From 3aeaf8467e5be201d3dcda77801d73015352af19 Mon Sep 17 00:00:00 2001 From: Zach Dziura Date: Tue, 28 Apr 2015 01:10:37 -0400 Subject: [PATCH] Version 0.1.0 --- .gitignore | 2 + Cargo.toml | 9 + GPLv3.md | 595 +++++++++++++++++++++++++++++++++++++++++++++++++ LGPLv3.md | 163 ++++++++++++++ README.md | 154 +++++++++++++ src/errors.rs | 40 ++++ src/lib.rs | 115 ++++++++++ src/matches.rs | 48 ++++ src/opts.rs | 53 +++++ tests/main.rs | 49 ++++ 10 files changed, 1228 insertions(+) create mode 100644 .gitignore create mode 100644 Cargo.toml create mode 100644 GPLv3.md create mode 100644 LGPLv3.md create mode 100644 README.md create mode 100644 src/errors.rs create mode 100644 src/lib.rs create mode 100644 src/matches.rs create mode 100644 src/opts.rs create mode 100644 tests/main.rs diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..4fffb2f --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +/target +/Cargo.lock diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..154c455 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,9 @@ +[package] + +name = "pirate" +version = "0.1.0" +authors = ["Zach Dziura "] +description = "A simple arrrguments parser" +repository = "https://github.com/zcdziura/pirate" +keywords = ["opts", "args", "parser", "getopts", "options", "arguments"] +license = "LGPL-3.0+" diff --git a/GPLv3.md b/GPLv3.md new file mode 100644 index 0000000..175443c --- /dev/null +++ b/GPLv3.md @@ -0,0 +1,595 @@ +GNU General Public License +========================== + +_Version 3, 29 June 2007_ +_Copyright © 2007 Free Software Foundation, Inc. <>_ + +Everyone is permitted to copy and distribute verbatim copies of this license +document, but changing it is not allowed. + +## Preamble + +The GNU General Public License is a free, copyleft license for software and other +kinds of works. + +The licenses for most software and other practical works are designed to take away +your freedom to share and change the works. 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Additional Terms + +“Additional permissions” are terms that supplement the terms of this +License by making exceptions from one or more of its conditions. Additional +permissions that are applicable to the entire Program shall be treated as though they +were included in this License, to the extent that they are valid under applicable +law. If additional permissions apply only to part of the Program, that part may be +used separately under those permissions, but the entire Program remains governed by +this License without regard to the additional permissions. + +When you convey a copy of a covered work, you may at your option remove any +additional permissions from that copy, or from any part of it. (Additional +permissions may be written to require their own removal in certain cases when you +modify the work.) 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Termination + +You may not propagate or modify a covered work except as expressly provided under +this License. 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No Surrender of Others' Freedom + +If conditions are imposed on you (whether by court order, agreement or otherwise) +that contradict the conditions of this License, they do not excuse you from the +conditions of this License. If you cannot convey a covered work so as to satisfy +simultaneously your obligations under this License and any other pertinent +obligations, then as a consequence you may not convey it at all. For example, if you +agree to terms that obligate you to collect a royalty for further conveying from +those to whom you convey the Program, the only way you could satisfy both those terms +and this License would be to refrain entirely from conveying the Program. + +### 13. Use with the GNU Affero General Public License + +Notwithstanding any other provision of this License, you have permission to link or +combine any covered work with a work licensed under version 3 of the GNU Affero +General Public License into a single combined work, and to convey the resulting work. +The terms of this License will continue to apply to the part which is the covered +work, but the special requirements of the GNU Affero General Public License, section +13, concerning interaction through a network will apply to the combination as such. + +### 14. Revised Versions of this License + +The Free Software Foundation may publish revised and/or new versions of the GNU +General Public License from time to time. Such new versions will be similar in spirit +to the present version, but may differ in detail to address new problems or concerns. + +Each version is given a distinguishing version number. If the Program specifies that +a certain numbered version of the GNU General Public License “or any later +version” applies