| // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| //! Simple getopt alternative. |
| //! |
| //! Construct a vector of options, either by using `reqopt`, `optopt`, and `optflag` |
| //! or by building them from components yourself, and pass them to `getopts`, |
| //! along with a vector of actual arguments (not including `argv[0]`). You'll |
| //! either get a failure code back, or a match. You'll have to verify whether |
| //! the amount of 'free' arguments in the match is what you expect. Use `opt_*` |
| //! accessors to get argument values out of the matches object. |
| //! |
| //! Single-character options are expected to appear on the command line with a |
| //! single preceding dash; multiple-character options are expected to be |
| //! proceeded by two dashes. Options that expect an argument accept their |
| //! argument following either a space or an equals sign. Single-character |
| //! options don't require the space. |
| //! |
| //! # Example |
| //! |
| //! The following example shows simple command line parsing for an application |
| //! that requires an input file to be specified, accepts an optional output |
| //! file name following `-o`, and accepts both `-h` and `--help` as optional flags. |
| //! |
| //! ```{.rust} |
| //! #![feature(rustc_private)] |
| //! |
| //! extern crate getopts; |
| //! use getopts::{optopt,optflag,getopts,OptGroup,usage}; |
| //! use std::env; |
| //! |
| //! fn do_work(inp: &str, out: Option<String>) { |
| //! println!("{}", inp); |
| //! match out { |
| //! Some(x) => println!("{}", x), |
| //! None => println!("No Output"), |
| //! } |
| //! } |
| //! |
| //! fn print_usage(program: &str, opts: &[OptGroup]) { |
| //! let brief = format!("Usage: {} [options]", program); |
| //! print!("{}", usage(&brief, opts)); |
| //! } |
| //! |
| //! fn main() { |
| //! let args: Vec<String> = env::args().collect(); |
| //! |
| //! let program = args[0].clone(); |
| //! |
| //! let opts = &[ |
| //! optopt("o", "", "set output file name", "NAME"), |
| //! optflag("h", "help", "print this help menu") |
| //! ]; |
| //! let matches = match getopts(&args[1..], opts) { |
| //! Ok(m) => { m } |
| //! Err(f) => { panic!(f.to_string()) } |
| //! }; |
| //! if matches.opt_present("h") { |
| //! print_usage(&program, opts); |
| //! return; |
| //! } |
| //! let output = matches.opt_str("o"); |
| //! let input = if !matches.free.is_empty() { |
| //! matches.free[0].clone() |
| //! } else { |
| //! print_usage(&program, opts); |
| //! return; |
| //! }; |
| //! do_work(&input, output); |
| //! } |
| //! ``` |
| |
| #![crate_name = "getopts"] |
| #![unstable(feature = "rustc_private", |
| reason = "use the crates.io `getopts` library instead", |
| issue = "27812")] |
| #![crate_type = "rlib"] |
| #![crate_type = "dylib"] |
| #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png", |
| html_favicon_url = "https://doc.rust-lang.org/favicon.ico", |
| html_root_url = "https://doc.rust-lang.org/nightly/", |
| html_playground_url = "https://play.rust-lang.org/", |
| test(attr(deny(warnings))))] |
| |
| #![deny(missing_docs)] |
| #![feature(staged_api)] |
| |
| use self::Name::*; |
| use self::HasArg::*; |
| use self::Occur::*; |
| use self::Fail::*; |
| use self::Optval::*; |
| use self::SplitWithinState::*; |
| use self::Whitespace::*; |
| use self::LengthLimit::*; |
| |
| use std::fmt; |
| use std::iter::repeat; |
| use std::result; |
| |
| /// Name of an option. Either a string or a single char. |
| #[derive(Clone, PartialEq, Eq, Debug)] |
| pub enum Name { |
| /// A string representing the long name of an option. |
| /// For example: "help" |
| Long(String), |
| /// A char representing the short name of an option. |
| /// For example: 'h' |
| Short(char), |
| } |
| |
| /// Describes whether an option has an argument. |
| #[derive(Clone, Copy, PartialEq, Eq, Debug)] |
| pub enum HasArg { |
| /// The option requires an argument. |
| Yes, |
| /// The option takes no argument. |
| No, |
| /// The option argument is optional. |
| Maybe, |
| } |
| |
| /// Describes how often an option may occur. |
| #[derive(Clone, Copy, PartialEq, Eq, Debug)] |
| pub enum Occur { |
| /// The option occurs once. |
| Req, |
| /// The option occurs at most once. |
| Optional, |
| /// The option occurs zero or more times. |
| Multi, |
| } |
| |
| /// A description of a possible option. |
| #[derive(Clone, PartialEq, Eq, Debug)] |
| pub struct Opt { |
| /// Name of the option |
| pub name: Name, |
| /// Whether it has an argument |
| pub hasarg: HasArg, |
| /// How often it can occur |
| pub occur: Occur, |
| /// Which options it aliases |
| pub aliases: Vec<Opt>, |
| } |
| |
| /// One group of options, e.g., both `-h` and `--help`, along with |
| /// their shared description and properties. |
| #[derive(Clone, PartialEq, Eq, Debug)] |
| pub struct OptGroup { |
| /// Short name of the option, e.g. `h` for a `-h` option |
| pub short_name: String, |
| /// Long name of the option, e.g. `help` for a `--help` option |
| pub long_name: String, |
| /// Hint for argument, e.g. `FILE` for a `-o FILE` option |
| pub hint: String, |
| /// Description for usage help text |
| pub desc: String, |
| /// Whether option has an argument |
| pub hasarg: HasArg, |
| /// How often it can occur |
| pub occur: Occur, |
| } |
| |
| /// Describes whether an option is given at all or has a value. |
| #[derive(Clone, PartialEq, Eq, Debug)] |
| enum Optval { |
| Val(String), |
| Given, |
| } |
| |
| /// The result of checking command line arguments. Contains a vector |
| /// of matches and a vector of free strings. |
| #[derive(Clone, PartialEq, Eq, Debug)] |
| pub struct Matches { |
