1 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 extern crate env_logger;
15 extern crate rustfmt_nightly as rustfmt;
18 use std::path::{Path, PathBuf};
19 use std::process::Command;
20 use std::str::FromStr;
22 use getopts::{Matches, Options};
24 use rustfmt::{format_and_emit_report, load_config, Input};
26 fn prune_files(files: Vec<&str>) -> Vec<&str> {
27 let prefixes: Vec<_> = files
29 .filter(|f| f.ends_with("mod.rs") || f.ends_with("lib.rs"))
30 .map(|f| &f[..f.len() - 6])
33 let mut pruned_prefixes = vec![];
35 if p1.starts_with("src/bin/") || pruned_prefixes.iter().all(|p2| !p1.starts_with(p2)) {
36 pruned_prefixes.push(p1);
39 debug!("prefixes: {:?}", pruned_prefixes);
44 if f.ends_with("mod.rs") || f.ends_with("lib.rs") || f.starts_with("src/bin/") {
47 pruned_prefixes.iter().all(|pp| !f.starts_with(pp))
52 fn git_diff(commits: &str) -> String {
53 let mut cmd = Command::new("git");
56 cmd.arg(format!("HEAD~{}", commits));
58 let output = cmd.output().expect("Couldn't execute `git diff`");
59 String::from_utf8_lossy(&output.stdout).into_owned()
62 fn get_files(input: &str) -> Vec<&str> {
65 .filter(|line| line.starts_with("+++ b/") && line.ends_with(".rs"))
66 .map(|line| &line[6..])
70 fn fmt_files(files: &[&str]) -> i32 {
71 let (config, _) = load_config(Some(Path::new(".")), None).expect("couldn't load config");
73 let mut exit_code = 0;
75 let summary = format_and_emit_report(Input::File(PathBuf::from(file)), &config).unwrap();
76 if !summary.has_no_errors() {
83 fn uncommitted_files() -> Vec<String> {
84 let mut cmd = Command::new("git");
87 cmd.arg("--modified");
88 cmd.arg("--exclude-standard");
89 let output = cmd.output().expect("Couldn't execute Git");
90 let stdout = String::from_utf8_lossy(&output.stdout);
93 .filter(|s| s.ends_with(".rs"))
94 .map(|s| s.to_owned())
98 fn check_uncommitted() {
99 let uncommitted = uncommitted_files();
100 debug!("uncommitted files: {:?}", uncommitted);
101 if !uncommitted.is_empty() {
102 println!("Found untracked changes:");
103 for f in &uncommitted {
106 println!("Commit your work, or run with `-u`.");
107 println!("Exiting.");
108 std::process::exit(1);
112 fn make_opts() -> Options {
113 let mut opts = Options::new();
114 opts.optflag("h", "help", "show this message");
115 opts.optflag("c", "check", "check only, don't format (unimplemented)");
116 opts.optflag("u", "uncommitted", "format uncommitted files");
127 fn from_args(matches: &Matches, opts: &Options) -> Config {
128 // `--help` display help message and quit
129 if matches.opt_present("h") {
130 let message = format!(
131 "\nusage: {} <commits> [options]\n\n\
132 commits: number of commits to format, default: 1",
133 env::args_os().next().unwrap().to_string_lossy()
135 println!("{}", opts.usage(&message));
136 std::process::exit(0);
139 let mut config = Config {
140 commits: "1".to_owned(),
145 if matches.opt_present("c") {
150 if matches.opt_present("u") {
151 config.uncommitted = true;
154 if matches.free.len() > 1 {
155 panic!("unknown arguments, use `-h` for usage");
157 if matches.free.len() == 1 {
158 let commits = matches.free[0].trim();
159 if u32::from_str(commits).is_err() {
160 panic!("Couldn't parse number of commits");
162 config.commits = commits.to_owned();
172 let opts = make_opts();
173 let matches = opts.parse(env::args().skip(1))
174 .expect("Couldn't parse command line");
175 let config = Config::from_args(&matches, &opts);
177 if !config.uncommitted {
181 let stdout = git_diff(&config.commits);
182 let files = get_files(&stdout);
183 debug!("files: {:?}", files);
184 let files = prune_files(files);
185 debug!("pruned files: {:?}", files);
186 let exit_code = fmt_files(&files);
187 std::process::exit(exit_code);