Fix book links (#1227)

.github/workflows/ci.yaml

@@ -80,6 +80,16 @@ jobs:
       with:
         mdbook-version: latest
 
+    - name: Install `mdbook-linkcheck`
+      if: ${{ matrix.os == 'ubuntu-latest' }}
+      run: |
+        mkdir -p mdbook-linkcheck
+        cd mdbook-linkcheck
+        wget https://github.com/Michael-F-Bryan/mdbook-linkcheck/releases/latest/download/mdbook-linkcheck.x86_64-unknown-linux-gnu.zip
+        unzip mdbook-linkcheck.x86_64-unknown-linux-gnu.zip
+        chmod +x mdbook-linkcheck
+        pwd >> $GITHUB_PATH
+
     - name: Build book
       if: ${{ matrix.os == 'ubuntu-latest' }}
       run: |

.gitignore

@@ -1,6 +1,8 @@
 /.vagrant
 /README.html
+/book/en/build
 /book/en/src
+/book/zh/build
 /book/zh/src
 /fuzz/artifacts
 /fuzz/corpus
@@ -9,4 +11,3 @@
 /test-utilities/Cargo.lock
 /test-utilities/target
 /tmp
-/www/man

README.md

@@ -313,7 +313,7 @@ Kakoune supports `justfile` syntax highlighting out of the box, thanks to TeddyD
 
 ### Sublime Text
 
-A syntax file for Sublime Text written by TonioGela is available in [extras/just.sublime-syntax](extras/just.sublime-syntax).
+A syntax file for Sublime Text written by TonioGela is available in [extras/just.sublime-syntax](https://github.com/casey/just/blob/master/extras/just.sublime-syntax).
 
 ### Other Editors
 
@@ -940,7 +940,7 @@ $ just system-info
 This is an x86_64 machine
 ```
 
-The `os_family()` function can be used to create cross-platform `justfile`s that work on various operating systems. For an example, see [cross-platform.just](examples/cross-platform.just) file.
+The `os_family()` function can be used to create cross-platform `justfile`s that work on various operating systems. For an example, see [cross-platform.just](https://github.com/casey/just/blob/master/examples/cross-platform.just) file.
 
 #### Environment Variables
 
@@ -1946,7 +1946,7 @@ complete -F _just -o bashdefault -o default j
 
 ### Shell Completion Scripts
 
-Shell completion scripts for Bash, Zsh, Fish, PowerShell, and Elvish are available in the [completions](completions) directory. Please refer to your shell's documentation for how to install them.
+Shell completion scripts for Bash, Zsh, Fish, PowerShell, and Elvish are available in the [completions](https://github.com/casey/just/tree/master/completions) directory. Please refer to your shell's documentation for how to install them.
 
 The `just` binary can also generate the same completion scripts at runtime, using the `--completions` command:
 
@@ -1956,11 +1956,11 @@ $ just --completions zsh > just.zsh
 
 ### Grammar
 
-A non-normative grammar of `justfile`s can be found in [GRAMMAR.md](GRAMMAR.md).
+A non-normative grammar of `justfile`s can be found in [GRAMMAR.md](https://github.com/casey/just/blob/master/GRAMMAR.md).
 
 ### just.sh
 
-Before `just` was a fancy Rust program it was a tiny shell script that called `make`. You can find the old version in [extras/just.sh](extras/just.sh).
+Before `just` was a fancy Rust program it was a tiny shell script that called `make`. You can find the old version in [extras/just.sh](https://github.com/casey/just/blob/master/extras/just.sh).
 
 ### User `justfile`s
 
@@ -2099,7 +2099,7 @@ Some ideas for recipes:
 
 Even for small, personal projects it's nice to be able to remember commands by name instead of ^Reverse searching your shell history, and it's a huge boon to be able to go into an old project written in a random language with a mysterious build system and know that all the commands you need to do whatever you need to do are in the `justfile`, and that if you type `just` something useful (or at least interesting!) will probably happen.
 
-For ideas for recipes, check out [this project's `justfile`](justfile), or some of the `justfile`s [out in the wild](https://github.com/search?o=desc&q=filename%3Ajustfile&s=indexed&type=Code).
+For ideas for recipes, check out [this project's `justfile`](https://github.com/casey/just/blob/master/justfile), or some of the `justfile`s [out in the wild](https://github.com/search?o=desc&q=filename%3Ajustfile&s=indexed&type=Code).
 
 Anyways, I think that's about it for this incredibly long-winded README.
 

README.中文.md

@@ -309,7 +309,7 @@ Kakoune 已经内置支持 `justfile` 语法高亮，这要感谢 TeddyDD。
 
 ### Sublime Text
 
-由 TonioGela 编写的 Sublime Text 的语法高亮文件在 [extras/just.sublim-syntax](extras/just.sublim-syntax) 中提供。
+由 TonioGela 编写的 Sublime Text 的语法高亮文件在 [extras/just.sublim-syntax](https://github.com/casey/just/blob/master/extras/just.sublime-syntax) 中提供。
 
 ### 其它编辑器
 
@@ -936,7 +936,7 @@ $ just system-info
 This is an x86_64 machine
 ```
 
