2 html_root_url = "https://doc.rust-lang.org/nightly/",
3 html_playground_url = "https://play.rust-lang.org/"
5 #![feature(rustc_private)]
6 #![feature(array_methods)]
7 #![feature(box_patterns)]
8 #![feature(box_syntax)]
9 #![feature(in_band_lifetimes)]
12 #![feature(crate_visibility_modifier)]
13 #![feature(never_type)]
14 #![feature(once_cell)]
15 #![feature(type_ascription)]
16 #![feature(iter_intersperse)]
17 #![recursion_limit = "256"]
18 #![warn(rustc::internal)]
21 extern crate lazy_static;
25 // N.B. these need `extern crate` even in 2018 edition
26 // because they're loaded implicitly from the sysroot.
27 // The reason they're loaded from the sysroot is because
28 // the rustdoc artifacts aren't stored in rustc's cargo target directory.
29 // So if `rustc` was specified in Cargo.toml, this would spuriously rebuild crates.
31 // Dependencies listed in Cargo.toml do not need `extern crate`.
33 extern crate rustc_ast;
34 extern crate rustc_ast_lowering;
35 extern crate rustc_ast_pretty;
36 extern crate rustc_attr;
37 extern crate rustc_data_structures;
38 extern crate rustc_driver;
39 extern crate rustc_errors;
40 extern crate rustc_expand;
41 extern crate rustc_feature;
42 extern crate rustc_hir;
43 extern crate rustc_hir_pretty;
44 extern crate rustc_index;
45 extern crate rustc_infer;
46 extern crate rustc_interface;
47 extern crate rustc_lexer;
48 extern crate rustc_lint;
49 extern crate rustc_lint_defs;
50 extern crate rustc_metadata;
51 extern crate rustc_middle;
52 extern crate rustc_mir;
53 extern crate rustc_parse;
54 extern crate rustc_passes;
55 extern crate rustc_resolve;
56 extern crate rustc_session;
57 extern crate rustc_span as rustc_span;
58 extern crate rustc_target;
59 extern crate rustc_trait_selection;
60 extern crate rustc_typeck;
61 extern crate test as testing;
63 #[cfg(feature = "jemalloc")]
64 extern crate tikv_jemalloc_sys;
65 #[cfg(feature = "jemalloc")]
66 use tikv_jemalloc_sys as jemalloc_sys;
67 #[cfg(feature = "jemalloc")]
68 extern crate tikv_jemallocator;
69 #[cfg(feature = "jemalloc")]
70 use tikv_jemallocator as jemallocator;
72 use std::default::Default;
76 use rustc_driver::{abort_on_err, describe_lints};
77 use rustc_errors::ErrorReported;
78 use rustc_interface::interface;
79 use rustc_middle::ty::TyCtxt;
80 use rustc_session::config::{make_crate_type_option, ErrorOutputType, RustcOptGroup};
81 use rustc_session::getopts;
82 use rustc_session::{early_error, early_warn};
84 /// A macro to create a FxHashMap.
89 /// let letters = map!{"a" => "b", "c" => "d"};
92 /// Trailing commas are allowed.
93 /// Commas between elements are required (even if the expression is a block).
95 ($( $key: expr => $val: expr ),* $(,)*) => {{
96 let mut map = ::rustc_data_structures::fx::FxHashMap::default();
97 $( map.insert($key, $val); )*
115 // used by the error-index generator, so it needs to be public
125 // See docs in https://github.com/rust-lang/rust/blob/master/compiler/rustc/src/main.rs
126 // about jemallocator
127 #[cfg(feature = "jemalloc")]
129 static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
132 // See docs in https://github.com/rust-lang/rust/blob/master/compiler/rustc/src/main.rs
133 // about jemalloc-sys
134 #[cfg(feature = "jemalloc")]
136 use std::os::raw::{c_int, c_void};
139 static _F1: unsafe extern "C" fn(usize, usize) -> *mut c_void = jemalloc_sys::calloc;
141 static _F2: unsafe extern "C" fn(*mut *mut c_void, usize, usize) -> c_int =
142 jemalloc_sys::posix_memalign;
144 static _F3: unsafe extern "C" fn(usize, usize) -> *mut c_void = jemalloc_sys::aligned_alloc;
146 static _F4: unsafe extern "C" fn(usize) -> *mut c_void = jemalloc_sys::malloc;
148 static _F5: unsafe extern "C" fn(*mut c_void, usize) -> *mut c_void = jemalloc_sys::realloc;
150 static _F6: unsafe extern "C" fn(*mut c_void) = jemalloc_sys::free;
152 // On OSX, jemalloc doesn't directly override malloc/free, but instead
153 // registers itself with the allocator's zone APIs in a ctor. However,
154 // the linker doesn't seem to consider ctors as "used" when statically
155 // linking, so we need to explicitly depend on the function.
