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// Copyright 2015 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.
//! Command-line interface of the rustbuild build system.
//!
//! This module implements the command-line parsing of the build system which
//! has various flags to configure how it's run.
use std::fs;
use std::path::PathBuf;
use std::process;
use std::slice;
use getopts::Options;
/// Deserialized version of all flags for this compile.
pub struct Flags {
pub verbose: bool,
pub stage: Option<u32>,
pub build: String,
pub host: Filter,
pub target: Filter,
pub step: Vec<String>,
pub config: Option<PathBuf>,
pub src: Option<PathBuf>,
pub jobs: Option<u32>,
pub args: Vec<String>,
pub clean: bool,
}
pub struct Filter {
values: Vec<String>,
}
impl Flags {
pub fn parse(args: &[String]) -> Flags {
let mut opts = Options::new();
opts.optflag("v", "verbose", "use verbose output");
opts.optopt("", "config", "TOML configuration file for build", "FILE");
opts.optmulti("", "host", "host targets to build", "HOST");
opts.reqopt("", "build", "build target of the stage0 compiler", "BUILD");
opts.optmulti("", "target", "targets to build", "TARGET");
opts.optmulti("s", "step", "build step to execute", "STEP");
opts.optopt("", "stage", "stage to build", "N");
opts.optopt("", "src", "path to repo root", "DIR");
opts.optopt("j", "jobs", "number of jobs to run in parallel", "JOBS");
opts.optflag("", "clean", "clean output directory");
opts.optflag("h", "help", "print this help message");
let usage = |n| -> ! {
let brief = format!("Usage: rust.py [options]");
print!("{}", opts.usage(&brief));
process::exit(n);
};
let m = opts.parse(args).unwrap_or_else(|e| {
println!("failed to parse options: {}", e);
usage(1);
});
if m.opt_present("h") {
usage(0);
}
let cfg_file = m.opt_str("config").map(PathBuf::from).or_else(|| {
if fs::metadata("config.toml").is_ok() {
Some(PathBuf::from("config.toml"))
} else {
None
}
});
Flags {
verbose: m.opt_present("v"),
clean: m.opt_present("clean"),
stage: m.opt_str("stage").map(|j| j.parse().unwrap()),
build: m.opt_str("build").unwrap(),
host: Filter { values: m.opt_strs("host") },
target: Filter { values: m.opt_strs("target") },
step: m.opt_strs("step"),
config: cfg_file,
src: m.opt_str("src").map(PathBuf::from),
jobs: m.opt_str("jobs").map(|j| j.parse().unwrap()),
args: m.free.clone(),
}
}
}
impl Filter {
pub fn contains(&self, name: &str) -> bool {
self.values.len() == 0 || self.values.iter().any(|s| s == name)
}
pub fn iter(&self) -> slice::Iter<String> {
self.values.iter()
}
}
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