src/librustdoc/lib.rs

   1 #![doc(
   2     html_root_url = "https://doc.rust-lang.org/nightly/",
   3     html_playground_url = "https://play.rust-lang.org/"
   4 )]
   5 #![feature(rustc_private)]
   6 #![feature(arbitrary_self_types)]
   7 #![feature(box_patterns)]
   8 #![feature(box_syntax)]
   9 #![feature(in_band_lifetimes)]
  10 #![feature(nll)]
  11 #![feature(set_stdio)]
  12 #![feature(test)]
  13 #![feature(vec_remove_item)]
  14 #![feature(ptr_offset_from)]
  15 #![feature(crate_visibility_modifier)]
  16 #![feature(const_fn)]
  17 #![feature(drain_filter)]
  18 #![feature(never_type)]
  19 #![feature(unicode_internals)]
  20 #![recursion_limit = "256"]
  21
  22 extern crate env_logger;
  23 extern crate getopts;
  24 extern crate rustc;
  25 extern crate rustc_data_structures;
  26 extern crate rustc_driver;
  27 extern crate rustc_error_codes;
  28 extern crate rustc_expand;
  29 extern crate rustc_feature;
  30 extern crate rustc_hir;
  31 extern crate rustc_index;
  32 extern crate rustc_interface;
  33 extern crate rustc_lexer;
  34 extern crate rustc_lint;
  35 extern crate rustc_metadata;
  36 extern crate rustc_parse;
  37 extern crate rustc_resolve;
  38 extern crate rustc_span as rustc_span;
  39 extern crate rustc_target;
  40 extern crate rustc_typeck;
  41 extern crate syntax;
  42 extern crate test as testing;
  43 #[macro_use]
  44 extern crate log;
  45 extern crate rustc_errors as errors;
  46
  47 use std::default::Default;
  48 use std::env;
  49 use std::panic;
  50 use std::process;
  51
  52 use rustc::session::config::{make_crate_type_option, ErrorOutputType, RustcOptGroup};
  53 use rustc::session::{early_error, early_warn};
  54
  55 #[macro_use]
  56 mod externalfiles;
  57
  58 mod clean;
  59 mod config;
  60 mod core;
  61 mod docfs;
  62 mod doctree;
  63 mod fold;
  64 pub mod html {
  65     crate mod escape;
  66     crate mod format;
  67     crate mod highlight;
  68     crate mod item_type;
  69     crate mod layout;
  70     pub mod markdown;
  71     crate mod render;
  72     crate mod sources;
  73     crate mod static_files;
  74     crate mod toc;
  75 }
  76 mod markdown;
  77 mod passes;
  78 mod test;
  79 mod theme;
  80 mod visit_ast;
  81 mod visit_lib;
  82
  83 struct Output {
  84     krate: clean::Crate,
  85     renderinfo: html::render::RenderInfo,
  86     renderopts: config::RenderOptions,
  87 }
  88
  89 pub fn main() {
  90     let thread_stack_size: usize = if cfg!(target_os = "haiku") {
  91         16_000_000 // 16MB on Haiku
  92     } else {
  93         32_000_000 // 32MB on other platforms
  94     };
  95     rustc_driver::set_sigpipe_handler();
  96     env_logger::init_from_env("RUSTDOC_LOG");
  97     let res = std::thread::Builder::new()
  98         .stack_size(thread_stack_size)
  99         .spawn(move || get_args().map(|args| main_args(&args)).unwrap_or(1))
 100         .unwrap()
 101         .join()
 102         .unwrap_or(rustc_driver::EXIT_FAILURE);
 103     process::exit(res);
 104 }
 105
 106 fn get_args() -> Option<Vec<String>> {
 107     env::args_os()
 108         .enumerate()
 109         .map(|(i, arg)| {
 110             arg.into_string()
 111                 .map_err(|arg| {
 112                     early_warn(
 113                         ErrorOutputType::default(),
 114                         &format!("Argument {} is not valid Unicode: {:?}", i, arg),
 115                     );
 116                 })
 117                 .ok()
 118         })
 119         .collect()
 120 }
 121
 122 fn stable<F>(name: &'static str, f: F) -> RustcOptGroup
 123 where
 124     F: Fn(&mut getopts::Options) -> &mut getopts::Options + 'static,
 125 {
 126     RustcOptGroup::stable(name, f)
 127 }
 128
 129 fn unstable<F>(name: &'static str, f: F) -> RustcOptGroup
 130 where
 131     F: Fn(&mut getopts::Options) -> &mut getopts::Options + 'static,
 132 {
 133     RustcOptGroup::unstable(name, f)
 134 }
 135
 136 fn opts() -> Vec<RustcOptGroup> {
 137     vec![
 138         stable("h", |o| o.optflag("h", "help", "show this help message")),
 139         stable("V", |o| o.optflag("V", "version", "print rustdoc's version")),
 140         stable("v", |o| o.optflag("v", "verbose", "use verbose output")),
 141         stable("r", |o| {
 142             o.optopt("r", "input-format", "the input type of the specified file", "[rust]")
 143         }),
 144         stable("w", |o| o.optopt("w", "output-format", "the output type to write", "[html]")),
 145         stable("o", |o| o.optopt("o", "output", "where to place the output", "PATH")),
 146         stable("crate-name", |o| {
 147             o.optopt("", "crate-name", "specify the name of this crate", "NAME")
 148         }),
 149         make_crate_type_option(),
 150         stable("L", |o| {
 151             o.optmulti("L", "library-path", "directory to add to crate search path", "DIR")
 152         }),
 153         stable("cfg", |o| o.optmulti("", "cfg", "pass a --cfg to rustc", "")),
 154         stable("extern", |o| o.optmulti("", "extern", "pass an --extern to rustc", "NAME[=PATH]")),
 155         unstable("extern-html-root-url", |o| {
