1 // Copyright 2012 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 pub use syntax::diagnostic;
14 use driver::driver::{Input, FileInput, StrInput};
15 use driver::session::{Session, build_session};
20 use std::any::AnyRefExt;
24 use std::task::TaskBuilder;
28 use syntax::diagnostic::Emitter;
38 pub fn main_args(args: &[String]) -> int {
39 let owned_args = args.to_owned();
40 monitor(proc() run_compiler(owned_args.as_slice()));
44 static BUG_REPORT_URL: &'static str =
45 "http://doc.rust-lang.org/complement-bugreport.html";
47 fn run_compiler(args: &[String]) {
48 let matches = match handle_options(Vec::from_slice(args)) {
49 Some(matches) => matches,
52 let sopts = config::build_session_options(&matches);
54 let (input, input_file_path) = match matches.free.len() {
56 if sopts.describe_lints {
57 let mut ls = lint::LintStore::new();
58 ls.register_builtin(None);
59 describe_lints(&ls, false);
62 early_error("no input filename given");
65 let ifile = matches.free.get(0).as_slice();
67 let contents = io::stdin().read_to_end().unwrap();
68 let src = str::from_utf8(contents.as_slice()).unwrap()
72 (FileInput(Path::new(ifile)), Some(Path::new(ifile)))
75 _ => early_error("multiple input filenames provided")
78 let sess = build_session(sopts, input_file_path);
79 let cfg = config::build_configuration(&sess);
80 let odir = matches.opt_str("out-dir").map(|o| Path::new(o));
81 let ofile = matches.opt_str("o").map(|o| Path::new(o));
83 let pretty = matches.opt_default("pretty", "normal").map(|a| {
84 parse_pretty(&sess, a.as_slice())
87 Some::<PpMode>(ppm) => {
88 driver::pretty_print_input(sess, cfg, &input, ppm, ofile);
91 None::<PpMode> => {/* continue */ }
94 let r = matches.opt_strs("Z");
95 if r.contains(&("ls".to_string())) {
97 FileInput(ref ifile) => {
98 let mut stdout = io::stdout();
99 list_metadata(&sess, &(*ifile), &mut stdout).unwrap();
102 early_error("can not list metadata for stdin");
108 if print_crate_info(&sess, &input, &odir, &ofile) {
112 driver::compile_input(sess, cfg, &input, &odir, &ofile);
115 /// Prints version information and returns None on success or an error
116 /// message on failure.
117 pub fn version(binary: &str, matches: &getopts::Matches) -> Option<String> {
118 let verbose = match matches.opt_str("version").as_ref().map(|s| s.as_slice()) {
120 Some("verbose") => true,
121 Some(s) => return Some(format!("Unrecognized argument: {}", s))
124 println!("{} {}", binary, env!("CFG_VERSION"));
126 println!("binary: {}", binary);
127 println!("commit-hash: {}", option_env!("CFG_VER_HASH").unwrap_or("unknown"));
128 println!("commit-date: {}", option_env!("CFG_VER_DATE").unwrap_or("unknown"));
129 println!("host: {}", driver::host_triple());
130 println!("release: {}", env!("CFG_RELEASE"));
136 let message = format!("Usage: rustc [OPTIONS] INPUT");
139 -C help Print codegen options
140 -W help Print 'lint' options and default settings
141 -Z help Print internal options for debugging rustc\n",
142 getopts::usage(message.as_slice(),
143 config::optgroups().as_slice()));
146 fn describe_lints(lint_store: &lint::LintStore, loaded_plugins: bool) {
148 Available lint options:
149 -W <foo> Warn about <foo>
152 -F <foo> Forbid <foo> (deny, and deny all overrides)
156 fn sort_lints(lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
157 let mut lints: Vec<_> = lints.move_iter().map(|(x, _)| x).collect();
158 lints.sort_by(|x: &&Lint, y: &&Lint| {
159 match x.default_level.cmp(&y.default_level) {
160 // The sort doesn't case-fold but it's doubtful we care.