| /// Options that matched |
| opts: Vec<Opt>, |
| /// Values of the Options that matched |
| vals: Vec<Vec<Optval>>, |
| /// Free string fragments |
| pub free: Vec<String>, |
| } |
| |
| /// The type returned when the command line does not conform to the |
| /// expected format. Use the `Debug` implementation to output detailed |
| /// information. |
| #[derive(Clone, PartialEq, Eq, Debug)] |
| pub enum Fail { |
| /// The option requires an argument but none was passed. |
| ArgumentMissing(String), |
| /// The passed option is not declared among the possible options. |
| UnrecognizedOption(String), |
| /// A required option is not present. |
| OptionMissing(String), |
| /// A single occurrence option is being used multiple times. |
| OptionDuplicated(String), |
| /// There's an argument being passed to a non-argument option. |
| UnexpectedArgument(String), |
| } |
| |
| /// The type of failure that occurred. |
| #[derive(Copy, Clone, PartialEq, Eq, Debug)] |
| #[allow(missing_docs)] |
| pub enum FailType { |
| ArgumentMissing_, |
| UnrecognizedOption_, |
| OptionMissing_, |
| OptionDuplicated_, |
| UnexpectedArgument_, |
| } |
| |
| /// The result of parsing a command line with a set of options. |
| pub type Result = result::Result<Matches, Fail>; |
| |
| impl Name { |
| fn from_str(nm: &str) -> Name { |
| if nm.len() == 1 { |
| Short(nm.chars().next().unwrap()) |
| } else { |
| Long(nm.to_owned()) |
| } |
| } |
| |
| fn to_string(&self) -> String { |
| match *self { |
| Short(ch) => ch.to_string(), |
| Long(ref s) => s.to_owned(), |
| } |
| } |
| } |
| |
| impl OptGroup { |
| /// Translate OptGroup into Opt. |
| /// (Both short and long names correspond to different Opts). |
| pub fn long_to_short(&self) -> Opt { |
| let OptGroup { |
| short_name, |
| long_name, |
| hasarg, |
| occur, |
| .. |
| } = (*self).clone(); |
| |
| match (short_name.len(), long_name.len()) { |
| (0, 0) => panic!("this long-format option was given no name"), |
| (0, _) => { |
| Opt { |
| name: Long((long_name)), |
| hasarg: hasarg, |
| occur: occur, |
| aliases: Vec::new(), |
| } |
| } |
| (1, 0) => { |
| Opt { |
| name: Short(short_name.chars().next().unwrap()), |
| hasarg: hasarg, |
| occur: occur, |
| aliases: Vec::new(), |
| } |
| } |
| (1, _) => { |
| Opt { |
| name: Long((long_name)), |
| hasarg: hasarg, |
| occur: occur, |
| aliases: vec![Opt { |
| name: Short(short_name.chars().next().unwrap()), |
| hasarg: hasarg, |
| occur: occur, |
| aliases: Vec::new(), |
| }], |
| } |
| } |
| (_, _) => panic!("something is wrong with the long-form opt"), |
| } |
| } |
| } |
| |
| impl Matches { |
| fn opt_vals(&self, nm: &str) -> Vec<Optval> { |
| match find_opt(&self.opts[..], Name::from_str(nm)) { |
| Some(id) => self.vals[id].clone(), |
| None => panic!("No option '{}' defined", nm), |
| } |
| } |
| |
| fn opt_val(&self, nm: &str) -> Option<Optval> { |
| let vals = self.opt_vals(nm); |
| if vals.is_empty() { |
| None |
| } else { |
| Some(vals[0].clone()) |
| } |
| } |
| |
| /// Returns true if an option was matched. |
| pub fn opt_present(&self, nm: &str) -> bool { |
| !self.opt_vals(nm).is_empty() |
| } |
| |
| /// Returns the number of times an option was matched. |
| pub fn opt_count(&self, nm: &str) -> usize { |
| self.opt_vals(nm).len() |
| } |
| |
| /// Returns true if any of several options were matched. |
| pub fn opts_present(&self, names: &[String]) -> bool { |
| for nm in names { |
| match find_opt(&self.opts, Name::from_str(&**nm)) { |
| Some(id) if !self.vals[id].is_empty() => return true, |
| _ => (), |
| }; |
| } |
| false |
| } |
| |
| /// Returns the string argument supplied to one of several matching options or `None`. |
| pub fn opts_str(&self, names: &[String]) -> Option<String> { |
| for nm in names { |
| if let Some(Val(ref s)) = self.opt_val(&nm[..]) { |
| return Some(s.clone()) |
| } |
| } |
| None |
| } |
| |
| /// Returns a vector of the arguments provided to all matches of the given |
| /// option. |
| /// |
| /// Used when an option accepts multiple values. |
| pub fn opt_strs(&self, nm: &str) -> Vec<String> { |
| let mut acc: Vec<String> = Vec::new(); |
| let r = self.opt_vals(nm); |
| for v in &r { |
| match *v { |
| Val(ref s) => acc.push((*s).clone()), |
| _ => (), |
| } |
| } |
| acc |
| } |
| |
| /// Returns the string argument supplied to a matching option or `None`. |
| pub fn opt_str(&self, nm: &str) -> Option<String> { |
| let vals = self.opt_vals(nm); |
| if vals.is_empty() { |
| return None::<String>; |
| } |
| match vals[0] { |
| Val(ref s) => Some((*s).clone()), |
| _ => None, |
| } |
| } |
| |
| |
| /// Returns the matching string, a default, or none. |
| /// |
| /// Returns none if the option was not present, `def` if the option was |
| /// present but no argument was provided, and the argument if the option was |
| /// present and an argument was provided. |
| pub fn opt_default(&self, nm: &str, def: &str) -> Option<String> { |
| let vals = self.opt_vals(nm); |
| if vals.is_empty() { |
| None |
| } else { |
| match vals[0] { |
| Val(ref s) => Some((*s).clone()), |
| _ => Some(def.to_owned()), |
| } |
| } |
| } |
| } |
| |
| fn is_arg(arg: &str) -> bool { |
| arg.len() > 1 && arg.as_bytes()[0] == b'-' |
| } |
| |
| fn find_opt(opts: &[Opt], nm: Name) -> Option<usize> { |
| // Search main options. |
| let pos = opts.iter().position(|opt| opt.name == nm); |
| if pos.is_some() { |
| return pos; |
| } |
| |
| // Search in aliases. |
| for candidate in opts { |
| if candidate.aliases.iter().position(|opt| opt.name == nm).is_some() { |
| return opts.iter().position(|opt| opt.name == candidate.name); |
| } |
| } |
| |
| None |
| } |
| |