156 #[cfg(target_os = "macos")]
159 fn _rjem_je_zone_register();
163 static _F7: unsafe extern "C" fn() = _rjem_je_zone_register;
167 rustc_driver::set_sigpipe_handler();
168 rustc_driver::install_ice_hook();
170 // When using CI artifacts (with `download_stage1 = true`), tracing is unconditionally built
171 // with `--features=static_max_level_info`, which disables almost all rustdoc logging. To avoid
172 // this, compile our own version of `tracing` that logs all levels.
173 // NOTE: this compiles both versions of tracing unconditionally, because
174 // - The compile time hit is not that bad, especially compared to rustdoc's incremental times, and
175 // - Otherwise, there's no warning that logging is being ignored when `download_stage1 = true`.
176 // NOTE: The reason this doesn't show double logging when `download_stage1 = false` and
177 // `debug_logging = true` is because all rustc logging goes to its version of tracing (the one
178 // in the sysroot), and all of rustdoc's logging goes to its version (the one in Cargo.toml).
180 rustc_driver::init_env_logger("RUSTDOC_LOG");
182 let exit_code = rustc_driver::catch_with_exit_code(|| match get_args() {
183 Some(args) => main_args(&args),
184 _ => Err(ErrorReported),
186 process::exit(exit_code);
192 // FIXME remove these and use winapi 0.3 instead
193 // Duplicates: bootstrap/compile.rs, librustc_errors/emitter.rs, rustc_driver/lib.rs
195 fn stdout_isatty() -> bool {
197 unsafe { libc::isatty(libc::STDOUT_FILENO) != 0 }
201 fn stdout_isatty() -> bool {
203 use winapi::um::consoleapi::GetConsoleMode;
204 use winapi::um::processenv::GetStdHandle;
205 use winapi::um::winbase::STD_OUTPUT_HANDLE;
208 let handle = GetStdHandle(STD_OUTPUT_HANDLE);
210 GetConsoleMode(handle, &mut out) != 0
214 let color_logs = match std::env::var("RUSTDOC_LOG_COLOR") {
215 Ok(value) => match value.as_ref() {
218 "auto" => stdout_isatty(),
220 ErrorOutputType::default(),
222 "invalid log color value '{}': expected one of always, never, or auto",
227 Err(std::env::VarError::NotPresent) => stdout_isatty(),
228 Err(std::env::VarError::NotUnicode(_value)) => early_error(
229 ErrorOutputType::default(),
230 "non-Unicode log color value: expected one of always, never, or auto",
233 let filter = tracing_subscriber::EnvFilter::from_env("RUSTDOC_LOG");
234 let layer = tracing_tree::HierarchicalLayer::default()
235 .with_writer(io::stderr)
236 .with_indent_lines(true)
237 .with_ansi(color_logs)
240 .with_verbose_exit(true)
241 .with_verbose_entry(true)
242 .with_indent_amount(2);
243 #[cfg(parallel_compiler)]
244 let layer = layer.with_thread_ids(true).with_thread_names(true);
246 use tracing_subscriber::layer::SubscriberExt;
247 let subscriber = tracing_subscriber::Registry::default().with(filter).with(layer);
248 tracing::subscriber::set_global_default(subscriber).unwrap();
251 fn get_args() -> Option<Vec<String>> {
258 ErrorOutputType::default(),
259 &format!("Argument {} is not valid Unicode: {:?}", i, arg),
267 fn opts() -> Vec<RustcOptGroup> {
268 let stable: fn(_, fn(&mut getopts::Options) -> &mut _) -> _ = RustcOptGroup::stable;
269 let unstable: fn(_, fn(&mut getopts::Options) -> &mut _) -> _ = RustcOptGroup::unstable;
271 stable("h", |o| o.optflag("h", "help", "show this help message")),
272 stable("V", |o| o.optflag("V", "version", "print rustdoc's version")),
273 stable("v", |o| o.optflag("v", "verbose", "use verbose output")),
275 o.optopt("r", "input-format", "the input type of the specified file", "[rust]")
277 stable("w", |o| o.optopt("w", "output-format", "the output type to write", "[html]")),
278 stable("o", |o| o.optopt("o", "output", "where to place the output", "PATH")),
279 stable("crate-name", |o| {
280 o.optopt("", "crate-name", "specify the name of this crate", "NAME")
282 make_crate_type_option(),
284 o.optmulti("L", "library-path", "directory to add to crate search path", "DIR")
286 stable("cfg", |o| o.optmulti("", "cfg", "pass a --cfg to rustc", "")),
