1 // Copyright 2012-2014 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 #![crate_name = "rustdoc"]
13 #![desc = "rustdoc, the Rust documentation extractor"]
14 #![license = "MIT/ASL2"]
15 #![crate_type = "dylib"]
16 #![crate_type = "rlib"]
18 #![feature(globs, struct_variant, managed_boxes, macro_rules, phase)]
25 extern crate serialize;
27 extern crate "test" as testing;
29 #[phase(plugin, link)] extern crate log;
32 use std::io::{File, MemWriter};
33 use std::collections::HashMap;
34 use serialize::{json, Decodable, Encodable};
35 use externalfiles::ExternalHtml;
37 // reexported from `clean` so it can be easily updated with the mod itself
38 pub use clean::SCHEMA_VERSION;
44 pub mod externalfiles;
59 pub mod stability_summary;
64 type Pass = (&'static str, // name
65 fn(clean::Crate) -> plugins::PluginResult, // fn
66 &'static str); // description
68 static PASSES: &'static [Pass] = &[
69 ("strip-hidden", passes::strip_hidden,
70 "strips all doc(hidden) items from the output"),
71 ("unindent-comments", passes::unindent_comments,
72 "removes excess indentation on comments in order for markdown to like it"),
73 ("collapse-docs", passes::collapse_docs,
74 "concatenates all document attributes into one document attribute"),
75 ("strip-private", passes::strip_private,
76 "strips all private items from a crate which cannot be seen externally"),
79 static DEFAULT_PASSES: &'static [&'static str] = &[
86 local_data_key!(pub analysiskey: core::CrateAnalysis)
88 type Output = (clean::Crate, Vec<plugins::PluginJson> );
91 // Why run rustdoc in a separate task? That's a good question!
93 // We first begin our adventure at the ancient commit of e7c4fb69. In this
94 // commit it was discovered that the stack limit frobbing on windows ended
95 // up causing some syscalls to fail. This was worked around manually in the
98 // Our journey now continues with #13259 where it was discovered that this
99 // stack limit frobbing has the ability to affect nearly any syscall. Note
100 // that the key idea here is that there is currently no knowledge as to why
101 // this is happening or how to preserve it, fun times!
103 // Now we continue along to #16275 where it was discovered that --test on
104 // windows didn't work at all! Yet curiously rustdoc worked without --test.
105 // The exact reason that #16275 cropped up is that during the expansion
106 // phase the compiler attempted to open libstd to read out its macros. This
107 // invoked the LLVMRustOpenArchive shim which in turned went to LLVM to go
108 // open a file and read it. Lo and behold this function returned an error!
109 // It was then discovered that when the same fix mentioned in #13259 was
110 // applied, the error went away. The plot thickens!
112 // Remember that rustdoc works without --test, which raises the question of
113 // how because the --test and non --test paths are almost identical. The
114 // first thing both paths do is parse and expand a crate! It turns out that
115 // the difference is that --test runs on the *main task* while the normal
116 // path runs in subtask. It turns out that running --test in a sub task also
117 // fixes the problem!
119 // So, in summary, it is unknown why this is necessary, what it is
120 // preventing, or what the actual bug is. In the meantime, this allows
121 // --test to work on windows, which seems good, right? Fun times.
122 let (tx, rx) = channel();
124 std::os::set_exit_status(main_args(std::os::args().as_slice()));
128 // If the task failed, set an error'd exit status
129 if rx.recv_opt().is_err() {
130 std::os::set_exit_status(std::rt::DEFAULT_ERROR_CODE);
134 pub fn opts() -> Vec<getopts::OptGroup> {
137 optflag("h", "help", "show this help message"),
138 optflagopt("", "version", "print rustdoc's version", "verbose"),
139 optopt("r", "input-format", "the input type of the specified file",
141 optopt("w", "output-format", "the output type to write",
143 optopt("o", "output", "where to place the output", "PATH"),
144 optopt("", "crate-name", "specify the name of this crate", "NAME"),
145 optmulti("L", "library-path", "directory to add to crate search path",
147 optmulti("", "cfg", "pass a --cfg to rustc", ""),
148 optmulti("", "extern", "pass an --extern to rustc", "NAME=PATH"),
149 optmulti("", "plugin-path", "directory to load plugins from", "DIR"),
150 optmulti("", "passes", "space separated list of passes to also run, a \
151 value of `list` will print available passes",
153 optmulti("", "plugins", "space separated list of plugins to also load",
155 optflag("", "no-defaults", "don't run the default passes"),
156 optflag("", "test", "run code examples as tests"),
157 optmulti("", "test-args", "arguments to pass to the test runner",
159 optopt("", "target", "target triple to document", "TRIPLE"),
160 optmulti("", "markdown-css", "CSS files to include via <link> in a rendered Markdown file",
162 optmulti("", "html-in-header",