| /// Create a long option that is required and takes an argument. |
| /// |
| /// * `short_name` - e.g. `"h"` for a `-h` option, or `""` for none |
| /// * `long_name` - e.g. `"help"` for a `--help` option, or `""` for none |
| /// * `desc` - Description for usage help |
| /// * `hint` - Hint that is used in place of the argument in the usage help, |
| /// e.g. `"FILE"` for a `-o FILE` option |
| pub fn reqopt(short_name: &str, long_name: &str, desc: &str, hint: &str) -> OptGroup { |
| let len = short_name.len(); |
| assert!(len == 1 || len == 0); |
| OptGroup { |
| short_name: short_name.to_owned(), |
| long_name: long_name.to_owned(), |
| hint: hint.to_owned(), |
| desc: desc.to_owned(), |
| hasarg: Yes, |
| occur: Req, |
| } |
| } |
| |
| /// Create a long option that is optional and takes an argument. |
| /// |
| /// * `short_name` - e.g. `"h"` for a `-h` option, or `""` for none |
| /// * `long_name` - e.g. `"help"` for a `--help` option, or `""` for none |
| /// * `desc` - Description for usage help |
| /// * `hint` - Hint that is used in place of the argument in the usage help, |
| /// e.g. `"FILE"` for a `-o FILE` option |
| pub fn optopt(short_name: &str, long_name: &str, desc: &str, hint: &str) -> OptGroup { |
| let len = short_name.len(); |
| assert!(len == 1 || len == 0); |
| OptGroup { |
| short_name: short_name.to_owned(), |
| long_name: long_name.to_owned(), |
| hint: hint.to_owned(), |
| desc: desc.to_owned(), |
| hasarg: Yes, |
| occur: Optional, |
| } |
| } |
| |
| /// Create a long option that is optional and does not take an argument. |
| /// |
| /// * `short_name` - e.g. `"h"` for a `-h` option, or `""` for none |
| /// * `long_name` - e.g. `"help"` for a `--help` option, or `""` for none |
| /// * `desc` - Description for usage help |
| pub fn optflag(short_name: &str, long_name: &str, desc: &str) -> OptGroup { |
| let len = short_name.len(); |
| assert!(len == 1 || len == 0); |
| OptGroup { |
| short_name: short_name.to_owned(), |
| long_name: long_name.to_owned(), |
| hint: "".to_owned(), |
| desc: desc.to_owned(), |
| hasarg: No, |
| occur: Optional, |
| } |
| } |
| |
| /// Create a long option that can occur more than once and does not |
| /// take an argument. |
| /// |
| /// * `short_name` - e.g. `"h"` for a `-h` option, or `""` for none |
| /// * `long_name` - e.g. `"help"` for a `--help` option, or `""` for none |
| /// * `desc` - Description for usage help |
| pub fn optflagmulti(short_name: &str, long_name: &str, desc: &str) -> OptGroup { |
| let len = short_name.len(); |
| assert!(len == 1 || len == 0); |
| OptGroup { |
| short_name: short_name.to_owned(), |
| long_name: long_name.to_owned(), |
| hint: "".to_owned(), |
| desc: desc.to_owned(), |
| hasarg: No, |
| occur: Multi, |
| } |
| } |
| |
| /// Create a long option that is optional and takes an optional argument. |
| /// |
| /// * `short_name` - e.g. `"h"` for a `-h` option, or `""` for none |
| /// * `long_name` - e.g. `"help"` for a `--help` option, or `""` for none |
| /// * `desc` - Description for usage help |
| /// * `hint` - Hint that is used in place of the argument in the usage help, |
| /// e.g. `"FILE"` for a `-o FILE` option |
| pub fn optflagopt(short_name: &str, long_name: &str, desc: &str, hint: &str) -> OptGroup { |
| let len = short_name.len(); |
| assert!(len == 1 || len == 0); |
| OptGroup { |
| short_name: short_name.to_owned(), |
| long_name: long_name.to_owned(), |
| hint: hint.to_owned(), |
| desc: desc.to_owned(), |
| hasarg: Maybe, |
| occur: Optional, |
| } |
| } |
| |
| /// Create a long option that is optional, takes an argument, and may occur |
| /// multiple times. |
| /// |
| /// * `short_name` - e.g. `"h"` for a `-h` option, or `""` for none |
| /// * `long_name` - e.g. `"help"` for a `--help` option, or `""` for none |
| /// * `desc` - Description for usage help |
| /// * `hint` - Hint that is used in place of the argument in the usage help, |
| /// e.g. `"FILE"` for a `-o FILE` option |
| pub fn optmulti(short_name: &str, long_name: &str, desc: &str, hint: &str) -> OptGroup { |
| let len = short_name.len(); |
| assert!(len == 1 || len == 0); |
| OptGroup { |
| short_name: short_name.to_owned(), |
| long_name: long_name.to_owned(), |
| hint: hint.to_owned(), |
| desc: desc.to_owned(), |
| hasarg: Yes, |
| occur: Multi, |
| } |
| } |
| |
| /// Create a generic option group, stating all parameters explicitly |
| pub fn opt(short_name: &str, |
| long_name: &str, |
| desc: &str, |
| hint: &str, |
| hasarg: HasArg, |
| occur: Occur) |
| -> OptGroup { |
| let len = short_name.len(); |
| assert!(len == 1 || len == 0); |
| OptGroup { |
| short_name: short_name.to_owned(), |
| long_name: long_name.to_owned(), |
| hint: hint.to_owned(), |
| desc: desc.to_owned(), |
| hasarg: hasarg, |
| occur: occur, |
| } |
| } |
| |
| impl fmt::Display for Fail { |
| fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
| match *self { |
| ArgumentMissing(ref nm) => write!(f, "Argument to option '{}' missing.", *nm), |
| UnrecognizedOption(ref nm) => write!(f, "Unrecognized option: '{}'.", *nm), |
| OptionMissing(ref nm) => write!(f, "Required option '{}' missing.", *nm), |
| OptionDuplicated(ref nm) => write!(f, "Option '{}' given more than once.", *nm), |
| UnexpectedArgument(ref nm) => write!(f, "Option '{}' does not take an argument.", *nm), |
| } |
| } |
| } |
| |
| /// Parse command line arguments according to the provided options. |
| /// |
| /// On success returns `Ok(Matches)`. Use methods such as `opt_present` |
| /// `opt_str`, etc. to interrogate results. |
| /// # Panics |
| /// |
| /// Returns `Err(Fail)` on failure: use the `Debug` implementation of `Fail` to display |
