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::file_lines::FileLines;
22 use rustfmt::config::{Config, WriteMode};
24 use std::{env, error};
25 use std::fs::{self, File};
26 use std::io::{self, ErrorKind, Read, Write};
27 use std::path::{Path, PathBuf};
28 use std::str::FromStr;
30 use getopts::{Matches, Options};
32 // Include git commit hash and worktree status; contents are like
33 // const COMMIT_HASH: Option<&'static str> = Some("c31a366");
34 // const WORKTREE_CLEAN: Option<bool> = Some(false);
35 // with `None` if running git failed, eg if it is not installed.
36 include!(concat!(env!("OUT_DIR"), "/git_info.rs"));
38 type FmtError = Box<error::Error + Send + Sync>;
39 type FmtResult<T> = std::result::Result<T, FmtError>;
41 /// Rustfmt operations.
43 /// Format files and their child modules.
46 config_path: Option<PathBuf>,
48 /// Print the help message.
50 // Print version information
52 /// Print detailed configuration help.
54 /// No file specified, read from stdin
57 config_path: Option<PathBuf>,
61 /// Parsed command line options.
62 #[derive(Clone, Debug, Default)]
66 write_mode: Option<WriteMode>,
67 file_lines: FileLines, // Default is all lines in all files.
71 fn from_matches(matches: &Matches) -> FmtResult<CliOptions> {
72 let mut options = CliOptions::default();
73 options.skip_children = matches.opt_present("skip-children");
74 options.verbose = matches.opt_present("verbose");
76 if let Some(ref write_mode) = matches.opt_str("write-mode") {
77 if let Ok(write_mode) = WriteMode::from_str(write_mode) {
78 options.write_mode = Some(write_mode);
80 return Err(FmtError::from(format!("Invalid write-mode: {}", write_mode)));
84 if let Some(ref file_lines) = matches.opt_str("file-lines") {
85 options.file_lines = try!(file_lines.parse());
91 fn apply_to(self, config: &mut Config) {
92 config.skip_children = self.skip_children;
93 config.verbose = self.verbose;
94 config.file_lines = self.file_lines;
95 if let Some(write_mode) = self.write_mode {
96 config.write_mode = write_mode;
101 /// Try to find a project file in the given directory and its parents. Returns the path of a the
102 /// nearest project file if one exists, or `None` if no project file was found.
103 fn lookup_project_file(dir: &Path) -> FmtResult<Option<PathBuf>> {
104 let mut current = if dir.is_relative() {
105 try!(env::current_dir()).join(dir)
110 current = try!(fs::canonicalize(current));
113 let config_file = current.join("rustfmt.toml");
114 match fs::metadata(&config_file) {
115 // Only return if it's a file to handle the unlikely situation of a directory named
117 Ok(ref md) if md.is_file() => return Ok(Some(config_file)),
118 // Return the error if it's something other than `NotFound`; otherwise we didn't find
119 // the project file yet, and continue searching.
121 if e.kind() != ErrorKind::NotFound {
122 return Err(FmtError::from(e));
128 // If the current directory has no parent, we're done searching.
135 /// Resolve the config for input in `dir`.
137 /// Returns the `Config` to use, and the path of the project file if there was
139 fn resolve_config(dir: &Path) -> FmtResult<(Config, Option<PathBuf>)> {
140 let path = try!(lookup_project_file(dir));
142 return Ok((Config::default(), None));
144 let path = path.unwrap();
145 let mut file = try!(File::open(&path));
146 let mut toml = String::new();
147 try!(file.read_to_string(&mut toml));
148 Ok((Config::from_toml(&toml), Some(path)))
151 /// read the given config file path recursively if present else read the project file path
152 fn match_cli_path_or_file(config_path: Option<PathBuf>,
154 -> FmtResult<(Config, Option<PathBuf>)> {
156 if let Some(config_file) = config_path {
157 let (toml, path) = try!(resolve_config(config_file.as_ref()));
159 return Ok((toml, path));
162 resolve_config(input_file)
165 fn make_opts() -> Options {
166 let mut opts = Options::new();
167 opts.optflag("h", "help", "show this message");
168 opts.optflag("V", "version", "show version information");
169 opts.optflag("v", "verbose", "show progress");
172 "mode to write in (not usable when piping from stdin)",
173 "[replace|overwrite|display|diff|coverage|checkstyle]");
174 opts.optflag("", "skip-children", "don't reformat child modules");
178 "show details of rustfmt configuration options");
181 "Recursively searches the given path for the rustfmt.toml config file. If not \
182 found reverts to the input file path",
183 "[Path for the configuration file]");
186 "Format specified line ranges. See README for more detail on the JSON format.",
192 fn execute(opts: &Options) -> FmtResult<Summary> {
193 let matches = try!(opts.parse(env::args().skip(1)));
195 match try!(determine_operation(&matches)) {
197 print_usage(&opts, "");
200 Operation::Version => {
204 Operation::ConfigHelp => {
205 Config::print_docs();
208 Operation::Stdin { input, config_path } => {
209 // try to read config from local directory
210 let (mut config, _) = match_cli_path_or_file(config_path, &env::current_dir().unwrap())
211 .expect("Error resolving config");
213 // write_mode is always Plain for Stdin.
