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;
23 use std::task::TaskBuilder;
27 use syntax::diagnostic::Emitter;
28 use syntax::diagnostics;
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,
53 let descriptions = diagnostics::registry::Registry::new(super::DIAGNOSTICS);
54 match matches.opt_str("explain") {
56 match descriptions.find_description(code.as_slice()) {
57 Some(ref description) => {
58 println!("{}", description);
61 early_error(format!("no extended information for {}", code).as_slice());
69 let sopts = config::build_session_options(&matches);
70 let (input, input_file_path) = match matches.free.len() {
72 if sopts.describe_lints {
73 let mut ls = lint::LintStore::new();
74 ls.register_builtin(None);
75 describe_lints(&ls, false);
78 early_error("no input filename given");
81 let ifile = matches.free.get(0).as_slice();
83 let contents = io::stdin().read_to_end().unwrap();
84 let src = String::from_utf8(contents).unwrap();
87 (FileInput(Path::new(ifile)), Some(Path::new(ifile)))
90 _ => early_error("multiple input filenames provided")
93 let sess = build_session(sopts, input_file_path, descriptions);
94 let cfg = config::build_configuration(&sess);
95 let odir = matches.opt_str("out-dir").map(|o| Path::new(o));
96 let ofile = matches.opt_str("o").map(|o| Path::new(o));
98 let pretty = matches.opt_default("pretty", "normal").map(|a| {
99 parse_pretty(&sess, a.as_slice())
102 Some::<PpMode>(ppm) => {
103 driver::pretty_print_input(sess, cfg, &input, ppm, ofile);
106 None::<PpMode> => {/* continue */ }
109 let r = matches.opt_strs("Z");
110 if r.contains(&("ls".to_string())) {
112 FileInput(ref ifile) => {
113 let mut stdout = io::stdout();
114 list_metadata(&sess, &(*ifile), &mut stdout).unwrap();
117 early_error("can not list metadata for stdin");
123 if print_crate_info(&sess, &input, &odir, &ofile) {
127 driver::compile_input(sess, cfg, &input, &odir, &ofile);
130 /// Prints version information and returns None on success or an error
131 /// message on failure.
132 pub fn version(binary: &str, matches: &getopts::Matches) -> Option<String> {
133 let verbose = match matches.opt_str("version").as_ref().map(|s| s.as_slice()) {
135 Some("verbose") => true,
136 Some(s) => return Some(format!("Unrecognized argument: {}", s))
139 println!("{} {}", binary, env!("CFG_VERSION"));
141 println!("binary: {}", binary);
142 println!("commit-hash: {}", option_env!("CFG_VER_HASH").unwrap_or("unknown"));
143 println!("commit-date: {}", option_env!("CFG_VER_DATE").unwrap_or("unknown"));
144 println!("host: {}", driver::host_triple());
145 println!("release: {}", env!("CFG_RELEASE"));
151 let message = format!("Usage: rustc [OPTIONS] INPUT");
154 -C help Print codegen options
155 -W help Print 'lint' options and default settings
156 -Z help Print internal options for debugging rustc\n",
157 getopts::usage(message.as_slice(),
158 config::optgroups().as_slice()));
161 fn describe_lints(lint_store: &lint::LintStore, loaded_plugins: bool) {
163 Available lint options:
164 -W <foo> Warn about <foo>
167 -F <foo> Forbid <foo> (deny, and deny all overrides)
171 fn sort_lints(lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
172 let mut lints: Vec<_> = lints.move_iter().map(|(x, _)| x).collect();
173 lints.sort_by(|x: &&Lint, y: &&Lint| {
174 match x.default_level.cmp(&y.default_level) {
175 // The sort doesn't case-fold but it's doubtful we care.
176 Equal => x.name.cmp(&y.name),
183 let (plugin, builtin) = lint_store.get_lints().partitioned(|&(_, p)| p);
184 let plugin = sort_lints(plugin);
185 let builtin = sort_lints(builtin);
187 // FIXME (#7043): We should use the width in character cells rather than
188 // the number of codepoints.