| /// information about it. |
| pub fn getopts(args: &[String], optgrps: &[OptGroup]) -> Result { |
| let opts: Vec<Opt> = optgrps.iter().map(|x| x.long_to_short()).collect(); |
| let n_opts = opts.len(); |
| |
| fn f(_x: usize) -> Vec<Optval> { |
| Vec::new() |
| } |
| |
| let mut vals: Vec<_> = (0..n_opts).map(f).collect(); |
| let mut free: Vec<String> = Vec::new(); |
| let l = args.len(); |
| let mut i = 0; |
| while i < l { |
| let cur = args[i].clone(); |
| let curlen = cur.len(); |
| if !is_arg(&cur[..]) { |
| free.push(cur); |
| } else if cur == "--" { |
| let mut j = i + 1; |
| while j < l { |
| free.push(args[j].clone()); |
| j += 1; |
| } |
| break; |
| } else { |
| let mut names; |
| let mut i_arg = None; |
| if cur.as_bytes()[1] == b'-' { |
| let tail = &cur[2..curlen]; |
| let tail_eq: Vec<&str> = tail.splitn(2, '=').collect(); |
| if tail_eq.len() <= 1 { |
| names = vec![Long(tail.to_owned())]; |
| } else { |
| names = vec![Long(tail_eq[0].to_owned())]; |
| i_arg = Some(tail_eq[1].to_owned()); |
| } |
| } else { |
| let mut j = 1; |
| names = Vec::new(); |
| while j < curlen { |
| let ch = cur[j..].chars().next().unwrap(); |
| let opt = Short(ch); |
| |
| // In a series of potential options (eg. -aheJ), if we |
| // see one which takes an argument, we assume all |
| // subsequent characters make up the argument. This |
| // allows options such as -L/usr/local/lib/foo to be |
| // interpreted correctly |
| |
| let opt_id = match find_opt(&opts, opt.clone()) { |
| Some(id) => id, |
| None => return Err(UnrecognizedOption(opt.to_string())), |
| }; |
| |
| names.push(opt); |
| |
| let arg_follows = match opts[opt_id].hasarg { |
| Yes | Maybe => true, |
| No => false, |
| }; |
| |
| let next = j + ch.len_utf8(); |
| if arg_follows && next < curlen { |
| i_arg = Some((&cur[next..curlen]).to_owned()); |
| break; |
| } |
| |
| j = next; |
| } |
| } |
| let mut name_pos = 0; |
| for nm in &names { |
| name_pos += 1; |
| let optid = match find_opt(&opts, (*nm).clone()) { |
| Some(id) => id, |
| None => return Err(UnrecognizedOption(nm.to_string())), |
| }; |
| match opts[optid].hasarg { |
| No => { |
| if name_pos == names.len() && !i_arg.is_none() { |
| return Err(UnexpectedArgument(nm.to_string())); |
| } |
| let v = &mut vals[optid]; |
| v.push(Given); |
| } |
| Maybe => { |
| if !i_arg.is_none() { |
| let v = &mut vals[optid]; |
| v.push(Val((i_arg.clone()).unwrap())); |
| } else if name_pos < names.len() || i + 1 == l || is_arg(&args[i + 1][..]) { |
| let v = &mut vals[optid]; |
| v.push(Given); |
| } else { |
| i += 1; |
| let v = &mut vals[optid]; |
| v.push(Val(args[i].clone())); |
| } |
| } |
| Yes => { |
| if !i_arg.is_none() { |
| let v = &mut vals[optid]; |
| v.push(Val(i_arg.clone().unwrap())); |
| } else if i + 1 == l { |
| return Err(ArgumentMissing(nm.to_string())); |
| } else { |
| i += 1; |
| let v = &mut vals[optid]; |
| v.push(Val(args[i].clone())); |
| } |
| } |
| } |
| } |
| } |
| i += 1; |
| } |
| for i in 0..n_opts { |
| let n = vals[i].len(); |
| let occ = opts[i].occur; |
| if occ == Req && n == 0 { |
| return Err(OptionMissing(opts[i].name.to_string())); |
| } |
| if occ != Multi && n > 1 { |
| return Err(OptionDuplicated(opts[i].name.to_string())); |
| } |
| } |
| Ok(Matches { |
| opts: opts, |
| vals: vals, |
| free: free, |
| }) |
| } |
| |
| /// Derive a usage message from a set of long options. |
| pub fn usage(brief: &str, opts: &[OptGroup]) -> String { |
| |
| let desc_sep = format!("\n{}", repeat(" ").take(24).collect::<String>()); |
| |
| let rows = opts.iter().map(|optref| { |
| let OptGroup{short_name, |
| long_name, |
| hint, |
| desc, |
| hasarg, |
| ..} = (*optref).clone(); |
| |
| let mut row = repeat(" ").take(4).collect::<String>(); |
| |
| // short option |
| match short_name.len() { |
| 0 => {} |
| 1 => { |
| row.push('-'); |
| row.push_str(&short_name[..]); |
| row.push(' '); |
| } |
| _ => panic!("the short name should only be 1 ascii char long"), |
| } |
| |
| // long option |
| match long_name.len() { |
| 0 => {} |
| _ => { |
| row.push_str("--"); |
| row.push_str(&long_name[..]); |
| row.push(' '); |
| } |
| } |
| |
| // arg |
| match hasarg { |
| No => {} |
| Yes => row.push_str(&hint[..]), |
| Maybe => { |
| row.push('['); |
| row.push_str(&hint[..]); |
| row.push(']'); |
| } |
| } |
| |
| // FIXME: #5516 should be graphemes not codepoints |
| // here we just need to indent the start of the description |
| let rowlen = row.chars().count(); |
| if rowlen < 24 { |
| for _ in 0..24 - rowlen { |
| row.push(' '); |
| } |
| } else { |
| row.push_str(&desc_sep[..]); |
| } |
| |
| // Normalize desc to contain words separated by one space character |
| let mut desc_normalized_whitespace = String::new(); |
| for word in desc.split_whitespace() { |
| desc_normalized_whitespace.push_str(word); |
| desc_normalized_whitespace.push(' '); |
| } |
| |
| // FIXME: #5516 should be graphemes not codepoints |
| let mut desc_rows = Vec::new(); |
| each_split_within(&desc_normalized_whitespace[..], 54, |substr| { |
| desc_rows.push(substr.to_owned()); |
| true |
| }); |
| |
| // FIXME: #5516 should be graphemes not codepoints |
| // wrapped description |
| row.push_str(&desc_rows.join(&desc_sep[..])); |
| |
| row |
| }); |
| |
| format!("{}\n\nOptions:\n{}\n", |
| brief, |
| rows.collect::<Vec<String>>().join("\n")) |
| } |
| |
| fn format_option(opt: &OptGroup) -> String { |
| let mut line = String::new(); |
| |
| if opt.occur != Req { |
| line.push('['); |
| } |
| |
| // Use short_name is possible, but fallback to long_name. |
| if !opt.short_name.is_empty() { |
| line.push('-'); |
| line.push_str(&opt.short_name[..]); |
| } else { |
