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);
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 pub fn version(command: &str) {
116 let vers = match option_env!("CFG_VERSION") {
118 None => "unknown version"
120 println!("{} {}", command, vers);
121 println!("host: {}", driver::host_triple());
125 let message = format!("Usage: rustc [OPTIONS] INPUT");
128 -C help Print codegen options
129 -W help Print 'lint' options and default settings
130 -Z help Print internal options for debugging rustc\n",
131 getopts::usage(message.as_slice(),
132 config::optgroups().as_slice()));
135 fn describe_lints(lint_store: &lint::LintStore) {
137 Available lint options:
138 -W <foo> Warn about <foo>
141 -F <foo> Forbid <foo> (deny, and deny all overrides)
145 fn sort_lints(lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
146 let mut lints: Vec<_> = lints.move_iter().map(|(x, _)| x).collect();
147 lints.sort_by(|x: &&Lint, y: &&Lint| {
148 match x.default_level.cmp(&y.default_level) {
149 // The sort doesn't case-fold but it's doubtful we care.
150 Equal => x.name.cmp(&y.name),
157 let (_plugin, builtin) = lint_store.get_lints().partitioned(|&(_, p)| p);
158 // let plugin = sort_lints(plugin);
159 let builtin = sort_lints(builtin);
161 // FIXME (#7043): We should use the width in character cells rather than
162 // the number of codepoints.
163 let max_name_len = builtin.iter()
164 .map(|&s| s.name.char_len())
166 let padded = |x: &str| {
167 " ".repeat(max_name_len - x.char_len()).append(x)
170 println!("Lint checks provided by rustc:\n");
171 println!(" {} {:7.7s} {}", padded("name"), "default", "meaning");
172 println!(" {} {:7.7s} {}", padded("----"), "-------", "-------");
174 let print_lints = |lints: Vec<&Lint>| {
175 for lint in lints.move_iter() {
176 let name = lint.name_lower().replace("_", "-");
177 println!(" {} {:7.7s} {}",
178 padded(name.as_slice()), lint.default_level.as_str(), lint.desc);
183 print_lints(builtin);
185 // Describe lint plugins here once they exist.
188 fn describe_debug_flags() {
189 println!("\nAvailable debug options:\n");
190 let r = config::debugging_opts_map();
191 for tuple in r.iter() {
193 (ref name, ref desc, _) => {
194 println!(" -Z {:>20s} -- {}", *name, *desc);
200 fn describe_codegen_flags() {
201 println!("\nAvailable codegen options:\n");
202 let mut cg = config::basic_codegen_options();
203 for &(name, parser, desc) in config::CG_OPTIONS.iter() {
204 // we invoke the parser function on `None` to see if this option needs
205 // an argument or not.
206 let (width, extra) = if parser(&mut cg, None) {
211 println!(" -C {:>width$s}{} -- {}", name.replace("_", "-"),
212 extra, desc, width=width);
216 /// Process command line options. Emits messages as appropriate. If compilation
217 /// should continue, returns a getopts::Matches object parsed from args, otherwise
219 pub fn handle_options(mut args: Vec<String>) -> Option<getopts::Matches> {
220 // Throw away the first argument, the name of the binary
221 let _binary = args.shift().unwrap();
229 match getopts::getopts(args.as_slice(), config::optgroups().as_slice()) {
232 early_error(f.to_str().as_slice());
236 if matches.opt_present("h") || matches.opt_present("help") {
241 // Don't handle -W help here, because we might first load plugins.