to it, you have the option of following the terms and +conditions either of that numbered version or of any later version published by the +Free Software Foundation. If the Program does not specify a version number of the GNU +General Public License, you may choose any version ever published by the Free +Software Foundation. + +If the Program specifies that a proxy can decide which future versions of the GNU +General Public License can be used, that proxy's public statement of acceptance of a +version permanently authorizes you to choose that version for the Program. + +Later license versions may give you additional or different permissions. However, no +additional obligations are imposed on any author or copyright holder as a result of +your choosing to follow a later version. + +### 15. Disclaimer of Warranty + +THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. +EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER +EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE +QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE +DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + +### 16. Limitation of Liability + +IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY +COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS +PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, +INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE +PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE +OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE +WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + +### 17. Interpretation of Sections 15 and 16 + +If the disclaimer of warranty and limitation of liability provided above cannot be +given local legal effect according to their terms, reviewing courts shall apply local +law that most closely approximates an absolute waiver of all civil liability in +connection with the Program, unless a warranty or assumption of liability accompanies +a copy of the Program in return for a fee. + +_END OF TERMS AND CONDITIONS_ + +## How to Apply These Terms to Your New Programs + +If you develop a new program, and you want it to be of the greatest possible use to +the public, the best way to achieve this is to make it free software which everyone +can redistribute and change under these terms. + +To do so, attach the following notices to the program. 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Such new +versions will be similar in spirit to the present version, but may +differ in detail to address new problems or concerns. + +Each version is given a distinguishing version number. If the +Library as you received it specifies that a certain numbered version +of the GNU Lesser General Public License “or any later version” +applies to it, you have the option of following the terms and +conditions either of that published version or of any later version +published by the Free Software Foundation. If the Library as you +received it does not specify a version number of the GNU Lesser +General Public License, you may choose any version of the GNU Lesser +General Public License ever published by the Free Software Foundation. + +If the Library as you received it specifies that a proxy can decide +whether future versions of the GNU Lesser General Public License shall +apply, that proxy's public statement of acceptance of any version is +permanent authorization for you to choose that version for the +Library. diff --git a/README.md b/README.md new file mode 100644 index 0000000..9072940 --- /dev/null +++ b/README.md @@ -0,0 +1,154 @@ +Pirate +====== + +A command-line arrrrguments parser, written in Rust. + +Synopsis +-------- + +Most programs that provide a command-line interface use a special-purpose library to make the +process easier, such as the GNU Project's `getopt` library. The Rust team provides their own +alternative to `getopt`: `getopts`, which should win an award for the Most Originally Named Project +Ever. + +In all seriousness, `getopts` is a fantastic library that gives the developers all of the tools +necessary to create and interface with command-line arguments. However, with all that power comes +complexity. `getopts`, while straight forward to use, is verbose. The developer has to make repeated +method calls to add different command-line options. And while the only victim here is the +developer's wrists due to carpal tunnel, I felt that there was a better way to do things. + +Enter Pirate (which should totally usurp `getopts` for the award of Most Originally Named Project Ever). + +Installation +------------ + +Add this to your `Cargo.toml: + +``` +[dependencies] +pirate = "0.1.0" +``` + +and this to your crate root: + +```rust +extern crate getopts; +``` + +Usage +----- + +Using Pirate is simple. First, create an array slice defining