| line.push_str("--"); |
| line.push_str(&opt.long_name[..]); |
| } |
| |
| if opt.hasarg != No { |
| line.push(' '); |
| if opt.hasarg == Maybe { |
| line.push('['); |
| } |
| line.push_str(&opt.hint[..]); |
| if opt.hasarg == Maybe { |
| line.push(']'); |
| } |
| } |
| |
| if opt.occur != Req { |
| line.push(']'); |
| } |
| if opt.occur == Multi { |
| line.push_str(".."); |
| } |
| |
| line |
| } |
| |
| /// Derive a short one-line usage summary from a set of long options. |
| pub fn short_usage(program_name: &str, opts: &[OptGroup]) -> String { |
| let mut line = format!("Usage: {} ", program_name); |
| line.push_str(&opts.iter() |
| .map(format_option) |
| .collect::<Vec<String>>() |
| .join(" ")[..]); |
| line |
| } |
| |
| #[derive(Copy, Clone)] |
| enum SplitWithinState { |
| A, // leading whitespace, initial state |
| B, // words |
| C, // internal and trailing whitespace |
| } |
| #[derive(Copy, Clone)] |
| enum Whitespace { |
| Ws, // current char is whitespace |
| Cr, // current char is not whitespace |
| } |
| #[derive(Copy, Clone)] |
| enum LengthLimit { |
| UnderLim, // current char makes current substring still fit in limit |
| OverLim, // current char makes current substring no longer fit in limit |
| } |
| |
| |
| /// Splits a string into substrings with possibly internal whitespace, |
| /// each of them at most `lim` bytes long. The substrings have leading and trailing |
| /// whitespace removed, and are only cut at whitespace boundaries. |
| /// |
| /// Note: Function was moved here from `std::str` because this module is the only place that |
| /// uses it, and because it was too specific for a general string function. |
| /// |
| /// # Panics |
| /// |
| /// Panics during iteration if the string contains a non-whitespace |
| /// sequence longer than the limit. |
| fn each_split_within<F>(ss: &str, lim: usize, mut it: F) -> bool |
| where F: FnMut(&str) -> bool |
| { |
| // Just for fun, let's write this as a state machine: |
| |
| let mut slice_start = 0; |
| let mut last_start = 0; |
| let mut last_end = 0; |
| let mut state = A; |
| let mut fake_i = ss.len(); |
| let mut lim = lim; |
| |
| let mut cont = true; |
| |
| // if the limit is larger than the string, lower it to save cycles |
| if lim >= fake_i { |
| lim = fake_i; |
| } |
| |
| let mut machine = |cont: &mut bool, (i, c): (usize, char)| -> bool { |
| let whitespace = if c.is_whitespace() { |
| Ws |
| } else { |
| Cr |
| }; |
| let limit = if (i - slice_start + 1) <= lim { |
| UnderLim |
| } else { |
| OverLim |
| }; |
| |
| state = match (state, whitespace, limit) { |
| (A, Ws, _) => A, |
| (A, Cr, _) => { |
| slice_start = i; |
| last_start = i; |
| B |
| } |
| |
| (B, Cr, UnderLim) => B, |
| (B, Cr, OverLim) if (i - last_start + 1) > lim => { |
| panic!("word starting with {} longer than limit!", |
| &ss[last_start..i + 1]) |
| } |
| (B, Cr, OverLim) => { |
| *cont = it(&ss[slice_start..last_end]); |
| slice_start = last_start; |
| B |
| } |
| (B, Ws, UnderLim) => { |
| last_end = i; |
| C |
| } |
| (B, Ws, OverLim) => { |
| last_end = i; |
| *cont = it(&ss[slice_start..last_end]); |
| A |
| } |
| |
| (C, Cr, UnderLim) => { |
| last_start = i; |
| B |
| } |
| (C, Cr, OverLim) => { |
| *cont = it(&ss[slice_start..last_end]); |
| slice_start = i; |
| last_start = i; |
| last_end = i; |
| B |
| } |
| (C, Ws, OverLim) => { |
| *cont = it(&ss[slice_start..last_end]); |
| A |
| } |
| (C, Ws, UnderLim) => C, |
| }; |
| |
| *cont |
| }; |
| |
| ss.char_indices().all(|x| machine(&mut cont, x)); |
| |
| // Let the automaton 'run out' by supplying trailing whitespace |
| while cont && |
| match state { |
| B | C => true, |
| A => false, |
| } { |
| machine(&mut cont, (fake_i, ' ')); |
| fake_i += 1; |
| } |
| cont |
| } |
| |
| #[test] |
| fn test_split_within() { |
| fn t(s: &str, i: usize, u: &[String]) { |
| let mut v = Vec::new(); |
| each_split_within(s, i, |s| { |
| v.push(s.to_string()); |
| true |
| }); |
| assert!(v.iter().zip(u).all(|(a, b)| a == b)); |
| } |
| t("", 0, &[]); |
| t("", 15, &[]); |
| t("hello", 15, &["hello".to_string()]); |
| t("\nMary had a little lamb\nLittle lamb\n", |
| 15, |
| &["Mary had a".to_string(), "little lamb".to_string(), "Little lamb".to_string()]); |
| t("\nMary had a little lamb\nLittle lamb\n", |
| ::std::usize::MAX, |
| &["Mary had a little lamb\nLittle lamb".to_string()]); |
| } |
| |
| #[cfg(test)] |
| mod tests { |
| use super::*; |
| use super::Fail::*; |
| |
| use std::result::Result::{Err, Ok}; |
| use std::result; |
| |
| // Tests for reqopt |
| #[test] |
| fn test_reqopt() { |
| let long_args = vec!["--test=20".to_string()]; |
| let opts = vec![reqopt("t", "test", "testing", "TEST")]; |
| let rs = getopts(&long_args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert!(m.opt_present("test")); |
| assert_eq!(m.opt_str("test").unwrap(), "20"); |
| assert!(m.opt_present("t")); |
| assert_eq!(m.opt_str("t").unwrap(), "20"); |
| } |
| _ => { |
| panic!("test_reqopt failed (long arg)"); |
| } |
| } |
| let short_args = vec!["-t".to_string(), "20".to_string()]; |
| match getopts(&short_args, &opts) { |
| Ok(ref m) => { |
| assert!((m.opt_present("test"))); |
| assert_eq!(m.opt_str("test").unwrap(), "20"); |
| assert!((m.opt_present("t"))); |
| assert_eq!(m.opt_str("t").unwrap(), "20"); |
| } |
| _ => { |
| panic!("test_reqopt failed (short arg)"); |
| } |
| } |
| } |
| |
| #[test] |
| fn test_reqopt_missing() { |
| let args = vec!["blah".to_string()]; |
| let opts = vec![reqopt("t", "test", "testing", "TEST")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Err(OptionMissing(_)) => {} |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_reqopt_no_arg() { |
