1 #![feature(rustc_private)]
3 extern crate env_logger;
5 extern crate serialize as rustc_serialize;
7 use std::collections::BTreeMap;
10 use std::fs::{self, read_dir, File};
13 use std::path::PathBuf;
14 use std::cell::RefCell;
16 use syntax::edition::DEFAULT_EDITION;
17 use syntax::diagnostics::metadata::{get_metadata_dir, ErrorMetadataMap, ErrorMetadata};
19 use rustdoc::html::markdown::{Markdown, IdMap, ErrorCodes, Playground};
20 use rustc_serialize::json;
24 Markdown(MarkdownFormatter),
29 fn from(format: &str, resource_suffix: &str) -> OutputFormat {
30 match &*format.to_lowercase() {
31 "html" => OutputFormat::HTML(HTMLFormatter(RefCell::new(IdMap::new()),
32 resource_suffix.to_owned())),
33 "markdown" => OutputFormat::Markdown(MarkdownFormatter),
34 s => OutputFormat::Unknown(s.to_owned()),
40 fn header(&self, output: &mut dyn Write) -> Result<(), Box<dyn Error>>;
41 fn title(&self, output: &mut dyn Write) -> Result<(), Box<dyn Error>>;
42 fn error_code_block(&self, output: &mut dyn Write, info: &ErrorMetadata,
43 err_code: &str) -> Result<(), Box<dyn Error>>;
44 fn footer(&self, output: &mut dyn Write) -> Result<(), Box<dyn Error>>;
47 struct HTMLFormatter(RefCell<IdMap>, String);
48 struct MarkdownFormatter;
50 impl Formatter for HTMLFormatter {
51 fn header(&self, output: &mut dyn Write) -> Result<(), Box<dyn Error>> {
52 write!(output, r##"<!DOCTYPE html>
55 <title>Rust Compiler Error Index</title>
56 <meta charset="utf-8">
57 <!-- Include rust.css after light.css so its rules take priority. -->
58 <link rel="stylesheet" type="text/css" href="light{suffix}.css"/>
59 <link rel="stylesheet" type="text/css" href="rust.css"/>
71 fn title(&self, output: &mut dyn Write) -> Result<(), Box<dyn Error>> {
72 write!(output, "<h1>Rust Compiler Error Index</h1>\n")?;
76 fn error_code_block(&self, output: &mut dyn Write, info: &ErrorMetadata,
77 err_code: &str) -> Result<(), Box<dyn Error>> {
78 // Enclose each error in a div so they can be shown/hidden en masse.
79 let desc_desc = match info.description {
80 Some(_) => "error-described",
81 None => "error-undescribed",
83 let use_desc = match info.use_site {
84 Some(_) => "error-used",
85 None => "error-unused",
87 write!(output, "<div class=\"{} {}\">", desc_desc, use_desc)?;
89 // Error title (with self-link).
91 "<h2 id=\"{0}\" class=\"section-header\"><a href=\"#{0}\">{0}</a></h2>\n",
94 // Description rendered as markdown.
95 match info.description {
97 let mut id_map = self.0.borrow_mut();
