52 lines
1.3 KiB
Rust
52 lines
1.3 KiB
Rust
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use {
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pulldown_cmark::{
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Event,
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HeadingLevel::{H2, H3},
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Options, Parser, Tag,
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},
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pulldown_cmark_to_cmark::cmark,
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std::{error::Error, fs},
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};
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fn main() -> Result<(), Box<dyn Error>> {
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fs::remove_dir_all("book/src").ok();
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fs::create_dir("book/src")?;
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let txt = fs::read_to_string("README.md")?;
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let mut chapters = vec![(1usize, Vec::new())];
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for event in Parser::new_ext(&txt, Options::all()) {
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if let Event::Start(Tag::Heading(level @ (H2 | H3), ..)) = event {
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chapters.push((if level == H2 { 2 } else { 3 }, Vec::new()));
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}
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chapters.last_mut().unwrap().1.push(event);
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}
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let mut summary = String::new();
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for (i, (level, chapter)) in chapters.into_iter().enumerate() {
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let mut txt = String::new();
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cmark(chapter.iter(), &mut txt)?;
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let title = if i == 0 {
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txt = txt.split_inclusive('\n').skip(1).collect::<String>();
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"Introduction"
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} else {
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txt.lines().next().unwrap().split_once(' ').unwrap().1
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};
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let path = format!("book/src/chapter_{}.md", i + 1);
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fs::write(&path, &txt)?;
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summary.push_str(&format!(
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"{}- [{}](chapter_{}.md)\n",
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" ".repeat((level.saturating_sub(1)) * 4),
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title,
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i + 1
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));
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}
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fs::write("book/src/SUMMARY.md", summary)?;
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Ok(())
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}
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