, parser behavior, and help output. -/// Once all configuration is complete, -/// the [`Command::get_matches`] family of methods starts the runtime-parsing -/// process. These methods then return information about the user supplied -/// arguments (or lack thereof). -/// -/// When deriving a [`Parser`][crate::Parser], you can use -/// [`CommandFactory::command`][crate::CommandFactory::command] to access the -/// `Command`. -/// -/// - [Basic API][crate::App#basic-api] -/// - [Application-wide Settings][crate::App#application-wide-settings] -/// - [Command-specific Settings][crate::App#command-specific-settings] -/// - [Subcommand-specific Settings][crate::App#subcommand-specific-settings] -/// - [Reflection][crate::App#reflection] -/// -/// # Examples -/// -/// ```no_run -/// # use clap::{Command, Arg}; -/// let m = Command::new("My Program") -/// .author("Me, me@mail.com") -/// .version("1.0.2") -/// .about("Explains in brief what the program does") -/// .arg( -/// Arg::new("in_file") -/// ) -/// .after_help("Longer explanation to appear after the options when \ -/// displaying the help information from --help or -h") -/// .get_matches(); -/// -/// // Your program logic starts here... -/// ``` -/// [`App::get_matches`]: Command::get_matches() -pub type Command<'help> = App<'help>; - -/// Deprecated, replaced with [`Command`] -#[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.0", note = "Replaced with `Command`") -)] -#[derive(Debug, Clone, PartialEq, Eq)] -pub struct App<'help> { - id: Id, - name: String, - long_flag: Option<&'help str>, - short_flag: Option<char>, - display_name: Option<String>, - bin_name: Option<String>, - author: Option<&'help str>, - version: Option<&'help str>, - long_version: Option<&'help str>, - about: Option<&'help str>, - long_about: Option<&'help str>, - before_help: Option<&'help str>, - before_long_help: Option<&'help str>, - after_help: Option<&'help str>, - after_long_help: Option<&'help str>, - aliases: Vec<(&'help str, bool)>, // (name, visible) - short_flag_aliases: Vec<(char, bool)>, // (name, visible) - long_flag_aliases: Vec<(&'help str, bool)>, // (name, visible) - usage_str: Option<&'help str>, - usage_name: Option<String>, - help_str: Option<&'help str>, - disp_ord: Option<usize>, - term_w: Option<usize>, - max_w: Option<usize>, - template: Option<&'help str>, - settings: AppFlags, - g_settings: AppFlags, - args: MKeyMap<'help>, - subcommands: Vec<App<'help>>, - replacers: HashMap<&'help str, &'help [&'help str]>, - groups: Vec<ArgGroup<'help>>, - current_help_heading: Option<&'help str>, - current_disp_ord: Option<usize>, - subcommand_value_name: Option<&'help str>, - subcommand_heading: Option<&'help str>, -} - -/// # Basic API -impl<'help> App<'help> { - /// Creates a new instance of an `Command`. - /// - /// It is common, but not required, to use binary name as the `name`. This - /// name will only be displayed to the user when they request to print - /// version or help and usage information. - /// - /// See also [`command!`](crate::command!) and [`crate_name!`](crate::crate_name!). - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("My Program") - /// # ; - /// ``` - pub fn new<S: Into<String>>(name: S) -> Self { - /// The actual implementation of `new`, non-generic to save code size. - /// - /// If we don't do this rustc will unnecessarily generate multiple versions - /// of this code. - fn new_inner<'help>(name: String) -> App<'help> { - App { - id: Id::from(&*name), - name, - ..Default::default() - } - .arg( - Arg::new("help") - .long("help") - .help("Print help information") - .global(true) - .generated(), - ) - .arg( - Arg::new("version") - .long("version") - .help("Print version information") - .global(true) - .generated(), - ) - } - - new_inner(name.into()) - } - - /// Adds an [argument] to the list of valid possibilities. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, arg, Arg}; - /// Command::new("myprog") - /// // Adding a single "flag" argument with a short and help text, using Arg::new() - /// .arg( - /// Arg::new("debug") - /// .short('d') - /// .help("turns on debugging mode") - /// ) - /// // Adding a single "option" argument with a short, a long, and help text using the less - /// // verbose Arg::from() - /// .arg( - /// arg!(-c --config <CONFIG> "Optionally sets a config file to use") - /// ) - /// # ; - /// ``` - /// [argument]: Arg - #[must_use] - pub fn arg<A: Into<Arg<'help>>>(mut self, a: A) -> Self { - let mut arg = a.into(); - if let Some(current_disp_ord) = self.current_disp_ord.as_mut() { - if !arg.is_positional() && arg.provider != ArgProvider::Generated { - let current = *current_disp_ord; - arg.disp_ord.set_implicit(current); - *current_disp_ord = current + 1; - } - } - - arg.help_heading.get_or_insert(self.current_help_heading); - self.args.push(arg); - self - } - - /// Adds multiple [arguments] to the list of valid possibilities. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, arg, Arg}; - /// Command::new("myprog") - /// .args(&[ - /// arg!("[debug] -d 'turns on debugging info'"), - /// Arg::new("input").help("the input file to use") - /// ]) - /// # ; - /// ``` - /// [arguments]: Arg - #[must_use] - pub fn args<I, T>(mut self, args: I) -> Self - where - I: IntoIterator<Item = T>, - T: Into<Arg<'help>>, - { - let args = args.into_iter(); - let (lower, _) = args.size_hint(); - self.args.reserve(lower); - - for arg in args { - self = self.arg(arg); - } - self - } - - /// Allows one to mutate an [`Arg`] after it's been added to a [`Command`]. - /// - /// This can be useful for modifying the auto-generated help or version arguments. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// - /// let mut cmd = Command::new("foo") - /// .arg(Arg::new("bar") - /// .short('b')) - /// .mut_arg("bar", |a| a.short('B')); - /// - /// let res = cmd.try_get_matches_from_mut(vec!["foo", "-b"]); - /// - /// // Since we changed `bar`'s short to "B" this should err as there - /// // is no `-b` anymore, only `-B` - /// - /// assert!(res.is_err()); - /// - /// let res = cmd.try_get_matches_from_mut(vec!["foo", "-B"]); - /// assert!(res.is_ok()); - /// ``` - #[must_use] - pub fn mut_arg<T, F>(mut self, arg_id: T, f: F) -> Self - where - F: FnOnce(Arg<'help>) -> Arg<'help>, - T: Key + Into<&'help str>, - { - let arg_id: &str = arg_id.into(); - let id = Id::from(arg_id); - - let mut a = self.args.remove_by_name(&id).unwrap_or_else(|| Arg { - id, - name: arg_id, - ..Arg::default() - }); - - if a.provider == ArgProvider::Generated { - a.provider = ArgProvider::GeneratedMutated; - } - - self.args.push(f(a)); - self - } - - /// Allows one to mutate a [`Command`] after it's been added as a subcommand. - /// - /// This can be useful for modifying auto-generated arguments of nested subcommands with - /// [`Command::mut_arg`]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::Command; - /// - /// let mut cmd = Command::new("foo") - /// .subcommand(Command::new("bar")) - /// .mut_subcommand("bar", |subcmd| subcmd.disable_help_flag(true)); - /// - /// let res = cmd.try_get_matches_from_mut(vec!["foo", "bar", "--help"]); - /// - /// // Since we disabled the help flag on the "bar" subcommand, this should err. - /// - /// assert!(res.is_err()); - /// - /// let res = cmd.try_get_matches_from_mut(vec!["foo", "bar"]); - /// assert!(res.is_ok()); - /// ``` - #[must_use] - pub fn mut_subcommand<'a, T, F>(mut self, subcmd_id: T, f: F) -> Self - where - F: FnOnce(App<'help>) -> App<'help>, - T: Into<&'a str>, - { - let subcmd_id: &str = subcmd_id.into(); - let id = Id::from(subcmd_id); - - let pos = self.subcommands.iter().position(|s| s.id == id); - - let subcmd = if let Some(idx) = pos { - self.subcommands.remove(idx) - } else { - App::new(subcmd_id) - }; - - self.subcommands.push(f(subcmd)); - self - } - - /// Adds an [`ArgGroup`] to the application. - /// - /// [`ArgGroup`]s are a family of related arguments. - /// By placing them in a logical group, you can build easier requirement and exclusion rules. - /// - /// Example use cases: - /// - Make an entire [`ArgGroup`] required, meaning that one (and *only* - /// one) argument from that group must be present at runtime. - /// - Name an [`ArgGroup`] as a conflict to another argument. - /// Meaning any of the arguments that belong to that group will cause a failure if present with - /// the conflicting argument. - /// - Ensure exclusion between arguments. - /// - Extract a value from a group instead of determining exactly which argument was used. - /// - /// # Examples - /// - /// The following example demonstrates using an [`ArgGroup`] to ensure that one, and only one, - /// of the arguments from the specified group is present at runtime. - /// - /// ```no_run - /// # use clap::{Command, arg, ArgGroup}; - /// Command::new("cmd") - /// .arg(arg!("--set-ver [ver] 'set the version manually'")) - /// .arg(arg!("--major 'auto increase major'")) - /// .arg(arg!("--minor 'auto increase minor'")) - /// .arg(arg!("--patch 'auto increase patch'")) - /// .group(ArgGroup::new("vers") - /// .args(&["set-ver", "major", "minor","patch"]) - /// .required(true)) - /// # ; - /// ``` - #[inline] - #[must_use] - pub fn group<G: Into<ArgGroup<'help>>>(mut self, group: G) -> Self { - self.groups.push(group.into()); - self - } - - /// Adds multiple [`ArgGroup`]s to the [`Command`] at once. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, arg, ArgGroup}; - /// Command::new("cmd") - /// .arg(arg!("--set-ver [ver] 'set the version manually'")) - /// .arg(arg!("--major 'auto increase major'")) - /// .arg(arg!("--minor 'auto increase minor'")) - /// .arg(arg!("--patch 'auto increase patch'")) - /// .arg(arg!("-c [FILE] 'a config file'")) - /// .arg(arg!("-i [IFACE] 'an interface'")) - /// .groups(&[ - /// ArgGroup::new("vers") - /// .args(&["set-ver", "major", "minor","patch"]) - /// .required(true), - /// ArgGroup::new("input") - /// .args(&["c", "i"]) - /// ]) - /// # ; - /// ``` - #[must_use] - pub fn groups<I, T>(mut self, groups: I) -> Self - where - I: IntoIterator<Item = T>, - T: Into<ArgGroup<'help>>, - { - for g in groups.into_iter() { - self = self.group(g.into()); - } - self - } - - /// Adds a subcommand to the list of valid possibilities. - /// - /// Subcommands are effectively sub-[`Command`]s, because they can contain their own arguments, - /// subcommands, version, usage, etc. They also function just like [`Command`]s, in that they get - /// their own auto generated help, version, and usage. - /// - /// A subcommand's [`Command::name`] will be used for: - /// - The argument the user passes in - /// - Programmatically looking up the subcommand - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, arg}; - /// Command::new("myprog") - /// .subcommand(Command::new("config") - /// .about("Controls configuration features") - /// .arg(arg!("<config> 'Required configuration file to use'"))) - /// # ; - /// ``` - #[inline] - #[must_use] - pub fn subcommand<S: Into<App<'help>>>(mut self, subcmd: S) -> Self { - self.subcommands.push(subcmd.into()); - self - } - - /// Adds multiple subcommands to the list of valid possibilities. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg, }; - /// # Command::new("myprog") - /// .subcommands( vec![ - /// Command::new("config").about("Controls configuration functionality") - /// .arg(Arg::new("config_file")), - /// Command::new("debug").about("Controls debug functionality")]) - /// # ; - /// ``` - /// [`IntoIterator`]: std::iter::IntoIterator - #[must_use] - pub fn subcommands<I, T>(mut self, subcmds: I) -> Self - where - I: IntoIterator<Item = T>, - T: Into<App<'help>>, - { - for subcmd in subcmds.into_iter() { - self.subcommands.push(subcmd.into()); - } - self - } - - /// Catch problems earlier in the development cycle. - /// - /// Most error states are handled as asserts under the assumption they are programming mistake - /// and not something to handle at runtime. Rather than relying on tests (manual or automated) - /// that exhaustively test your CLI to ensure the asserts are evaluated, this will run those - /// asserts in a way convenient for running as a test. - /// - /// **Note::** This will not help with asserts in [`ArgMatches`], those will need exhaustive - /// testing of your CLI. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg, ArgAction}; - /// fn cmd() -> Command<'static> { - /// Command::new("foo") - /// .arg( - /// Arg::new("bar").short('b').action(ArgAction::SetTrue) - /// ) - /// } - /// - /// #[test] - /// fn verify_app() { - /// cmd().debug_assert(); - /// } - /// - /// fn main() { - /// let m = cmd().get_matches_from(vec!["foo", "-b"]); - /// println!("{}", *m.get_one::<bool>("bar").expect("defaulted by clap")); - /// } - /// ``` - pub fn debug_assert(mut self) { - self._build_all(); - } - - /// Custom error message for post-parsing validation - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, ErrorKind}; - /// let mut cmd = Command::new("myprog"); - /// let err = cmd.error(ErrorKind::InvalidValue, "Some failure case"); - /// ``` - pub fn error(&mut self, kind: ErrorKind, message: impl std::fmt::Display) -> Error { - Error::raw(kind, message).format(self) - } - - /// Parse [`env::args_os`], exiting on failure. - /// - /// # Panics - /// - /// If contradictory arguments or settings exist. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// let matches = Command::new("myprog") - /// // Args and options go here... - /// .get_matches(); - /// ``` - /// [`env::args_os`]: std::env::args_os() - /// [`App::try_get_matches_from_mut`]: Command::try_get_matches_from_mut() - #[inline] - pub fn get_matches(self) -> ArgMatches { - self.get_matches_from(&mut env::args_os()) - } - - /// Parse [`env::args_os`], exiting on failure. - /// - /// Like [`App::get_matches`] but doesn't consume the `Command`. - /// - /// # Panics - /// - /// If contradictory arguments or settings exist. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// let mut cmd = Command::new("myprog") - /// // Args and options go here... - /// ; - /// let matches = cmd.get_matches_mut(); - /// ``` - /// [`env::args_os`]: std::env::args_os() - /// [`App::get_matches`]: Command::get_matches() - pub fn get_matches_mut(&mut self) -> ArgMatches { - self.try_get_matches_from_mut(&mut env::args_os()) - .unwrap_or_else(|e| e.exit()) - } - - /// Parse [`env::args_os`], returning a [`clap::Result`] on failure. - /// - /// **NOTE:** This method WILL NOT exit when `--help` or `--version` (or short versions) are - /// used. It will return a [`clap::Error`], where the [`kind`] is a - /// [`ErrorKind::DisplayHelp`] or [`ErrorKind::DisplayVersion`] respectively. You must call - /// [`Error::exit`] or perform a [`std::process::exit`]. - /// - /// # Panics - /// - /// If contradictory arguments or settings exist. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// let matches = Command::new("myprog") - /// // Args and options go here... - /// .try_get_matches() - /// .unwrap_or_else(|e| e.exit()); - /// ``` - /// [`env::args_os`]: std::env::args_os() - /// [`Error::exit`]: crate::Error::exit() - /// [`std::process::exit`]: std::process::exit() - /// [`clap::Result`]: Result - /// [`clap::Error`]: crate::Error - /// [`kind`]: crate::Error - /// [`ErrorKind::DisplayHelp`]: crate::ErrorKind::DisplayHelp - /// [`ErrorKind::DisplayVersion`]: crate::ErrorKind::DisplayVersion - #[inline] - pub fn try_get_matches(self) -> ClapResult<ArgMatches> { - // Start the parsing - self.try_get_matches_from(&mut env::args_os()) - } - - /// Parse the specified arguments, exiting on failure. - /// - /// **NOTE:** The first argument will be parsed as the binary name unless - /// [`Command::no_binary_name`] is used. - /// - /// # Panics - /// - /// If contradictory arguments or settings exist. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// let arg_vec = vec!["my_prog", "some", "args", "to", "parse"]; - /// - /// let matches = Command::new("myprog") - /// // Args and options go here... - /// .get_matches_from(arg_vec); - /// ``` - /// [`App::get_matches`]: Command::get_matches() - /// [`clap::Result`]: Result - /// [`Vec`]: std::vec::Vec - pub fn get_matches_from<I, T>(mut self, itr: I) -> ArgMatches - where - I: IntoIterator<Item = T>, - T: Into<OsString> + Clone, - { - self.try_get_matches_from_mut(itr).unwrap_or_else(|e| { - drop(self); - e.exit() - }) - } - - /// Parse the specified arguments, returning a [`clap::Result`] on failure. - /// - /// **NOTE:** This method WILL NOT exit when `--help` or `--version` (or short versions) are - /// used. It will return a [`clap::Error`], where the [`kind`] is a [`ErrorKind::DisplayHelp`] - /// or [`ErrorKind::DisplayVersion`] respectively. You must call [`Error::exit`] or - /// perform a [`std::process::exit`] yourself. - /// - /// **NOTE:** The first argument will be parsed as the binary name unless - /// [`Command::no_binary_name`] is used. - /// - /// # Panics - /// - /// If contradictory arguments or settings exist. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// let arg_vec = vec!["my_prog", "some", "args", "to", "parse"]; - /// - /// let matches = Command::new("myprog") - /// // Args and options go here... - /// .try_get_matches_from(arg_vec) - /// .unwrap_or_else(|e| e.exit()); - /// ``` - /// [`App::get_matches_from`]: Command::get_matches_from() - /// [`App::try_get_matches`]: Command::try_get_matches() - /// [`Error::exit`]: crate::Error::exit() - /// [`std::process::exit`]: std::process::exit() - /// [`clap::Error`]: crate::Error - /// [`Error::exit`]: crate::Error::exit() - /// [`kind`]: crate::Error - /// [`ErrorKind::DisplayHelp`]: crate::ErrorKind::DisplayHelp - /// [`ErrorKind::DisplayVersion`]: crate::ErrorKind::DisplayVersion - /// [`clap::Result`]: Result - pub fn try_get_matches_from<I, T>(mut self, itr: I) -> ClapResult<ArgMatches> - where - I: IntoIterator<Item = T>, - T: Into<OsString> + Clone, - { - self.try_get_matches_from_mut(itr) - } - - /// Parse the specified arguments, returning a [`clap::Result`] on failure. - /// - /// Like [`App::try_get_matches_from`] but doesn't consume the `Command`. - /// - /// **NOTE:** This method WILL NOT exit when `--help` or `--version` (or short versions) are - /// used. It will return a [`clap::Error`], where the [`kind`] is a [`ErrorKind::DisplayHelp`] - /// or [`ErrorKind::DisplayVersion`] respectively. You must call [`Error::exit`] or - /// perform a [`std::process::exit`] yourself. - /// - /// **NOTE:** The first argument will be parsed as the binary name unless - /// [`Command::no_binary_name`] is used. - /// - /// # Panics - /// - /// If contradictory arguments or settings exist. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// let arg_vec = vec!