189 let max_name_len = plugin.iter().chain(builtin.iter())
190 .map(|&s| s.name.char_len())
192 let padded = |x: &str| {
193 " ".repeat(max_name_len - x.char_len()).append(x)
196 println!("Lint checks provided by rustc:\n");
197 println!(" {} {:7.7s} {}", padded("name"), "default", "meaning");
198 println!(" {} {:7.7s} {}", padded("----"), "-------", "-------");
200 let print_lints = |lints: Vec<&Lint>| {
201 for lint in lints.move_iter() {
202 let name = lint.name_lower().replace("_", "-");
203 println!(" {} {:7.7s} {}",
204 padded(name.as_slice()), lint.default_level.as_str(), lint.desc);
209 print_lints(builtin);
211 match (loaded_plugins, plugin.len()) {
213 println!("Compiler plugins can provide additional lints. To see a listing of these, \
214 re-run `rustc -W help` with a crate filename.");
216 (false, _) => fail!("didn't load lint plugins but got them anyway!"),
217 (true, 0) => println!("This crate does not load any lint plugins."),
219 println!("Lint checks provided by plugins loaded by this crate:\n");
225 fn describe_debug_flags() {
226 println!("\nAvailable debug options:\n");
227 let r = config::debugging_opts_map();
228 for tuple in r.iter() {
230 (ref name, ref desc, _) => {
231 println!(" -Z {:>20s} -- {}", *name, *desc);
237 fn describe_codegen_flags() {
238 println!("\nAvailable codegen options:\n");
239 let mut cg = config::basic_codegen_options();
240 for &(name, parser, desc) in config::CG_OPTIONS.iter() {
241 // we invoke the parser function on `None` to see if this option needs
242 // an argument or not.
243 let (width, extra) = if parser(&mut cg, None) {
248 println!(" -C {:>width$s}{} -- {}", name.replace("_", "-"),
249 extra, desc, width=width);
253 /// Process command line options. Emits messages as appropriate. If compilation
254 /// should continue, returns a getopts::Matches object parsed from args, otherwise
256 pub fn handle_options(mut args: Vec<String>) -> Option<getopts::Matches> {
257 // Throw away the first argument, the name of the binary
258 let _binary = args.shift().unwrap();
266 match getopts::getopts(args.as_slice(), config::optgroups().as_slice()) {
269 early_error(f.to_string().as_slice());
273 if matches.opt_present("h") || matches.opt_present("help") {
278 // Don't handle -W help here, because we might first load plugins.
280 let r = matches.opt_strs("Z");
281 if r.iter().any(|x| x.as_slice() == "help") {
282 describe_debug_flags();
286 let cg_flags = matches.opt_strs("C");
287 if cg_flags.iter().any(|x| x.as_slice() == "help") {
288 describe_codegen_flags();
292 if cg_flags.contains(&"passes=list".to_string()) {
293 unsafe { ::llvm::LLVMRustPrintPasses(); }
297 if matches.opt_present("version") {
298 match version("rustc", &matches) {
299 Some(err) => early_error(err.as_slice()),
307 fn print_crate_info(sess: &Session,
310 ofile: &Option<Path>)
312 let (crate_name, crate_file_name) = sess.opts.print_metas;
313 // these nasty nested conditions are to avoid doing extra work
314 if crate_name || crate_file_name {
315 let attrs = parse_crate_attrs(sess, input);
316 let t_outputs = driver::build_output_filenames(input,
321 let id = link::find_crate_name(Some(sess), attrs.as_slice(), input);
327 let crate_types = driver::collect_crate_types(sess, attrs.as_slice());
328 let metadata = driver::collect_crate_metadata(sess, attrs.as_slice());
329 *sess.crate_metadata.borrow_mut() = metadata;
330 for &style in crate_types.iter() {
331 let fname = link::filename_for_input(sess, style, id.as_slice(),
332 &t_outputs.with_extension(""));
333 println!("{}", fname.filename_display());
348 PpmExpandedIdentified,
349 PpmFlowGraph(ast::NodeId),