98 let playground = Playground {
100 url: String::from("https://play.rust-lang.org/"),
103 Markdown(desc, &[], &mut id_map,
104 ErrorCodes::Yes, DEFAULT_EDITION, &Some(playground)).to_string())?
106 None => write!(output, "<p>No description.</p>\n")?,
109 write!(output, "</div>\n")?;
113 fn footer(&self, output: &mut dyn Write) -> Result<(), Box<dyn Error>> {
114 write!(output, r##"<script>
115 function onEach(arr, func) {{
116 if (arr && arr.length > 0 && func) {{
117 for (var i = 0; i < arr.length; i++) {{
123 function hasClass(elem, className) {{
124 if (elem && className && elem.className) {{
125 var elemClass = elem.className;
126 var start = elemClass.indexOf(className);
129 }} else if (elemClass.length === className.length) {{
132 if (start > 0 && elemClass[start - 1] !== ' ') {{
135 var end = start + className.length;
136 if (end < elemClass.length && elemClass[end] !== ' ') {{
141 if (start > 0 && elemClass[start - 1] !== ' ') {{
144 var end = start + className.length;
145 if (end < elemClass.length && elemClass[end] !== ' ') {{
153 onEach(document.getElementsByClassName('rust-example-rendered'), function(e) {{
154 if (hasClass(e, 'compile_fail')) {{
155 e.addEventListener("mouseover", function(event) {{
156 e.previousElementSibling.childNodes[0].style.color = '#f00';
158 e.addEventListener("mouseout", function(event) {{
159 e.previousElementSibling.childNodes[0].style.color = '';
161 }} else if (hasClass(e, 'ignore')) {{
162 e.addEventListener("mouseover", function(event) {{
163 e.previousElementSibling.childNodes[0].style.color = '#ff9200';
165 e.addEventListener("mouseout", function(event) {{
166 e.previousElementSibling.childNodes[0].style.color = '';
177 impl Formatter for MarkdownFormatter {
178 #[allow(unused_variables)]
179 fn header(&self, output: &mut dyn Write) -> Result<(), Box<dyn Error>> {
183 fn title(&self, output: &mut dyn Write) -> Result<(), Box<dyn Error>> {
184 write!(output, "# Rust Compiler Error Index\n")?;
188 fn error_code_block(&self, output: &mut dyn Write, info: &ErrorMetadata,
189 err_code: &str) -> Result<(), Box<dyn Error>> {
190 Ok(match info.description {
191 Some(ref desc) => write!(output, "## {}\n{}\n", err_code, desc)?,
196 #[allow(unused_variables)]
197 fn footer(&self, output: &mut dyn Write) -> Result<(), Box<dyn Error>> {
202 /// Loads all the metadata files from `metadata_dir` into an in-memory map.
203 fn load_all_errors(metadata_dir: &Path) -> Result<ErrorMetadataMap, Box<dyn Error>> {
204 let mut all_errors = BTreeMap::new();
206 for entry in read_dir(metadata_dir)? {
207 let path = entry?.path();
209 let metadata_str = fs::read_to_string(&path)?;
211 let some_errors: ErrorMetadataMap = json::decode(&metadata_str)?;
213 for (err_code, info) in some_errors {
214 all_errors.insert(err_code, info);
221 /// Output an HTML page for the errors in `err_map` to `output_path`.
222 fn render_error_page<T: Formatter>(err_map: &ErrorMetadataMap, output_path: &Path,
223 formatter: T) -> Result<(), Box<dyn Error>> {
224 let mut output_file = File::create(output_path)?;
226 formatter.header(&mut output_file)?;
227 formatter.title(&mut output_file)?;
229 for (err_code, info) in err_map {
230 formatter.error_code_block(&mut output_file, info, err_code)?;
233 formatter.footer(&mut output_file)
236 fn main_with_result(format: OutputFormat, dst: &Path) -> Result<(), Box<dyn Error>> {
237 let build_arch = env::var("CFG_BUILD")?;
238 let metadata_dir = get_metadata_dir(&build_arch);
239 let err_map = load_all_errors(&metadata_dir)?;
241 OutputFormat::Unknown(s) => panic!("Unknown output format: {}", s),
242 OutputFormat::HTML(h) => render_error_page(&err_map, dst, h)?,
243 OutputFormat::Markdown(m) => render_error_page(&err_map, dst, m)?,
248 fn parse_args() -> (OutputFormat, PathBuf) {
249 let mut args = env::args().skip(1);
250 let format = args.next();
251 let dst = args.next();
252 let resource_suffix = args.next().unwrap_or_else(String::new);
253 let format = format.map(|a| OutputFormat::from(&a, &resource_suffix))
254 .unwrap_or(OutputFormat::from("html", &resource_suffix));
255 let dst = dst.map(PathBuf::from).unwrap_or_else(|| {
257 OutputFormat::HTML(..) => PathBuf::from("doc/error-index.html"),
258 OutputFormat::Markdown(..) => PathBuf::from("doc/error-index.md"),
259 OutputFormat::Unknown(..) => PathBuf::from("<nul>"),
267 let (format, dst) = parse_args();
268 let result = syntax::with_default_globals(move || {
269 main_with_result(format, &dst)
271 if let Err(e) = result {
272 panic!("{}", e.description());