287 stable("extern", |o| o.optmulti("", "extern", "pass an --extern to rustc", "NAME[=PATH]")),
288 unstable("extern-html-root-url", |o| {
291 "extern-html-root-url",
292 "base URL to use for dependencies; for example, \
293 \"std=/doc\" links std::vec::Vec to /doc/std/vec/struct.Vec.html",
297 stable("plugin-path", |o| o.optmulti("", "plugin-path", "removed", "DIR")),
299 o.optmulti("C", "codegen", "pass a codegen option to rustc", "OPT[=VALUE]")
301 stable("passes", |o| {
305 "list of passes to also run, you might want to pass it multiple times; a value of \
306 `list` will print available passes",
310 stable("plugins", |o| o.optmulti("", "plugins", "removed", "PLUGINS")),
311 stable("no-default", |o| o.optflag("", "no-defaults", "don't run the default passes")),
312 stable("document-private-items", |o| {
313 o.optflag("", "document-private-items", "document private items")
315 unstable("document-hidden-items", |o| {
316 o.optflag("", "document-hidden-items", "document items that have doc(hidden)")
318 stable("test", |o| o.optflag("", "test", "run code examples as tests")),
319 stable("test-args", |o| {
320 o.optmulti("", "test-args", "arguments to pass to the test runner", "ARGS")
322 unstable("test-run-directory", |o| {
325 "test-run-directory",
326 "The working directory in which to run tests",
330 stable("target", |o| o.optopt("", "target", "target triple to document", "TRIPLE")),
331 stable("markdown-css", |o| {
335 "CSS files to include via <link> in a rendered Markdown file",
339 stable("html-in-header", |o| {
343 "files to include inline in the <head> section of a rendered Markdown file \
344 or generated documentation",
348 stable("html-before-content", |o| {
351 "html-before-content",
352 "files to include inline between <body> and the content of a rendered \
353 Markdown file or generated documentation",
357 stable("html-after-content", |o| {
360 "html-after-content",
361 "files to include inline between the content and </body> of a rendered \
362 Markdown file or generated documentation",
366 unstable("markdown-before-content", |o| {
369 "markdown-before-content",
370 "files to include inline between <body> and the content of a rendered \
371 Markdown file or generated documentation",
375 unstable("markdown-after-content", |o| {
378 "markdown-after-content",
379 "files to include inline between the content and </body> of a rendered \
380 Markdown file or generated documentation",
384 stable("markdown-playground-url", |o| {
385 o.optopt("", "markdown-playground-url", "URL to send code snippets to", "URL")
387 stable("markdown-no-toc", |o| {
388 o.optflag("", "markdown-no-toc", "don't include table of contents")
394 "To add some CSS rules with a given file to generate doc with your \
395 own theme. However, your theme might break if the rustdoc's generated HTML \
396 changes, so be careful!",
401 o.optmulti("Z", "", "internal and debugging options (only on nightly build)", "FLAG")
403 stable("sysroot", |o| o.optopt("", "sysroot", "Override the system root", "PATH")),
404 unstable("playground-url", |o| {
408 "URL to send code snippets to, may be reset by --markdown-playground-url \
409 or `#![doc(html_playground_url=...)]`",
413 unstable("display-warnings", |o| {
414 o.optflag("", "display-warnings", "to print code warnings when testing doc")
416 stable("crate-version", |o| {
417 o.optopt("", "crate-version", "crate version to print into documentation", "VERSION")
419 unstable("sort-modules-by-appearance", |o| {
422 "sort-modules-by-appearance",
423 "sort modules by where they appear in the program, rather than alphabetically",
426 stable("default-theme", |o| {
430 "Set the default theme. THEME should be the theme name, generally lowercase. \
431 If an unknown default theme is specified, the builtin default is used. \
432 The set of themes, and the rustdoc built-in default, are not stable.",
436 unstable("default-setting", |o| {
440 "Default value for a rustdoc setting (used when \"rustdoc-SETTING\" is absent \
