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.
15 extern crate rustfmt_nightly as rustfmt;
17 extern crate env_logger;
20 use rustfmt::{run, Input, Summary};
21 use rustfmt::file_lines::FileLines;
22 use rustfmt::config::{Config, WriteMode, get_toml_path};
24 use std::{env, error};
26 use std::io::{self, Read, Write};
27 use std::path::{Path, PathBuf};
28 use std::str::FromStr;
30 use getopts::{Matches, Options};
32 type FmtError = Box<error::Error + Send + Sync>;
33 type FmtResult<T> = std::result::Result<T, FmtError>;
35 /// Rustfmt operations.
37 /// Format files and their child modules.
40 config_path: Option<PathBuf>,
41 minimal_config_path: Option<String>,
43 /// Print the help message.
45 // Print version information
47 /// Print detailed configuration help.
49 /// Output default config to a file
50 ConfigOutputDefault { path: String },
51 /// No file specified, read from stdin
54 config_path: Option<PathBuf>,
58 /// Parsed command line options.
59 #[derive(Clone, Debug, Default)]
63 write_mode: Option<WriteMode>,
64 file_lines: FileLines, // Default is all lines in all files.
68 fn from_matches(matches: &Matches) -> FmtResult<CliOptions> {
69 let mut options = CliOptions::default();
70 options.skip_children = matches.opt_present("skip-children");
71 options.verbose = matches.opt_present("verbose");
73 if let Some(ref write_mode) = matches.opt_str("write-mode") {
74 if let Ok(write_mode) = WriteMode::from_str(write_mode) {
75 options.write_mode = Some(write_mode);
77 return Err(FmtError::from(
78 format!("Invalid write-mode: {}", write_mode),
82 println!("Warning: the default write-mode for Rustfmt will soon change to overwrite - this will not leave backups of changed files.");
85 if let Some(ref file_lines) = matches.opt_str("file-lines") {
86 options.file_lines = file_lines.parse()?;
92 fn apply_to(self, config: &mut Config) {
93 config.set().skip_children(self.skip_children);
94 config.set().verbose(self.verbose);
95 config.set().file_lines(self.file_lines);
96 if let Some(write_mode) = self.write_mode {
97 config.set().write_mode(write_mode);
102 /// read the given config file path recursively if present else read the project file path
103 fn match_cli_path_or_file(
104 config_path: Option<PathBuf>,
106 ) -> FmtResult<(Config, Option<PathBuf>)> {
108 if let Some(config_file) = config_path {
109 let toml = Config::from_toml_path(config_file.as_ref())?;
110 return Ok((toml, Some(config_file)));
112 Config::from_resolved_toml_path(input_file).map_err(|e| FmtError::from(e))
115 fn make_opts() -> Options {
116 let mut opts = Options::new();
117 opts.optflag("h", "help", "show this message");
118 opts.optflag("V", "version", "show version information");
119 opts.optflag("v", "verbose", "print verbose output");
123 "mode to write in (not usable when piping from stdin)",
124 "[replace|overwrite|display|diff|coverage|checkstyle]",
126 opts.optflag("", "skip-children", "don't reformat child modules");
131 "show details of rustfmt configuration options",
135 "dump-default-config",
136 "Dumps the default configuration to a file and exits.",
141 "dump-minimal-config",
142 "Dumps configuration options that were checked during formatting to a file.",
148 "Recursively searches the given path for the rustfmt.toml config file. If not \
149 found reverts to the input file path",
150 "[Path for the configuration file]",
155 "Format specified line ranges. See README for more detail on the JSON format.",
162 fn execute(opts: &Options) -> FmtResult<Summary> {
163 let matches = opts.parse(env::args().skip(1))?;
165 match determine_operation(&matches)? {
167 print_usage(opts, "");
168 Summary::print_exit_codes();
171 Operation::Version => {
175 Operation::ConfigHelp => {
176 Config::print_docs();
179 Operation::ConfigOutputDefault { path } => {
180 let mut file = File::create(path)?;
181 let toml = Config::default().all_options().to_toml()?;
182 file.write_all(toml.as_bytes())?;
185 Operation::Stdin { input, config_path } => {
186 // try to read config from local directory
187 let (mut config, _) =
188 match_cli_path_or_file(config_path, &env::current_dir().unwrap())?;
190 // write_mode is always Plain for Stdin.