 156             o.optmulti("", "extern-html-root-url", "base URL to use for dependencies", "NAME=URL")
 157         }),
 158         stable("plugin-path", |o| o.optmulti("", "plugin-path", "removed", "DIR")),
 159         stable("C", |o| {
 160             o.optmulti("C", "codegen", "pass a codegen option to rustc", "OPT[=VALUE]")
 161         }),
 162         stable("passes", |o| {
 163             o.optmulti(
 164                 "",
 165                 "passes",
 166                 "list of passes to also run, you might want \
 167                         to pass it multiple times; a value of `list` \
 168                         will print available passes",
 169                 "PASSES",
 170             )
 171         }),
 172         stable("plugins", |o| o.optmulti("", "plugins", "removed", "PLUGINS")),
 173         stable("no-default", |o| o.optflag("", "no-defaults", "don't run the default passes")),
 174         stable("document-private-items", |o| {
 175             o.optflag("", "document-private-items", "document private items")
 176         }),
 177         stable("test", |o| o.optflag("", "test", "run code examples as tests")),
 178         stable("test-args", |o| {
 179             o.optmulti("", "test-args", "arguments to pass to the test runner", "ARGS")
 180         }),
 181         stable("target", |o| o.optopt("", "target", "target triple to document", "TRIPLE")),
 182         stable("markdown-css", |o| {
 183             o.optmulti(
 184                 "",
 185                 "markdown-css",
 186                 "CSS files to include via <link> in a rendered Markdown file",
 187                 "FILES",
 188             )
 189         }),
 190         stable("html-in-header", |o| {
 191             o.optmulti(
 192                 "",
 193                 "html-in-header",
 194                 "files to include inline in the <head> section of a rendered Markdown file \
 195                         or generated documentation",
 196                 "FILES",
 197             )
 198         }),
 199         stable("html-before-content", |o| {
 200             o.optmulti(
 201                 "",
 202                 "html-before-content",
 203                 "files to include inline between <body> and the content of a rendered \
 204                         Markdown file or generated documentation",
 205                 "FILES",
 206             )
 207         }),
 208         stable("html-after-content", |o| {
 209             o.optmulti(
 210                 "",
 211                 "html-after-content",
 212                 "files to include inline between the content and </body> of a rendered \
 213                         Markdown file or generated documentation",
 214                 "FILES",
 215             )
 216         }),
 217         unstable("markdown-before-content", |o| {
 218             o.optmulti(
 219                 "",
 220                 "markdown-before-content",
 221                 "files to include inline between <body> and the content of a rendered \
 222                         Markdown file or generated documentation",
 223                 "FILES",
 224             )
 225         }),
 226         unstable("markdown-after-content", |o| {
 227             o.optmulti(
 228                 "",
 229                 "markdown-after-content",
 230                 "files to include inline between the content and </body> of a rendered \
 231                         Markdown file or generated documentation",
 232                 "FILES",
 233             )
 234         }),
 235         stable("markdown-playground-url", |o| {
 236             o.optopt("", "markdown-playground-url", "URL to send code snippets to", "URL")
 237         }),
 238         stable("markdown-no-toc", |o| {
 239             o.optflag("", "markdown-no-toc", "don't include table of contents")
 240         }),
 241         stable("e", |o| {
 242             o.optopt(
 243                 "e",
 244                 "extend-css",
 245                 "To add some CSS rules with a given file to generate doc with your \
 246                       own theme. However, your theme might break if the rustdoc's generated HTML \
 247                       changes, so be careful!",
 248                 "PATH",
 249             )
 250         }),
 251         unstable("Z", |o| {
 252             o.optmulti("Z", "", "internal and debugging options (only on nightly build)", "FLAG")
 253         }),
 254         stable("sysroot", |o| o.optopt("", "sysroot", "Override the system root", "PATH")),
 255         unstable("playground-url", |o| {
 256             o.optopt(
 257                 "",
 258                 "playground-url",
 259                 "URL to send code snippets to, may be reset by --markdown-playground-url \
 260                       or `#![doc(html_playground_url=...)]`",
 261                 "URL",
 262             )
 263         }),
 264         unstable("display-warnings", |o| {
 265             o.optflag("", "display-warnings", "to print code warnings when testing doc")
 266         }),
 267         unstable("crate-version", |o| {
 268             o.optopt("", "crate-version", "crate version to print into documentation", "VERSION")