441 from web browser Local Storage). If VALUE is not supplied, \"true\" is used. \
442 Supported SETTINGs and VALUEs are not documented and not stable.",
446 stable("theme", |o| {
450 "additional themes which will be added to the generated docs",
454 stable("check-theme", |o| {
455 o.optmulti("", "check-theme", "check if given theme is valid", "FILES")
457 unstable("resource-suffix", |o| {
461 "suffix to add to CSS and JavaScript files, e.g., \"light.css\" will become \
462 \"light-suffix.css\"",
466 stable("edition", |o| {
470 "edition to use when compiling rust code (default: 2015)",
474 stable("color", |o| {
478 "Configure coloring of output:
479 auto = colorize, if output goes to a tty (default);
480 always = always colorize output;
481 never = never colorize output",
485 stable("error-format", |o| {
489 "How errors and other messages are produced",
494 o.optopt("", "json", "Configure the structure of JSON diagnostics", "CONFIG")
496 unstable("disable-minification", |o| {
497 o.optflag("", "disable-minification", "Disable minification applied on JS files")
499 stable("warn", |o| o.optmulti("W", "warn", "Set lint warnings", "OPT")),
500 stable("allow", |o| o.optmulti("A", "allow", "Set lint allowed", "OPT")),
501 stable("deny", |o| o.optmulti("D", "deny", "Set lint denied", "OPT")),
502 stable("forbid", |o| o.optmulti("F", "forbid", "Set lint forbidden", "OPT")),
503 stable("cap-lints", |o| {
507 "Set the most restrictive lint level. \
508 More restrictive lints are capped at this \
509 level. By default, it is at `forbid` level.",
513 unstable("index-page", |o| {
514 o.optopt("", "index-page", "Markdown file to be used as index page", "PATH")
516 unstable("enable-index-page", |o| {
517 o.optflag("", "enable-index-page", "To enable generation of the index page")
519 unstable("static-root-path", |o| {
523 "Path string to force loading static files from in output pages. \
524 If not set, uses combinations of '../' to reach the documentation root.",
528 unstable("disable-per-crate-search", |o| {
531 "disable-per-crate-search",
532 "disables generating the crate selector on the search box",
535 unstable("persist-doctests", |o| {
539 "Directory to persist doctest executables into",
543 unstable("show-coverage", |o| {
547 "calculate percentage of public items with documentation",
550 unstable("enable-per-target-ignores", |o| {
553 "enable-per-target-ignores",
554 "parse ignore-foo for ignoring doctests on a per-target basis",
557 unstable("runtool", |o| {
562 "The tool to run tests with when building for a different target than host",
565 unstable("runtool-arg", |o| {
570 "One (of possibly many) arguments to pass to the runtool",
573 unstable("test-builder", |o| {
574 o.optopt("", "test-builder", "The rustc-like binary to use as the test builder", "PATH")
576 unstable("check", |o| o.optflag("", "check", "Run rustdoc checks")),
577 unstable("generate-redirect-map", |o| {
580 "generate-redirect-map",
581 "Generate JSON file at the top level instead of generating HTML redirection files",
584 unstable("print", |o| {
585 o.optmulti("", "print", "Rustdoc information to print on stdout", "[unversioned-files]")
587 unstable("emit", |o| {
591 "Comma separated list of types of output for rustdoc to emit",
592 "[unversioned-shared-resources,toolchain-shared-resources,invocation-specific]",
595 unstable("no-run", |o| o.optflag("", "no-run", "Compile doctests without running them")),
596 unstable("show-type-layout", |o| {
597 o.optflag("", "show-type-layout", "Include the memory layout of types in the docs")
602 fn usage(argv0: &str) {
603 let mut options = getopts::Options::new();
604 for option in opts() {
605 (option.apply)(&mut options);
607 println!("{}", options.usage(&format!("{} [options] <input>", argv0)));
608 println!(" @path Read newline separated options from `path`\n");
609 println!("More information available at https://doc.rust-lang.org/rustdoc/what-is-rustdoc.html")
612 /// A result type used by several functions under `main()`.
