f405ce86c2
Most notably, this commit changes the `pub use crate::*;` in that file to `use crate::*;`. This requires a lot of `use` items in other crates to be adjusted, because everything defined within `rustc_span::*` was also available via `rustc_span::source_map::*`, which is bizarre. The commit also removes `SourceMap::span_to_relative_line_string`, which is unused.
174 lines
5.4 KiB
Rust
174 lines
5.4 KiB
Rust
use std::fmt::Write as _;
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use std::fs::{create_dir_all, read_to_string, File};
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use std::io::prelude::*;
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use std::path::Path;
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use rustc_span::edition::Edition;
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use rustc_span::DUMMY_SP;
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use crate::config::{Options, RenderOptions};
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use crate::doctest::{Collector, GlobalTestOptions};
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use crate::html::escape::Escape;
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use crate::html::markdown;
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use crate::html::markdown::{
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find_testable_code, ErrorCodes, HeadingOffset, IdMap, Markdown, MarkdownWithToc,
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};
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/// Separate any lines at the start of the file that begin with `# ` or `%`.
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fn extract_leading_metadata(s: &str) -> (Vec<&str>, &str) {
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let mut metadata = Vec::new();
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let mut count = 0;
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for line in s.lines() {
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if line.starts_with("# ") || line.starts_with('%') {
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// trim the whitespace after the symbol
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metadata.push(line[1..].trim_start());
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count += line.len() + 1;
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} else {
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return (metadata, &s[count..]);
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}
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}
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// if we're here, then all lines were metadata `# ` or `%` lines.
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(metadata, "")
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}
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/// Render `input` (e.g., "foo.md") into an HTML file in `output`
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/// (e.g., output = "bar" => "bar/foo.html").
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///
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/// Requires session globals to be available, for symbol interning.
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pub(crate) fn render<P: AsRef<Path>>(
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input: P,
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options: RenderOptions,
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edition: Edition,
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) -> Result<(), String> {
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if let Err(e) = create_dir_all(&options.output) {
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return Err(format!("{output}: {e}", output = options.output.display()));
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}
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let input = input.as_ref();
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let mut output = options.output;
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output.push(input.file_name().unwrap());
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output.set_extension("html");
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let mut css = String::new();
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for name in &options.markdown_css {
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write!(css, r#"<link rel="stylesheet" href="{name}">"#)
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.expect("Writing to a String can't fail");
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}
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let input_str =
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read_to_string(input).map_err(|err| format!("{input}: {err}", input = input.display()))?;
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let playground_url = options.markdown_playground_url.or(options.playground_url);
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let playground = playground_url.map(|url| markdown::Playground { crate_name: None, url });
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let mut out =
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File::create(&output).map_err(|e| format!("{output}: {e}", output = output.display()))?;
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let (metadata, text) = extract_leading_metadata(&input_str);
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if metadata.is_empty() {
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return Err("invalid markdown file: no initial lines starting with `# ` or `%`".to_owned());
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}
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let title = metadata[0];
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let mut ids = IdMap::new();
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let error_codes = ErrorCodes::from(options.unstable_features.is_nightly_build());
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let text = if !options.markdown_no_toc {
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MarkdownWithToc {
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content: text,
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ids: &mut ids,
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error_codes,
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edition,
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playground: &playground,
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// For markdown files, it'll be disabled until the feature is enabled by default.
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custom_code_classes_in_docs: false,
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}
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.into_string()
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} else {
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Markdown {
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content: text,
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links: &[],
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ids: &mut ids,
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error_codes,
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edition,
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playground: &playground,
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heading_offset: HeadingOffset::H1,
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// For markdown files, it'll be disabled until the feature is enabled by default.
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custom_code_classes_in_docs: false,
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}
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.into_string()
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};
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let err = write!(
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&mut out,
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r#"<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="generator" content="rustdoc">
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<title>{title}</title>
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{css}
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{in_header}
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</head>
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<body class="rustdoc">
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<!--[if lte IE 8]>
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<div class="warning">
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This old browser is unsupported and will most likely display funky
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things.
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</div>
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<![endif]-->
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{before_content}
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<h1 class="title">{title}</h1>
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{text}
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{after_content}
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</body>
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</html>"#,
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title = Escape(title),
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css = css,
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in_header = options.external_html.in_header,
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before_content = options.external_html.before_content,
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text = text,
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after_content = options.external_html.after_content,
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);
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match err {
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Err(e) => Err(format!("cannot write to `{output}`: {e}", output = output.display())),
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Ok(_) => Ok(()),
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}
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}
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/// Runs any tests/code examples in the markdown file `input`.
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pub(crate) fn test(options: Options) -> Result<(), String> {
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let input_str = read_to_string(&options.input)
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.map_err(|err| format!("{input}: {err}", input = options.input.display()))?;
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let mut opts = GlobalTestOptions::default();
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opts.no_crate_inject = true;
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let mut collector = Collector::new(
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options.input.display().to_string(),
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options.clone(),
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true,
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opts,
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None,
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Some(options.input),
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options.enable_per_target_ignores,
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);
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collector.set_position(DUMMY_SP);
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let codes = ErrorCodes::from(options.unstable_features.is_nightly_build());
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// For markdown files, custom code classes will be disabled until the feature is enabled by default.
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find_testable_code(
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&input_str,
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&mut collector,
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codes,
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options.enable_per_target_ignores,
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None,
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false,
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);
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crate::doctest::run_tests(options.test_args, options.nocapture, collector.tests);
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Ok(())
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}
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