1 // Copyright 2015 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.
17 extern crate env_logger;
20 use rustfmt::{run, Input, Summary};
21 use rustfmt::config::Config;
23 use std::{env, error};
24 use std::fs::{self, File};
25 use std::io::{self, ErrorKind, Read, Write};
26 use std::path::{Path, PathBuf};
28 use getopts::{Matches, Options};
30 // Include git commit hash and worktree status; contents are like
31 // const COMMIT_HASH: Option<&'static str> = Some("c31a366");
32 // const WORKTREE_CLEAN: Option<bool> = Some(false);
33 // with `None` if running git failed, eg if it is not installed.
34 include!(concat!(env!("OUT_DIR"), "/git_info.rs"));
36 type FmtError = Box<error::Error + Send + Sync>;
37 type FmtResult<T> = std::result::Result<T, FmtError>;
39 /// Rustfmt operations.
41 /// Format files and their child modules.
44 config_path: Option<PathBuf>,
46 /// Print the help message.
48 // Print version information
50 /// Print detailed configuration help.
52 /// No file specified, read from stdin
55 config_path: Option<PathBuf>,
59 /// Parsed command line options.
60 #[derive(Clone, Debug, Default)]
64 write_mode: Option<String>,
65 file_lines: Option<String>,
69 fn from_matches(matches: &Matches) -> FmtResult<CliOptions> {
70 let mut options = CliOptions::default();
71 options.skip_children = matches.opt_present("skip-children");
72 options.verbose = matches.opt_present("verbose");
74 if let Some(write_mode) = matches.opt_str("write-mode") {
75 options.write_mode = Some(write_mode);
78 if let Some(file_lines) = matches.opt_str("file-lines") {
79 options.file_lines = Some(file_lines);
85 fn apply_to(&self, config: &mut Config) -> FmtResult<()> {
86 let bool_to_str = |b| if b { "true" } else { "false" };
88 .override_value("skip_children", bool_to_str(self.skip_children))?;
89 config.override_value("verbose", bool_to_str(self.verbose))?;
90 if let Some(ref write_mode) = self.write_mode {
91 config.override_value("write_mode", &write_mode)?;
93 if let Some(ref file_lines) = self.file_lines {
94 config.override_value("file_lines", &file_lines)?;
100 const CONFIG_FILE_NAMES: [&'static str; 2] = [".rustfmt.toml", "rustfmt.toml"];
102 /// Try to find a project file in the given directory and its parents. Returns the path of a the
103 /// nearest project file if one exists, or `None` if no project file was found.
104 fn lookup_project_file(dir: &Path) -> FmtResult<Option<PathBuf>> {
105 let mut current = if dir.is_relative() {
106 env::current_dir()?.join(dir)
111 current = fs::canonicalize(current)?;
114 for config_file_name in &CONFIG_FILE_NAMES {
115 let config_file = current.join(config_file_name);
116 match fs::metadata(&config_file) {
117 // Only return if it's a file to handle the unlikely situation of a directory named
119 Ok(ref md) if md.is_file() => return Ok(Some(config_file)),
120 // Return the error if it's something other than `NotFound`; otherwise we didn't
121 // find the project file yet, and continue searching.
123 if e.kind() != ErrorKind::NotFound {
124 return Err(FmtError::from(e));
131 // If the current directory has no parent, we're done searching.
138 fn open_config_file(file_path: &Path) -> FmtResult<(Config, Option<PathBuf>)> {
139 let mut file = File::open(&file_path)?;
140 let mut toml = String::new();
141 file.read_to_string(&mut toml)?;
142 match Config::from_toml(&toml) {
143 Ok(cfg) => Ok((cfg, Some(file_path.to_path_buf()))),
144 Err(err) => Err(FmtError::from(err)),
148 /// Resolve the config for input in `dir`.
150 /// Returns the `Config` to use, and the path of the project file if there was
152 fn resolve_config(dir: &Path) -> FmtResult<(Config, Option<PathBuf>)> {
153 let path = lookup_project_file(dir)?;
155 return Ok((Config::default(), None));
157 open_config_file(&path.unwrap())
160 /// read the given config file path recursively if present else read the project file path
161 fn match_cli_path_or_file(config_path: Option<PathBuf>,
163 -> FmtResult<(Config, Option<PathBuf>)> {
165 if let Some(config_file) = config_path {
166 let (toml, path) = open_config_file(config_file.as_ref())?;
168 return Ok((toml, path));
171 resolve_config(input_file)
174 fn make_opts() -> Options {
175 let mut opts = Options::new();
176 opts.optflag("h", "help", "show this message");
177 opts.optflag("V", "version", "show version information");
178 opts.optflag("v", "verbose", "print verbose output");
181 "mode to write in (not usable when piping from stdin)",
182 "[replace|overwrite|display|diff|coverage|checkstyle]");
183 opts.optflag("", "skip-children", "don't reformat child modules");
187 "show details of rustfmt configuration options");
190 "Recursively searches the given path for the rustfmt.toml config file. If not \
191 found reverts to the input file path",
192 "[Path for the configuration file]");
195 "Format specified line ranges. See README for more detail on the JSON format.",
201 fn execute(opts: &Options) -> FmtResult<Summary> {
202 let matches = opts.parse(env::args().skip(1))?;
204 match determine_operation(&matches)? {
206 print_usage(opts, "");
207 Summary::print_exit_codes();
210 Operation::Version => {
214 Operation::ConfigHelp => {
215 Config::print_docs();
218 Operation::Stdin { input, config_path } => {
219 // try to read config from local directory
220 let (mut config, _) = match_cli_path_or_file(config_path,
221 &env::current_dir().unwrap())?;
223 // write_mode is always Plain for Stdin.