163 "files to include inline in the <head> section of a rendered Markdown file \
164 or generated documentation",
166 optmulti("", "html-before-content",
167 "files to include inline between <body> and the content of a rendered \
168 Markdown file or generated documentation",
170 optmulti("", "html-after-content",
171 "files to include inline between the content and </body> of a rendered \
172 Markdown file or generated documentation",
174 optopt("", "markdown-playground-url",
175 "URL to send code snippets to", "URL"),
176 optflag("", "markdown-no-toc", "don't include table of contents")
180 pub fn usage(argv0: &str) {
182 getopts::usage(format!("{} [options] <input>", argv0).as_slice(),
186 pub fn main_args(args: &[String]) -> int {
187 let matches = match getopts::getopts(args.tail(), opts().as_slice()) {
194 if matches.opt_present("h") || matches.opt_present("help") {
195 usage(args[0].as_slice());
197 } else if matches.opt_present("version") {
198 match rustc::driver::version("rustdoc", &matches) {
207 if matches.opt_strs("passes").as_slice() == &["list".to_string()] {
208 println!("Available passes for running rustdoc:");
209 for &(name, _, description) in PASSES.iter() {
210 println!("{:>20s} - {}", name, description);
212 println!("{}", "\nDefault passes for rustdoc:"); // FIXME: #9970
213 for &name in DEFAULT_PASSES.iter() {
214 println!("{:>20s}", name);
219 if matches.free.len() == 0 {
220 println!("expected an input file to act on");
222 } if matches.free.len() > 1 {
223 println!("only one input file may be specified");
226 let input = matches.free[0].as_slice();
228 let libs = matches.opt_strs("L").iter().map(|s| Path::new(s.as_slice())).collect();
229 let externs = match parse_externs(&matches) {
237 let test_args = matches.opt_strs("test-args");
238 let test_args: Vec<String> = test_args.iter()
239 .flat_map(|s| s.as_slice().words())
240 .map(|s| s.to_string())
243 let should_test = matches.opt_present("test");
244 let markdown_input = input.ends_with(".md") || input.ends_with(".markdown");
246 let output = matches.opt_str("o").map(|s| Path::new(s));
247 let cfgs = matches.opt_strs("cfg");
249 let external_html = match ExternalHtml::load(
250 matches.opt_strs("html-in-header").as_slice(),
251 matches.opt_strs("html-before-content").as_slice(),
252 matches.opt_strs("html-after-content").as_slice()) {
256 let crate_name = matches.opt_str("crate-name");
258 match (should_test, markdown_input) {
260 return markdown::test(input, libs, externs, test_args)
263 return test::run(input, cfgs, libs, externs, test_args, crate_name)
265 (false, true) => return markdown::render(input, output.unwrap_or(Path::new("doc")),
266 &matches, &external_html,
267 !matches.opt_present("markdown-no-toc")),
271 let (krate, res) = match acquire_input(input, externs, &matches) {
274 println!("input error: {}", s);
279 info!("going to format");
280 let started = time::precise_time_ns();
281 match matches.opt_str("w").as_ref().map(|s| s.as_slice()) {
282 Some("html") | None => {
283 match html::render::run(krate, &external_html, output.unwrap_or(Path::new("doc"))) {
285 Err(e) => fail!("failed to generate documentation: {}", e),
289 match json_output(krate, res, output.unwrap_or(Path::new("doc.json"))) {
291 Err(e) => fail!("failed to write json: {}", e),
295 println!("unknown output format: {}", s);
299 let ended = time::precise_time_ns();
300 info!("Took {:.03f}s", (ended as f64 - started as f64) / 1e9f64);
305 /// Looks inside the command line arguments to extract the relevant input format
306 /// and files and then generates the necessary rustdoc output for formatting.
307 fn acquire_input(input: &str,
308 externs: core::Externs,
309 matches: &getopts::Matches) -> Result<Output, String> {
310 match matches.opt_str("r").as_ref().map(|s| s.as_slice()) {
311 Some("rust") => Ok(rust_input(input, externs, matches)),
312 Some("json") => json_input(input),
313 Some(s) => Err(format!("unknown input format: {}", s)),
315 if input.ends_with(".json") {
318 Ok(rust_input(input, externs, matches))
324 /// Extracts `--extern CRATE=PATH` arguments from `matches` and
325 /// returns a `HashMap` mapping crate names to their paths or else an
327 fn parse_externs(matches: &getopts::Matches) -> Result<core::Externs, String> {
328 let mut externs = HashMap::new();
329 for arg in matches.opt_strs("extern").iter() {
330 let mut parts = arg.as_slice().splitn(1, '=');
331 let name = match parts.next() {
334 return Err("--extern value must not be empty".to_string());
337 let location = match parts.next() {
340 return Err("--extern value must be of the format `foo=bar`".to_string());
343 let locs = externs.find_or_insert(name.to_string(), Vec::new());
344 locs.push(location.to_string());
349 /// Interprets the input file as a rust source file, passing it through the
350 /// compiler all the way through the analysis passes. The rustdoc output is then
351 /// generated from the cleaned AST of the crate.