161 Equal => x.name.cmp(&y.name),
168 let (plugin, builtin) = lint_store.get_lints().partitioned(|&(_, p)| p);
169 let plugin = sort_lints(plugin);
170 let builtin = sort_lints(builtin);
172 // FIXME (#7043): We should use the width in character cells rather than
173 // the number of codepoints.
174 let max_name_len = plugin.iter().chain(builtin.iter())
175 .map(|&s| s.name.char_len())
177 let padded = |x: &str| {
178 " ".repeat(max_name_len - x.char_len()).append(x)
181 println!("Lint checks provided by rustc:\n");
182 println!(" {} {:7.7s} {}", padded("name"), "default", "meaning");
183 println!(" {} {:7.7s} {}", padded("----"), "-------", "-------");
185 let print_lints = |lints: Vec<&Lint>| {
186 for lint in lints.move_iter() {
187 let name = lint.name_lower().replace("_", "-");
188 println!(" {} {:7.7s} {}",
189 padded(name.as_slice()), lint.default_level.as_str(), lint.desc);
194 print_lints(builtin);
196 match (loaded_plugins, plugin.len()) {
198 println!("Compiler plugins can provide additional lints. To see a listing of these, \
199 re-run `rustc -W help` with a crate filename.");
201 (false, _) => fail!("didn't load lint plugins but got them anyway!"),
202 (true, 0) => println!("This crate does not load any lint plugins."),
204 println!("Lint checks provided by plugins loaded by this crate:\n");
210 fn describe_debug_flags() {
211 println!("\nAvailable debug options:\n");
212 let r = config::debugging_opts_map();
213 for tuple in r.iter() {
215 (ref name, ref desc, _) => {
216 println!(" -Z {:>20s} -- {}", *name, *desc);
222 fn describe_codegen_flags() {
223 println!("\nAvailable codegen options:\n");
224 let mut cg = config::basic_codegen_options();
225 for &(name, parser, desc) in config::CG_OPTIONS.iter() {
226 // we invoke the parser function on `None` to see if this option needs
227 // an argument or not.
228 let (width, extra) = if parser(&mut cg, None) {
233 println!(" -C {:>width$s}{} -- {}", name.replace("_", "-"),
234 extra, desc, width=width);
238 /// Process command line options. Emits messages as appropriate. If compilation
239 /// should continue, returns a getopts::Matches object parsed from args, otherwise
241 pub fn handle_options(mut args: Vec<String>) -> Option<getopts::Matches> {
242 // Throw away the first argument, the name of the binary
243 let _binary = args.shift().unwrap();
251 match getopts::getopts(args.as_slice(), config::optgroups().as_slice()) {
254 early_error(f.to_str().as_slice());
258 if matches.opt_present("h") || matches.opt_present("help") {
263 // Don't handle -W help here, because we might first load plugins.
265 let r = matches.opt_strs("Z");
266 if r.iter().any(|x| x.as_slice() == "help") {
267 describe_debug_flags();
271 let cg_flags = matches.opt_strs("C");
272 if cg_flags.iter().any(|x| x.as_slice() == "help") {
273 describe_codegen_flags();
277 if cg_flags.contains(&"passes=list".to_string()) {
278 unsafe { ::lib::llvm::llvm::LLVMRustPrintPasses(); }
282 if matches.opt_present("version") {
283 match version("rustc", &matches) {
284 Some(err) => early_error(err.as_slice()),
292 fn print_crate_info(sess: &Session,
295 ofile: &Option<Path>)
297 let (crate_id, crate_name, crate_file_name) = sess.opts.print_metas;
298 // these nasty nested conditions are to avoid doing extra work
299 if crate_id || crate_name || crate_file_name {
300 let attrs = parse_crate_attrs(sess, input);
301 let t_outputs = driver::build_output_filenames(input,
306 let id = link::find_crate_id(attrs.as_slice(),
307 t_outputs.out_filestem.as_slice());
310 println!("{}", id.to_str());
313 println!("{}", id.name);
316 let crate_types = driver::collect_crate_types(sess, attrs.as_slice());