["my_prog", "some", "args", "to", "parse"]; - /// - /// let mut cmd = Command::new("myprog"); - /// // Args and options go here... - /// let matches = cmd.try_get_matches_from_mut(arg_vec) - /// .unwrap_or_else(|e| e.exit()); - /// ``` - /// [`App::try_get_matches_from`]: Command::try_get_matches_from() - /// [`clap::Result`]: Result - /// [`clap::Error`]: crate::Error - /// [`kind`]: crate::Error - pub fn try_get_matches_from_mut<I, T>(&mut self, itr: I) -> ClapResult<ArgMatches> - where - I: IntoIterator<Item = T>, - T: Into<OsString> + Clone, - { - let mut raw_args = clap_lex::RawArgs::new(itr.into_iter()); - let mut cursor = raw_args.cursor(); - - if self.settings.is_set(AppSettings::Multicall) { - if let Some(argv0) = raw_args.next_os(&mut cursor) { - let argv0 = Path::new(&argv0); - if let Some(command) = argv0.file_stem().and_then(|f| f.to_str()) { - // Stop borrowing command so we can get another mut ref to it. - let command = command.to_owned(); - debug!( - "Command::try_get_matches_from_mut: Parsed command {} from argv", - command - ); - - debug!("Command::try_get_matches_from_mut: Reinserting command into arguments so subcommand parser matches it"); - raw_args.insert(&cursor, &[&command]); - debug!("Command::try_get_matches_from_mut: Clearing name and bin_name so that displayed command name starts with applet name"); - self.name.clear(); - self.bin_name = None; - return self._do_parse(&mut raw_args, cursor); - } - } - }; - - // Get the name of the program (argument 1 of env::args()) and determine the - // actual file - // that was used to execute the program. This is because a program called - // ./target/release/my_prog -a - // will have two arguments, './target/release/my_prog', '-a' but we don't want - // to display - // the full path when displaying help messages and such - if !self.settings.is_set(AppSettings::NoBinaryName) { - if let Some(name) = raw_args.next_os(&mut cursor) { - let p = Path::new(name); - - if let Some(f) = p.file_name() { - if let Some(s) = f.to_str() { - if self.bin_name.is_none() { - self.bin_name = Some(s.to_owned()); - } - } - } - } - } - - self._do_parse(&mut raw_args, cursor) - } - - /// Prints the short help message (`-h`) to [`io::stdout()`]. - /// - /// See also [`Command::print_long_help`]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::Command; - /// let mut cmd = Command::new("myprog"); - /// cmd.print_help(); - /// ``` - /// [`io::stdout()`]: std::io::stdout() - pub fn print_help(&mut self) -> io::Result<()> { - self._build_self(); - let color = self.color_help(); - - let mut c = Colorizer::new(Stream::Stdout, color); - let usage = Usage::new(self); - Help::new(HelpWriter::Buffer(&mut c), self, &usage, false).write_help()?; - c.print() - } - - /// Prints the long help message (`--help`) to [`io::stdout()`]. - /// - /// See also [`Command::print_help`]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::Command; - /// let mut cmd = Command::new("myprog"); - /// cmd.print_long_help(); - /// ``` - /// [`io::stdout()`]: std::io::stdout() - /// [`BufWriter`]: std::io::BufWriter - /// [`-h` (short)]: Arg::help() - /// [`--help` (long)]: Arg::long_help() - pub fn print_long_help(&mut self) -> io::Result<()> { - self._build_self(); - let color = self.color_help(); - - let mut c = Colorizer::new(Stream::Stdout, color); - let usage = Usage::new(self); - Help::new(HelpWriter::Buffer(&mut c), self, &usage, true).write_help()?; - c.print() - } - - /// Writes the short help message (`-h`) to a [`io::Write`] object. - /// - /// See also [`Command::write_long_help`]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::Command; - /// use std::io; - /// let mut cmd = Command::new("myprog"); - /// let mut out = io::stdout(); - /// cmd.write_help(&mut out).expect("failed to write to stdout"); - /// ``` - /// [`io::Write`]: std::io::Write - /// [`-h` (short)]: Arg::help() - /// [`--help` (long)]: Arg::long_help() - pub fn write_help<W: io::Write>(&mut self, w: &mut W) -> io::Result<()> { - self._build_self(); - - let usage = Usage::new(self); - Help::new(HelpWriter::Normal(w), self, &usage, false).write_help()?; - w.flush() - } - - /// Writes the long help message (`--help`) to a [`io::Write`] object. - /// - /// See also [`Command::write_help`]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::Command; - /// use std::io; - /// let mut cmd = Command::new("myprog"); - /// let mut out = io::stdout(); - /// cmd.write_long_help(&mut out).expect("failed to write to stdout"); - /// ``` - /// [`io::Write`]: std::io::Write - /// [`-h` (short)]: Arg::help() - /// [`--help` (long)]: Arg::long_help() - pub fn write_long_help<W: io::Write>(&mut self, w: &mut W) -> io::Result<()> { - self._build_self(); - - let usage = Usage::new(self); - Help::new(HelpWriter::Normal(w), self, &usage, true).write_help()?; - w.flush() - } - - /// Version message rendered as if the user ran `-V`. - /// - /// See also [`Command::render_long_version`]. - /// - /// ### Coloring - /// - /// This function does not try to color the message nor it inserts any [ANSI escape codes]. - /// - /// ### Examples - /// - /// ```rust - /// # use clap::Command; - /// use std::io; - /// let cmd = Command::new("myprog"); - /// println!("{}", cmd.render_version()); - /// ``` - /// [`io::Write`]: std::io::Write - /// [`-V` (short)]: Command::version() - /// [`--version` (long)]: Command::long_version() - /// [ANSI escape codes]: https://en.wikipedia.org/wiki/ANSI_escape_code - pub fn render_version(&self) -> String { - self._render_version(false) - } - - /// Version message rendered as if the user ran `--version`. - /// - /// See also [`Command::render_version`]. - /// - /// ### Coloring - /// - /// This function does not try to color the message nor it inserts any [ANSI escape codes]. - /// - /// ### Examples - /// - /// ```rust - /// # use clap::Command; - /// use std::io; - /// let cmd = Command::new("myprog"); - /// println!("{}", cmd.render_long_version()); - /// ``` - /// [`io::Write`]: std::io::Write - /// [`-V` (short)]: Command::version() - /// [`--version` (long)]: Command::long_version() - /// [ANSI escape codes]: https://en.wikipedia.org/wiki/ANSI_escape_code - pub fn render_long_version(&self) -> String { - self._render_version(true) - } - - /// Usage statement - /// - /// ### Examples - /// - /// ```rust - /// # use clap::Command; - /// use std::io; - /// let mut cmd = Command::new("myprog"); - /// println!("{}", cmd.render_usage()); - /// ``` - pub fn render_usage(&mut self) -> String { - // If there are global arguments, or settings we need to propagate them down to subcommands - // before parsing incase we run into a subcommand - self._build_self(); - - Usage::new(self).create_usage_with_title(&[]) - } -} - -/// # Application-wide Settings -/// -/// These settings will apply to the top-level command and all subcommands, by default. Some -/// settings can be overridden in subcommands. -impl<'help> App<'help> { - /// Specifies that the parser should not assume the first argument passed is the binary name. - /// - /// This is normally the case when using a "daemon" style mode. For shells / REPLs, see - /// [`Command::multicall`][App::multicall]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, arg}; - /// let m = Command::new("myprog") - /// .no_binary_name(true) - /// .arg(arg!(<cmd> ... "commands to run")) - /// .get_matches_from(vec!["command", "set"]); - /// - /// let cmds: Vec<&str> = m.values_of("cmd").unwrap().collect(); - /// assert_eq!(cmds, ["command", "set"]); - /// ``` - /// [`try_get_matches_from_mut`]: crate::Command::try_get_matches_from_mut() - #[inline] - pub fn no_binary_name(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::NoBinaryName) - } else { - self.unset_global_setting(AppSettings::NoBinaryName) - } - } - - /// Try not to fail on parse errors, like missing option values. - /// - /// **Note:** Make sure you apply it as `global_setting` if you want this setting - /// to be propagated to subcommands and sub-subcommands! - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, arg}; - /// let cmd = Command::new("cmd") - /// .ignore_errors(true) - /// .arg(arg!(-c --config <FILE> "Sets a custom config file").required(false)) - /// .arg(arg!(-x --stuff <FILE> "Sets a custom stuff file").required(false)) - /// .arg(arg!(f: -f "Flag")); - /// - /// let r = cmd.try_get_matches_from(vec!["cmd", "-c", "file", "-f", "-x"]); - /// - /// assert!(r.is_ok(), "unexpected error: {:?}", r); - /// let m = r.unwrap(); - /// assert_eq!(m.value_of("config"), Some("file")); - /// assert!(m.is_present("f")); - /// assert_eq!(m.value_of("stuff"), None); - /// ``` - #[inline] - pub fn ignore_errors(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::IgnoreErrors) - } else { - self.unset_global_setting(AppSettings::IgnoreErrors) - } - } - - /// Deprecated, replaced with [`ArgAction::Set`][super::ArgAction::Set] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.2.0", note = "Replaced with `Arg::action(ArgAction::Set)`") - )] - pub fn args_override_self(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::AllArgsOverrideSelf) - } else { - self.unset_global_setting(AppSettings::AllArgsOverrideSelf) - } - } - - /// Disables the automatic delimiting of values after `--` or when [`Command::trailing_var_arg`] - /// was used. - /// - /// **NOTE:** The same thing can be done manually by setting the final positional argument to - /// [`Arg::use_value_delimiter(false)`]. Using this setting is safer, because it's easier to locate - /// when making changes. - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .dont_delimit_trailing_values(true) - /// .get_matches(); - /// ``` - /// - /// [`Arg::use_value_delimiter(false)`]: crate::Arg::use_value_delimiter() - #[inline] - pub fn dont_delimit_trailing_values(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::DontDelimitTrailingValues) - } else { - self.unset_global_setting(AppSettings::DontDelimitTrailingValues) - } - } - - /// Sets when to color output. - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// **NOTE:** Default behaviour is [`ColorChoice::Auto`]. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, ColorChoice}; - /// Command::new("myprog") - /// .color(ColorChoice::Never) - /// .get_matches(); - /// ``` - /// [`ColorChoice::Auto`]: crate::ColorChoice::Auto - #[cfg(feature = "color")] - #[inline] - #[must_use] - pub fn color(self, color: ColorChoice) -> Self { - #![allow(deprecated)] - let cmd = self - .unset_global_setting(AppSettings::ColorAuto) - .unset_global_setting(AppSettings::ColorAlways) - .unset_global_setting(AppSettings::ColorNever); - match color { - ColorChoice::Auto => cmd.global_setting(AppSettings::ColorAuto), - ColorChoice::Always => cmd.global_setting(AppSettings::ColorAlways), - ColorChoice::Never => cmd.global_setting(AppSettings::ColorNever), - } - } - - /// Sets the terminal width at which to wrap help messages. - /// - /// Using `0` will ignore terminal widths and use source formatting. - /// - /// Defaults to current terminal width when `wrap_help` feature flag is enabled. If the flag - /// is disabled or it cannot be determined, the default is 100. - /// - /// **NOTE:** This setting applies globally and *not* on a per-command basis. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .term_width(80) - /// # ; - /// ``` - #[inline] - #[must_use] - pub fn term_width(mut self, width: usize) -> Self { - self.term_w = Some(width); - self - } - - /// Sets the maximum terminal width at which to wrap help messages. - /// - /// This only applies when setting the current terminal width. See [`Command::term_width`] for - /// more details. - /// - /// Using `0` will ignore terminal widths and use source formatting. - /// - /// **NOTE:** This setting applies globally and *not* on a per-command basis. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .max_term_width(100) - /// # ; - /// ``` - #[inline] - #[must_use] - pub fn max_term_width(mut self, w: usize) -> Self { - self.max_w = Some(w); - self - } - - /// Disables `-V` and `--version` flag. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, ErrorKind}; - /// let res = Command::new("myprog") - /// .disable_version_flag(true) - /// .try_get_matches_from(vec![ - /// "myprog", "-V" - /// ]); - /// assert!(res.is_err()); - /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); - /// ``` - #[inline] - pub fn disable_version_flag(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::DisableVersionFlag) - } else { - self.unset_global_setting(AppSettings::DisableVersionFlag) - } - } - - /// Specifies to use the version of the current command for all [`subcommands`]. - /// - /// Defaults to `false`; subcommands have independent version strings from their parents. - /// - /// **Note:** Make sure you apply it as `global_setting` if you want this setting - /// to be propagated to subcommands and sub-subcommands! - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .version("v1.1") - /// .propagate_version(true) - /// .subcommand(Command::new("test")) - /// .get_matches(); - /// // running `$ myprog test --version` will display - /// // "myprog-test v1.1" - /// ``` - /// - /// [`subcommands`]: crate::Command::subcommand() - #[inline] - pub fn propagate_version(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::PropagateVersion) - } else { - self.unset_global_setting(AppSettings::PropagateVersion) - } - } - - /// Places the help string for all arguments and subcommands on the line after them. - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .next_line_help(true) - /// .get_matches(); - /// ``` - #[inline] - pub fn next_line_help(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::NextLineHelp) - } else { - self.unset_global_setting(AppSettings::NextLineHelp) - } - } - - /// Disables `-h` and `--help` flag. - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, ErrorKind}; - /// let res = Command::new("myprog") - /// .disable_help_flag(true) - /// .try_get_matches_from(vec![ - /// "myprog", "-h" - /// ]); - /// assert!(res.is_err()); - /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); - /// ``` - #[inline] - pub fn disable_help_flag(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::DisableHelpFlag) - } else { - self.unset_global_setting(AppSettings::DisableHelpFlag) - } - } - - /// Disables the `help` [`subcommand`]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, ErrorKind}; - /// let res = Command::new("myprog") - /// .disable_help_subcommand(true) - /// // Normally, creating a subcommand causes a `help` subcommand to automatically - /// // be generated as well - /// .subcommand(Command::new("test")) - /// .try_get_matches_from(vec![ - /// "myprog", "help" - /// ]); - /// assert!(res.is_err()); - /// assert_eq!(res.unwrap_err().kind(), ErrorKind::UnknownArgument); - /// ``` - /// - /// [`subcommand`]: crate::Command::subcommand() - #[inline] - pub fn disable_help_subcommand(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::DisableHelpSubcommand) - } else { - self.unset_global_setting(AppSettings::DisableHelpSubcommand) - } - } - - /// Disables colorized help messages. - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .disable_colored_help(true) - /// .get_matches(); - /// ``` - #[inline] - pub fn disable_colored_help(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::DisableColoredHelp) - } else { - self.unset_global_setting(AppSettings::DisableColoredHelp) - } - } - - /// Panic if help descriptions are omitted. - /// - /// **NOTE:** When deriving [`Parser`][crate::Parser], you could instead check this at - /// compile-time with `#![deny(missing_docs)]` - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .help_expected(true) - /// .arg( - /// Arg::new("foo").help("It does foo stuff") - /// // As required via `help_expected`, a help message was supplied - /// ) - /// # .get_matches(); - /// ``` - /// - /// # Panics - /// - /// ```rust,no_run - /// # use clap::{Command, Arg}; - /// Command::new("myapp") - /// .help_expected(true) - /// .arg( - /// Arg::new("foo") - /// // Someone forgot to put .about("...") here - /// // Since the setting `help_expected` is activated, this will lead to - /// // a panic (if you are in debug mode) - /// ) - /// # .get_matches(); - ///``` - #[inline] - pub fn help_expected(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::HelpExpected) - } else { - self.unset_global_setting(AppSettings::HelpExpected) - } - } - - /// Disables the automatic collapsing of positional args into `[ARGS]` inside the usage string. - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .dont_collapse_args_in_usage(true) - /// .get_matches(); - /// ``` - #[inline] - pub fn dont_collapse_args_in_usage(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::DontCollapseArgsInUsage) - } else { - self.unset_global_setting(AppSettings::DontCollapseArgsInUsage) - } - } - - /// Tells `clap` *not* to print possible values when displaying help information. - /// - /// This can be useful if there are many values, or they are explained elsewhere. - /// - /// To set this per argument, see - /// [`Arg::hide_possible_values`][crate::Arg::hide_possible_values]. - /// - /// **NOTE:** This choice is propagated to all child subcommands. - #[inline] - pub fn hide_possible_values(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::HidePossibleValues) - } else { - self.unset_global_setting(AppSettings::HidePossibleValues) - } - } - - /// Allow partial matches of long arguments or their [aliases]. - /// - /// For example, to match an argument named `--test`, one could use `--t`, `--te`, `--tes`, and - /// `--test`. - /// - /// **NOTE:** The match *must not* be ambiguous at all in order to succeed. i.e. to match - /// `--te` to `--test` there could not also be another argument or alias `--temp` because both - /// start with `--te` - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// [aliases]: crate::Command::aliases() - #[inline] - pub fn infer_long_args(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::InferLongArgs) - } else { - self.unset_global_setting(AppSettings::InferLongArgs) - } - } - - /// Allow partial matches of [subcommand] names and their [aliases]. - /// - /// For example, to match a subcommand named `test`, one could use `t`, `te`, `tes`, and - /// `test`. - /// - /// **NOTE:** The match *must not* be ambiguous at all in order to succeed. i.e. to match `te` - /// to `test` there could not also be a subcommand or alias `temp` because both start with `te` - /// - /// **CAUTION:** This setting can interfere with [positional/free arguments], take care when - /// designing CLIs which allow inferred subcommands and have potential positional/free - /// arguments whose values could start with the same characters as subcommands. If this is the - /// case, it's recommended to use settings such as [`Command::args_conflicts_with_subcommands`] in - /// conjunction with this setting. - /// - /// **NOTE:** This choice is propagated to all child subcommands. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// let m = Command::new("prog") - /// .infer_subcommands(true) - /// .subcommand(Command::new("test")) - /// .get_matches_from(vec![ - /// "prog", "te" - /// ]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - /// - /// [subcommand]: crate::Command::subcommand() - /// [positional/free arguments]: crate::Arg::index() - /// [aliases]: crate::Command::aliases() - #[inline] - pub fn infer_subcommands(self, yes: bool) -> Self { - if yes { - self.global_setting(AppSettings::InferSubcommands) - } else { - self.unset_global_setting(AppSettings::InferSubcommands) - } - } -} - -/// # Command-specific Settings -/// -/// These apply only to the current command and are not inherited by subcommands. -impl<'help> App<'help> { - /// (Re)Sets the program's name. - /// - /// See [`Command::new`] for more details. - /// - /// # Examples - /// - /// ```ignore - /// # use clap::{Command, load_yaml}; - /// let yaml = load_yaml!("cmd.yaml"); - /// let cmd = Command::from(yaml) - /// .name(crate_name!()); - /// - /// // continued logic goes here, such as `cmd.get_matches()` etc. - /// ``` - #[must_use] - pub fn name<S: Into<String>>(mut self, name: S) -> Self { - self.name = name.into(); - self - } - - /// Overrides the runtime-determined name of the binary for help and error messages. - /// - /// This should only be used when absolutely necessary, such as when the binary name for your - /// application is misleading, or perhaps *not* how the user should invoke your program. - /// - /// **Pro-tip:** When building things such as third party `cargo` - /// subcommands, this setting **should** be used! - /// - /// **NOTE:** This *does not* change or set the name of the binary file on - /// disk. It only changes what clap thinks the name is for the purposes of - /// error or help messages. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("My Program") - /// .bin_name("my_binary") - /// # ; - /// ``` - #[must_use] - pub fn bin_name<S: Into<String>>(mut self, name: S) -> Self { - self.bin_name = Some(name.into()); - self - } - - /// Overrides the runtime-determined display name of the program for help and error messages. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("My Program") - /// .display_name("my_program") - /// # ; - /// ``` - #[must_use] - pub fn display_name<S: Into<String>>(mut self, name: S) -> Self { - self.display_name = Some(name.into()); - self - } - - /// Sets the author(s) for the help message. - /// - /// **Pro-tip:** Use `clap`s convenience macro [`crate_authors!`] to - /// automatically set your application's author(s) to the same thing as your - /// crate at compile time. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .author("Me, me@mymain.com") - /// # ; - /// ``` - /// [`crate_authors!`]: ./macro.crate_authors!.html - #[must_use] - pub fn author<S: Into<&'help str>>(mut self, author: S) -> Self { - self.author = Some(author.into()); - self - } - - /// Sets the program's description for the short help (`-h`). - /// - /// If [`Command::long_about`] is not specified, this message will be displayed for `--help`. - /// - /// **NOTE:** Only `Command::about` (short format) is used in completion - /// script generation in order to be concise. - /// - /// See also [`crate_description!`](crate::crate_description!). - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .about("Does really amazing things for great people") - /// # ; - /// ``` - #[must_use] - pub fn about<O: Into<Option<&'help str>>>(mut self, about: O) -> Self { - self.about = about.into(); - self - } - - /// Sets the program's description for the long help (`--help`). - /// - /// If [`Command::about`] is not specified, this message will be displayed for `-h`. - /// - /// **NOTE:** Only [`Command::about`] (short format) is used in completion - /// script generation in order to be concise. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .long_about( - /// "Does really amazing things to great people. Now let's talk a little - /// more in depth about how this subcommand really works. It may take about - /// a few lines of text, but that's ok!") - /// # ; - /// ``` - /// [`App::about`]: Command::about() - #[must_use] - pub fn long_about<O: Into<Option<&'help str>>>(mut self, long_about: O) -> Self { - self.long_about = long_about.into(); - self - } - - /// Free-form help text for after auto-generated short help (`-h`). - /// - /// This is often used to describe how to use the arguments, caveats to be noted, or license - /// and contact information. - /// - /// If [`Command::after_long_help`] is not specified, this message will be displayed for `--help`. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .after_help("Does really amazing things for great people... but be careful with -R!") - /// # ; - /// ``` - /// - #[must_use] - pub fn after_help<S: Into<&'help str>>(mut self, help: S) -> Self { - self.after_help = Some(help.into()); - self - } - - /// Free-form help text for after auto-generated long help (`--help`). - /// - /// This is often used to describe how to use the arguments, caveats to be noted, or license - /// and contact information. - /// - /// If [`Command::after_help`] is not specified, this message will be displayed for `-h`. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .after_long_help("Does really amazing things to great people... but be careful with -R, \ - /// like, for real, be careful with this!") - /// # ; - /// ``` - #[must_use] - pub fn after_long_help<S: Into<&'help str>>(mut self, help: S) -> Self { - self.after_long_help = Some(help.into()); - self - } - - /// Free-form help text for before auto-generated short help (`-h`). - /// - /// This is often used for header, copyright, or license information. - /// - /// If [`Command::before_long_help`] is not specified, this message will be displayed for `--help`. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .before_help("Some info I'd like to appear before the help info") - /// # ; - /// ``` - #[must_use] - pub fn before_help<S: Into<&'help str>>(mut self, help: S) -> Self { - self.before_help = Some(help.into()); - self - } - - /// Free-form help text for before auto-generated long help (`--help`). - /// - /// This is often used for header, copyright, or license information. - /// - /// If [`Command::before_help`] is not specified, this message will be displayed for `-h`. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .before_long_help("Some verbose and long info I'd like to appear before the help info") - /// # ; - /// ``` - #[must_use] - pub fn before_long_help<S: Into<&'help str>>(mut self, help: S) -> Self { - self.before_long_help = Some(help.into()); - self - } - - /// Sets the version for the short version (`-V`) and help messages. - /// - /// If [`Command::long_version`] is not specified, this message will be displayed for `--version`. - /// - /// **Pro-tip:** Use `clap`s convenience macro [`crate_version!`] to - /// automatically set your application's version to the same thing as your - /// crate at compile time. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .version("v0.1.24") - /// # ; - /// ``` - /// [`crate_version!`]: ./macro.crate_version!.html - #[must_use] - pub fn version<S: Into<&'help str>>(mut self, ver: S) -> Self { - self.version = Some(ver.into()); - self - } - - /// Sets the version for the long version (`--version`) and help messages. - /// - /// If [`Command::version`] is not specified, this message will be displayed for `-V`. - /// - /// **Pro-tip:** Use `clap`s convenience macro [`crate_version!`] to - /// automatically set your application's version to the same thing as your - /// crate at compile time. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .long_version( - /// "v0.1.24 - /// commit: abcdef89726d - /// revision: 123 - /// release: 2 - /// binary: myprog") - /// # ; - /// ``` - /// [`crate_version!`]: ./macro.crate_version!.html - #[must_use] - pub fn long_version<S: Into<&'help str>>(mut self, ver: S) -> Self { - self.long_version = Some(ver.into()); - self - } - - /// Overrides the `clap` generated usage string for help and error messages. - /// - /// **NOTE:** Using this setting disables `clap`s "context-aware" usage - /// strings. After this setting is set, this will be *the only* usage string - /// displayed to the user! - /// - /// **NOTE:** Multiple usage lines may be present in the usage argument, but - /// some rules need to be followed to ensure the usage lines are formatted - /// correctly by the default help formatter: - /// - /// - Do not indent the first usage line. - /// - Indent all subsequent usage lines with four spaces. - /// - The last line must not end with a newline. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .override_usage("myapp [-clDas] <some_file>") - /// # ; - /// ``` - /// - /// Or for multiple usage lines: - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .override_usage( - /// "myapp -X [-a] [-b] <file>\n \ - /// myapp -Y [-c] <file1> <file2>\n \ - /// myapp -Z [-d|-e]" - /// ) - /// # ; - /// ``` - /// - /// [`ArgMatches::usage`]: ArgMatches::usage() - #[must_use] - pub fn override_usage<S: Into<&'help str>>(mut self, usage: S) -> Self { - self.usage_str = Some(usage.into()); - self - } - - /// Overrides the `clap` generated help message (both `-h` and `--help`). - /// - /// This should only be used when the auto-generated message does not suffice. - /// - /// **NOTE:** This **only** replaces the help message for the current - /// command, meaning if you are using subcommands, those help messages will - /// still be auto-generated unless you specify a [`Command::override_help`] for - /// them as well. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myapp") - /// .override_help("myapp v1.0\n\ - /// Does awesome things\n\ - /// (C) me@mail.com\n\n\ - /// - /// USAGE: myapp <opts> <command>\n\n\ - /// - /// Options:\n\ - /// -h, --help Display this message\n\ - /// -V, --version Display version info\n\ - /// -s <stuff> Do something with stuff\n\ - /// -v Be verbose\n\n\ - /// - /// Commands:\n\ - /// help Print this message\n\ - /// work Do some work") - /// # ; - /// ``` - #[must_use] - pub fn override_help<S: Into<&'help str>>(mut self, help: S) -> Self { - self.help_str = Some(help.into()); - self - } - - /// Sets the help template to be used, overriding the default format. - /// - /// **NOTE:** The template system is by design very simple. Therefore, the - /// tags have to be written in the lowercase and without spacing. - /// - /// Tags are given inside curly brackets. - /// - /// Valid tags are: - /// - /// * `{name}` - Display name for the (sub-)command. - /// * `{bin}` - Binary name. - /// * `{version}` - Version number. - /// * `{author}` - Author information. - /// * `{author-with-newline}` - Author followed by `\n`. - /// * `{author-section}` - Author preceded and followed by `\n`. - /// * `{about}` - General description (from [`Command::about`] or - /// [`Command::long_about`]). - /// * `{about-with-newline}` - About followed by `\n`. - /// * `{about-section}` - About preceded and followed by '\n'. - /// * `{usage-heading}` - Automatically generated usage heading. - /// * `{usage}` - Automatically generated or given usage string. - /// * `{all-args}` - Help for all arguments (options, flags, positional - /// arguments, and subcommands) including titles. - /// * `{options}` - Help for options. - /// * `{positionals}` - Help for positional arguments. - /// * `{subcommands}` - Help for subcommands. - /// * `{after-help}` - Help from [`App::after_help`] or [`Command::after_long_help`]. - /// * `{before-help}` - Help from [`App::before_help`] or [`Command::before_long_help`]. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::Command; - /// Command::new("myprog") - /// .version("1.0") - /// .help_template("{bin} ({version}) - {usage}") - /// # ; - /// ``` - /// [`App::about`]: Command::about() - /// [`App::long_about`]: Command::long_about() - /// [`App::after_help`]: Command::after_help() - /// [`App::after_long_help`]: Command::after_long_help() - /// [`App::before_help`]: Command::before_help() - /// [`App::before_long_help`]: Command::before_long_help() - #[must_use] - pub fn help_template<S: Into<&'help str>>(mut self, s: S) -> Self { - self.template = Some(s.into()); - self - } - - /// Apply a setting for the current command or subcommand. - /// - /// See [`Command::global_setting`] to apply a setting to this command and all subcommands. - /// - /// See [`AppSettings`] for a full list of possibilities and examples. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, AppSettings}; - /// Command::new("myprog") - /// .setting(AppSettings::SubcommandRequired) - /// .setting(AppSettings::AllowLeadingHyphen) - /// # ; - /// ``` - /// or - /// ```no_run - /// # use clap::{Command, AppSettings}; - /// Command::new("myprog") - /// .setting(AppSettings::SubcommandRequired | AppSettings::AllowLeadingHyphen) - /// # ; - /// ``` - #[inline] - #[must_use] - pub fn setting<F>(mut self, setting: F) -> Self - where - F: Into<AppFlags>, - { - self.settings.insert(setting.into()); - self - } - - /// Remove a setting for the current command or subcommand. - /// - /// See [`AppSettings`] for a full list of possibilities and examples. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, AppSettings}; - /// Command::new("myprog") - /// .unset_setting(AppSettings::SubcommandRequired) - /// .setting(AppSettings::AllowLeadingHyphen) - /// # ; - /// ``` - /// or - /// ```no_run - /// # use clap::{Command, AppSettings}; - /// Command::new("myprog") - /// .unset_setting(AppSettings::SubcommandRequired | AppSettings::AllowLeadingHyphen) - /// # ; - /// ``` - #[inline] - #[must_use] - pub fn unset_setting<F>(mut self, setting: F) -> Self - where - F: Into<AppFlags>, - { - self.settings.remove(setting.into()); - self - } - - /// Apply a setting for the current command and all subcommands. - /// - /// See [`Command::setting`] to apply a setting only to this command. - /// - /// See [`AppSettings`] for a full list of possibilities and examples. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, AppSettings}; - /// Command::new("myprog") - /// .global_setting(AppSettings::AllowNegativeNumbers) - /// # ; - /// ``` - #[inline] - #[must_use] - pub fn global_setting(mut self, setting: AppSettings) -> Self { - self.settings.set(setting); - self.g_settings.set(setting); - self - } - - /// Remove a setting and stop propagating down to subcommands. - /// - /// See [`AppSettings`] for a full list of possibilities and examples. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, AppSettings}; - /// Command::new("myprog") - /// .unset_global_setting(AppSettings::AllowNegativeNumbers) - /// # ; - /// ``` - /// [global]: Command::global_setting() - #[inline] - #[must_use] - pub fn unset_global_setting(mut self, setting: AppSettings) -> Self { - self.settings.unset(setting); - self.g_settings.unset(setting); - self - } - - /// Deprecated, replaced with [`Command::next_help_heading`] - #[inline] - #[must_use] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.0", note = "Replaced with `App::next_help_heading`") - )] - pub fn help_heading<O>(self, heading: O) -> Self - where - O: Into<Option<&'help str>>, - { - self.next_help_heading(heading) - } - - /// Set the default section heading for future args. - /// - /// This will be used for any arg that hasn't had [`Arg::help_heading`] called. - /// - /// This is useful if the default `OPTIONS` or `ARGS` headings are - /// not specific enough for one's use case. - /// - /// For subcommands, see [`Command::subcommand_help_heading`] - /// - /// [`App::arg`]: Command::arg() - /// [`Arg::help_heading`]: crate::Arg::help_heading() - #[inline] - #[must_use] - pub fn next_help_heading<O>(mut self, heading: O) -> Self - where - O: Into<Option<&'help str>>, - { - self.current_help_heading = heading.into(); - self - } - - /// Change the starting value for assigning future display orders for ags. - /// - /// This will be used for any arg that hasn't had [`Arg::display_order`] called. - #[inline] - #[must_use] - pub fn next_display_order(mut self, disp_ord: impl Into<Option<usize>>) -> Self { - self.current_disp_ord = disp_ord.into(); - self - } - - /// Replaces an argument or subcommand used on the CLI at runtime with other arguments or subcommands. - /// - /// **Note:** This is gated behind [`unstable-replace`](https://github.com/clap-rs/clap/issues/2836) - /// - /// When this method is used, `name` is removed from the CLI, and `target` - /// is inserted in its place. Parsing continues as if the user typed - /// `target` instead of `name`. - /// - /// This can be used to create "shortcuts" for subcommands, or if a - /// particular argument has the semantic meaning of several other specific - /// arguments and values. - /// - /// # Examples - /// - /// We'll start with the "subcommand short" example. In this example, let's - /// assume we have a program with a subcommand `module` which can be invoked - /// via `cmd module`. Now let's also assume `module` also has a subcommand - /// called `install` which can be invoked `cmd module install`. If for some - /// reason users needed to be able to reach `cmd module install` via the - /// short-hand `cmd install`, we'd have several options. - /// - /// We *could* create another sibling subcommand to `module` called - /// `install`, but then we would need to manage another subcommand and manually - /// dispatch to `cmd module install` handling code. This is error prone and - /// tedious. - /// - /// We could instead use [`Command::replace`] so that, when the user types `cmd - /// install`, `clap` will replace `install` with `module install` which will - /// end up getting parsed as if the user typed the entire incantation. - /// - /// ```rust - /// # use clap::Command; - /// let m = Command::new("cmd") - /// .subcommand(Command::new("module") - /// .subcommand(Command::new("install"))) - /// .replace("install", &["module", "install"]) - /// .get_matches_from(vec!["cmd", "install"]); - /// - /// assert!(m.subcommand_matches("module").is_some()); - /// assert!