224 config.override_value("write_mode", "Plain")?;
227 if let Some(ref file_lines) = matches.opt_str("file-lines") {
228 config.override_value("file-lines", file_lines)?;
229 for f in config.file_lines().files() {
231 println!("Warning: Extra file listed in file_lines option '{}'", f);
236 Ok(run(Input::Text(input), &config))
238 Operation::Format { files, config_path } => {
239 let options = CliOptions::from_matches(&matches)?;
241 let mut config = Config::default();
243 // Load the config path file if provided
244 if let Some(config_file) = config_path {
245 let (cfg_tmp, path_tmp) = open_config_file(config_file.as_ref())?;
249 options.apply_to(&mut config)?;
251 for f in config.file_lines().files() {
252 if !files.contains(&PathBuf::from(f)) {
253 println!("Warning: Extra file listed in file_lines option '{}'", f);
258 if let Some(path) = path.as_ref() {
259 println!("Using rustfmt config file {}", path.display());
263 let mut error_summary = Summary::new();
266 println!("Error: file `{}` does not exist", file.to_str().unwrap());
267 error_summary.add_operational_error();
268 } else if file.is_dir() {
269 println!("Error: `{}` is a directory", file.to_str().unwrap());
270 error_summary.add_operational_error();
272 // Check the file directory if the config-path could not be read or not provided
274 let (config_tmp, path_tmp) = resolve_config(file.parent().unwrap())?;
276 if let Some(path) = path_tmp.as_ref() {
277 println!("Using rustfmt config file {} for {}",
285 options.apply_to(&mut config)?;
286 error_summary.add(run(Input::File(file), &config));
295 let _ = env_logger::init();
297 let opts = make_opts();
299 let exit_code = match execute(&opts) {
301 if summary.has_operational_errors() {
303 } else if summary.has_parsing_errors() {
305 } else if summary.has_formatting_errors() {
307 } else if summary.has_diff {
308 // should only happen in diff mode
311 assert!(summary.has_no_errors());
316 print_usage(&opts, &e.to_string());
320 // Make sure standard output is flushed before we exit.
321 std::io::stdout().flush().unwrap();
323 // Exit with given exit code.
325 // NOTE: This immediately terminates the process without doing any cleanup,
326 // so make sure to finish all necessary cleanup before this is called.
327 std::process::exit(exit_code);
330 fn print_usage(opts: &Options, reason: &str) {
331 let reason = format!("{}\n\nusage: {} [options] <file>...",
333 env::args_os().next().unwrap().to_string_lossy());
334 println!("{}", opts.usage(&reason));
338 println!("{} ({}{})",
339 option_env!("CARGO_PKG_VERSION").unwrap_or("unknown"),
340 COMMIT_HASH.unwrap_or("git commit unavailable"),
341 match WORKTREE_CLEAN {
342 Some(false) => " worktree dirty",
347 fn determine_operation(matches: &Matches) -> FmtResult<Operation> {
348 if matches.opt_present("h") {
349 return Ok(Operation::Help);
352 if matches.opt_present("config-help") {
353 return Ok(Operation::ConfigHelp);
356 if matches.opt_present("version") {
357 return Ok(Operation::Version);
360 let config_path_not_found = |path: &str| -> FmtResult<Operation> {
361 Err(FmtError::from(format!("Error: unable to find a config file for the given path: `{}`",
365 // Read the config_path and convert to parent dir if a file is provided.
366 // If a config file cannot be found from the given path, return error.
367 let config_path: Option<PathBuf> = match matches.opt_str("config-path").map(PathBuf::from) {
368 Some(ref path) if !path.exists() => return config_path_not_found(path.to_str().unwrap()),
369 Some(ref path) if path.is_dir() => {
370 let mut config_file_path = None;
371 for config_file_name in &CONFIG_FILE_NAMES {
372 let temp_path = path.join(config_file_name);
373 if temp_path.is_file() {
374 config_file_path = Some(temp_path);
377 if config_file_path.is_some() {
380 return config_path_not_found(path.to_str().unwrap());
386 // if no file argument is supplied, read from stdin
387 if matches.free.is_empty() {
388 let mut buffer = String::new();
389 io::stdin().read_to_string(&mut buffer)?;
391 return Ok(Operation::Stdin {
393 config_path: config_path,
397 let files: Vec<_> = matches
401 let p = PathBuf::from(s);
402 // we will do comparison later, so here tries to canonicalize first
403 // to get the expected behavior.
404 p.canonicalize().unwrap_or(p)
408 Ok(Operation::Format {
410 config_path: config_path,