| let long_args = vec!["--test".to_string()]; |
| let opts = vec![reqopt("t", "test", "testing", "TEST")]; |
| let rs = getopts(&long_args, &opts); |
| match rs { |
| Err(ArgumentMissing(_)) => {} |
| _ => panic!(), |
| } |
| let short_args = vec!["-t".to_string()]; |
| match getopts(&short_args, &opts) { |
| Err(ArgumentMissing(_)) => {} |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_reqopt_multi() { |
| let args = vec!["--test=20".to_string(), "-t".to_string(), "30".to_string()]; |
| let opts = vec![reqopt("t", "test", "testing", "TEST")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Err(OptionDuplicated(_)) => {} |
| _ => panic!(), |
| } |
| } |
| |
| // Tests for optopt |
| #[test] |
| fn test_optopt() { |
| let long_args = vec!["--test=20".to_string()]; |
| let opts = vec![optopt("t", "test", "testing", "TEST")]; |
| let rs = getopts(&long_args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert!(m.opt_present("test")); |
| assert_eq!(m.opt_str("test").unwrap(), "20"); |
| assert!((m.opt_present("t"))); |
| assert_eq!(m.opt_str("t").unwrap(), "20"); |
| } |
| _ => panic!(), |
| } |
| let short_args = vec!["-t".to_string(), "20".to_string()]; |
| match getopts(&short_args, &opts) { |
| Ok(ref m) => { |
| assert!((m.opt_present("test"))); |
| assert_eq!(m.opt_str("test").unwrap(), "20"); |
| assert!((m.opt_present("t"))); |
| assert_eq!(m.opt_str("t").unwrap(), "20"); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optopt_missing() { |
| let args = vec!["blah".to_string()]; |
| let opts = vec![optopt("t", "test", "testing", "TEST")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert!(!m.opt_present("test")); |
| assert!(!m.opt_present("t")); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optopt_no_arg() { |
| let long_args = vec!["--test".to_string()]; |
| let opts = vec![optopt("t", "test", "testing", "TEST")]; |
| let rs = getopts(&long_args, &opts); |
| match rs { |
| Err(ArgumentMissing(_)) => {} |
| _ => panic!(), |
| } |
| let short_args = vec!["-t".to_string()]; |
| match getopts(&short_args, &opts) { |
| Err(ArgumentMissing(_)) => {} |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optopt_multi() { |
| let args = vec!["--test=20".to_string(), "-t".to_string(), "30".to_string()]; |
| let opts = vec![optopt("t", "test", "testing", "TEST")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Err(OptionDuplicated(_)) => {} |
| _ => panic!(), |
| } |
| } |
| |
| // Tests for optflag |
| #[test] |
| fn test_optflag() { |
| let long_args = vec!["--test".to_string()]; |
| let opts = vec![optflag("t", "test", "testing")]; |
| let rs = getopts(&long_args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert!(m.opt_present("test")); |
| assert!(m.opt_present("t")); |
| } |
| _ => panic!(), |
| } |
| let short_args = vec!["-t".to_string()]; |
| match getopts(&short_args, &opts) { |
| Ok(ref m) => { |
| assert!(m.opt_present("test")); |
| assert!(m.opt_present("t")); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optflag_missing() { |
| let args = vec!["blah".to_string()]; |
| let opts = vec![optflag("t", "test", "testing")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert!(!m.opt_present("test")); |
| assert!(!m.opt_present("t")); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optflag_long_arg() { |
| let args = vec!["--test=20".to_string()]; |
| let opts = vec![optflag("t", "test", "testing")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Err(UnexpectedArgument(_)) => {} |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optflag_multi() { |
| let args = vec!["--test".to_string(), "-t".to_string()]; |
| let opts = vec![optflag("t", "test", "testing")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Err(OptionDuplicated(_)) => {} |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optflag_short_arg() { |
| let args = vec!["-t".to_string(), "20".to_string()]; |
| let opts = vec![optflag("t", "test", "testing")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| // The next variable after the flag is just a free argument |
| |
| assert!(m.free[0] == "20"); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| // Tests for optflagmulti |
| #[test] |
| fn test_optflagmulti_short1() { |
| let args = vec!["-v".to_string()]; |
| let opts = vec![optflagmulti("v", "verbose", "verbosity")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert_eq!(m.opt_count("v"), 1); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optflagmulti_short2a() { |
| let args = vec!["-v".to_string(), "-v".to_string()]; |
| let opts = vec![optflagmulti("v", "verbose", "verbosity")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert_eq!(m.opt_count("v"), 2); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optflagmulti_short2b() { |
| let args = vec!["-vv".to_string()]; |
| let opts = vec![optflagmulti("v", "verbose", "verbosity")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert_eq!(m.opt_count("v"), 2); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optflagmulti_long1() { |
| let args = vec!["--verbose".to_string()]; |
| let opts = vec![optflagmulti("v", "verbose", "verbosity")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert_eq!(m.opt_count("verbose"), 1); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optflagmulti_long2() { |
| let args = vec!["--verbose".to_string(), "--verbose".to_string()]; |
| let opts = vec![optflagmulti("v", "verbose", "verbosity")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert_eq!(m.opt_count("verbose"), 2); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optflagmulti_mix() { |
| let args = vec!["--verbose".to_string(), |
| "-v".to_string(), |