214 config.write_mode = WriteMode::Plain;
216 Ok(run(Input::Text(input), &config))
218 Operation::Format { mut files, config_path } => {
219 let options = try!(CliOptions::from_matches(&matches));
221 // Add any additional files that were specified via `--file-lines`.
222 files.extend(options.file_lines.files().cloned().map(PathBuf::from));
224 let mut config = Config::default();
226 // Load the config path file if provided
227 if let Some(config_file) = config_path {
228 let (cfg_tmp, path_tmp) = resolve_config(config_file.as_ref())
229 .expect(&format!("Error resolving config for {:?}", config_file));
233 if let Some(path) = path.as_ref() {
234 println!("Using rustfmt config file {}", path.display());
237 let mut error_summary = Summary::new();
239 // Check the file directory if the config-path could not be read or not provided
241 let (config_tmp, path_tmp) = resolve_config(file.parent().unwrap())
242 .expect(&format!("Error resolving config for {}", file.display()));
243 if let Some(path) = path_tmp.as_ref() {
244 println!("Using rustfmt config file {} for {}",
251 options.clone().apply_to(&mut config);
252 error_summary.add(run(Input::File(file), &config));
260 let _ = env_logger::init();
262 let opts = make_opts();
264 let exit_code = match execute(&opts) {
266 if summary.has_operational_errors() {
268 } else if summary.has_parsing_errors() {
270 } else if summary.has_formatting_errors() {
272 } else if summary.has_diff {
273 // should only happen in diff mode
276 assert!(summary.has_no_errors());
281 print_usage(&opts, &e.to_string());
285 // Make sure standard output is flushed before we exit.
286 std::io::stdout().flush().unwrap();
288 // Exit with given exit code.
290 // NOTE: This immediately terminates the process without doing any cleanup,
291 // so make sure to finish all necessary cleanup before this is called.
292 std::process::exit(exit_code);
295 fn print_usage(opts: &Options, reason: &str) {
296 let reason = format!("{}\nusage: {} [options] <file>...",
298 env::args_os().next().unwrap().to_string_lossy());
299 println!("{}", opts.usage(&reason));
303 println!("{} ({}{})",
304 option_env!("CARGO_PKG_VERSION").unwrap_or("unknown"),
305 COMMIT_HASH.unwrap_or("git commit unavailable"),
306 match WORKTREE_CLEAN {
307 Some(false) => " worktree dirty",
312 fn determine_operation(matches: &Matches) -> FmtResult<Operation> {
313 if matches.opt_present("h") {
314 return Ok(Operation::Help);
317 if matches.opt_present("config-help") {
318 return Ok(Operation::ConfigHelp);
321 if matches.opt_present("version") {
322 return Ok(Operation::Version);
325 // Read the config_path and convert to parent dir if a file is provided.
326 let config_path: Option<PathBuf> = matches.opt_str("config-path")
330 return dir.parent().map(|v| v.into());
335 // if no file argument is supplied and `--file-lines` is not specified, read from stdin
336 if matches.free.is_empty() && !matches.opt_present("file-lines") {
338 let mut buffer = String::new();
339 try!(io::stdin().read_to_string(&mut buffer));
341 return Ok(Operation::Stdin {
343 config_path: config_path,
347 // We append files from `--file-lines` later in `execute()`.
348 let files: Vec<_> = matches.free.iter().map(PathBuf::from).collect();
350 Ok(Operation::Format {
352 config_path: config_path,