(m.subcommand_matches("module").unwrap().subcommand_matches("install").is_some()); - /// ``` - /// - /// Now let's show an argument example! - /// - /// Let's assume we have an application with two flags `--save-context` and - /// `--save-runtime`. But often users end up needing to do *both* at the - /// same time. We can add a third flag `--save-all` which semantically means - /// the same thing as `cmd --save-context --save-runtime`. To implement that, - /// we have several options. - /// - /// We could create this third argument and manually check if that argument - /// and in our own consumer code handle the fact that both `--save-context` - /// and `--save-runtime` *should* have been used. But again this is error - /// prone and tedious. If we had code relying on checking `--save-context` - /// and we forgot to update that code to *also* check `--save-all` it'd mean - /// an error! - /// - /// Luckily we can use [`Command::replace`] so that when the user types - /// `--save-all`, `clap` will replace that argument with `--save-context - /// --save-runtime`, and parsing will continue like normal. Now all our code - /// that was originally checking for things like `--save-context` doesn't - /// need to change! - /// - /// ```rust - /// # use clap::{Command, Arg, ArgAction}; - /// let m = Command::new("cmd") - /// .arg(Arg::new("save-context") - /// .long("save-context") - /// .action(ArgAction::SetTrue)) - /// .arg(Arg::new("save-runtime") - /// .long("save-runtime") - /// .action(ArgAction::SetTrue)) - /// .replace("--save-all", &["--save-context", "--save-runtime"]) - /// .get_matches_from(vec!["cmd", "--save-all"]); - /// - /// assert!(*m.get_one::<bool>("save-context").expect("defaulted by clap")); - /// assert!(*m.get_one::<bool>("save-runtime").expect("defaulted by clap")); - /// ``` - /// - /// This can also be used with options, for example if our application with - /// `--save-*` above also had a `--format=TYPE` option. Let's say it - /// accepted `txt` or `json` values. However, when `--save-all` is used, - /// only `--format=json` is allowed, or valid. We could change the example - /// above to enforce this: - /// - /// ```rust - /// # use clap::{Command, Arg, ArgAction}; - /// let m = Command::new("cmd") - /// .arg(Arg::new("save-context") - /// .long("save-context") - /// .action(ArgAction::SetTrue)) - /// .arg(Arg::new("save-runtime") - /// .long("save-runtime") - /// .action(ArgAction::SetTrue)) - /// .arg(Arg::new("format") - /// .long("format") - /// .takes_value(true) - /// .value_parser(["txt", "json"])) - /// .replace("--save-all", &["--save-context", "--save-runtime", "--format=json"]) - /// .get_matches_from(vec!["cmd", "--save-all"]); - /// - /// assert!(*m.get_one::<bool>("save-context").expect("defaulted by clap")); - /// assert!(*m.get_one::<bool>("save-runtime").expect("defaulted by clap")); - /// assert_eq!(m.value_of("format"), Some("json")); - /// ``` - /// - /// [`App::replace`]: Command::replace() - #[inline] - #[cfg(feature = "unstable-replace")] - #[must_use] - pub fn replace(mut self, name: &'help str, target: &'help [&'help str]) -> Self { - self.replacers.insert(name, target); - self - } - - /// Exit gracefully if no arguments are present (e.g. `$ myprog`). - /// - /// **NOTE:** [`subcommands`] count as arguments - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command}; - /// Command::new("myprog") - /// .arg_required_else_help(true); - /// ``` - /// - /// [`subcommands`]: crate::Command::subcommand() - /// [`Arg::default_value`]: crate::Arg::default_value() - #[inline] - pub fn arg_required_else_help(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::ArgRequiredElseHelp) - } else { - self.unset_setting(AppSettings::ArgRequiredElseHelp) - } - } - - /// Specifies that leading hyphens are allowed in all argument *values* (e.g. `-10`). - /// - /// Otherwise they will be parsed as another flag or option. See also - /// [`Command::allow_negative_numbers`]. - /// - /// **NOTE:** Use this setting with caution as it silences certain circumstances which would - /// otherwise be an error (such as accidentally forgetting to specify a value for leading - /// option). It is preferred to set this on a per argument basis, via [`Arg::allow_hyphen_values`]. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Arg, Command}; - /// // Imagine you needed to represent negative numbers as well, such as -10 - /// let m = Command::new("nums") - /// .allow_hyphen_values(true) - /// .arg(Arg::new("neg")) - /// .get_matches_from(vec![ - /// "nums", "-20" - /// ]); - /// - /// assert_eq!(m.value_of("neg"), Some("-20")); - /// # ; - /// ``` - /// [`Arg::allow_hyphen_values`]: crate::Arg::allow_hyphen_values() - #[inline] - pub fn allow_hyphen_values(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::AllowHyphenValues) - } else { - self.unset_setting(AppSettings::AllowHyphenValues) - } - } - - /// Allows negative numbers to pass as values. - /// - /// This is similar to [`Command::allow_hyphen_values`] except that it only allows numbers, - /// all other undefined leading hyphens will fail to parse. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let res = Command::new("myprog") - /// .allow_negative_numbers(true) - /// .arg(Arg::new("num")) - /// .try_get_matches_from(vec![ - /// "myprog", "-20" - /// ]); - /// assert!(res.is_ok()); - /// let m = res.unwrap(); - /// assert_eq!(m.value_of("num").unwrap(), "-20"); - /// ``` - #[inline] - pub fn allow_negative_numbers(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::AllowNegativeNumbers) - } else { - self.unset_setting(AppSettings::AllowNegativeNumbers) - } - } - - /// Specifies that the final positional argument is a "VarArg" and that `clap` should not - /// attempt to parse any further args. - /// - /// The values of the trailing positional argument will contain all args from itself on. - /// - /// **NOTE:** The final positional argument **must** have [`Arg::multiple_values(true)`] or the usage - /// string equivalent. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, arg}; - /// let m = Command::new("myprog") - /// .trailing_var_arg(true) - /// .arg(arg!(<cmd> ... "commands to run")) - /// .get_matches_from(vec!["myprog", "arg1", "-r", "val1"]); - /// - /// let trail: Vec<&str> = m.values_of("cmd").unwrap().collect(); - /// assert_eq!(trail, ["arg1", "-r", "val1"]); - /// ``` - /// [`Arg::multiple_values(true)`]: crate::Arg::multiple_values() - pub fn trailing_var_arg(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::TrailingVarArg) - } else { - self.unset_setting(AppSettings::TrailingVarArg) - } - } - - /// Allows one to implement two styles of CLIs where positionals can be used out of order. - /// - /// The first example is a CLI where the second to last positional argument is optional, but - /// the final positional argument is required. Such as `$ prog [optional] <required>` where one - /// of the two following usages is allowed: - /// - /// * `$ prog [optional] <required>` - /// * `$ prog <required>` - /// - /// This would otherwise not be allowed. This is useful when `[optional]` has a default value. - /// - /// **Note:** when using this style of "missing positionals" the final positional *must* be - /// [required] if `--` will not be used to skip to the final positional argument. - /// - /// **Note:** This style also only allows a single positional argument to be "skipped" without - /// the use of `--`. To skip more than one, see the second example. - /// - /// The second example is when one wants to skip multiple optional positional arguments, and use - /// of the `--` operator is OK (but not required if all arguments will be specified anyways). - /// - /// For example, imagine a CLI which has three positional arguments `[foo] [bar] [baz]...` where - /// `baz` accepts multiple values (similar to man `ARGS...` style training arguments). - /// - /// With this setting the following invocations are posisble: - /// - /// * `$ prog foo bar baz1 baz2 baz3` - /// * `$ prog foo -- baz1 baz2 baz3` - /// * `$ prog -- baz1 baz2 baz3` - /// - /// # Examples - /// - /// Style number one from above: - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// // Assume there is an external subcommand named "subcmd" - /// let m = Command::new("myprog") - /// .allow_missing_positional(true) - /// .arg(Arg::new("arg1")) - /// .arg(Arg::new("arg2") - /// .required(true)) - /// .get_matches_from(vec![ - /// "prog", "other" - /// ]); - /// - /// assert_eq!(m.value_of("arg1"), None); - /// assert_eq!(m.value_of("arg2"), Some("other")); - /// ``` - /// - /// Now the same example, but using a default value for the first optional positional argument - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// // Assume there is an external subcommand named "subcmd" - /// let m = Command::new("myprog") - /// .allow_missing_positional(true) - /// .arg(Arg::new("arg1") - /// .default_value("something")) - /// .arg(Arg::new("arg2") - /// .required(true)) - /// .get_matches_from(vec![ - /// "prog", "other" - /// ]); - /// - /// assert_eq!(m.value_of("arg1"), Some("something")); - /// assert_eq!(m.value_of("arg2"), Some("other")); - /// ``` - /// - /// Style number two from above: - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// // Assume there is an external subcommand named "subcmd" - /// let m = Command::new("myprog") - /// .allow_missing_positional(true) - /// .arg(Arg::new("foo")) - /// .arg(Arg::new("bar")) - /// .arg(Arg::new("baz").takes_value(true).multiple_values(true)) - /// .get_matches_from(vec![ - /// "prog", "foo", "bar", "baz1", "baz2", "baz3" - /// ]); - /// - /// assert_eq!(m.value_of("foo"), Some("foo")); - /// assert_eq!(m.value_of("bar"), Some("bar")); - /// assert_eq!(m.values_of("baz").unwrap().collect::<Vec<_>>(), &["baz1", "baz2", "baz3"]); - /// ``` - /// - /// Now nofice if we don't specify `foo` or `baz` but use the `--` operator. - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// // Assume there is an external subcommand named "subcmd" - /// let m = Command::new("myprog") - /// .allow_missing_positional(true) - /// .arg(Arg::new("foo")) - /// .arg(Arg::new("bar")) - /// .arg(Arg::new("baz").takes_value(true).multiple_values(true)) - /// .get_matches_from(vec![ - /// "prog", "--", "baz1", "baz2", "baz3" - /// ]); - /// - /// assert_eq!(m.value_of("foo"), None); - /// assert_eq!(m.value_of("bar"), None); - /// assert_eq!(m.values_of("baz").unwrap().collect::<Vec<_>>(), &["baz1", "baz2", "baz3"]); - /// ``` - /// - /// [required]: crate::Arg::required() - #[inline] - pub fn allow_missing_positional(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::AllowMissingPositional) - } else { - self.unset_setting(AppSettings::AllowMissingPositional) - } - } -} - -/// # Subcommand-specific Settings -impl<'help> App<'help> { - /// Sets the short version of the subcommand flag without the preceding `-`. - /// - /// Allows the subcommand to be used as if it were an [`Arg::short`]. - /// - /// # Examples - /// - /// ``` - /// # use clap::{Command, Arg, ArgAction}; - /// let matches = Command::new("pacman") - /// .subcommand( - /// Command::new("sync").short_flag('S').arg( - /// Arg::new("search") - /// .short('s') - /// .long("search") - /// .action(ArgAction::SetTrue) - /// .help("search remote repositories for matching strings"), - /// ), - /// ) - /// .get_matches_from(vec!["pacman", "-Ss"]); - /// - /// assert_eq!(matches.subcommand_name().unwrap(), "sync"); - /// let sync_matches = matches.subcommand_matches("sync").unwrap(); - /// assert!(*sync_matches.get_one::<bool>("search").expect("defaulted by clap")); - /// ``` - /// [`Arg::short`]: Arg::short() - #[must_use] - pub fn short_flag(mut self, short: char) -> Self { - self.short_flag = Some(short); - self - } - - /// Sets the long version of the subcommand flag without the preceding `--`. - /// - /// Allows the subcommand to be used as if it were an [`Arg::long`]. - /// - /// **NOTE:** Any leading `-` characters will be stripped. - /// - /// # Examples - /// - /// To set `long_flag` use a word containing valid UTF-8 codepoints. If you supply a double leading - /// `--` such as `--sync` they will be stripped. Hyphens in the middle of the word; however, - /// will *not* be stripped (i.e. `sync-file` is allowed). - /// - /// ``` - /// # use clap::{Command, Arg, ArgAction}; - /// let matches = Command::new("pacman") - /// .subcommand( - /// Command::new("sync").long_flag("sync").arg( - /// Arg::new("search") - /// .short('s') - /// .long("search") - /// .action(ArgAction::SetTrue) - /// .help("search remote repositories for matching strings"), - /// ), - /// ) - /// .get_matches_from(vec!["pacman", "--sync", "--search"]); - /// - /// assert_eq!(matches.subcommand_name().unwrap(), "sync"); - /// let sync_matches = matches.subcommand_matches("sync").unwrap(); - /// assert!(*sync_matches.get_one::<bool>("search").expect("defaulted by clap")); - /// ``` - /// - /// [`Arg::long`]: Arg::long() - #[must_use] - pub fn long_flag(mut self, long: &'help str) -> Self { - #[cfg(feature = "unstable-v4")] - { - self.long_flag = Some(long); - } - #[cfg(not(feature = "unstable-v4"))] - { - self.long_flag = Some(long.trim_start_matches(|c| c == '-')); - } - self - } - - /// Sets a hidden alias to this subcommand. - /// - /// This allows the subcommand to be accessed via *either* the original name, or this given - /// alias. This is more efficient and easier than creating multiple hidden subcommands as one - /// only needs to check for the existence of this command, and not all aliased variants. - /// - /// **NOTE:** Aliases defined with this method are *hidden* from the help - /// message. If you're looking for aliases that will be displayed in the help - /// message, see [`Command::visible_alias`]. - /// - /// **NOTE:** When using aliases and checking for the existence of a - /// particular subcommand within an [`ArgMatches`] struct, one only needs to - /// search for the original name and not all aliases. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test") - /// .alias("do-stuff")) - /// .get_matches_from(vec!["myprog", "do-stuff"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - /// [`App::visible_alias`]: Command::visible_alias() - #[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 "hidden" short flag subcommand - /// - /// This will automatically dispatch as if this subcommand was used. This is more efficient, - /// and easier than creating multiple hidden subcommands as one only needs to check for the - /// existence of this command, and not all variants. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test").short_flag('t') - /// .short_flag_alias('d')) - /// .get_matches_from(vec!["myprog", "-d"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - #[must_use] - pub fn short_flag_alias(mut self, name: char) -> Self { - assert!(name != '-', "short alias name cannot be `-`"); - self.short_flag_aliases.push((name, false)); - self - } - - /// Add an alias, which functions as a "hidden" long flag subcommand. - /// - /// This will automatically dispatch as if this subcommand was used. This is more efficient, - /// and easier than creating multiple hidden subcommands as one only needs to check for the - /// existence of this command, and not all variants. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test").long_flag("test") - /// .long_flag_alias("testing")) - /// .get_matches_from(vec!["myprog", "--testing"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - #[must_use] - pub fn long_flag_alias(mut self, name: &'help str) -> Self { - self.long_flag_aliases.push((name, false)); - self - } - - /// Sets multiple hidden aliases to this subcommand. - /// - /// This allows the subcommand to be accessed via *either* the original name or any of the - /// given aliases. This is more efficient, and easier than creating multiple hidden subcommands - /// as one only needs to check for the existence of this command and not all aliased variants. - /// - /// **NOTE:** Aliases defined with this method are *hidden* from the help - /// message. If looking for aliases that will be displayed in the help - /// message, see [`Command::visible_aliases`]. - /// - /// **NOTE:** When using aliases and checking for the existence of a - /// particular subcommand within an [`ArgMatches`] struct, one only needs to - /// search for the original name and not all aliases. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test") - /// .aliases(&["do-stuff", "do-tests", "tests"])) - /// .arg(Arg::new("input") - /// .help("the file to add") - /// .required(false)) - /// .get_matches_from(vec!["myprog", "do-tests"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - /// [`App::visible_aliases`]: Command::visible_aliases() - #[must_use] - pub fn aliases(mut self, names: &[&'help str]) -> Self { - self.aliases.extend(names.iter().map(|n| (*n, false))); - self - } - - /// Add aliases, which function as "hidden" short flag subcommands. - /// - /// These will automatically dispatch as if this subcommand was used. This is more efficient, - /// and easier than creating multiple hidden subcommands as one only needs to check for the - /// existence of this command, and not all variants. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test").short_flag('t') - /// .short_flag_aliases(&['a', 'b', 'c'])) - /// .arg(Arg::new("input") - /// .help("the file to add") - /// .required(false)) - /// .get_matches_from(vec!["myprog", "-a"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - #[must_use] - pub fn short_flag_aliases(mut self, names: &[char]) -> Self { - for s in names { - assert!(s != &'-', "short alias name cannot be `-`"); - self.short_flag_aliases.push((*s, false)); - } - self - } - - /// Add aliases, which function as "hidden" long flag subcommands. - /// - /// These will automatically dispatch as if this subcommand was used. This is more efficient, - /// and easier than creating multiple hidden subcommands as one only needs to check for the - /// existence of this command, and not all variants. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test").long_flag("test") - /// .long_flag_aliases(&["testing", "testall", "test_all"])) - /// .arg(Arg::new("input") - /// .help("the file to add") - /// .required(false)) - /// .get_matches_from(vec!["myprog", "--testing"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - #[must_use] - pub fn long_flag_aliases(mut self, names: &[&'help str]) -> Self { - for s in names { - self.long_flag_aliases.push((s, false)); - } - self - } - - /// Sets a visible alias to this subcommand. - /// - /// This allows the subcommand to be accessed via *either* the - /// original name or the given alias. This is more efficient and easier - /// than creating hidden subcommands as one only needs to check for - /// the existence of this command and not all aliased variants. - /// - /// **NOTE:** The alias defined with this method is *visible* from the help - /// message and displayed as if it were just another regular subcommand. If - /// looking for an alias that will not be displayed in the help message, see - /// [`Command::alias`]. - /// - /// **NOTE:** When using aliases and checking for the existence of a - /// particular subcommand within an [`ArgMatches`] struct, one only needs to - /// search for the original name and not all aliases. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test") - /// .visible_alias("do-stuff")) - /// .get_matches_from(vec!