 269         }),
 270         unstable("sort-modules-by-appearance", |o| {
 271             o.optflag(
 272                 "",
 273                 "sort-modules-by-appearance",
 274                 "sort modules by where they appear in the \
 275                                                          program, rather than alphabetically",
 276             )
 277         }),
 278         stable("theme", |o| {
 279             o.optmulti(
 280                 "",
 281                 "theme",
 282                 "additional themes which will be added to the generated docs",
 283                 "FILES",
 284             )
 285         }),
 286         stable("check-theme", |o| {
 287             o.optmulti("", "check-theme", "check if given theme is valid", "FILES")
 288         }),
 289         unstable("resource-suffix", |o| {
 290             o.optopt(
 291                 "",
 292                 "resource-suffix",
 293                 "suffix to add to CSS and JavaScript files, e.g., \"light.css\" will become \
 294                       \"light-suffix.css\"",
 295                 "PATH",
 296             )
 297         }),
 298         stable("edition", |o| {
 299             o.optopt(
 300                 "",
 301                 "edition",
 302                 "edition to use when compiling rust code (default: 2015)",
 303                 "EDITION",
 304             )
 305         }),
 306         stable("color", |o| {
 307             o.optopt(
 308                 "",
 309                 "color",
 310                 "Configure coloring of output:
 311                                           auto   = colorize, if output goes to a tty (default);
 312                                           always = always colorize output;
 313                                           never  = never colorize output",
 314                 "auto|always|never",
 315             )
 316         }),
 317         stable("error-format", |o| {
 318             o.optopt(
 319                 "",
 320                 "error-format",
 321                 "How errors and other messages are produced",
 322                 "human|json|short",
 323             )
 324         }),
 325         stable("json", |o| {
 326             o.optopt("", "json", "Configure the structure of JSON diagnostics", "CONFIG")
 327         }),
 328         unstable("disable-minification", |o| {
 329             o.optflag("", "disable-minification", "Disable minification applied on JS files")
 330         }),
 331         stable("warn", |o| o.optmulti("W", "warn", "Set lint warnings", "OPT")),
 332         stable("allow", |o| o.optmulti("A", "allow", "Set lint allowed", "OPT")),
 333         stable("deny", |o| o.optmulti("D", "deny", "Set lint denied", "OPT")),
 334         stable("forbid", |o| o.optmulti("F", "forbid", "Set lint forbidden", "OPT")),
 335         stable("cap-lints", |o| {
 336             o.optmulti(
 337                 "",
 338                 "cap-lints",
 339                 "Set the most restrictive lint level. \
 340                  More restrictive lints are capped at this \
 341                  level. By default, it is at `forbid` level.",
 342                 "LEVEL",
 343             )
 344         }),
 345         unstable("index-page", |o| {
 346             o.optopt("", "index-page", "Markdown file to be used as index page", "PATH")
 347         }),
 348         unstable("enable-index-page", |o| {
 349             o.optflag("", "enable-index-page", "To enable generation of the index page")
 350         }),
 351         unstable("static-root-path", |o| {
 352             o.optopt(
 353                 "",
 354                 "static-root-path",
 355                 "Path string to force loading static files from in output pages. \
 356                       If not set, uses combinations of '../' to reach the documentation root.",
 357                 "PATH",
 358             )
 359         }),
 360         unstable("disable-per-crate-search", |o| {
 361             o.optflag(
 362                 "",
 363                 "disable-per-crate-search",
 364                 "disables generating the crate selector on the search box",
 365             )
 366         }),
 367         unstable("persist-doctests", |o| {
 368             o.optopt(
 369                 "",
 370                 "persist-doctests",
 371                 "Directory to persist doctest executables into",
 372                 "PATH",
 373             )
 374         }),
 375         unstable("generate-redirect-pages", |o| {
 376             o.optflag(
 377                 "",
 378                 "generate-redirect-pages",
 379                 "Generate extra pages to support legacy URLs and tool links",
 380             )
 381         }),
 382         unstable("show-coverage", |o| {
 383             o.optflag(
 384                 "",
 385                 "show-coverage",
 386                 "calculate percentage of public items with documentation",
 387             )
 388         }),
 389         unstable("enable-per-target-ignores", |o| {
 390             o.optflag(
