1 use std::fs::{create_dir_all, read_to_string, File};
2 use std::io::prelude::*;
5 use rustc_span::edition::Edition;
6 use rustc_span::source_map::DUMMY_SP;
8 use crate::config::{Options, RenderOptions};
9 use crate::doctest::{Collector, TestOptions};
10 use crate::html::escape::Escape;
11 use crate::html::markdown;
12 use crate::html::markdown::{find_testable_code, ErrorCodes, IdMap, Markdown, MarkdownWithToc};
14 /// Separate any lines at the start of the file that begin with `# ` or `%`.
15 fn extract_leading_metadata(s: &str) -> (Vec<&str>, &str) {
16 let mut metadata = Vec::new();
19 for line in s.lines() {
20 if line.starts_with("# ") || line.starts_with('%') {
21 // trim the whitespace after the symbol
22 metadata.push(line[1..].trim_start());
23 count += line.len() + 1;
25 return (metadata, &s[count..]);
29 // if we're here, then all lines were metadata `# ` or `%` lines.
33 /// Render `input` (e.g., "foo.md") into an HTML file in `output`
34 /// (e.g., output = "bar" => "bar/foo.html").
35 crate fn render<P: AsRef<Path>>(
37 options: RenderOptions,
39 ) -> Result<(), String> {
40 if let Err(e) = create_dir_all(&options.output) {
41 return Err(format!("{}: {}", options.output.display(), e));
44 let input = input.as_ref();
45 let mut output = options.output;
46 output.push(input.file_name().unwrap());
47 output.set_extension("html");
49 let mut css = String::new();
50 for name in &options.markdown_css {
51 let s = format!("<link rel=\"stylesheet\" type=\"text/css\" href=\"{}\">\n", name);
55 let input_str = read_to_string(input).map_err(|err| format!("{}: {}", input.display(), err))?;
56 let playground_url = options.markdown_playground_url.or(options.playground_url);
57 let playground = playground_url.map(|url| markdown::Playground { crate_name: None, url });
59 let mut out = File::create(&output).map_err(|e| format!("{}: {}", output.display(), e))?;
61 let (metadata, text) = extract_leading_metadata(&input_str);
62 if metadata.is_empty() {
63 return Err("invalid markdown file: no initial lines starting with `# ` or `%`".to_owned());
65 let title = metadata[0];
67 let mut ids = IdMap::new();
68 let error_codes = ErrorCodes::from(options.unstable_features.is_nightly_build());
69 let text = if !options.markdown_no_toc {
70 MarkdownWithToc(text, &mut ids, error_codes, edition, &playground).into_string()
72 Markdown(text, &[], &mut ids, error_codes, edition, &playground).into_string()
80 <meta charset="utf-8">
81 <meta name="viewport" content="width=device-width, initial-scale=1.0">
82 <meta name="generator" content="rustdoc">
83 <title>{title}</title>
88 <body class="rustdoc">
91 This old browser is unsupported and will most likely display funky
97 <h1 class="title">{title}</h1>
102 title = Escape(title),
104 in_header = options.external_html.in_header,
105 before_content = options.external_html.before_content,
107 after_content = options.external_html.after_content,
111 Err(e) => Err(format!("cannot write to `{}`: {}", output.display(), e)),
116 /// Runs any tests/code examples in the markdown file `input`.
117 crate fn test(mut options: Options) -> Result<(), String> {
118 let input_str = read_to_string(&options.input)
119 .map_err(|err| format!("{}: {}", options.input.display(), err))?;
120 let mut opts = TestOptions::default();
121 opts.no_crate_inject = true;
122 opts.display_warnings = options.display_warnings;
123 let mut collector = Collector::new(
124 options.input.display().to_string(),
130 options.enable_per_target_ignores,
132 collector.set_position(DUMMY_SP);
133 let codes = ErrorCodes::from(options.render_options.unstable_features.is_nightly_build());
135 find_testable_code(&input_str, &mut collector, codes, options.enable_per_target_ignores, None);
137 options.test_args.insert(0, "rustdoctest".to_string());
141 Some(testing::Options::new().display_output(options.display_warnings)),