613 type MainResult = Result<(), ErrorReported>;
615 fn main_args(at_args: &[String]) -> MainResult {
616 let args = rustc_driver::args::arg_expand_all(at_args);
618 let mut options = getopts::Options::new();
619 for option in opts() {
620 (option.apply)(&mut options);
622 let matches = match options.parse(&args[1..]) {
625 early_error(ErrorOutputType::default(), &err.to_string());
629 // Note that we discard any distinction between different non-zero exit
630 // codes from `from_matches` here.
631 let options = match config::Options::from_matches(&matches) {
633 Err(code) => return if code == 0 { Ok(()) } else { Err(ErrorReported) },
635 rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals(
637 1, // this runs single-threaded, even in a parallel compiler
639 move || main_options(options),
643 fn wrap_return(diag: &rustc_errors::Handler, res: Result<(), String>) -> MainResult {
647 diag.struct_err(&err).emit();
653 fn run_renderer<'tcx, T: formats::FormatRenderer<'tcx>>(
655 renderopts: config::RenderOptions,
656 cache: formats::cache::Cache,
659 match formats::run_format::<T>(krate, renderopts, cache, tcx) {
663 tcx.sess.struct_err(&format!("couldn't generate documentation: {}", e.error));
664 let file = e.file.display().to_string();
668 msg.note(&format!("failed to create or modify \"{}\"", file)).emit()
675 fn main_options(options: config::Options) -> MainResult {
676 let diag = core::new_handler(options.error_format, None, &options.debugging_opts);
678 match (options.should_test, options.markdown_input()) {
679 (true, true) => return wrap_return(&diag, markdown::test(options)),
680 (true, false) => return doctest::run(options),
684 markdown::render(&options.input, options.render_options, options.edition),
690 // need to move these items separately because we lose them by the time the closure is called,
691 // but we can't create the Handler ahead of time because it's not Send
692 let show_coverage = options.show_coverage;
693 let run_check = options.run_check;
695 // First, parse the crate and extract all relevant information.
696 info!("starting to run rustc");
698 // Interpret the input file as a rust source file, passing it through the
699 // compiler all the way through the analysis passes. The rustdoc output is
700 // then generated from the cleaned AST of the crate. This runs all the
701 // plug/cleaning passes.
702 let crate_version = options.crate_version.clone();
704 let default_passes = options.default_passes;
705 let output_format = options.output_format;
706 // FIXME: fix this clone (especially render_options)
707 let manual_passes = options.manual_passes.clone();
708 let render_options = options.render_options.clone();
709 let config = core::create_config(options);
711 interface::create_compiler_and_run(config, |compiler| {
712 compiler.enter(|queries| {
713 let sess = compiler.session();
715 if sess.opts.describe_lints {
716 let (_, lint_store) = &*queries.register_plugins()?.peek();
717 describe_lints(sess, lint_store, true);
721 // We need to hold on to the complete resolver, so we cause everything to be
722 // cloned for the analysis passes to use. Suboptimal, but necessary in the
723 // current architecture.
724 let resolver = core::create_resolver(queries, &sess);
726 if sess.has_errors() {
727 sess.fatal("Compilation failed, aborting rustdoc");
730 let mut global_ctxt = abort_on_err(queries.global_ctxt(), sess).peek_mut();
732 global_ctxt.enter(|tcx| {
733 let (krate, render_opts, mut cache) = sess.time("run_global_ctxt", || {
734 core::run_global_ctxt(
743 info!("finished with rustc");
745 cache.crate_version = crate_version;
748 // if we ran coverage, bail early, we don't need to also generate docs at this point
749 // (also we didn't load in any of the useful passes)
751 } else if run_check {
752 // Since we're in "check" mode, no need to generate anything beyond this point.
756 info!("going to format");
757 match output_format {
758 config::OutputFormat::Html => sess.time("render_html", || {
759 run_renderer::<html::render::Context<'_>>(krate, render_opts, cache, tcx)
761 config::OutputFormat::Json => sess.time("render_json", || {
762 run_renderer::<json::JsonRenderer<'_>>(krate, render_opts, cache, tcx)