src/librustdoc/lib.rs

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