353 /// This form of input will run all of the plug/cleaning passes
354 fn rust_input(cratefile: &str, externs: core::Externs, matches: &getopts::Matches) -> Output {
355 let mut default_passes = !matches.opt_present("no-defaults");
356 let mut passes = matches.opt_strs("passes");
357 let mut plugins = matches.opt_strs("plugins");
359 // First, parse the crate and extract all relevant information.
360 let libs: Vec<Path> = matches.opt_strs("L")
362 .map(|s| Path::new(s.as_slice()))
364 let cfgs = matches.opt_strs("cfg");
365 let triple = matches.opt_str("target");
367 let cr = Path::new(cratefile);
368 info!("starting to run rustc");
369 let (mut krate, analysis) = std::task::try(proc() {
371 core::run_core(libs, cfgs, externs, &cr, triple)
372 }).map_err(|boxed_any|format!("{:?}", boxed_any)).unwrap();
373 info!("finished with rustc");
374 analysiskey.replace(Some(analysis));
376 match matches.opt_str("crate-name") {
377 Some(name) => krate.name = name,
381 // Process all of the crate attributes, extracting plugin metadata along
382 // with the passes which we are supposed to run.
383 match krate.module.as_ref().unwrap().doc_list() {
385 for inner in nested.iter() {
388 if "no_default_passes" == x.as_slice() => {
389 default_passes = false;
391 clean::NameValue(ref x, ref value)
392 if "passes" == x.as_slice() => {
393 for pass in value.as_slice().words() {
394 passes.push(pass.to_string());
397 clean::NameValue(ref x, ref value)
398 if "plugins" == x.as_slice() => {
399 for p in value.as_slice().words() {
400 plugins.push(p.to_string());
410 for name in DEFAULT_PASSES.iter().rev() {
411 passes.insert(0, name.to_string());
415 // Load all plugins/passes into a PluginManager
416 let path = matches.opt_str("plugin-path")
417 .unwrap_or("/tmp/rustdoc/plugins".to_string());
418 let mut pm = plugins::PluginManager::new(Path::new(path));
419 for pass in passes.iter() {
420 let plugin = match PASSES.iter()
421 .position(|&(p, _, _)| {
424 Some(i) => PASSES[i].val1(),
426 error!("unknown pass {}, skipping", *pass);
430 pm.add_plugin(plugin);
432 info!("loading plugins...");
433 for pname in plugins.into_iter() {
434 pm.load_plugin(pname);
438 info!("Executing passes/plugins");
439 return pm.run_plugins(krate);
442 /// This input format purely deserializes the json output file. No passes are
443 /// run over the deserialized output.
444 fn json_input(input: &str) -> Result<Output, String> {
445 let mut input = match File::open(&Path::new(input)) {
448 return Err(format!("couldn't open {}: {}", input, e))
451 match json::from_reader(&mut input) {
452 Err(s) => Err(s.to_string()),
453 Ok(json::Object(obj)) => {
455 // Make sure the schema is what we expect
456 match obj.pop(&"schema".to_string()) {
457 Some(json::String(version)) => {
458 if version.as_slice() != SCHEMA_VERSION {
460 "sorry, but I only understand version {}",
464 Some(..) => return Err("malformed json".to_string()),
465 None => return Err("expected a schema version".to_string()),
467 let krate = match obj.pop(&"crate".to_string()) {
469 let mut d = json::Decoder::new(json);
470 Decodable::decode(&mut d).unwrap()
472 None => return Err("malformed json".to_string()),
474 // FIXME: this should read from the "plugins" field, but currently
475 // Json doesn't implement decodable...
476 let plugin_output = Vec::new();
477 Ok((krate, plugin_output))
480 Err("malformed json input: expected an object at the \
486 /// Outputs the crate/plugin json as a giant json blob at the specified
488 fn json_output(krate: clean::Crate, res: Vec<plugins::PluginJson> ,
489 dst: Path) -> io::IoResult<()> {
491 // "schema": version,
492 // "crate": { parsed crate ... },
493 // "plugins": { output of plugins ... }
495 let mut json = std::collections::TreeMap::new();
496 json.insert("schema".to_string(), json::String(SCHEMA_VERSION.to_string()));
497 let plugins_json = res.into_iter()
501 Some((string, json)) => {
502 Some((string.to_string(), json))
507 // FIXME #8335: yuck, Rust -> str -> JSON round trip! No way to .encode
508 // straight to the Rust JSON representation.
509 let crate_json_str = {
510 let mut w = MemWriter::new();
512 let mut encoder = json::Encoder::new(&mut w as &mut io::Writer);
513 krate.encode(&mut encoder).unwrap();
515 String::from_utf8(w.unwrap()).unwrap()
517 let crate_json = match json::from_str(crate_json_str.as_slice()) {
519 Err(e) => fail!("Rust generated JSON is invalid: {:?}", e)
522 json.insert("crate".to_string(), crate_json);
523 json.insert("plugins".to_string(), json::Object(plugins_json));
525 let mut file = try!(File::create(&dst));
526 json::Object(json).to_writer(&mut file)