| "-vv".to_string(), |
| "verbose".to_string()]; |
| let opts = vec![optflagmulti("v", "verbose", "verbosity")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert_eq!(m.opt_count("verbose"), 4); |
| assert_eq!(m.opt_count("v"), 4); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| // Tests for optmulti |
| #[test] |
| fn test_optmulti() { |
| let long_args = vec!["--test=20".to_string()]; |
| let opts = vec![optmulti("t", "test", "testing", "TEST")]; |
| let rs = getopts(&long_args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert!((m.opt_present("test"))); |
| assert_eq!(m.opt_str("test").unwrap(), "20"); |
| assert!((m.opt_present("t"))); |
| assert_eq!(m.opt_str("t").unwrap(), "20"); |
| } |
| _ => panic!(), |
| } |
| let short_args = vec!["-t".to_string(), "20".to_string()]; |
| match getopts(&short_args, &opts) { |
| Ok(ref m) => { |
| assert!((m.opt_present("test"))); |
| assert_eq!(m.opt_str("test").unwrap(), "20"); |
| assert!((m.opt_present("t"))); |
| assert_eq!(m.opt_str("t").unwrap(), "20"); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optmulti_missing() { |
| let args = vec!["blah".to_string()]; |
| let opts = vec![optmulti("t", "test", "testing", "TEST")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert!(!m.opt_present("test")); |
| assert!(!m.opt_present("t")); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optmulti_no_arg() { |
| let long_args = vec!["--test".to_string()]; |
| let opts = vec![optmulti("t", "test", "testing", "TEST")]; |
| let rs = getopts(&long_args, &opts); |
| match rs { |
| Err(ArgumentMissing(_)) => {} |
| _ => panic!(), |
| } |
| let short_args = vec!["-t".to_string()]; |
| match getopts(&short_args, &opts) { |
| Err(ArgumentMissing(_)) => {} |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_optmulti_multi() { |
| let args = vec!["--test=20".to_string(), "-t".to_string(), "30".to_string()]; |
| let opts = vec![optmulti("t", "test", "testing", "TEST")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert!(m.opt_present("test")); |
| assert_eq!(m.opt_str("test").unwrap(), "20"); |
| assert!(m.opt_present("t")); |
| assert_eq!(m.opt_str("t").unwrap(), "20"); |
| let pair = m.opt_strs("test"); |
| assert!(pair[0] == "20"); |
| assert!(pair[1] == "30"); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_unrecognized_option() { |
| let long_args = vec!["--untest".to_string()]; |
| let opts = vec![optmulti("t", "test", "testing", "TEST")]; |
| let rs = getopts(&long_args, &opts); |
| match rs { |
| Err(UnrecognizedOption(_)) => {} |
| _ => panic!(), |
| } |
| let short_args = vec!["-u".to_string()]; |
| match getopts(&short_args, &opts) { |
| Err(UnrecognizedOption(_)) => {} |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_combined() { |
| let args = vec!["prog".to_string(), |
| "free1".to_string(), |
| "-s".to_string(), |
| "20".to_string(), |
| "free2".to_string(), |
| "--flag".to_string(), |
| "--long=30".to_string(), |
| "-f".to_string(), |
| "-m".to_string(), |
| "40".to_string(), |
| "-m".to_string(), |
| "50".to_string(), |
| "-n".to_string(), |
| "-A B".to_string(), |
| "-n".to_string(), |
| "-60 70".to_string()]; |
| let opts = vec![optopt("s", "something", "something", "SOMETHING"), |
| optflag("", "flag", "a flag"), |
| reqopt("", "long", "hi", "LONG"), |
| optflag("f", "", "another flag"), |
| optmulti("m", "", "mmmmmm", "YUM"), |
| optmulti("n", "", "nothing", "NOTHING"), |
| optopt("", "notpresent", "nothing to see here", "NOPE")]; |
| let rs = getopts(&args, &opts); |
| match rs { |
| Ok(ref m) => { |
| assert!(m.free[0] == "prog"); |
| assert!(m.free[1] == "free1"); |
| assert_eq!(m.opt_str("s").unwrap(), "20"); |
| assert!(m.free[2] == "free2"); |
| assert!((m.opt_present("flag"))); |
| assert_eq!(m.opt_str("long").unwrap(), "30"); |
| assert!((m.opt_present("f"))); |
| let pair = m.opt_strs("m"); |
| assert!(pair[0] == "40"); |
| assert!(pair[1] == "50"); |
| let pair = m.opt_strs("n"); |
| assert!(pair[0] == "-A B"); |
| assert!(pair[1] == "-60 70"); |
| assert!((!m.opt_present("notpresent"))); |
| } |
| _ => panic!(), |
| } |
| } |
| |
| #[test] |
| fn test_multi() { |
| let opts = vec![optopt("e", "", "encrypt", "ENCRYPT"), |
| optopt("", "encrypt", "encrypt", "ENCRYPT"), |
| optopt("f", "", "flag", "FLAG")]; |
| |
| let args_single = vec!["-e".to_string(), "foo".to_string()]; |
| let matches_single = &match getopts(&args_single, &opts) { |
| result::Result::Ok(m) => m, |
| result::Result::Err(_) => panic!(), |
| }; |
| assert!(matches_single.opts_present(&["e".to_string()])); |
| assert!(matches_single.opts_present(&["encrypt".to_string(), "e".to_string()])); |
| assert!(matches_single.opts_present(&["e".to_string(), "encrypt".to_string()])); |
| assert!(!matches_single.opts_present(&["encrypt".to_string()])); |
| assert!(!matches_single.opts_present(&["thing".to_string()])); |
| assert!(!matches_single.opts_present(&[])); |
| |
| assert_eq!(matches_single.opts_str(&["e".to_string()]).unwrap(), "foo"); |
| assert_eq!(matches_single.opts_str(&["e".to_string(), "encrypt".to_string()]).unwrap(), |
| "foo"); |
| assert_eq!(matches_single.opts_str(&["encrypt".to_string(), "e".to_string()]).unwrap(), |
| "foo"); |
| |
| let args_both = vec!["-e".to_string(), |
| "foo".to_string(), |
| "--encrypt".to_string(), |
| "foo".to_string()]; |
| let matches_both = &match getopts(&args_both, &opts) { |
| result::Result::Ok(m) => m, |
| result::Result::Err(_) => panic!(), |
| }; |
| assert!(matches_both.opts_present(&["e".to_string()])); |
| assert!(matches_both.opts_present(&["encrypt".to_string()])); |
| assert!(matches_both.opts_present(&["encrypt".to_string(), "e".to_string()])); |