["myprog", "do-stuff"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - /// [`App::alias`]: Command::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 "visible" short flag subcommand - /// - /// This will automatically dispatch as if this subcommand was used. This is more efficient, - /// and easier than creating multiple hidden subcommands as one only needs to check for the - /// existence of this command, and not all variants. - /// - /// See also [`Command::short_flag_alias`]. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test").short_flag('t') - /// .visible_short_flag_alias('d')) - /// .get_matches_from(vec!["myprog", "-d"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - /// [`App::short_flag_alias`]: Command::short_flag_alias() - #[must_use] - pub fn visible_short_flag_alias(mut self, name: char) -> Self { - assert!(name != '-', "short alias name cannot be `-`"); - self.short_flag_aliases.push((name, true)); - self - } - - /// Add an alias, which functions as a "visible" long flag subcommand. - /// - /// This will automatically dispatch as if this subcommand was used. This is more efficient, - /// and easier than creating multiple hidden subcommands as one only needs to check for the - /// existence of this command, and not all variants. - /// - /// See also [`Command::long_flag_alias`]. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test").long_flag("test") - /// .visible_long_flag_alias("testing")) - /// .get_matches_from(vec!["myprog", "--testing"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - /// [`App::long_flag_alias`]: Command::long_flag_alias() - #[must_use] - pub fn visible_long_flag_alias(mut self, name: &'help str) -> Self { - self.long_flag_aliases.push((name, true)); - self - } - - /// Sets multiple visible aliases to this subcommand. - /// - /// This allows the subcommand to be accessed via *either* the - /// original name or any of the given aliases. This is more efficient and easier - /// than creating multiple hidden subcommands as one only needs to check for - /// the existence of this command and not all aliased variants. - /// - /// **NOTE:** The alias defined with this method is *visible* from the help - /// message and displayed as if it were just another regular subcommand. If - /// looking for an alias that will not be displayed in the help message, see - /// [`Command::alias`]. - /// - /// **NOTE:** When using aliases, and checking for the existence of a - /// particular subcommand within an [`ArgMatches`] struct, one only needs to - /// search for the original name and not all aliases. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test") - /// .visible_aliases(&["do-stuff", "tests"])) - /// .get_matches_from(vec!["myprog", "do-stuff"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - /// [`App::alias`]: Command::alias() - #[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 flag subcommands. - /// - /// See [`Command::short_flag_aliases`]. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test").short_flag('b') - /// .visible_short_flag_aliases(&['t'])) - /// .get_matches_from(vec!["myprog", "-t"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - /// [`App::short_flag_aliases`]: Command::short_flag_aliases() - #[must_use] - pub fn visible_short_flag_aliases(mut self, names: &[char]) -> Self { - for s in names { - assert!(s != &'-', "short alias name cannot be `-`"); - self.short_flag_aliases.push((*s, true)); - } - self - } - - /// Add aliases, which function as *visible* long flag subcommands. - /// - /// See [`Command::long_flag_aliases`]. - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg, }; - /// let m = Command::new("myprog") - /// .subcommand(Command::new("test").long_flag("test") - /// .visible_long_flag_aliases(&["testing", "testall", "test_all"])) - /// .get_matches_from(vec!["myprog", "--testing"]); - /// assert_eq!(m.subcommand_name(), Some("test")); - /// ``` - /// [`App::long_flag_aliases`]: Command::long_flag_aliases() - #[must_use] - pub fn visible_long_flag_aliases(mut self, names: &[&'help str]) -> Self { - for s in names { - self.long_flag_aliases.push((s, true)); - } - self - } - - /// Set the placement of this subcommand within the help. - /// - /// Subcommands with a lower value will be displayed first in the help message. Subcommands - /// with duplicate display orders will be displayed in alphabetical order. - /// - /// This is helpful when one would like to emphasize frequently used subcommands, or prioritize - /// those towards the top of the list. - /// - /// **NOTE:** The default is 999 for all subcommands. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, }; - /// let m = Command::new("cust-ord") - /// .subcommand(Command::new("alpha") // typically subcommands are grouped - /// // alphabetically by name. Subcommands - /// // without a display_order have a value of - /// // 999 and are displayed alphabetically with - /// // all other 999 subcommands - /// .about("Some help and text")) - /// .subcommand(Command::new("beta") - /// .display_order(1) // In order to force this subcommand to appear *first* - /// // all we have to do is give it a value lower than 999. - /// // Any other subcommands with a value of 1 will be displayed - /// // alphabetically with this one...then 2 values, then 3, etc. - /// .about("I should be first!")) - /// .get_matches_from(vec![ - /// "cust-ord", "--help" - /// ]); - /// ``` - /// - /// The above example displays the following help message - /// - /// ```text - /// cust-ord - /// - /// USAGE: - /// cust-ord [OPTIONS] - /// - /// OPTIONS: - /// -h, --help Print help information - /// -V, --version Print version information - /// - /// SUBCOMMANDS: - /// beta I should be first! - /// alpha Some help and text - /// ``` - #[inline] - #[must_use] - pub fn display_order(mut self, ord: usize) -> Self { - self.disp_ord = Some(ord); - self - } - - /// Specifies that this [`subcommand`] should be hidden from help messages - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .subcommand( - /// Command::new("test").hide(true) - /// ) - /// # ; - /// ``` - /// - /// [`subcommand`]: crate::Command::subcommand() - #[inline] - pub fn hide(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::Hidden) - } else { - self.unset_setting(AppSettings::Hidden) - } - } - - /// If no [`subcommand`] is present at runtime, error and exit gracefully. - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, ErrorKind}; - /// let err = Command::new("myprog") - /// .subcommand_required(true) - /// .subcommand(Command::new("test")) - /// .try_get_matches_from(vec![ - /// "myprog", - /// ]); - /// assert!(err.is_err()); - /// assert_eq!(err.unwrap_err().kind(), ErrorKind::MissingSubcommand); - /// # ; - /// ``` - /// - /// [`subcommand`]: crate::Command::subcommand() - pub fn subcommand_required(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::SubcommandRequired) - } else { - self.unset_setting(AppSettings::SubcommandRequired) - } - } - - /// Assume unexpected positional arguments are a [`subcommand`]. - /// - /// Arguments will be stored in the `""` argument in the [`ArgMatches`] - /// - /// **NOTE:** Use this setting with caution, - /// as a truly unexpected argument (i.e. one that is *NOT* an external subcommand) - /// will **not** cause an error and instead be treated as a potential subcommand. - /// One should check for such cases manually and inform the user appropriately. - /// - /// **NOTE:** A built-in subcommand will be parsed as an external subcommand when escaped with - /// `--`. - /// - /// # Examples - /// - /// ```rust - /// # use clap::Command; - /// // Assume there is an external subcommand named "subcmd" - /// let m = Command::new("myprog") - /// .allow_external_subcommands(true) - /// .get_matches_from(vec![ - /// "myprog", "subcmd", "--option", "value", "-fff", "--flag" - /// ]); - /// - /// // All trailing arguments will be stored under the subcommand's sub-matches using an empty - /// // string argument name - /// match m.subcommand() { - /// Some((external, ext_m)) => { - /// let ext_args: Vec<&str> = ext_m.values_of("").unwrap().collect(); - /// assert_eq!(external, "subcmd"); - /// assert_eq!(ext_args, ["--option", "value", "-fff", "--flag"]); - /// }, - /// _ => {}, - /// } - /// ``` - /// - /// [`subcommand`]: crate::Command::subcommand() - /// [`ArgMatches`]: crate::ArgMatches - /// [`ErrorKind::UnknownArgument`]: crate::ErrorKind::UnknownArgument - pub fn allow_external_subcommands(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::AllowExternalSubcommands) - } else { - self.unset_setting(AppSettings::AllowExternalSubcommands) - } - } - - /// Specifies that external subcommands that are invalid UTF-8 should *not* be treated as an error. - /// - /// **NOTE:** Using external subcommand argument values with invalid UTF-8 requires using - /// [`ArgMatches::values_of_os`] or [`ArgMatches::values_of_lossy`] for those particular - /// arguments which may contain invalid UTF-8 values - /// - /// **NOTE:** Setting this requires [`Command::allow_external_subcommands`] - /// - /// # Platform Specific - /// - /// Non Windows systems only - /// - /// # Examples - /// - #[cfg_attr(not(unix), doc = " ```ignore")] - #[cfg_attr(unix, doc = " ```")] - /// # use clap::Command; - /// // Assume there is an external subcommand named "subcmd" - /// let m = Command::new("myprog") - /// .allow_invalid_utf8_for_external_subcommands(true) - /// .allow_external_subcommands(true) - /// .get_matches_from(vec![ - /// "myprog", "subcmd", "--option", "value", "-fff", "--flag" - /// ]); - /// - /// // All trailing arguments will be stored under the subcommand's sub-matches using an empty - /// // string argument name - /// match m.subcommand() { - /// Some((external, ext_m)) => { - /// let ext_args: Vec<&std::ffi::OsStr> = ext_m.values_of_os("").unwrap().collect(); - /// assert_eq!(external, "subcmd"); - /// assert_eq!(ext_args, ["--option", "value", "-fff", "--flag"]); - /// }, - /// _ => {}, - /// } - /// ``` - /// - /// [`ArgMatches::values_of_os`]: crate::ArgMatches::values_of_os() - /// [`ArgMatches::values_of_lossy`]: crate::ArgMatches::values_of_lossy() - /// [`subcommands`]: crate::Command::subcommand() - pub fn allow_invalid_utf8_for_external_subcommands(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::AllowInvalidUtf8ForExternalSubcommands) - } else { - self.unset_setting(AppSettings::AllowInvalidUtf8ForExternalSubcommands) - } - } - - /// Specifies that use of an argument prevents the use of [`subcommands`]. - /// - /// By default `clap` allows arguments between subcommands such - /// as `<cmd> [cmd_args] <subcmd> [subcmd_args] <subsubcmd> [subsubcmd_args]`. - /// - /// This setting disables that functionality and says that arguments can - /// only follow the *final* subcommand. For instance using this setting - /// makes only the following invocations possible: - /// - /// * `<cmd> <subcmd> <subsubcmd> [subsubcmd_args]` - /// * `<cmd> <subcmd> [subcmd_args]` - /// * `<cmd> [cmd_args]` - /// - /// # Examples - /// - /// ```rust - /// # use clap::Command; - /// Command::new("myprog") - /// .args_conflicts_with_subcommands(true); - /// ``` - /// - /// [`subcommands`]: crate::Command::subcommand() - pub fn args_conflicts_with_subcommands(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::ArgsNegateSubcommands) - } else { - self.unset_setting(AppSettings::ArgsNegateSubcommands) - } - } - - /// Prevent subcommands from being consumed as an arguments value. - /// - /// By default, if an option taking multiple values is followed by a subcommand, the - /// subcommand will be parsed as another value. - /// - /// ```text - /// cmd --foo val1 val2 subcommand - /// --------- ---------- - /// values another value - /// ``` - /// - /// This setting instructs the parser to stop when encountering a subcommand instead of - /// greedily consuming arguments. - /// - /// ```text - /// cmd --foo val1 val2 subcommand - /// --------- ---------- - /// values subcommand - /// ``` - /// - /// **Note:** Make sure you apply it as `global_setting` if you want this setting - /// to be propagated to subcommands and sub-subcommands! - /// - /// # Examples - /// - /// ```rust - /// # use clap::{Command, Arg}; - /// let cmd = Command::new("cmd").subcommand(Command::new("sub")).arg( - /// Arg::new("arg") - /// .long("arg") - /// .multiple_values(true) - /// .takes_value(true), - /// ); - /// - /// let matches = cmd - /// .clone() - /// .try_get_matches_from(&["cmd", "--arg", "1", "2", "3", "sub"]) - /// .unwrap(); - /// assert_eq!( - /// matches.values_of("arg").unwrap().collect::<Vec<_>>(), - /// &["1", "2", "3", "sub"] - /// ); - /// assert!(matches.subcommand_matches("sub").is_none()); - /// - /// let matches = cmd - /// .subcommand_precedence_over_arg(true) - /// .try_get_matches_from(&["cmd", "--arg", "1", "2", "3", "sub"]) - /// .unwrap(); - /// assert_eq!( - /// matches.values_of("arg").unwrap().collect::<Vec<_>>(), - /// &["1", "2", "3"] - /// ); - /// assert!(matches.subcommand_matches("sub").is_some()); - /// ``` - pub fn subcommand_precedence_over_arg(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::SubcommandPrecedenceOverArg) - } else { - self.unset_setting(AppSettings::SubcommandPrecedenceOverArg) - } - } - - /// Allows [`subcommands`] to override all requirements of the parent command. - /// - /// For example, if you had a subcommand or top level application with a required argument - /// that is only required as long as there is no subcommand present, - /// using this setting would allow you to set those arguments to [`Arg::required(true)`] - /// and yet receive no error so long as the user uses a valid subcommand instead. - /// - /// **NOTE:** This defaults to false (using subcommand does *not* negate requirements) - /// - /// # Examples - /// - /// This first example shows that it is an error to not use a required argument - /// - /// ```rust - /// # use clap::{Command, Arg, ErrorKind}; - /// let err = Command::new("myprog") - /// .subcommand_negates_reqs(true) - /// .arg(Arg::new("opt").required(true)) - /// .subcommand(Command::new("test")) - /// .try_get_matches_from(vec![ - /// "myprog" - /// ]); - /// assert!(err.is_err()); - /// assert_eq!(err.unwrap_err().kind(), ErrorKind::MissingRequiredArgument); - /// # ; - /// ``` - /// - /// This next example shows that it is no longer error to not use a required argument if a - /// valid subcommand is used. - /// - /// ```rust - /// # use clap::{Command, Arg, ErrorKind}; - /// let noerr = Command::new("myprog") - /// .subcommand_negates_reqs(true) - /// .arg(Arg::new("opt").required(true)) - /// .subcommand(Command::new("test")) - /// .try_get_matches_from(vec![ - /// "myprog", "test" - /// ]); - /// assert!(noerr.is_ok()); - /// # ; - /// ``` - /// - /// [`Arg::required(true)`]: crate::Arg::required() - /// [`subcommands`]: crate::Command::subcommand() - pub fn subcommand_negates_reqs(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::SubcommandsNegateReqs) - } else { - self.unset_setting(AppSettings::SubcommandsNegateReqs) - } - } - - /// Multiple-personality program dispatched on the binary name (`argv[0]`) - /// - /// A "multicall" executable is a single executable - /// that contains a variety of applets, - /// and decides which applet to run based on the name of the file. - /// The executable can be called from different names by creating hard links - /// or symbolic links to it. - /// - /// This is desirable for: - /// - Easy distribution, a single binary that can install hardlinks to access the different - /// personalities. - /// - Minimal binary size by sharing common code (e.g. standard library, clap) - /// - Custom shells or REPLs where there isn't a single top-level command - /// - /// Setting `multicall` will cause - /// - `argv[0]` to be stripped to the base name and parsed as the first argument, as if - /// [`Command::no_binary_name`][App::no_binary_name] was set. - /// - Help and errors to report subcommands as if they were the top-level command - /// - /// When the subcommand is not present, there are several strategies you may employ, depending - /// on your needs: - /// - Let the error percolate up normally - /// - Print a specialized error message using the - /// [`Error::context`][crate::Error::context] - /// - Print the [help][App::write_help] but this might be ambiguous - /// - Disable `multicall` and re-parse it - /// - Disable `multicall` and re-parse it with a specific subcommand - /// - /// When detecting the error condition, the [`ErrorKind`] isn't sufficient as a sub-subcommand - /// might report the same error. Enable - /// [`allow_external_subcommands`][App::allow_external_subcommands] if you want to specifically - /// get the unrecognized binary name. - /// - /// **NOTE:** Multicall can't be used with [`no_binary_name`] since they interpret - /// the command name in incompatible ways. - /// - /// **NOTE:** The multicall command cannot have arguments. - /// - /// **NOTE:** Applets are slightly semantically different from subcommands, - /// so it's recommended to use [`Command::subcommand_help_heading`] and - /// [`Command::subcommand_value_name`] to change the descriptive text as above. - /// - /// # Examples - /// - /// `hostname` is an example of a multicall executable. - /// Both `hostname` and `dnsdomainname` are provided by the same executable - /// and which behaviour to use is based on the executable file name. - /// - /// This is desirable when the executable has a primary purpose - /// but there is related functionality that would be convenient to provide - /// and implement it to be in the same executable. - /// - /// The name of the cmd is essentially unused - /// and may be the same as the name of a subcommand. - /// - /// The names of the immediate subcommands of the Command - /// are matched against the basename of the first argument, - /// which is conventionally the path of the executable. - /// - /// This does not allow the subcommand to be passed as the first non-path argument. - /// - /// ```rust - /// # use clap::{Command, ErrorKind}; - /// let mut cmd = Command::new("hostname") - /// .multicall(true) - /// .subcommand(Command::new("hostname")) - /// .subcommand(Command::new("dnsdomainname")); - /// let m = cmd.try_get_matches_from_mut(&["/usr/bin/hostname", "dnsdomainname"]); - /// assert!(m.is_err()); - /// assert_eq!(m.unwrap_err().kind(), ErrorKind::UnknownArgument); - /// let m = cmd.get_matches_from(&["/usr/bin/dnsdomainname"]); - /// assert_eq!