317 for &style in crate_types.iter() {
318 let fname = link::filename_for_input(sess, style, &id,
319 &t_outputs.with_extension(""));
320 println!("{}", fname.filename_display());
335 PpmExpandedIdentified,
336 PpmFlowGraph(ast::NodeId),
339 pub fn parse_pretty(sess: &Session, name: &str) -> PpMode {
340 let mut split = name.splitn('=', 1);
341 let first = split.next().unwrap();
342 let opt_second = split.next();
343 match (opt_second, first) {
344 (None, "normal") => PpmNormal,
345 (None, "expanded") => PpmExpanded,
346 (None, "typed") => PpmTyped,
347 (None, "expanded,identified") => PpmExpandedIdentified,
348 (None, "identified") => PpmIdentified,
349 (arg, "flowgraph") => {
350 match arg.and_then(from_str) {
351 Some(id) => PpmFlowGraph(id),
353 sess.fatal(format!("`pretty flowgraph=<nodeid>` needs \
354 an integer <nodeid>; got {}",
355 arg.unwrap_or("nothing")).as_slice())
361 "argument to `pretty` must be one of `normal`, \
362 `expanded`, `flowgraph=<nodeid>`, `typed`, `identified`, \
363 or `expanded,identified`; got {}", name).as_slice());
368 fn parse_crate_attrs(sess: &Session, input: &Input) ->
369 Vec<ast::Attribute> {
370 let result = match *input {
371 FileInput(ref ifile) => {
372 parse::parse_crate_attrs_from_file(ifile,
376 StrInput(ref src) => {
377 parse::parse_crate_attrs_from_source_str(
378 driver::anon_src().to_string(),
384 result.move_iter().collect()
387 pub fn early_error(msg: &str) -> ! {
388 let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto);
389 emitter.emit(None, msg, diagnostic::Fatal);
390 fail!(diagnostic::FatalError);
393 pub fn list_metadata(sess: &Session, path: &Path,
394 out: &mut io::Writer) -> io::IoResult<()> {
395 metadata::loader::list_file_metadata(sess.targ_cfg.os, path, out)
398 /// Run a procedure which will detect failures in the compiler and print nicer
399 /// error messages rather than just failing the test.
401 /// The diagnostic emitter yielded to the procedure should be used for reporting
402 /// errors of the compiler.
403 fn monitor(f: proc():Send) {
404 // FIXME: This is a hack for newsched since it doesn't support split stacks.
405 // rustc needs a lot of stack! When optimizations are disabled, it needs
406 // even *more* stack than usual as well.
408 static STACK_SIZE: uint = 6000000; // 6MB
410 static STACK_SIZE: uint = 20000000; // 20MB
412 let (tx, rx) = channel();
413 let w = io::ChanWriter::new(tx);
414 let mut r = io::ChanReader::new(rx);
416 let mut task = TaskBuilder::new().named("rustc").stderr(box w);
418 // FIXME: Hacks on hacks. If the env is trying to override the stack size
419 // then *don't* set it explicitly.
420 if os::getenv("RUST_MIN_STACK").is_none() {
421 task = task.stack_size(STACK_SIZE);
425 Ok(()) => { /* fallthrough */ }
427 // Task failed without emitting a fatal diagnostic
428 if !value.is::<diagnostic::FatalError>() {
429 let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto);
431 // a .span_bug or .bug call has already printed what
432 // it wants to print.
433 if !value.is::<diagnostic::ExplicitBug>() {
436 "unexpected failure",
441 "the compiler hit an unexpected failure path. this is a bug.".to_string(),
442 format!("we would appreciate a bug report: {}",
444 "run with `RUST_BACKTRACE=1` for a backtrace".to_string(),
446 for note in xs.iter() {
447 emitter.emit(None, note.as_slice(), diagnostic::Note)
450 match r.read_to_str() {
451 Ok(s) => println!("{}", s),
454 format!("failed to read internal \
462 // Fail so the process returns a failure code, but don't pollute the
463 // output with some unnecessary failure messages, we've already
464 // printed everything that we needed to.
465 io::stdio::set_stderr(box io::util::NullWriter);