vendor/mdbook/src/renderer/markdown_renderer.rs

   1 use crate::book::BookItem;
   2 use crate::errors::*;
   3 use crate::renderer::{RenderContext, Renderer};
   4 use crate::utils;
   5
   6 use std::fs;
   7
   8 #[derive(Default)]
   9 /// A renderer to output the Markdown after the preprocessors have run. Mostly useful
  10 /// when debugging preprocessors.
  11 pub struct MarkdownRenderer;
  12
  13 impl MarkdownRenderer {
  14     /// Create a new `MarkdownRenderer` instance.
  15     pub fn new() -> Self {
  16         MarkdownRenderer
  17     }
  18 }
  19
  20 impl Renderer for MarkdownRenderer {
  21     fn name(&self) -> &str {
  22         "markdown"
  23     }
  24
  25     fn render(&self, ctx: &RenderContext) -> Result<()> {
  26         let destination = &ctx.destination;
  27         let book = &ctx.book;
  28
  29         if destination.exists() {
  30             utils::fs::remove_dir_content(destination)
  31                 .with_context(|| "Unable to remove stale Markdown output")?;
  32         }
  33
  34         trace!("markdown render");
  35         for item in book.iter() {
  36             if let BookItem::Chapter(ref ch) = *item {
  37                 if !ch.is_draft_chapter() {
  38                     utils::fs::write_file(
  39                         &ctx.destination,
  40                         &ch.path.as_ref().expect("Checked path exists before"),
  41                         ch.content.as_bytes(),
  42                     )?;
  43                 }
  44             }
  45         }
  46
  47         fs::create_dir_all(&destination)
  48             .with_context(|| "Unexpected error when constructing destination path")?;
  49
  50         Ok(())
  51     }
  52 }