(m.subcommand_name(), Some("dnsdomainname")); - /// ``` - /// - /// Busybox is another common example of a multicall executable - /// with a subcommmand for each applet that can be run directly, - /// e.g. with the `cat` applet being run by running `busybox cat`, - /// or with `cat` as a link to the `busybox` binary. - /// - /// This is desirable when the launcher program has additional options - /// or it is useful to run the applet without installing a symlink - /// e.g. to test the applet without installing it - /// or there may already be a command of that name installed. - /// - /// To make an applet usable as both a multicall link and a subcommand - /// the subcommands must be defined both in the top-level Command - /// and as subcommands of the "main" applet. - /// - /// ```rust - /// # use clap::Command; - /// fn applet_commands() -> [Command<'static>; 2] { - /// [Command::new("true"), Command::new("false")] - /// } - /// let mut cmd = Command::new("busybox") - /// .multicall(true) - /// .subcommand( - /// Command::new("busybox") - /// .subcommand_value_name("APPLET") - /// .subcommand_help_heading("APPLETS") - /// .subcommands(applet_commands()), - /// ) - /// .subcommands(applet_commands()); - /// // When called from the executable's canonical name - /// // its applets can be matched as subcommands. - /// let m = cmd.try_get_matches_from_mut(&["/usr/bin/busybox", "true"]).unwrap(); - /// assert_eq!(m.subcommand_name(), Some("busybox")); - /// assert_eq!(m.subcommand().unwrap().1.subcommand_name(), Some("true")); - /// // When called from a link named after an applet that applet is matched. - /// let m = cmd.get_matches_from(&["/usr/bin/true"]); - /// assert_eq!(m.subcommand_name(), Some("true")); - /// ``` - /// - /// [`no_binary_name`]: crate::Command::no_binary_name - /// [`App::subcommand_value_name`]: crate::Command::subcommand_value_name - /// [`App::subcommand_help_heading`]: crate::Command::subcommand_help_heading - #[inline] - pub fn multicall(self, yes: bool) -> Self { - if yes { - self.setting(AppSettings::Multicall) - } else { - self.unset_setting(AppSettings::Multicall) - } - } - - /// Sets the value name used for subcommands when printing usage and help. - /// - /// By default, this is "SUBCOMMAND". - /// - /// See also [`Command::subcommand_help_heading`] - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .subcommand(Command::new("sub1")) - /// .print_help() - /// # ; - /// ``` - /// - /// will produce - /// - /// ```text - /// myprog - /// - /// USAGE: - /// myprog [SUBCOMMAND] - /// - /// OPTIONS: - /// -h, --help Print help information - /// -V, --version Print version information - /// - /// SUBCOMMANDS: - /// help Print this message or the help of the given subcommand(s) - /// sub1 - /// ``` - /// - /// but usage of `subcommand_value_name` - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .subcommand(Command::new("sub1")) - /// .subcommand_value_name("THING") - /// .print_help() - /// # ; - /// ``` - /// - /// will produce - /// - /// ```text - /// myprog - /// - /// USAGE: - /// myprog [THING] - /// - /// OPTIONS: - /// -h, --help Print help information - /// -V, --version Print version information - /// - /// SUBCOMMANDS: - /// help Print this message or the help of the given subcommand(s) - /// sub1 - /// ``` - #[must_use] - pub fn subcommand_value_name<S>(mut self, value_name: S) -> Self - where - S: Into<&'help str>, - { - self.subcommand_value_name = Some(value_name.into()); - self - } - - /// Sets the help heading used for subcommands when printing usage and help. - /// - /// By default, this is "SUBCOMMANDS". - /// - /// See also [`Command::subcommand_value_name`] - /// - /// # Examples - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .subcommand(Command::new("sub1")) - /// .print_help() - /// # ; - /// ``` - /// - /// will produce - /// - /// ```text - /// myprog - /// - /// USAGE: - /// myprog [SUBCOMMAND] - /// - /// OPTIONS: - /// -h, --help Print help information - /// -V, --version Print version information - /// - /// SUBCOMMANDS: - /// help Print this message or the help of the given subcommand(s) - /// sub1 - /// ``` - /// - /// but usage of `subcommand_help_heading` - /// - /// ```no_run - /// # use clap::{Command, Arg}; - /// Command::new("myprog") - /// .subcommand(Command::new("sub1")) - /// .subcommand_help_heading("THINGS") - /// .print_help() - /// # ; - /// ``` - /// - /// will produce - /// - /// ```text - /// myprog - /// - /// USAGE: - /// myprog [SUBCOMMAND] - /// - /// OPTIONS: - /// -h, --help Print help information - /// -V, --version Print version information - /// - /// THINGS: - /// help Print this message or the help of the given subcommand(s) - /// sub1 - /// ``` - #[must_use] - pub fn subcommand_help_heading<T>(mut self, heading: T) -> Self - where - T: Into<&'help str>, - { - self.subcommand_heading = Some(heading.into()); - self - } -} - -/// # Reflection -impl<'help> App<'help> { - #[inline] - pub(crate) fn get_usage_name(&self) -> Option<&str> { - self.usage_name.as_deref() - } - - /// Get the name of the binary. - #[inline] - pub fn get_display_name(&self) -> Option<&str> { - self.display_name.as_deref() - } - - /// Get the name of the binary. - #[inline] - pub fn get_bin_name(&self) -> Option<&str> { - self.bin_name.as_deref() - } - - /// Set binary name. Uses `&mut self` instead of `self`. - pub fn set_bin_name<S: Into<String>>(&mut self, name: S) { - self.bin_name = Some(name.into()); - } - - /// Get the name of the cmd. - #[inline] - pub fn get_name(&self) -> &str { - &self.name - } - - /// Get the version of the cmd. - #[inline] - pub fn get_version(&self) -> Option<&'help str> { - self.version - } - - /// Get the long version of the cmd. - #[inline] - pub fn get_long_version(&self) -> Option<&'help str> { - self.long_version - } - - /// Get the authors of the cmd. - #[inline] - pub fn get_author(&self) -> Option<&'help str> { - self.author - } - - /// Get the short flag of the subcommand. - #[inline] - pub fn get_short_flag(&self) -> Option<char> { - self.short_flag - } - - /// Get the long flag of the subcommand. - #[inline] - pub fn get_long_flag(&self) -> Option<&'help str> { - self.long_flag - } - - /// Get the help message specified via [`Command::about`]. - /// - /// [`App::about`]: Command::about() - #[inline] - pub fn get_about(&self) -> Option<&'help str> { - self.about - } - - /// Get the help message specified via [`Command::long_about`]. - /// - /// [`App::long_about`]: Command::long_about() - #[inline] - pub fn get_long_about(&self) -> Option<&'help str> { - self.long_about - } - - /// Deprecated, replaced with [`Command::get_next_help_heading`] - #[inline] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.0", note = "Replaced with `App::get_next_help_heading`") - )] - pub fn get_help_heading(&self) -> Option<&'help str> { - self.get_next_help_heading() - } - - /// Get the custom section heading specified via [`Command::help_heading`]. - /// - /// [`App::help_heading`]: Command::help_heading() - #[inline] - pub fn get_next_help_heading(&self) -> Option<&'help str> { - self.current_help_heading - } - - /// Iterate through the *visible* aliases for this subcommand. - #[inline] - pub fn get_visible_aliases(&self) -> impl Iterator<Item = &'help str> + '_ { - self.aliases.iter().filter(|(_, vis)| *vis).map(|a| a.0) - } - - /// Iterate through the *visible* short aliases for this subcommand. - #[inline] - pub fn get_visible_short_flag_aliases(&self) -> impl Iterator<Item = char> + '_ { - self.short_flag_aliases - .iter() - .filter(|(_, vis)| *vis) - .map(|a| a.0) - } - - /// Iterate through the *visible* long aliases for this subcommand. - #[inline] - pub fn get_visible_long_flag_aliases(&self) -> impl Iterator<Item = &'help str> + '_ { - self.long_flag_aliases - .iter() - .filter(|(_, vis)| *vis) - .map(|a| a.0) - } - - /// Iterate through the set of *all* the aliases for this subcommand, both visible and hidden. - #[inline] - pub fn get_all_aliases(&self) -> impl Iterator<Item = &str> + '_ { - self.aliases.iter().map(|a| a.0) - } - - /// Iterate through the set of *all* the short aliases for this subcommand, both visible and hidden. - #[inline] - pub fn get_all_short_flag_aliases(&self) -> impl Iterator<Item = char> + '_ { - self.short_flag_aliases.iter().map(|a| a.0) - } - - /// Iterate through the set of *all* the long aliases for this subcommand, both visible and hidden. - #[inline] - pub fn get_all_long_flag_aliases(&self) -> impl Iterator<Item = &'help str> + '_ { - self.long_flag_aliases.iter().map(|a| a.0) - } - - /// Check if the given [`AppSettings`] variant is currently set on the `Command`. - /// - /// This checks both [local] and [global settings]. - /// - /// [local]: Command::setting() - /// [global settings]: Command::global_setting() - #[inline] - pub fn is_set(&self, s: AppSettings) -> bool { - self.settings.is_set(s) || self.g_settings.is_set(s) - } - - /// Should we color the output? - #[inline(never)] - pub fn get_color(&self) -> ColorChoice { - debug!("Command::color: Color setting..."); - - if cfg!(feature = "color") { - #[allow(deprecated)] - if self.is_set(AppSettings::ColorNever) { - debug!("Never"); - ColorChoice::Never - } else if self.is_set(AppSettings::ColorAlways) { - debug!("Always"); - ColorChoice::Always - } else { - debug!("Auto"); - ColorChoice::Auto - } - } else { - ColorChoice::Never - } - } - - /// Iterate through the set of subcommands, getting a reference to each. - #[inline] - pub fn get_subcommands(&self) -> impl Iterator<Item = &App<'help>> { - self.subcommands.iter() - } - - /// Iterate through the set of subcommands, getting a mutable reference to each. - #[inline] - pub fn get_subcommands_mut(&mut self) -> impl Iterator<Item = &mut App<'help>> { - self.subcommands.iter_mut() - } - - /// Returns `true` if this `Command` has subcommands. - #[inline] - pub fn has_subcommands(&self) -> bool { - !self.subcommands.is_empty() - } - - /// Returns the help heading for listing subcommands. - #[inline] - pub fn get_subcommand_help_heading(&self) -> Option<&str> { - self.subcommand_heading - } - - /// Deprecated, replaced with [`App::get_subcommand_help_heading`] - #[inline] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.1.0", - note = "Replaced with `App::get_subcommand_help_heading`" - ) - )] - pub fn get_subommand_help_heading(&self) -> Option<&str> { - self.get_subcommand_help_heading() - } - - /// Returns the subcommand value name. - #[inline] - pub fn get_subcommand_value_name(&self) -> Option<&str> { - self.subcommand_value_name - } - - /// Returns the help heading for listing subcommands. - #[inline] - pub fn get_before_help(&self) -> Option<&str> { - self.before_help - } - - /// Returns the help heading for listing subcommands. - #[inline] - pub fn get_before_long_help(&self) -> Option<&str> { - self.before_long_help - } - - /// Returns the help heading for listing subcommands. - #[inline] - pub fn get_after_help(&self) -> Option<&str> { - self.after_help - } - - /// Returns the help heading for listing subcommands. - #[inline] - pub fn get_after_long_help(&self) -> Option<&str> { - self.after_long_help - } - - /// Find subcommand such that its name or one of aliases equals `name`. - /// - /// This does not recurse through subcommands of subcommands. - #[inline] - pub fn find_subcommand<T>(&self, name: &T) -> Option<&App<'help>> - where - T: PartialEq<str> + ?Sized, - { - self.get_subcommands().find(|s| s.aliases_to(name)) - } - - /// Find subcommand such that its name or one of aliases equals `name`, returning - /// a mutable reference to the subcommand. - /// - /// This does not recurse through subcommands of subcommands. - #[inline] - pub fn find_subcommand_mut<T>(&mut self, name: &T) -> Option<&mut App<'help>> - where - T: PartialEq<str> + ?Sized, - { - self.get_subcommands_mut().find(|s| s.aliases_to(name)) - } - - /// Iterate through the set of groups. - #[inline] - pub fn get_groups(&self) -> impl Iterator<Item = &ArgGroup<'help>> { - self.groups.iter() - } - - /// Iterate through the set of arguments. - #[inline] - pub fn get_arguments(&self) -> impl Iterator<Item = &Arg<'help>> { - self.args.args() - } - - /// Iterate through the *positionals* arguments. - #[inline] - pub fn get_positionals(&self) -> impl Iterator<Item = &Arg<'help>> { - self.get_arguments().filter(|a| a.is_positional()) - } - - /// Iterate through the *options*. - pub fn get_opts(&self) -> impl Iterator<Item = &Arg<'help>> { - self.get_arguments() - .filter(|a| a.is_takes_value_set() && !a.is_positional()) - } - - /// Get a list of all arguments the given argument conflicts with. - /// - /// If the provided argument is declared as global, the conflicts will be determined - /// based on the propagation rules of global arguments. - /// - /// ### Panics - /// - /// If the given arg contains a conflict with an argument that is unknown to - /// this `Command`. - pub fn get_arg_conflicts_with(&self, arg: &Arg) -> Vec<&Arg<'help>> // FIXME: This could probably have been an iterator - { - if arg.is_global_set() { - self.get_global_arg_conflicts_with(arg) - } else { - let mut result = Vec::new(); - for id in arg.blacklist.iter() { - if let Some(arg) = self.find(id) { - result.push(arg); - } else if let Some(group) = self.find_group(id) { - result.extend( - self.unroll_args_in_group(&group.id) - .iter() - .map(|id| self.find(id).expect(INTERNAL_ERROR_MSG)), - ); - } else { - panic!("Command::get_arg_conflicts_with: The passed arg conflicts with an arg unknown to the cmd"); - } - } - result - } - } - - // Get a unique list of all arguments of all commands and continuous subcommands the given argument conflicts with. - // - // This behavior follows the propagation rules of global arguments. - // It is useful for finding conflicts for arguments declared as global. - // - // ### Panics - // - // If the given arg contains a conflict with an argument that is unknown to - // this `App`. - fn get_global_arg_conflicts_with(&self, arg: &Arg) -> Vec<&Arg<'help>> // FIXME: This could probably have been an iterator - { - arg.blacklist - .iter() - .map(|id| { - self.args - .args() - .chain( - self.get_subcommands_containing(arg) - .iter() - .flat_map(|x| x.args.args()), - ) - .find(|arg| arg.id == *id) - .expect( - "Command::get_arg_conflicts_with: \ - The passed arg conflicts with an arg unknown to the cmd", - ) - }) - .collect() - } - - // Get a list of subcommands which contain the provided Argument - // - // This command will only include subcommands in its list for which the subcommands - // parent also contains the Argument. - // - // This search follows the propagation rules of global arguments. - // It is useful to finding subcommands, that have inherited a global argument. - // - // **NOTE:** In this case only Sucommand_1 will be included - // Subcommand_1 (contains Arg) - // Subcommand_1.1 (doesn't contain Arg) - // Subcommand_1.1.1 (contains Arg) - // - fn get_subcommands_containing(&self, arg: &Arg) -> Vec<&App<'help>> { - let mut vec = std::vec::Vec::new(); - for idx in 0..self.subcommands.len() { - if self.subcommands[idx].args.args().any(|ar| ar.id == arg.id) { - vec.push(&self.subcommands[idx]); - vec.append(&mut self.subcommands[idx].get_subcommands_containing(arg)); - } - } - vec - } - - /// Report whether [`Command::no_binary_name`] is set - pub fn is_no_binary_name_set(&self) -> bool { - self.is_set(AppSettings::NoBinaryName) - } - - /// Report whether [`Command::ignore_errors`] is set - pub(crate) fn is_ignore_errors_set(&self) -> bool { - self.is_set(AppSettings::IgnoreErrors) - } - - /// Report whether [`Command::dont_delimit_trailing_values`] is set - pub fn is_dont_delimit_trailing_values_set(&self) -> bool { - self.is_set(AppSettings::DontDelimitTrailingValues) - } - - /// Report whether [`Command::disable_version_flag`] is set - pub fn is_disable_version_flag_set(&self) -> bool { - self.is_set(AppSettings::DisableVersionFlag) - } - - /// Report whether [`Command::propagate_version`] is set - pub fn is_propagate_version_set(&self) -> bool { - self.is_set(AppSettings::PropagateVersion) - } - - /// Report whether [`Command::next_line_help`] is set - pub fn is_next_line_help_set(&self) -> bool { - self.is_set(AppSettings::NextLineHelp) - } - - /// Report whether [`Command::disable_help_flag`] is set - pub fn is_disable_help_flag_set(&self) -> bool { - self.is_set(AppSettings::DisableHelpFlag) - } - - /// Report whether [`Command::disable_help_subcommand`] is set - pub fn is_disable_help_subcommand_set(&self) -> bool { - self.is_set(AppSettings::DisableHelpSubcommand) - } - - /// Report whether [`Command::disable_colored_help`] is set - pub fn is_disable_colored_help_set(&self) -> bool { - self.is_set(AppSettings::DisableColoredHelp) - } - - /// Report whether [`Command::help_expected`] is set - #[cfg(debug_assertions)] - pub(crate) fn is_help_expected_set(&self) -> bool { - self.is_set(AppSettings::HelpExpected) - } - - /// Report whether [`Command::dont_collapse_args_in_usage`] is set - pub fn is_dont_collapse_args_in_usage_set(&self) -> bool { - self.is_set(AppSettings::DontCollapseArgsInUsage) - } - - /// Report whether [`Command::infer_long_args`] is set - pub(crate) fn is_infer_long_args_set(&self) -> bool { - self.is_set(AppSettings::InferLongArgs) - } - - /// Report whether [`Command::infer_subcommands`] is set - pub(crate) fn is_infer_subcommands_set(&self) -> bool { - self.is_set(AppSettings::InferSubcommands) - } - - /// Report whether [`Command::arg_required_else_help`] is set - pub fn is_arg_required_else_help_set(&self) -> bool { - self.is_set(AppSettings::ArgRequiredElseHelp) - } - - /// Report whether [`Command::allow_hyphen_values`] is set - pub(crate) fn is_allow_hyphen_values_set(&self) -> bool { - self.is_set(AppSettings::AllowHyphenValues) - } - - /// Report whether [`Command::allow_negative_numbers`] is set - pub fn is_allow_negative_numbers_set(&self) -> bool { - self.is_set(AppSettings::AllowNegativeNumbers) - } - - /// Report whether [`Command::trailing_var_arg`] is set - pub fn is_trailing_var_arg_set(&self) -> bool { - self.is_set(AppSettings::TrailingVarArg) - } - - /// Report whether [`Command::allow_missing_positional`] is set - pub fn is_allow_missing_positional_set(&self) -> bool { - self.is_set(AppSettings::AllowMissingPositional) - } - - /// Report whether [`Command::hide`] is set - pub fn is_hide_set(&self) -> bool { - self.is_set(AppSettings::Hidden) - } - - /// Report whether [`Command::subcommand_required`] is set - pub fn is_subcommand_required_set(&self) -> bool { - self.is_set(AppSettings::SubcommandRequired) - } - - /// Report whether [`Command::allow_external_subcommands`] is set - pub fn is_allow_external_subcommands_set(&self) -> bool { - self.is_set(AppSettings::AllowExternalSubcommands) - } - - /// Report whether [`Command::allow_invalid_utf8_for_external_subcommands`] is set - pub fn is_allow_invalid_utf8_for_external_subcommands_set(&self) -> bool { - self.is_set(AppSettings::AllowInvalidUtf8ForExternalSubcommands) - } - - /// Configured parser for values passed to an external subcommand - /// - /// # Example - /// - /// ```rust - /// let cmd = clap::Command::new("raw") - /// .allow_external_subcommands(true) - /// .allow_invalid_utf8_for_external_subcommands(true); - /// let value_parser = cmd.get_external_subcommand_value_parser(); - /// println!