src/tools/rustdoc-themes/main.rs

   1 use std::env::args;
   2 use std::fs::{create_dir_all, File};
   3 use std::io::{BufRead, BufReader, BufWriter, Write};
   4 use std::path::Path;
   5 use std::process::{exit, Command};
   6
   7 fn get_themes<P: AsRef<Path>>(style_path: P) -> Vec<String> {
   8     let mut ret = Vec::with_capacity(10);
   9
  10     const BEGIN_THEME_MARKER: &'static str = "/* Begin theme: ";
  11     const END_THEME_MARKER: &'static str = "/* End theme: ";
  12
  13     let timestamp =
  14         std::time::SystemTime::UNIX_EPOCH.elapsed().expect("time is after UNIX epoch").as_millis();
  15
  16     let mut in_theme = None;
  17     create_dir_all("build/tmp").expect("failed to create temporary test directory");
  18     for line in BufReader::new(File::open(style_path).expect("read rustdoc.css failed")).lines() {
  19         let line = line.expect("read line from rustdoc.css failed");
  20         let line = line.trim();
  21         if line.starts_with(BEGIN_THEME_MARKER) {
  22             let theme_name = &line[BEGIN_THEME_MARKER.len()..].trim().trim_end_matches("*/").trim();
  23             let filename = format!("build/tmp/rustdoc.bootstrap.{timestamp}.{theme_name}.css");
  24             in_theme = Some(BufWriter::new(
  25                 File::create(&filename).expect("failed to create temporary test css file"),
  26             ));
  27             ret.push(filename);
  28         }
  29         if let Some(in_theme) = in_theme.as_mut() {
  30             in_theme.write_all(line.as_bytes()).expect("write to temporary test css file");
  31             in_theme.write_all(b"\n").expect("write to temporary test css file");
  32         }
  33         if line.starts_with(END_THEME_MARKER) {
  34             in_theme = None;
  35         }
  36     }
  37     ret
  38 }
  39
  40 fn main() {
  41     let argv: Vec<String> = args().collect();
  42
  43     if argv.len() < 3 {
  44         eprintln!("Needs rustdoc binary path");
  45         exit(1);
  46     }
  47     let rustdoc_bin = &argv[1];
  48     let style_path = &argv[2];
  49     let themes = get_themes(&style_path);
  50     if themes.is_empty() {
  51         eprintln!("No themes found in \"{}\"...", style_path);
  52         exit(1);
  53     }
  54     let arg_name = "--check-theme".to_owned();
  55     let status = Command::new(rustdoc_bin)
  56         .args(&themes.iter().flat_map(|t| vec![&arg_name, t].into_iter()).collect::<Vec<_>>())
  57         .status()
  58         .expect("failed to execute child");
  59     if !status.success() {
  60         exit(1);
  61     }
  62 }