| assert!(matches_both.opts_present(&["e".to_string(), "encrypt".to_string()])); |
| assert!(!matches_both.opts_present(&["f".to_string()])); |
| assert!(!matches_both.opts_present(&["thing".to_string()])); |
| assert!(!matches_both.opts_present(&[])); |
| |
| assert_eq!(matches_both.opts_str(&["e".to_string()]).unwrap(), "foo"); |
| assert_eq!(matches_both.opts_str(&["encrypt".to_string()]).unwrap(), |
| "foo"); |
| assert_eq!(matches_both.opts_str(&["e".to_string(), "encrypt".to_string()]).unwrap(), |
| "foo"); |
| assert_eq!(matches_both.opts_str(&["encrypt".to_string(), "e".to_string()]).unwrap(), |
| "foo"); |
| } |
| |
| #[test] |
| fn test_nospace() { |
| let args = vec!["-Lfoo".to_string(), "-M.".to_string()]; |
| let opts = vec![optmulti("L", "", "library directory", "LIB"), |
| optmulti("M", "", "something", "MMMM")]; |
| let matches = &match getopts(&args, &opts) { |
| result::Result::Ok(m) => m, |
| result::Result::Err(_) => panic!(), |
| }; |
| assert!(matches.opts_present(&["L".to_string()])); |
| assert_eq!(matches.opts_str(&["L".to_string()]).unwrap(), "foo"); |
| assert!(matches.opts_present(&["M".to_string()])); |
| assert_eq!(matches.opts_str(&["M".to_string()]).unwrap(), "."); |
| |
| } |
| |
| #[test] |
| fn test_nospace_conflict() { |
| let args = vec!["-vvLverbose".to_string(), "-v".to_string()]; |
| let opts = vec![optmulti("L", "", "library directory", "LIB"), |
| optflagmulti("v", "verbose", "Verbose")]; |
| let matches = &match getopts(&args, &opts) { |
| result::Result::Ok(m) => m, |
| result::Result::Err(e) => panic!("{}", e), |
| }; |
| assert!(matches.opts_present(&["L".to_string()])); |
| assert_eq!(matches.opts_str(&["L".to_string()]).unwrap(), "verbose"); |
| assert!(matches.opts_present(&["v".to_string()])); |
| assert_eq!(3, matches.opt_count("v")); |
| } |
| |
| #[test] |
| fn test_long_to_short() { |
| let mut short = Opt { |
| name: Name::Long("banana".to_string()), |
| hasarg: HasArg::Yes, |
| occur: Occur::Req, |
| aliases: Vec::new(), |
| }; |
| short.aliases = vec![Opt { |
| name: Name::Short('b'), |
| hasarg: HasArg::Yes, |
| occur: Occur::Req, |
| aliases: Vec::new(), |
| }]; |
| let verbose = reqopt("b", "banana", "some bananas", "VAL"); |
| |
| assert!(verbose.long_to_short() == short); |
| } |
| |
| #[test] |
| fn test_aliases_long_and_short() { |
| let opts = vec![optflagmulti("a", "apple", "Desc")]; |
| |
| let args = vec!["-a".to_string(), "--apple".to_string(), "-a".to_string()]; |
| |
| let matches = getopts(&args, &opts).unwrap(); |
| assert_eq!(3, matches.opt_count("a")); |
| assert_eq!(3, matches.opt_count("apple")); |
| } |
| |
| #[test] |
| fn test_usage() { |
| let optgroups = vec![reqopt("b", "banana", "Desc", "VAL"), |
| optopt("a", "012345678901234567890123456789", "Desc", "VAL"), |
| optflag("k", "kiwi", "Desc"), |
| optflagopt("p", "", "Desc", "VAL"), |
| optmulti("l", "", "Desc", "VAL")]; |
| |
| let expected = |
| "Usage: fruits |
| |
| Options: |
| -b --banana VAL Desc |
| -a --012345678901234567890123456789 VAL |
| Desc |
| -k --kiwi Desc |
| -p [VAL] Desc |
| -l VAL Desc |
| "; |
| |
| let generated_usage = usage("Usage: fruits", &optgroups); |
| |
| assert_eq!(generated_usage, expected); |
| } |
| |
| #[test] |
| fn test_usage_description_wrapping() { |
| // indentation should be 24 spaces |
| // lines wrap after 78: or rather descriptions wrap after 54 |
| |
| let optgroups = vec![optflag("k", |
| "kiwi", |
| // 54 |
| "This is a long description which won't be wrapped..+.."), |
| optflag("a", |
| "apple", |
| "This is a long description which _will_ be wrapped..+..")]; |
| |
| let expected = |
| "Usage: fruits |
| |
| Options: |
| -k --kiwi This is a long description which won't be wrapped..+.. |
| -a --apple This is a long description which _will_ be |
| wrapped..+.. |
| "; |
| |
| let usage = usage("Usage: fruits", &optgroups); |
| |
| assert!(usage == expected) |
| } |
| |
| #[test] |
| fn test_usage_description_multibyte_handling() { |
| let optgroups = vec![optflag("k", |
| "k\u{2013}w\u{2013}", |
| "The word kiwi is normally spelled with two i's"), |
| optflag("a", |
| "apple", |
| "This \u{201C}description\u{201D} has some characters that \ |
| could confuse the line wrapping; an apple costs 0.51€ in \ |
| some parts of Europe.")]; |
| |
| let expected = |
| "Usage: fruits |
| |
| Options: |
| -k --k–w– The word kiwi is normally spelled with two i's |
| -a --apple This “description” has some characters that could |
| confuse the line wrapping; an apple costs 0.51€ in |
| some parts of Europe. |
| "; |
| |
| let usage = usage("Usage: fruits", &optgroups); |
| |
| assert!(usage == expected) |
| } |
| |
| #[test] |
| fn test_short_usage() { |
| let optgroups = vec![reqopt("b", "banana", "Desc", "VAL"), |
| optopt("a", "012345678901234567890123456789", "Desc", "VAL"), |
| optflag("k", "kiwi", "Desc"), |
| optflagopt("p", "", "Desc", "VAL"), |
| optmulti("l", "", "Desc", "VAL")]; |
| |
| let expected = "Usage: fruits -b VAL [-a VAL] [-k] [-p [VAL]] [-l VAL]..".to_string(); |
| let generated_usage = short_usage("fruits", &optgroups); |
| |
| assert_eq!(generated_usage, expected); |
| } |
| |
| #[test] |
| fn test_args_with_equals() { |
| let args = vec!("--one".to_string(), "A=B".to_string(), |
| "--two=C=D".to_string()); |
| let opts = vec![optopt("o", "one", "One", "INFO"), |
| optopt("t", "two", "Two", "INFO")]; |
| let matches = &match getopts(&args, &opts) { |
| result::Result::Ok(m) => m, |
| result::Result::Err(e) => panic!("{}", e) |
| }; |
| assert_eq!(matches.opts_str(&["o".to_string()]).unwrap(), "A=B"); |
| assert_eq!(matches.opts_str(&["t".to_string()]).unwrap(), "C=D"); |
| } |
| } |