("{:?}", value_parser); - /// ``` - pub fn get_external_subcommand_value_parser(&self) -> Option<&super::ValueParser> { - if !self.is_allow_external_subcommands_set() { - None - } else if self.is_allow_invalid_utf8_for_external_subcommands_set() { - static DEFAULT: super::ValueParser = super::ValueParser::os_string(); - Some(&DEFAULT) - } else { - static DEFAULT: super::ValueParser = super::ValueParser::string(); - Some(&DEFAULT) - } - } - - /// Report whether [`Command::args_conflicts_with_subcommands`] is set - pub fn is_args_conflicts_with_subcommands_set(&self) -> bool { - self.is_set(AppSettings::ArgsNegateSubcommands) - } - - /// Report whether [`Command::subcommand_precedence_over_arg`] is set - pub fn is_subcommand_precedence_over_arg_set(&self) -> bool { - self.is_set(AppSettings::SubcommandPrecedenceOverArg) - } - - /// Report whether [`Command::subcommand_negates_reqs`] is set - pub fn is_subcommand_negates_reqs_set(&self) -> bool { - self.is_set(AppSettings::SubcommandsNegateReqs) - } - - /// Report whether [`Command::multicall`] is set - pub fn is_multicall_set(&self) -> bool { - self.is_set(AppSettings::Multicall) - } -} - -/// Deprecated -impl<'help> App<'help> { - /// 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 (mut a, yaml, err) = if let Some(name) = y["name"].as_str() { - (App::new(name), yaml_file_hash, "cmd".into()) - } else { - let (name_yaml, value_yaml) = yaml_file_hash - .iter() - .next() - .expect("There must be one subcommand in the YAML file"); - let name_str = name_yaml - .as_str() - .expect("Subcommand name must be a string"); - - ( - App::new(name_str), - value_yaml.as_hash().expect("Subcommand must be a hash"), - format!("subcommand '{}'", name_str), - ) - }; - - for (k, v) in yaml { - a = match k.as_str().expect("App fields must be strings") { - "version" => yaml_to_str!(a, v, version), - "long_version" => yaml_to_str!(a, v, long_version), - "author" => yaml_to_str!(a, v, author), - "bin_name" => yaml_to_str!(a, v, bin_name), - "about" => yaml_to_str!(a, v, about), - "long_about" => yaml_to_str!(a, v, long_about), - "before_help" => yaml_to_str!(a, v, before_help), - "after_help" => yaml_to_str!(a, v, after_help), - "template" => yaml_to_str!(a, v, help_template), - "usage" => yaml_to_str!(a, v, override_usage), - "help" => yaml_to_str!(a, v, override_help), - "help_message" => yaml_to_str!(a, v, help_message), - "version_message" => yaml_to_str!(a, v, version_message), - "alias" => yaml_to_str!(a, v, alias), - "aliases" => yaml_vec_or_str!(a, v, alias), - "visible_alias" => yaml_to_str!(a, v, visible_alias), - "visible_aliases" => yaml_vec_or_str!(a, v, visible_alias), - "display_order" => yaml_to_usize!(a, v, display_order), - "args" => { - if let Some(vec) = v.as_vec() { - for arg_yaml in vec { - a = a.arg(Arg::from_yaml(arg_yaml)); - } - } else { - panic!("Failed to convert YAML value {:?} to a vec", v); - } - a - } - "subcommands" => { - if let Some(vec) = v.as_vec() { - for sc_yaml in vec { - a = a.subcommand(App::from_yaml(sc_yaml)); - } - } else { - panic!("Failed to convert YAML value {:?} to a vec", v); - } - a - } - "groups" => { - if let Some(vec) = v.as_vec() { - for ag_yaml in vec { - a = a.group(ArgGroup::from(ag_yaml)); - } - } else { - panic!("Failed to convert YAML value {:?} to a vec", v); - } - a - } - "setting" | "settings" => { - yaml_to_setting!(a, v, setting, AppSettings, "AppSetting", err) - } - "global_setting" | "global_settings" => { - yaml_to_setting!(a, v, global_setting, AppSettings, "AppSetting", err) - } - _ => a, - } - } - - a - } - - /// Deprecated, replaced with [`Command::override_usage`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::override_usage`") - )] - #[doc(hidden)] - #[must_use] - pub fn usage<S: Into<&'help str>>(self, usage: S) -> Self { - self.override_usage(usage) - } - - /// Deprecated, replaced with [`Command::override_help`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::override_help`") - )] - #[doc(hidden)] - #[must_use] - pub fn help<S: Into<&'help str>>(self, help: S) -> Self { - self.override_help(help) - } - - /// Deprecated, replaced with [`Command::mut_arg`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::mut_arg`") - )] - #[doc(hidden)] - #[must_use] - pub fn help_short(self, c: char) -> Self { - self.mut_arg("help", |a| a.short(c)) - } - - /// Deprecated, replaced with [`Command::mut_arg`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::mut_arg`") - )] - #[doc(hidden)] - #[must_use] - pub fn version_short(self, c: char) -> Self { - self.mut_arg("version", |a| a.short(c)) - } - - /// Deprecated, replaced with [`Command::mut_arg`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::mut_arg`") - )] - #[doc(hidden)] - #[must_use] - pub fn help_message(self, s: impl Into<&'help str>) -> Self { - self.mut_arg("help", |a| a.help(s.into())) - } - - /// Deprecated, replaced with [`Command::mut_arg`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::mut_arg`") - )] - #[doc(hidden)] - #[must_use] - pub fn version_message(self, s: impl Into<&'help str>) -> Self { - self.mut_arg("version", |a| a.help(s.into())) - } - - /// Deprecated, replaced with [`Command::help_template`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::help_template`") - )] - #[doc(hidden)] - #[must_use] - pub fn template<S: Into<&'help str>>(self, s: S) -> Self { - self.help_template(s) - } - - /// Deprecated, replaced with [`Command::setting(a| b)`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::setting(a | b)`") - )] - #[doc(hidden)] - #[must_use] - pub fn settings(mut self, settings: &[AppSettings]) -> Self { - for s in settings { - self.settings.insert((*s).into()); - } - self - } - - /// Deprecated, replaced with [`Command::unset_setting(a| b)`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::unset_setting(a | b)`") - )] - #[doc(hidden)] - #[must_use] - pub fn unset_settings(mut self, settings: &[AppSettings]) -> Self { - for s in settings { - self.settings.remove((*s).into()); - } - self - } - - /// Deprecated, replaced with [`Command::global_setting(a| b)`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::global_setting(a | b)`") - )] - #[doc(hidden)] - #[must_use] - pub fn global_settings(mut self, settings: &[AppSettings]) -> Self { - for s in settings { - self.settings.insert((*s).into()); - self.g_settings.insert((*s).into()); - } - self - } - - /// Deprecated, replaced with [`Command::term_width`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::term_width`") - )] - #[doc(hidden)] - #[must_use] - pub fn set_term_width(self, width: usize) -> Self { - self.term_width(width) - } - - /// 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)] - #[must_use] - pub fn arg_from_usage(self, usage: &'help str) -> Self { - #![allow(deprecated)] - self.arg(Arg::from_usage(usage)) - } - - /// 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)] - #[must_use] - pub fn args_from_usage(mut self, usage: &'help str) -> Self { - #![allow(deprecated)] - for line in usage.lines() { - let l = line.trim(); - if l.is_empty() { - continue; - } - self = self.arg(Arg::from_usage(l)); - } - self - } - - /// Deprecated, replaced with [`Command::render_version`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::render_version`") - )] - #[doc(hidden)] - pub fn write_version<W: io::Write>(&self, w: &mut W) -> ClapResult<()> { - write!(w, "{}", self.render_version()).map_err(From::from) - } - - /// Deprecated, replaced with [`Command::render_long_version`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::render_long_version`") - )] - #[doc(hidden)] - pub fn write_long_version<W: io::Write>(&self, w: &mut W) -> ClapResult<()> { - write!(w, "{}", self.render_long_version()).map_err(From::from) - } - - /// Deprecated, replaced with [`Command::try_get_matches`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::try_get_matches`") - )] - #[doc(hidden)] - pub fn get_matches_safe(self) -> ClapResult<ArgMatches> { - self.try_get_matches() - } - - /// Deprecated, replaced with [`Command::try_get_matches_from`] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.0.0", note = "Replaced with `App::try_get_matches_from`") - )] - #[doc(hidden)] - pub fn get_matches_from_safe<I, T>(self, itr: I) -> ClapResult<ArgMatches> - where - I: IntoIterator<Item = T>, - T: Into<OsString> + Clone, - { - self.try_get_matches_from(itr) - } - - /// Deprecated, replaced with [`Command::try_get_matches_from_mut`] - #[cfg_attr( - feature = "deprecated", - deprecated( - since = "3.0.0", - note = "Replaced with `App::try_get_matches_from_mut`" - ) - )] - #[doc(hidden)] - pub fn get_matches_from_safe_borrow<I, T>(&mut self, itr: I) -> ClapResult<ArgMatches> - where - I: IntoIterator<Item = T>, - T: Into<OsString> + Clone, - { - self.try_get_matches_from_mut(itr) - } -} - -// Internally used only -impl<'help> App<'help> { - pub(crate) fn get_id(&self) -> Id { - self.id.clone() - } - - pub(crate) fn get_override_usage(&self) -> Option<&str> { - self.usage_str - } - - pub(crate) fn get_override_help(&self) -> Option<&str> { - self.help_str - } - - pub(crate) fn get_help_template(&self) -> Option<&str> { - self.template - } - - pub(crate) fn get_term_width(&self) -> Option<usize> { - self.term_w - } - - pub(crate) fn get_max_term_width(&self) -> Option<usize> { - self.max_w - } - - pub(crate) fn get_replacement(&self, key: &str) -> Option<&[&str]> { - self.replacers.get(key).copied() - } - - pub(crate) fn get_keymap(&self) -> &MKeyMap<'help> { - &self.args - } - - fn get_used_global_args(&self, matches: &ArgMatches, global_arg_vec: &mut Vec<Id>) { - global_arg_vec.extend( - self.args - .args() - .filter(|a| a.is_global_set()) - .map(|ga| ga.id.clone()), - ); - if let Some((id, matches)) = matches.subcommand() { - if let Some(used_sub) = self.find_subcommand(id) { - used_sub.get_used_global_args(matches, global_arg_vec); - } - } - } - - fn _do_parse( - &mut self, - raw_args: &mut clap_lex::RawArgs, - args_cursor: clap_lex::ArgCursor, - ) -> ClapResult<ArgMatches> { - debug!("Command::_do_parse"); - - // If there are global arguments, or settings we need to propagate them down to subcommands - // before parsing in case we run into a subcommand - self._build_self(); - - let mut matcher = ArgMatcher::new(self); - - // do the real parsing - let mut parser = Parser::new(self); - if let Err(error) = parser.get_matches_with(&mut matcher, raw_args, args_cursor) { - if self.is_set(AppSettings::IgnoreErrors) { - debug!("Command::_do_parse: ignoring error: {}", error); - } else { - return Err(error); - } - } - - let mut global_arg_vec = Default::default(); - self.get_used_global_args(&matcher, &mut global_arg_vec); - - matcher.propagate_globals(&global_arg_vec); - - Ok(matcher.into_inner()) - } - - #[doc(hidden)] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.10", note = "Replaced with `Command::build`") - )] - pub fn _build_all(&mut self) { - self.build(); - } - - #[doc(hidden)] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.10", note = "Replaced with `Command::build`") - )] - pub fn _build(&mut self) { - self._build_self() - } - - #[doc(hidden)] - #[cfg_attr( - feature = "deprecated", - deprecated(since = "3.1.13", note = "Replaced with `Command::build`") - )] - pub fn _build_bin_names(&mut self) { - self._build_bin_names_internal(); - } - - /// Prepare for introspecting on all included [`Command`]s - /// - /// Call this on the top-level [`Command`] when done building and before reading state for - /// cases like completions, custom help output, etc. - pub fn build(&mut self) { - self._build_recursive(); - self._build_bin_names_internal(); - } - - pub(crate) fn _build_recursive(&mut self) { - self._build_self(); - for subcmd in self.get_subcommands_mut() { - subcmd._build_recursive(); - } - } - - pub(crate) fn _build_self(&mut self) { - debug!("Command::_build: name={:?}", self.get_name()); - if !self.settings.is_set(AppSettings::Built) { - // Make sure all the globally set flags apply to us as well - self.settings = self.settings | self.g_settings; - - if self.is_multicall_set() { - self.settings.insert(AppSettings::SubcommandRequired.into()); - self.settings.insert(AppSettings::DisableHelpFlag.into()); - self.settings.insert(AppSettings::DisableVersionFlag.into()); - } - - self._propagate(); - self._check_help_and_version(); - self._propagate_global_args(); - self._derive_display_order(); - - let mut pos_counter = 1; - let self_override = self.is_set(AppSettings::AllArgsOverrideSelf); - let hide_pv = self.is_set(AppSettings::HidePossibleValues); - let auto_help = - !self.is_set(AppSettings::NoAutoHelp) && !self.is_disable_help_flag_set(); - let auto_version = - !self.is_set(AppSettings::NoAutoVersion) && !self.is_disable_version_flag_set(); - for a in self.args.args_mut() { - // Fill in the groups - for g in &a.groups { - if let Some(ag) = self.groups.iter_mut().find(|grp| grp.id == *g) { - ag.args.push(a.id.clone()); - } else { - let mut ag = ArgGroup::with_id(g.clone()); - ag.args.push(a.id.clone()); - self.groups.push(ag); - } - } - - // Figure out implied settings - if a.is_last_set() { - // if an arg has `Last` set, we need to imply DontCollapseArgsInUsage so that args - // in the usage string don't get confused or left out. - self.settings.set(AppSettings::DontCollapseArgsInUsage); - } - if hide_pv && a.is_takes_value_set() { - a.settings.set(ArgSettings::HidePossibleValues); - } - if self_override { - let self_id = a.id.clone(); - a.overrides.push(self_id); - } - a._build(); - // HACK: Setting up action at this level while auto-help / disable help flag is - // required. Otherwise, most of this won't be needed because when we can break - // compat, actions will reign supreme (default to `Store`) - if a.action.is_none() { - if a.get_id() == "help" && auto_help && !a.is_takes_value_set() { - let action = super::ArgAction::Help; - a.action = Some(action); - } else if a.get_id() == "version" && auto_version && !a.is_takes_value_set() { - let action = super::ArgAction::Version; - a.action = Some(action); - } else if a.is_takes_value_set() { - let action = super::ArgAction::StoreValue; - a.action = Some(action); - } else { - let action = super::ArgAction::IncOccurrence; - a.action = Some(action); - } - } - if a.is_positional() && a.index.is_none() { - a.index = Some(pos_counter); - pos_counter += 1; - } - } - - self.args._build(); - - #[cfg(debug_assertions)] - assert_app(self); - self.settings.set(AppSettings::Built); - } else { - debug!("Command::_build: already built"); - } - } - - pub(crate) fn _build_subcommand(&mut self, name: &str) -> Option<&mut Self> { - use std::fmt::Write; - - let mut mid_string = String::from(" "); - if !self.is_subcommand_negates_reqs_set() && !self.is_args_conflicts_with_subcommands_set() - { - let reqs = Usage::new(self).get_required_usage_from(&[], None, true); // maybe Some(m) - - for s in &reqs { - mid_string.push_str(s); - mid_string.push(' '); - } - } - let is_multicall_set = self.is_multicall_set(); - - let sc = self.subcommands.iter_mut().find(|s| s.name == name)?; - - // Display subcommand name, short and long in usage - let mut sc_names = sc.name.clone(); - let mut flag_subcmd = false; - if let Some(l) = sc.long_flag { - write!(sc_names, "|--{}", l).unwrap(); - flag_subcmd = true; - } - if let Some(s) = sc.short_flag { - write!(sc_names, "|-{}", s).unwrap(); - flag_subcmd = true; - } - - if flag_subcmd { - sc_names = format!("{{{}}}", sc_names); - } - - let usage_name = self - .bin_name - .as_ref() - .map(|bin_name| format!("{}{}{}", bin_name, mid_string, sc_names)) - .unwrap_or(sc_names); - sc.usage_name = Some(usage_name); - - // bin_name should be parent's bin_name + [<reqs>] + the sc's name separated by - // a space - let bin_name = format!( - "{}{}{}", - self.bin_name.as_ref().unwrap_or(&String::new()), - if self.bin_name.is_some() { " " } else { "" }, - &*sc.name - ); - debug!( - "Command::_build_subcommand Setting bin_name of {} to {:?}", - sc.name, bin_name - ); - sc.bin_name = Some(bin_name); - - if sc.display_name.is_none() { - let self_display_name = if is_multicall_set { - self.display_name.as_deref().unwrap_or("") - } else { - self.display_name.as_deref().unwrap_or(&self.name) - }; - let display_name = format!( - "{}{}{}", - self_display_name, - if !self_display_name.is_empty() { - "-" - } else { - "" - }, - &*sc.name - ); - debug!( - "Command::_build_subcommand Setting display_name of {} to {:?}", - sc.name, display_name - ); - sc.display_name = Some(display_name); - } - - // Ensure all args are built and ready to parse - sc._build_self(); - - Some(sc) - } - - fn _build_bin_names_internal(&mut self) { - debug!("Command::_build_bin_names"); - - if !self.is_set(AppSettings::BinNameBuilt) { - let mut mid_string = String::from(" "); - if !self.is_subcommand_negates_reqs_set() - && !self.is_args_conflicts_with_subcommands_set() - { - let reqs = Usage::new(self).get_required_usage_from(&[], None, true); // maybe Some(m) - - for s in &reqs { - mid_string.push_str(s); - mid_string.push(' '); - } - } - let is_multicall_set = self.is_multicall_set(); - - let self_bin_name = if is_multicall_set { - self.bin_name.as_deref().unwrap_or("") - } else { - self.bin_name.as_deref().unwrap_or(&self.name) - } - .to_owned(); - - for mut sc in &mut self.subcommands { - debug!("Command::_build_bin_names:iter: bin_name set..."); - - if sc.usage_name.is_none() { - use std::fmt::Write; - // Display subcommand name, short and long in usage - let mut sc_names = sc.name.clone(); - let mut flag_subcmd = false; - if let Some(l) = sc.long_flag { - write!(sc_names, "|--{}", l).unwrap(); - flag_subcmd = true; - } - if let Some(s) = sc.short_flag { - write!(sc_names, "|-{}", s).unwrap(); - flag_subcmd = true; - } - - if flag_subcmd { - sc_names = format!("{{{}}}", sc_names); - } - - let usage_name = format!("{}{}{}", self_bin_name, mid_string, sc_names); - debug!( - "Command::_build_bin_names:iter: Setting usage_name of {} to {:?}", - sc.name, usage_name - ); - sc.usage_name = Some(usage_name); - } else { - debug!( - "Command::_build_bin_names::iter: Using existing usage_name of {} ({:?})", - sc.name, sc.usage_name - ); - } - - if sc.bin_name.is_none() { - let bin_name = format!( - "{}{}{}", - self_bin_name, - if !self_bin_name.is_empty() { " " } else { "" }, - &*sc.name - ); - debug!( - "Command::_build_bin_names:iter: Setting bin_name of {} to {:?}", - sc.name, bin_name - ); - sc.bin_name = Some(bin_name); - } else { - debug!( - "Command::_build_bin_names::iter: Using existing bin_name of {} ({:?})", - sc.name, sc.bin_name - ); - } - - if sc.display_name.is_none() { - let self_display_name = if is_multicall_set { - self.display_name.as_deref().unwrap_or("") - } else { - self.display_name.as_deref().unwrap_or(&self.name) - }; - let display_name = format!