243 let r = matches.opt_strs("Z");
244 if r.iter().any(|x| x.as_slice() == "help") {
245 describe_debug_flags();
249 let cg_flags = matches.opt_strs("C");
250 if cg_flags.iter().any(|x| x.as_slice() == "help") {
251 describe_codegen_flags();
255 if cg_flags.contains(&"passes=list".to_string()) {
256 unsafe { ::lib::llvm::llvm::LLVMRustPrintPasses(); }
260 if matches.opt_present("v") || matches.opt_present("version") {
268 fn print_crate_info(sess: &Session,
271 ofile: &Option<Path>)
273 let (crate_id, crate_name, crate_file_name) = sess.opts.print_metas;
274 // these nasty nested conditions are to avoid doing extra work
275 if crate_id || crate_name || crate_file_name {
276 let attrs = parse_crate_attrs(sess, input);
277 let t_outputs = driver::build_output_filenames(input,
282 let id = link::find_crate_id(attrs.as_slice(),
283 t_outputs.out_filestem.as_slice());
286 println!("{}", id.to_str());
289 println!("{}", id.name);
292 let crate_types = driver::collect_crate_types(sess, attrs.as_slice());
293 for &style in crate_types.iter() {
294 let fname = link::filename_for_input(sess, style, &id,
295 &t_outputs.with_extension(""));
296 println!("{}", fname.filename_display());
311 PpmExpandedIdentified,
312 PpmFlowGraph(ast::NodeId),
315 pub fn parse_pretty(sess: &Session, name: &str) -> PpMode {
316 let mut split = name.splitn('=', 1);
317 let first = split.next().unwrap();
318 let opt_second = split.next();
319 match (opt_second, first) {
320 (None, "normal") => PpmNormal,
321 (None, "expanded") => PpmExpanded,
322 (None, "typed") => PpmTyped,
323 (None, "expanded,identified") => PpmExpandedIdentified,
324 (None, "identified") => PpmIdentified,
325 (arg, "flowgraph") => {
326 match arg.and_then(from_str) {
327 Some(id) => PpmFlowGraph(id),
329 sess.fatal(format!("`pretty flowgraph=<nodeid>` needs \
330 an integer <nodeid>; got {}",
331 arg.unwrap_or("nothing")).as_slice())
337 "argument to `pretty` must be one of `normal`, \
338 `expanded`, `flowgraph=<nodeid>`, `typed`, `identified`, \
339 or `expanded,identified`; got {}", name).as_slice());
344 fn parse_crate_attrs(sess: &Session, input: &Input) ->
345 Vec<ast::Attribute> {
346 let result = match *input {
347 FileInput(ref ifile) => {
348 parse::parse_crate_attrs_from_file(ifile,
352 StrInput(ref src) => {
353 parse::parse_crate_attrs_from_source_str(
354 driver::anon_src().to_string(),
360 result.move_iter().collect()
363 pub fn early_error(msg: &str) -> ! {
364 let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto);
365 emitter.emit(None, msg, diagnostic::Fatal);
366 fail!(diagnostic::FatalError);
369 pub fn list_metadata(sess: &Session, path: &Path,
370 out: &mut io::Writer) -> io::IoResult<()> {
371 metadata::loader::list_file_metadata(sess.targ_cfg.os, path, out)
374 /// Run a procedure which will detect failures in the compiler and print nicer
375 /// error messages rather than just failing the test.
377 /// The diagnostic emitter yielded to the procedure should be used for reporting
378 /// errors of the compiler.
379 fn monitor(f: proc():Send) {
380 // FIXME: This is a hack for newsched since it doesn't support split stacks.
381 // rustc needs a lot of stack! When optimizations are disabled, it needs
382 // even *more* stack than usual as well.
384 static STACK_SIZE: uint = 6000000; // 6MB
386 static STACK_SIZE: uint = 20000000; // 20MB
388 let (tx, rx) = channel();
389 let w = io::ChanWriter::new(tx);
390 let mut r = io::ChanReader::new(rx);
392 let mut task = TaskBuilder::new().named("rustc").stderr(box w);
394 // FIXME: Hacks on hacks. If the env is trying to override the stack size
395 // then *don't* set it explicitly.
396 if os::getenv("RUST_MIN_STACK").is_none() {
397 task = task.stack_size(STACK_SIZE);
401 Ok(()) => { /* fallthrough */ }
403 // Task failed without emitting a fatal diagnostic
404 if !value.is::<diagnostic::FatalError>() {
405 let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto);
407 // a .span_bug or .bug call has already printed what
408 // it wants to print.
409 if !value.is::<diagnostic::ExplicitBug>() {
412 "unexpected failure",
417 "the compiler hit an unexpected failure path. this is a bug.".to_string(),
418 format!("we would appreciate a bug report: {}",
420 "run with `RUST_BACKTRACE=1` for a backtrace".to_string(),
422 for note in xs.iter() {
423 emitter.emit(None, note.as_slice(), diagnostic::Note)
426 match r.read_to_str() {
427 Ok(s) => println!("{}", s),
430 format!("failed to read internal \
438 // Fail so the process returns a failure code, but don't pollute the
439 // output with some unnecessary failure messages, we've already
440 // printed everything that we needed to.
441 io::stdio::set_stderr(box io::util::NullWriter);