all of the valid opts that your +program accepts: + +`let opts = &["o:", "l/long", ":arg"];` + +Opts are defined in a specific format: + + * Opts that have an associated argument must be followed by a colon (:). + * Opts with both a short and long form are separated by a slash (/). If an opt has an associated + argument, the colon must come after the long form, e.g. `"l/long:"`. + * Required program arguments have a preceding colon, e.g. `":arg"`. + * All other opts are defined normally, e.g. `"l"` is an opt in short form, `"long"` is an opt in + long form. + +Next, call the `pirate::parse()` function, passing in the environment arguments along with the slice +of opts that you defined: + +`let matches = pirate::parse(env::args(), opts);` + +Now, handle any errors that may have arisen from parsing: + +``` +let matches: Matches = match pirate::parse(env::args(), opts) { + Err(ref e) => { + println!("Error: {}", e); + help(); + return; + }, + Ok(m) => m +}; +``` + +Finally, you may want to check which arguments were passed to the program. Luckily, the `Matches` +struct provides several helpful methods for querying whether an argument was passed to the program +and what its value is. + +``` +fn get(arg: &str) -> Option<&String> // Returns a reference to the given arg, or None if not found + +fn has_arg(arg: &str) -> bool // Returns true if the arg exists, false if not + +fn keys() -> Keys // An iterator over all args passed to the program +``` + +Example +------- + +Here is a trivial example that gives a general idea about how to use `pirate`: + +```rust +extern crate pirate; + +use std::env; + +use pirate::Matches; + +fn main() { + let opts = &["n:", "b/boop", ":input"]; + + let matches: Matches = match pirate::parse(env::args(), opts) { + Err(ref e) => { + println!("Error: {}", e); + help(); + return; + }, + Ok(m) => m + }; + + // Print the program help if necessary + if matches.has_match("h") || matches.has_match("help") { + help(); + return; + } + + let input = matches.get("input").unwrap().parse::().unwrap(); + let num = match matches.get("n") { + Some(n) => n.parse::().unwrap(), + None => 1 + }; + + let sum = input + num; + + println!("{} + {} = {}", input, num, sum); + + if matches.has_match("b") || matches.has_match("boop") { + println!("Boop!!"); + } +} + +fn help() { + println!("usage: pirate-test [-n NUM] [-b|--boop] INPUT\n"); + + println!("Options:"); + println!(" -n NUM\tChange the default number that's added to the input"); + println!(" -b, --boop\tIt's a surprise!"); + + println!("\nRequired arguments:"); + println!(" INPUT\tWe're gonna manipulate this somehow, you'll see!"); +} +``` + +To Do +----- + +- [ ] Create a helper function for generation `--help` output, rather than having the user create it +manually. + - [ ] Also create helper functions for defining the description section of the `--help` output. +- [ ] Refactor the `ErrorKind` enum into a struct that is able to represent more complex data (such + giving the value of the invalid argument passed to the program). + +License +------- + +Pirate is licensed under the [GNU Lesser General Public License, v3](https://www.gnu.org/licenses/lgpl.html). diff --git a/src/errors.rs b/src/errors.rs new file mode 100644 index 0000000..90527c9 --- /dev/null +++ b/src/errors.rs @@ -0,0 +1,40 @@ +/* Pirate - A command-line arrrrguments parser, written in Rust. + * Copyright (C) 2015 Zachary Dziura + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +use std::error::Error; +use std::fmt::{Display, Formatter, Result}; + +#[derive(Debug)] +pub enum ErrorKind { + InvalidOption, + MissingArgument, +} + +impl Error for ErrorKind { + fn description(&self) -> &str { + match *self { + ErrorKind::InvalidOption => "An invalid option was passed to the program", + ErrorKind::MissingArgument => "A required argument is missing", + } + } +} + +impl Display for ErrorKind { + fn fmt(&self, f: &mut Formatter) -> Result { + write!(f, "{}", self.description()) + } +} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..eb13070 --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,115 @@ +/* Pirate - A command-line arrrrguments parser, written in Rust. + * Copyright (C) 2015 Zachary Dziura + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +pub mod errors; +pub mod matches; +mod opts; + +use std::env::Args; + +pub use errors::ErrorKind; +pub use matches::Matches; +use opts::Opts; + +pub fn parse(mut args: Args, options: &[&'static str]) -> Result { + let mut matches: Matches = Matches::new(); + + let mut opts: Opts = opts(options); // Jesus, this is redundant... + + args.next(); // Remove the program name from the list of program arguments + + let mut next_arg = args.next(); + while next_arg.is_some() { + let mut current_arg = next_arg.unwrap(); + let arg: