use std::fs::File;
use std::io::prelude::*;
use std::path::PathBuf;
use errors;
use testing;
use syntax::edition::Edition;
use syntax::source_map::DUMMY_SP;
use rustc_feature::UnstableFeatures;
use crate::externalfiles::{LoadStringError, load_string};
use crate::config::{Options, RenderOptions};
use crate::html::escape::Escape;
use crate::html::markdown;
use crate::html::markdown::{ErrorCodes, IdMap, Markdown, MarkdownWithToc, find_testable_code};
use crate::test::{TestOptions, Collector};
/// Separate any lines at the start of the file that begin with `# ` or `%`.
fn extract_leading_metadata(s: &str) -> (Vec<&str>, &str) {
let mut metadata = Vec::new();
let mut count = 0;
for line in s.lines() {
if line.starts_with("# ") || line.starts_with("%") {
// trim the whitespace after the symbol
metadata.push(line[1..].trim_start());
count += line.len() + 1;
} else {
return (metadata, &s[count..]);
}
}
// if we're here, then all lines were metadata `# ` or `%` lines.
(metadata, "")
}
/// Render `input` (e.g., "foo.md") into an HTML file in `output`
/// (e.g., output = "bar" => "bar/foo.html").
pub fn render(
input: PathBuf,
options: RenderOptions,
diag: &errors::Handler,
edition: Edition
) -> i32 {
let mut output = options.output;
output.push(input.file_name().unwrap());
output.set_extension("html");
let mut css = String::new();
for name in &options.markdown_css {
let s = format!("\n", name);
css.push_str(&s)
}
let input_str = match load_string(&input, diag) {
Ok(s) => s,
Err(LoadStringError::ReadFail) => return 1,
Err(LoadStringError::BadUtf8) => return 2,
};
let playground_url = options.markdown_playground_url
.or(options.playground_url);
let playground = playground_url.map(|url| markdown::Playground {
crate_name: None,
url,
});
let mut out = match File::create(&output) {
Err(e) => {
diag.struct_err(&format!("{}: {}", output.display(), e)).emit();
return 4;
}
Ok(f) => f,
};
let (metadata, text) = extract_leading_metadata(&input_str);
if metadata.is_empty() {
diag.struct_err("invalid markdown file: no initial lines starting with `# ` or `%`").emit();
return 5;
}
let title = metadata[0];
let mut ids = IdMap::new();
let error_codes = ErrorCodes::from(UnstableFeatures::from_environment().is_nightly_build());
let text = if !options.markdown_no_toc {
MarkdownWithToc(text, &mut ids, error_codes, edition, &playground).to_string()
} else {
Markdown(text, &[], &mut ids, error_codes, edition, &playground).to_string()
};
let err = write!(
&mut out,
r#"
{title}
{css}
{in_header}
{before_content}
{title}
{text}
{after_content}
"#,
title = Escape(title),
css = css,
in_header = options.external_html.in_header,
before_content = options.external_html.before_content,
text = text,
after_content = options.external_html.after_content,
);
match err {
Err(e) => {
diag.struct_err(&format!("cannot write to `{}`: {}", output.display(), e)).emit();
6
}
Ok(_) => 0,
}
}
/// Runs any tests/code examples in the markdown file `input`.
pub fn test(mut options: Options, diag: &errors::Handler) -> i32 {
let input_str = match load_string(&options.input, diag) {
Ok(s) => s,
Err(LoadStringError::ReadFail) => return 1,
Err(LoadStringError::BadUtf8) => return 2,
};
let mut opts = TestOptions::default();
opts.no_crate_inject = true;
opts.display_warnings = options.display_warnings;
let mut collector = Collector::new(options.input.display().to_string(), options.clone(),
true, opts, None, Some(options.input),
options.enable_per_target_ignores);
collector.set_position(DUMMY_SP);
let codes = ErrorCodes::from(UnstableFeatures::from_environment().is_nightly_build());
find_testable_code(&input_str, &mut collector, codes, options.enable_per_target_ignores);
options.test_args.insert(0, "rustdoctest".to_string());
testing::test_main(&options.test_args, collector.tests,
Some(testing::Options::new().display_output(options.display_warnings)));
0
}