191 config.set().write_mode(WriteMode::Plain);
194 if let Some(ref file_lines) = matches.opt_str("file-lines") {
195 config.set().file_lines(file_lines.parse()?);
196 for f in config.file_lines().files() {
198 println!("Warning: Extra file listed in file_lines option '{}'", f);
203 Ok(run(Input::Text(input), &config))
210 let options = CliOptions::from_matches(&matches)?;
212 for f in options.file_lines.files() {
213 if !files.contains(&PathBuf::from(f)) {
214 println!("Warning: Extra file listed in file_lines option '{}'", f);
218 let mut config = Config::default();
219 // Load the config path file if provided
220 if let Some(config_file) = config_path.as_ref() {
221 config = Config::from_toml_path(config_file.as_ref())?;
225 if let Some(path) = config_path.as_ref() {
226 println!("Using rustfmt config file {}", path.display());
230 let mut error_summary = Summary::new();
233 println!("Error: file `{}` does not exist", file.to_str().unwrap());
234 error_summary.add_operational_error();
235 } else if file.is_dir() {
236 println!("Error: `{}` is a directory", file.to_str().unwrap());
237 error_summary.add_operational_error();
239 // Check the file directory if the config-path could not be read or not provided
240 if config_path.is_none() {
241 let (config_tmp, path_tmp) =
242 Config::from_resolved_toml_path(file.parent().unwrap())?;
244 if let Some(path) = path_tmp.as_ref() {
246 "Using rustfmt config file {} for {}",
255 options.clone().apply_to(&mut config);
256 error_summary.add(run(Input::File(file), &config));
260 // If we were given a path via dump-minimal-config, output any options
261 // that were used during formatting as TOML.
262 if let Some(path) = minimal_config_path {
263 let mut file = File::create(path)?;
264 let toml = config.used_options().to_toml()?;
265 file.write_all(toml.as_bytes())?;
274 let _ = env_logger::init();
276 let opts = make_opts();
278 let exit_code = match execute(&opts) {
280 if summary.has_operational_errors() {
282 } else if summary.has_parsing_errors() {
284 } else if summary.has_formatting_errors() {
286 } else if summary.has_diff {
287 // should only happen in diff mode
290 assert!(summary.has_no_errors());
295 print_usage(&opts, &e.to_string());
299 // Make sure standard output is flushed before we exit.
300 std::io::stdout().flush().unwrap();
302 // Exit with given exit code.
304 // NOTE: This immediately terminates the process without doing any cleanup,
305 // so make sure to finish all necessary cleanup before this is called.
306 std::process::exit(exit_code);
309 fn print_usage(opts: &Options, reason: &str) {
310 let reason = format!(
311 "{}\n\nusage: {} [options] <file>...",
313 env::args_os().next().unwrap().to_string_lossy()
315 println!("{}", opts.usage(&reason));
321 env!("CARGO_PKG_VERSION"),
322 include_str!(concat!(env!("OUT_DIR"), "/commit-info.txt"))
326 fn determine_operation(matches: &Matches) -> FmtResult<Operation> {
327 if matches.opt_present("h") {
328 return Ok(Operation::Help);
331 if matches.opt_present("config-help") {
332 return Ok(Operation::ConfigHelp);
335 if let Some(path) = matches.opt_str("dump-default-config") {
336 return Ok(Operation::ConfigOutputDefault { path });
339 if matches.opt_present("version") {
340 return Ok(Operation::Version);
343 let config_path_not_found = |path: &str| -> FmtResult<Operation> {
344 Err(FmtError::from(format!(
345 "Error: unable to find a config file for the given path: `{}`",
350 // Read the config_path and convert to parent dir if a file is provided.
351 // If a config file cannot be found from the given path, return error.
352 let config_path: Option<PathBuf> = match matches.opt_str("config-path").map(PathBuf::from) {
353 Some(ref path) if !path.exists() => return config_path_not_found(path.to_str().unwrap()),
354 Some(ref path) if path.is_dir() => {
355 let config_file_path = get_toml_path(path)?;
356 if config_file_path.is_some() {
359 return config_path_not_found(path.to_str().unwrap());
365 // If no path is given, we won't output a minimal config.
366 let minimal_config_path = matches.opt_str("dump-minimal-config");
368 // if no file argument is supplied, read from stdin
369 if matches.free.is_empty() {
370 let mut buffer = String::new();
371 io::stdin().read_to_string(&mut buffer)?;
373 return Ok(Operation::Stdin {
375 config_path: config_path,
379 let files: Vec<_> = matches
383 let p = PathBuf::from(s);
384 // we will do comparison later, so here tries to canonicalize first
385 // to get the expected behavior.
386 p.canonicalize().unwrap_or(p)
390 Ok(Operation::Format {
392 config_path: config_path,
393 minimal_config_path: minimal_config_path,