 391                 "",
 392                 "enable-per-target-ignores",
 393                 "parse ignore-foo for ignoring doctests on a per-target basis",
 394             )
 395         }),
 396         unstable("runtool", |o| {
 397             o.optopt(
 398                 "",
 399                 "runtool",
 400                 "",
 401                 "The tool to run tests with when building for a different target than host",
 402             )
 403         }),
 404         unstable("runtool-arg", |o| {
 405             o.optmulti(
 406                 "",
 407                 "runtool-arg",
 408                 "",
 409                 "One (of possibly many) arguments to pass to the runtool",
 410             )
 411         }),
 412         unstable("test-builder", |o| {
 413             o.optflag(
 414                 "",
 415                 "test-builder",
 416                 "specified the rustc-like binary to use as the test builder",
 417             )
 418         }),
 419     ]
 420 }
 421
 422 fn usage(argv0: &str) {
 423     let mut options = getopts::Options::new();
 424     for option in opts() {
 425         (option.apply)(&mut options);
 426     }
 427     println!("{}", options.usage(&format!("{} [options] <input>", argv0)));
 428 }
 429
 430 fn main_args(args: &[String]) -> i32 {
 431     let mut options = getopts::Options::new();
 432     for option in opts() {
 433         (option.apply)(&mut options);
 434     }
 435     let matches = match options.parse(&args[1..]) {
 436         Ok(m) => m,
 437         Err(err) => {
 438             early_error(ErrorOutputType::default(), &err.to_string());
 439         }
 440     };
 441     let options = match config::Options::from_matches(&matches) {
 442         Ok(opts) => opts,
 443         Err(code) => return code,
 444     };
 445     rustc_interface::interface::default_thread_pool(options.edition, move || main_options(options))
 446 }
 447
 448 fn main_options(options: config::Options) -> i32 {
 449     let diag = core::new_handler(options.error_format, None, &options.debugging_options);
 450
 451     match (options.should_test, options.markdown_input()) {
 452         (true, true) => return markdown::test(options, &diag),
 453         (true, false) => return test::run(options),
 454         (false, true) => {
 455             return markdown::render(options.input, options.render_options, &diag, options.edition);
 456         }
 457         (false, false) => {}
 458     }
 459
 460     // need to move these items separately because we lose them by the time the closure is called,
 461     // but we can't crates the Handler ahead of time because it's not Send
 462     let diag_opts = (options.error_format, options.edition, options.debugging_options.clone());
 463     let show_coverage = options.show_coverage;
 464     rust_input(options, move |out| {
 465         if show_coverage {
 466             // if we ran coverage, bail early, we don't need to also generate docs at this point
 467             // (also we didn't load in any of the useful passes)
 468             return rustc_driver::EXIT_SUCCESS;
 469         }
 470
 471         let Output { krate, renderinfo, renderopts } = out;
 472         info!("going to format");
 473         let (error_format, edition, debugging_options) = diag_opts;
 474         let diag = core::new_handler(error_format, None, &debugging_options);
 475         match html::render::run(krate, renderopts, renderinfo, &diag, edition) {
 476             Ok(_) => rustc_driver::EXIT_SUCCESS,
 477             Err(e) => {
 478                 diag.struct_err(&format!("couldn't generate documentation: {}", e.error))
 479                     .note(&format!("failed to create or modify \"{}\"", e.file.display()))
 480                     .emit();
 481                 rustc_driver::EXIT_FAILURE
 482             }
 483         }
 484     })
 485 }
 486
 487 /// Interprets the input file as a rust source file, passing it through the
 488 /// compiler all the way through the analysis passes. The rustdoc output is then
 489 /// generated from the cleaned AST of the crate.
 490 ///
 491 /// This form of input will run all of the plug/cleaning passes
 492 fn rust_input<R, F>(options: config::Options, f: F) -> R
 493 where
 494     R: 'static + Send,
 495     F: 'static + Send + FnOnce(Output) -> R,
 496 {
 497     // First, parse the crate and extract all relevant information.
 498     info!("starting to run rustc");
 499
 500     let result = rustc_driver::catch_fatal_errors(move || {
 501         let crate_name = options.crate_name.clone();
 502         let crate_version = options.crate_version.clone();
 503         let (mut krate, renderinfo, renderopts) = core::run_core(options);
 504
 505         info!("finished with rustc");
 506
 507         if let Some(name) = crate_name {
 508             krate.name = name
 509         }
 510
 511         krate.version = crate_version;
 512
 513         f(Output { krate, renderinfo, renderopts })
 514     });
 515
 516     match result {
 517         Ok(output) => output,
 518         Err(_) => panic::resume_unwind(Box::new(errors::FatalErrorMarker)),
 519     }
 520 }