352 pub fn parse_pretty(sess: &Session, name: &str) -> PpMode {
353 let mut split = name.splitn('=', 1);
354 let first = split.next().unwrap();
355 let opt_second = split.next();
356 match (opt_second, first) {
357 (None, "normal") => PpmNormal,
358 (None, "expanded") => PpmExpanded,
359 (None, "typed") => PpmTyped,
360 (None, "expanded,identified") => PpmExpandedIdentified,
361 (None, "identified") => PpmIdentified,
362 (arg, "flowgraph") => {
363 match arg.and_then(from_str) {
364 Some(id) => PpmFlowGraph(id),
366 sess.fatal(format!("`pretty flowgraph=<nodeid>` needs \
367 an integer <nodeid>; got {}",
368 arg.unwrap_or("nothing")).as_slice())
374 "argument to `pretty` must be one of `normal`, \
375 `expanded`, `flowgraph=<nodeid>`, `typed`, `identified`, \
376 or `expanded,identified`; got {}", name).as_slice());
381 fn parse_crate_attrs(sess: &Session, input: &Input) ->
382 Vec<ast::Attribute> {
383 let result = match *input {
384 FileInput(ref ifile) => {
385 parse::parse_crate_attrs_from_file(ifile,
389 StrInput(ref src) => {
390 parse::parse_crate_attrs_from_source_str(
391 driver::anon_src().to_string(),
397 result.move_iter().collect()
400 pub fn early_error(msg: &str) -> ! {
401 let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto, None);
402 emitter.emit(None, msg, None, diagnostic::Fatal);
403 fail!(diagnostic::FatalError);
406 pub fn early_warn(msg: &str) {
407 let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto, None);
408 emitter.emit(None, msg, None, diagnostic::Warning);
411 pub fn list_metadata(sess: &Session, path: &Path,
412 out: &mut io::Writer) -> io::IoResult<()> {
413 metadata::loader::list_file_metadata(sess.targ_cfg.os, path, out)
416 /// Run a procedure which will detect failures in the compiler and print nicer
417 /// error messages rather than just failing the test.
419 /// The diagnostic emitter yielded to the procedure should be used for reporting
420 /// errors of the compiler.
421 fn monitor(f: proc():Send) {
422 // FIXME: This is a hack for newsched since it doesn't support split stacks.
423 // rustc needs a lot of stack! When optimizations are disabled, it needs
424 // even *more* stack than usual as well.
426 static STACK_SIZE: uint = 6000000; // 6MB
428 static STACK_SIZE: uint = 20000000; // 20MB
430 let (tx, rx) = channel();
431 let w = io::ChanWriter::new(tx);
432 let mut r = io::ChanReader::new(rx);
434 let mut task = TaskBuilder::new().named("rustc").stderr(box w);
436 // FIXME: Hacks on hacks. If the env is trying to override the stack size
437 // then *don't* set it explicitly.
438 if os::getenv("RUST_MIN_STACK").is_none() {
439 task = task.stack_size(STACK_SIZE);
443 Ok(()) => { /* fallthrough */ }
445 // Task failed without emitting a fatal diagnostic
446 if !value.is::<diagnostic::FatalError>() {
447 let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto, None);
449 // a .span_bug or .bug call has already printed what
450 // it wants to print.
451 if !value.is::<diagnostic::ExplicitBug>() {
454 "unexpected failure",
460 "the compiler hit an unexpected failure path. this is a bug.".to_string(),
461 format!("we would appreciate a bug report: {}",
463 "run with `RUST_BACKTRACE=1` for a backtrace".to_string(),
465 for note in xs.iter() {
466 emitter.emit(None, note.as_slice(), None, diagnostic::Note)
469 match r.read_to_string() {
470 Ok(s) => println!("{}", s),
473 format!("failed to read internal \
482 // Fail so the process returns a failure code, but don't pollute the
483 // output with some unnecessary failure messages, we've already
484 // printed everything that we needed to.
485 io::stdio::set_stderr(box io::util::NullWriter);