( - "{}{}{}", - self_display_name, - if !self_display_name.is_empty() { - "-" - } else { - "" - }, - &*sc.name - ); - debug!( - "Command::_build_bin_names:iter: Setting display_name of {} to {:?}", - sc.name, display_name - ); - sc.display_name = Some(display_name); - } else { - debug!( - "Command::_build_bin_names::iter: Using existing display_name of {} ({:?})", - sc.name, sc.display_name - ); - } - - sc._build_bin_names_internal(); - } - self.set(AppSettings::BinNameBuilt); - } else { - debug!("Command::_build_bin_names: already built"); - } - } - - pub(crate) fn _panic_on_missing_help(&self, help_required_globally: bool) { - if self.is_set(AppSettings::HelpExpected) || help_required_globally { - let args_missing_help: Vec<String> = self - .args - .args() - .filter(|arg| arg.help.is_none() && arg.long_help.is_none()) - .map(|arg| String::from(arg.name)) - .collect(); - - assert!(args_missing_help.is_empty(), - "Command::help_expected is enabled for the Command {}, but at least one of its arguments does not have either `help` or `long_help` set. List of such arguments: {}", - self.name, - args_missing_help.join(", ") - ); - } - - for sub_app in &self.subcommands { - sub_app._panic_on_missing_help(help_required_globally); - } - } - - #[cfg(debug_assertions)] - pub(crate) fn two_args_of<F>(&self, condition: F) -> Option<(&Arg<'help>, &Arg<'help>)> - where - F: Fn(&Arg) -> bool, - { - two_elements_of(self.args.args().filter(|a: &&Arg| condition(a))) - } - - // just in case - #[allow(unused)] - fn two_groups_of<F>(&self, condition: F) -> Option<(&ArgGroup, &ArgGroup)> - where - F: Fn(&ArgGroup) -> bool, - { - two_elements_of(self.groups.iter().filter(|a| condition(a))) - } - - /// Propagate global args - pub(crate) fn _propagate_global_args(&mut self) { - debug!("Command::_propagate_global_args:{}", self.name); - - for sc in &mut self.subcommands { - for a in self.args.args().filter(|a| a.is_global_set()) { - let mut propagate = false; - let is_generated = matches!( - a.provider, - ArgProvider::Generated | ArgProvider::GeneratedMutated - ); - - // Remove generated help and version args in the subcommand - // - // Don't remove if those args are further mutated - if is_generated { - let generated_pos = sc - .args - .args() - .position(|x| x.id == a.id && x.provider == ArgProvider::Generated); - - if let Some(index) = generated_pos { - debug!( - "Command::_propagate removing {}'s {:?}", - sc.get_name(), - a.id - ); - sc.args.remove(index); - propagate = true; - } - } - - if propagate || sc.find(&a.id).is_none() { - debug!( - "Command::_propagate pushing {:?} to {}", - a.id, - sc.get_name(), - ); - sc.args.push(a.clone()); - } - } - } - } - - /// Propagate settings - pub(crate) fn _propagate(&mut self) { - debug!("Command::_propagate:{}", self.name); - let mut subcommands = std::mem::take(&mut self.subcommands); - for sc in &mut subcommands { - self._propagate_subcommand(sc); - } - self.subcommands = subcommands; - } - - fn _propagate_subcommand(&self, sc: &mut Self) { - // We have to create a new scope in order to tell rustc the borrow of `sc` is - // done and to recursively call this method - { - if self.settings.is_set(AppSettings::PropagateVersion) { - if sc.version.is_none() && self.version.is_some() { - sc.version = Some(self.version.unwrap()); - } - if sc.long_version.is_none() && self.long_version.is_some() { - sc.long_version = Some(self.long_version.unwrap()); - } - } - - sc.settings = sc.settings | self.g_settings; - sc.g_settings = sc.g_settings | self.g_settings; - sc.term_w = self.term_w; - sc.max_w = self.max_w; - } - } - - #[allow(clippy::blocks_in_if_conditions)] - pub(crate) fn _check_help_and_version(&mut self) { - debug!("Command::_check_help_and_version: {}", self.name); - - if self.is_set(AppSettings::DisableHelpFlag) - || self.args.args().any(|x| { - x.provider == ArgProvider::User - && (x.long == Some("help") || x.id == Id::help_hash()) - }) - || self - .subcommands - .iter() - .any(|sc| sc.long_flag == Some("help")) - { - debug!("Command::_check_help_and_version: Removing generated help"); - - let generated_help_pos = self - .args - .args() - .position(|x| x.id == Id::help_hash() && x.provider == ArgProvider::Generated); - - if let Some(index) = generated_help_pos { - self.args.remove(index); - } - } else { - let help = self - .args - .args() - .find(|x| x.id == Id::help_hash()) - .expect(INTERNAL_ERROR_MSG); - assert_ne!(help.provider, ArgProvider::User); - - if help.short.is_some() { - if help.short == Some('h') { - if let Some(other_arg) = self - .args - .args() - .find(|x| x.id != Id::help_hash() && x.short == Some('h')) - { - panic!( - "`help`s `-h` conflicts with `{}`. - -To change `help`s short, call `cmd.arg(Arg::new(\"help\")...)`.", - other_arg.name - ); - } - } - } else if !(self.args.args().any(|x| x.short == Some('h')) - || self.subcommands.iter().any(|sc| sc.short_flag == Some('h'))) - { - let help = self - .args - .args_mut() - .find(|x| x.id == Id::help_hash()) - .expect(INTERNAL_ERROR_MSG); - help.short = Some('h'); - } else { - debug!("Command::_check_help_and_version: Removing `-h` from help"); - } - } - - // Determine if we should remove the generated --version flag - // - // Note that if only mut_arg() was used, the first expression will evaluate to `true` - // however inside the condition block, we only check for Generated args, not - // GeneratedMutated args, so the `mut_arg("version", ..) will be skipped and fall through - // to the following condition below (Adding the short `-V`) - if self.settings.is_set(AppSettings::DisableVersionFlag) - || (self.version.is_none() && self.long_version.is_none()) - || self.args.args().any(|x| { - x.provider == ArgProvider::User - && (x.long == Some("version") || x.id == Id::version_hash()) - }) - || self - .subcommands - .iter() - .any(|sc| sc.long_flag == Some("version")) - { - debug!("Command::_check_help_and_version: Removing generated version"); - - // This is the check mentioned above that only checks for Generated, not - // GeneratedMutated args by design. - let generated_version_pos = self - .args - .args() - .position(|x| x.id == Id::version_hash() && x.provider == ArgProvider::Generated); - - if let Some(index) = generated_version_pos { - self.args.remove(index); - } - } - - // If we still have a generated --version flag, determine if we can apply the short `-V` - if self.args.args().any(|x| { - x.id == Id::version_hash() - && matches!( - x.provider, - ArgProvider::Generated | ArgProvider::GeneratedMutated - ) - }) { - let other_arg_has_short = self.args.args().any(|x| x.short == Some('V')); - let version = self - .args - .args_mut() - .find(|x| x.id == Id::version_hash()) - .expect(INTERNAL_ERROR_MSG); - - if !(version.short.is_some() - || other_arg_has_short - || self.subcommands.iter().any(|sc| sc.short_flag == Some('V'))) - { - version.short = Some('V'); - } - } - - if !self.is_set(AppSettings::DisableHelpSubcommand) - && self.has_subcommands() - && !self.subcommands.iter().any(|s| s.id == Id::help_hash()) - { - debug!("Command::_check_help_and_version: Building help subcommand"); - let mut help_subcmd = App::new("help") - .about("Print this message or the help of the given subcommand(s)") - .arg( - Arg::new("subcommand") - .index(1) - .takes_value(true) - .multiple_occurrences(true) - .value_name("SUBCOMMAND") - .help("The subcommand whose help message to display"), - ); - self._propagate_subcommand(&mut help_subcmd); - - // The parser acts like this is set, so let's set it so we don't falsely - // advertise it to the user - help_subcmd.version = None; - help_subcmd.long_version = None; - help_subcmd = help_subcmd - .setting(AppSettings::DisableHelpFlag) - .unset_global_setting(AppSettings::PropagateVersion); - - self.subcommands.push(help_subcmd); - } - } - - pub(crate) fn _derive_display_order(&mut self) { - debug!("Command::_derive_display_order:{}", self.name); - - if self.settings.is_set(AppSettings::DeriveDisplayOrder) { - for a in self - .args - .args_mut() - .filter(|a| !a.is_positional()) - .filter(|a| a.provider != ArgProvider::Generated) - { - a.disp_ord.make_explicit(); - } - for (i, sc) in &mut self.subcommands.iter_mut().enumerate() { - sc.disp_ord.get_or_insert(i); - } - } - for sc in &mut self.subcommands { - sc._derive_display_order(); - } - } - - pub(crate) fn _render_version(&self, use_long: bool) -> String { - debug!("Command::_render_version"); - - let ver = if use_long { - self.long_version.or(self.version).unwrap_or("") - } else { - self.version.or(self.long_version).unwrap_or("") - }; - if let Some(bn) = self.bin_name.as_ref() { - if bn.contains(' ') { - // In case we're dealing with subcommands i.e. git mv is translated to git-mv - format!("{} {}\n", bn.replace(' ', "-"), ver) - } else { - format!("{} {}\n", &self.name[..], ver) - } - } else { - format!("{} {}\n", &self.name[..], ver) - } - } - - pub(crate) fn format_group(&self, g: &Id) -> String { - let g_string = self - .unroll_args_in_group(g) - .iter() - .filter_map(|x| self.find(x)) - .map(|x| { - if x.is_positional() { - // Print val_name for positional arguments. e.g. <file_name> - x.name_no_brackets().to_string() - } else { - // Print usage string for flags arguments, e.g. <--help> - x.to_string() - } - }) - .collect::<Vec<_>>() - .join("|"); - format!("<{}>", &*g_string) - } -} - -/// A workaround: -/// <https://github.com/rust-lang/rust/issues/34511#issuecomment-373423999> -pub(crate) trait Captures<'a> {} -impl<'a, T> Captures<'a> for T {} - -// Internal Query Methods -impl<'help> App<'help> { - /// Iterate through the *flags* & *options* arguments. - pub(crate) fn get_non_positionals(&self) -> impl Iterator<Item = &Arg<'help>> { - self.get_arguments().filter(|a| !a.is_positional()) - } - - /// Iterate through the *positionals* that don't have custom heading. - pub(crate) fn get_positionals_with_no_heading(&self) -> impl Iterator<Item = &Arg<'help>> { - self.get_positionals() - .filter(|a| a.get_help_heading().is_none()) - } - - /// Iterate through the *flags* & *options* that don't have custom heading. - pub(crate) fn get_non_positionals_with_no_heading(&self) -> impl Iterator<Item = &Arg<'help>> { - self.get_non_positionals() - .filter(|a| a.get_help_heading().is_none()) - } - - pub(crate) fn find(&self, arg_id: &Id) -> Option<&Arg<'help>> { - self.args.args().find(|a| a.id == *arg_id) - } - - #[inline] - pub(crate) fn contains_short(&self, s: char) -> bool { - assert!( - self.is_set(AppSettings::Built), - "If App::_build hasn't been called, manually search through Arg shorts" - ); - - self.args.contains(s) - } - - #[inline] - pub(crate) fn set(&mut self, s: AppSettings) { - self.settings.set(s) - } - - #[inline] - pub(crate) fn has_args(&self) -> bool { - !self.args.is_empty() - } - - pub(crate) fn has_positionals(&self) -> bool { - self.args.keys().any(|x| x.is_position()) - } - - pub(crate) fn has_visible_subcommands(&self) -> bool { - self.subcommands - .iter() - .any(|sc| sc.name != "help" && !sc.is_set(AppSettings::Hidden)) - } - - /// Check if this subcommand can be referred to as `name`. In other words, - /// check if `name` is the name of this subcommand or is one of its aliases. - #[inline] - pub(crate) fn aliases_to<T>(&self, name: &T) -> bool - where - T: PartialEq<str> + ?Sized, - { - *name == *self.get_name() || self.get_all_aliases().any(|alias| *name == *alias) - } - - /// Check if this subcommand can be referred to as `name`. In other words, - /// check if `name` is the name of this short flag subcommand or is one of its short flag aliases. - #[inline] - pub(crate) fn short_flag_aliases_to(&self, flag: char) -> bool { - Some(flag) == self.short_flag - || self.get_all_short_flag_aliases().any(|alias| flag == alias) - } - - /// Check if this subcommand can be referred to as `name`. In other words, - /// check if `name` is the name of this long flag subcommand or is one of its long flag aliases. - #[inline] - pub(crate) fn long_flag_aliases_to<T>(&self, flag: &T) -> bool - where - T: PartialEq<str> + ?Sized, - { - match self.long_flag { - Some(long_flag) => { - flag == long_flag || self.get_all_long_flag_aliases().any(|alias| flag == alias) - } - None => self.get_all_long_flag_aliases().any(|alias| flag == alias), - } - } - - #[cfg(debug_assertions)] - pub(crate) fn id_exists(&self, id: &Id) -> bool { - self.args.args().any(|x| x.id == *id) || self.groups.iter().any(|x| x.id == *id) - } - - /// Iterate through the groups this arg is member of. - pub(crate) fn groups_for_arg<'a>(&'a self, arg: &Id) -> impl Iterator<Item = Id> + 'a { - debug!("Command::groups_for_arg: id={:?}", arg); - let arg = arg.clone(); - self.groups - .iter() - .filter(move |grp| grp.args.iter().any(|a| a == &arg)) - .map(|grp| grp.id.clone()) - } - - pub(crate) fn find_group(&self, group_id: &Id) -> Option<&ArgGroup<'help>> { - self.groups.iter().find(|g| g.id == *group_id) - } - - /// Iterate through all the names of all subcommands (not recursively), including aliases. - /// Used for suggestions. - pub(crate) fn all_subcommand_names(&self) -> impl Iterator<Item = &str> + Captures<'help> { - self.get_subcommands().flat_map(|sc| { - let name = sc.get_name(); - let aliases = sc.get_all_aliases(); - std::iter::once(name).chain(aliases) - }) - } - - pub(crate) fn required_graph(&self) -> ChildGraph<Id> { - let mut reqs = ChildGraph::with_capacity(5); - for a in self.args.args().filter(|a| a.is_required_set()) { - reqs.insert(a.id.clone()); - } - for group in &self.groups { - if group.required { - let idx = reqs.insert(group.id.clone()); - for a in &group.requires { - reqs.insert_child(idx, a.clone()); - } - } - } - - reqs - } - - pub(crate) fn unroll_args_in_group(&self, group: &Id) -> Vec<Id> { - debug!("Command::unroll_args_in_group: group={:?}", group); - let mut g_vec = vec![group]; - let mut args = vec![]; - - while let Some(g) = g_vec.pop() { - for n in self - .groups - .iter() - .find(|grp| grp.id == *g) - .expect(INTERNAL_ERROR_MSG) - .args - .iter() - { - debug!("Command::unroll_args_in_group:iter: entity={:?}", n); - if !args.contains(n) { - if self.find(n).is_some() { - debug!("Command::unroll_args_in_group:iter: this is an arg"); - args.push(n.clone()) - } else { - debug!("Command::unroll_args_in_group:iter: this is a group"); - g_vec.push(n); - } - } - } - } - - args - } - - pub(crate) fn unroll_arg_requires<F>(&self, func: F, arg: &Id) -> Vec<Id> - where - F: Fn(&(ArgPredicate<'_>, Id)) -> Option<Id>, - { - let mut processed = vec![]; - let mut r_vec = vec![arg]; - let mut args = vec![]; - - while let Some(a) = r_vec.pop() { - if processed.contains(&a) { - continue; - } - - processed.push(a); - - if let Some(arg) = self.find(a) { - for r in arg.requires.iter().filter_map(&func) { - if let Some(req) = self.find(&r) { - if !req.requires.is_empty() { - r_vec.push(&req.id) - } - } - args.push(r); - } - } - } - - args - } - - /// Find a flag subcommand name by short flag or an alias - pub(crate) fn find_short_subcmd(&self, c: char) -> Option<&str> { - self.get_subcommands() - .find(|sc| sc.short_flag_aliases_to(c)) - .map(|sc| sc.get_name()) - } - - /// Find a flag subcommand name by long flag or an alias - pub(crate) fn find_long_subcmd(&self, long: &str) -> Option<&str> { - self.get_subcommands() - .find(|sc| sc.long_flag_aliases_to(long)) - .map(|sc| sc.get_name()) - } - - pub(crate) fn get_display_order(&self) -> usize { - self.disp_ord.unwrap_or(999) - } - - pub(crate) fn write_help_err( - &self, - mut use_long: bool, - stream: Stream, - ) -> ClapResult<Colorizer> { - debug!( - "Parser::write_help_err: use_long={:?}, stream={:?}", - use_long && self.use_long_help(), - stream - ); - - use_long = use_long && self.use_long_help(); - let usage = Usage::new(self); - - let mut c = Colorizer::new(stream, self.color_help()); - Help::new(HelpWriter::Buffer(&mut c), self, &usage, use_long).write_help()?; - Ok(c) - } - - pub(crate) fn use_long_help(&self) -> bool { - debug!("Command::use_long_help"); - // In this case, both must be checked. This allows the retention of - // original formatting, but also ensures that the actual -h or --help - // specified by the user is sent through. If hide_short_help is not included, - // then items specified with hidden_short_help will also be hidden. - let should_long = |v: &Arg| { - v.long_help.is_some() - || v.is_hide_long_help_set() - || v.is_hide_short_help_set() - || cfg!(feature = "unstable-v4") - && v.get_possible_values2() - .iter() - .any(PossibleValue::should_show_help) - }; - - // Subcommands aren't checked because we prefer short help for them, deferring to - // `cmd subcmd --help` for more. - self.get_long_about().is_some() - || self.get_before_long_help().is_some() - || self.get_after_long_help().is_some() - || self.get_arguments().any(should_long) - } - - // Should we color the help? - pub(crate) fn color_help(&self) -> ColorChoice { - #[cfg(feature = "color")] - if self.is_disable_colored_help_set() { - return ColorChoice::Never; - } - - self.get_color() - } -} - -impl<'help> Default for App<'help> { - fn default() -> Self { - Self { - id: Default::default(), - name: Default::default(), - long_flag: Default::default(), - short_flag: Default::default(), - display_name: Default::default(), - bin_name: Default::default(), - author: Default::default(), - version: Default::default(), - long_version: Default::default(), - about: Default::default(), - long_about: Default::default(), - before_help: Default::default(), - before_long_help: Default::default(), - after_help: Default::default(), - after_long_help: Default::default(), - aliases: Default::default(), - short_flag_aliases: Default::default(), - long_flag_aliases: Default::default(), - usage_str: Default::default(), - usage_name: Default::default(), - help_str: Default::default(), - disp_ord: Default::default(), - term_w: Default::default(), - max_w: Default::default(), - template: Default::default(), - settings: Default::default(), - g_settings: Default::default(), - args: Default::default(), - subcommands: Default::default(), - replacers: Default::default(), - groups: Default::default(), - current_help_heading: Default::default(), - current_disp_ord: Some(0), - subcommand_value_name: Default::default(), - subcommand_heading: Default::default(), - } - } -} - -impl<'help> Index<&'_ Id> for App<'help> { - type Output = Arg<'help>; - - fn index(&self, key: &Id) -> &Self::Output { - self.find(key).expect(INTERNAL_ERROR_MSG) - } -} - -impl fmt::Display for App<'_> { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - write!(f, "{}", self.name) - } -} - -fn two_elements_of<I, T>(mut iter: I) -> Option<(T, T)> -where - I: Iterator<Item = T>, -{ - let first = iter.next(); - let second = iter.next(); - - match (first, second) { - (Some(first), Some(second)) => Some((first, second)), - _ => None, - } -} - -#[test] -fn check_auto_traits() { - static_assertions::assert_impl_all!(Command: Send, Sync, Unpin); -} |