String; + + if ¤t_arg[..1] == "-" { // Probably a opt + if current_arg.len() == 2 { // Short form opt + arg = String::from(¤t_arg[1..]); + } else { // Assuming it's a long form opt + //TODO: Handle cases where it may be a opt group + arg = String::from(¤t_arg[2..]); + } + + if opts.contains_opt(&arg) { + let has_arg: bool = *opts.get_opt(&arg).unwrap(); + + if has_arg { + // NOTE: The corresponding arg MUST be immediately following + current_arg = match args.next() { + None => { + return Err(ErrorKind::MissingArgument); + }, + Some(a) => a + }; + + matches.insert(&arg, ¤t_arg); + } else { + matches.insert(&arg, ""); + } + } else { + return Err(ErrorKind::InvalidOption); + } + + } else { // Probably a required arg + let arg_name: String = opts.get_arg().unwrap(); + matches.insert(&arg_name, ¤t_arg); + } + + next_arg = args.next(); + } + + Ok(matches) +} + +fn opts(opts: &[&'static str]) -> Opts { + let mut options = Opts::new(); + + for opt in opts.iter() { + let is_arg: bool = match &opt[..1] { + ":" => true, + _ => false + }; + + let has_arg: bool = match &opt[(opt.len() - 1)..] { + ":" => true, + _ => false + }; + + if is_arg { + options.insert_arg(&opt[1..]); + } else { + let option: &str; + + if has_arg { + option = &opt[..(opt.len() - 1)]; + } else { + option = *opt; + } + + for form in option.split("/") { + options.insert_opt(form, has_arg); + } + } + } + + // Push the obligatory "-h/--help" options + options.insert_opt("h", false); + options.insert_opt("help", false); + + options +} diff --git a/src/matches.rs b/src/matches.rs new file mode 100644 index 0000000..3d1ecc5 --- /dev/null +++ b/src/matches.rs @@ -0,0 +1,48 @@ +/* Pirate - A command-line arrrrguments parser, written in Rust. +* Copyright (C) 2015 Zachary Dziura +* +* This program is free software: you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation, either version 3 of the License, or +* (at your option) any later version. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with this program. If not, see . +*/ + +use std::collections::HashMap; +use std::collections::hash_map::Keys; + +pub struct Matches { + matches: HashMap, +} + +impl Matches { + pub fn new() -> Matches { + Matches { + matches: HashMap::new() + } + } + + pub fn insert(&mut self, arg: &str, value: &str) { + self.matches.insert(String::from(arg), String::from(value)); + } + + pub fn get(&self, arg: &str) -> Option<&String> { + self.matches.get(arg) + } + + pub fn has_arg(&self, arg: &str) -> bool { + let arg = String::from(arg); + self.matches.contains_key(&arg) + } + + pub fn args(&self) -> Keys { + self.matches.keys() + } +} diff --git a/src/opts.rs b/src/opts.rs new file mode 100644 index 0000000..42f7efa --- /dev/null +++ b/src/opts.rs @@ -0,0 +1,53 @@ +/* Pirate - A command-line arrrrguments parser, written in Rust. + * Copyright (C) 2015 Zachary Dziura + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +use std::collections::HashMap; +use std::collections::VecDeque; + +pub struct Opts { + pub opts: HashMap, + pub args: VecDeque, +} + +impl Opts { + pub fn new() -> Opts { + Opts { + opts: HashMap::new(), + args: VecDeque::new() + } + } + + pub fn insert_opt(&mut self, key: &str, value: bool) { + self.opts.insert(String::from(key), value); + } + + pub fn get_opt(&self, opt_name: &String) -> Option<&bool> { + self.opts.get(opt_name) + } + + pub fn contains_opt(&self, opt: &String) -> bool { + self.opts.contains_key(opt) + } + + pub fn insert_arg(&mut self, arg: &str) { + self.args.push_back(String::from(arg)); + } + + pub fn get_arg(&mut self) -> Option { + self.args.pop_front() + } +} diff --git a/tests/main.rs b/tests/main.rs new file mode 100644 index 0000000..96206cb --- /dev/null +++ b/tests/main.rs @@ -0,0 +1,49 @@ +extern crate pirate; + +use std::env; + +use pirate::Matches; + +fn main() { + let opts = &["n:", "b/boop", ":input"]; + + let matches: Matches = match pirate::parse(env::args(), opts) { + Err(ref e) => { + println!("Error: {}", e); + help(); + return; + }, + Ok(m) => m + }; + + // Print the program help if necessary + if matches.has_arg("h") || matches.has_arg("help") { + help(); + return; + } + + let input = matches.get("input").unwrap().parse::().unwrap(); + let num = match matches.get("n") { + Some(n) => n.parse::().unwrap(), + None => 1 + }; + + let sum = input + num; + + println!("{} + {} = {}", input, num, sum); + + if matches.has_arg("b") || matches.has_arg("boop") { + println!("Boop!!"); + } +} + +fn help() { + println!("usage: pirate-test [-n NUM] [-b|--boop] INPUT\n"); + + println!("Options:"); + println!(" -n NUM\tChange the default number that's added to the input"); + println!(" -b, --boop\tIt's a surprise!"); + + println!("\nRequired arguments:"); + println!(" INPUT\tWe're gonna manipulate this somehow, you'll see!"); +}