-`os_family()` 函数可以用来创建跨平台的 `justfile`，使其可以在不同的操作系统上工作。一个例子，见 [cross-platform.just](examples/cross-platform.just) 文件。
+`os_family()` 函数可以用来创建跨平台的 `justfile`，使其可以在不同的操作系统上工作。一个例子，见 [cross-platform.just](https://github.com/casey/just/blob/master/examples/cross-platform.just) 文件。
 
 #### 环境变量
 
@@ -1941,7 +1941,7 @@ complete -F _just -o bashdefault -o default j
 
 ### Shell 自动补全脚本
 
-Bash、Zsh、Fish、PowerShell 和 Elvish 的 Shell 自动补全脚本可以在 [自动补全](completions) 目录下找到。关于如何安装它们，请参考你的 Shell 文档。
+Bash、Zsh、Fish、PowerShell 和 Elvish 的 Shell 自动补全脚本可以在 [自动补全](https://github.com/casey/just/tree/master/completions) 目录下找到。关于如何安装它们，请参考你的 Shell 文档。
 
 `just` 二进制文件也可以在运行时生成相同的自动补全脚本，使用 `--completions` 命令即可，如下：
 
@@ -1951,11 +1951,11 @@ $ just --completions zsh > just.zsh
 
 ### 语法
 
-在 [GRAMMAR.md](GRAMMAR.md) 中可以找到一个非正式的 `justfile` 语法说明。
+在 [GRAMMAR.md](https://github.com/casey/just/blob/master/GRAMMAR.md) 中可以找到一个非正式的 `justfile` 语法说明。
 
 ### just.sh
 
-在 `just` 成为一个精致的 Rust 程序之前，它是一个很小的 Shell 脚本，叫 `make`。你可以在 [extras/just.sh](extras/just.sh) 中找到旧版本。
+在 `just` 成为一个精致的 Rust 程序之前，它是一个很小的 Shell 脚本，叫 `make`。你可以在 [extras/just.sh](https://github.com/casey/just/blob/master/extras/just.sh) 中找到旧版本。
 
 ### 用户 `justfile`
 
@@ -2094,7 +2094,7 @@ make: `test' is up to date.
 
 即使是小型的个人项目，能够通过名字记住命令，而不是通过 ^Reverse 搜索你的 Shell 历史，这也是一个巨大的福音，能够进入一个用任意语言编写的旧项目，并知道你需要用到的所有命令都在 `justfile` 中，如果你输入 `just`，就可能会输出一些有用的（或至少是有趣的！）信息。
 
-关于配方的想法，请查看 [这个项目的 `justfile`](justfile)，或一些 [在其他项目里](https://github.com/search?o=desc&q=filename%3Ajustfile&s=indexed&type=Code) 的 `justfile`。
+关于配方的想法，请查看 [这个项目的 `justfile`](https://github.com/casey/just/blob/master/justfile)，或一些 [在其他项目里](https://github.com/search?o=desc&q=filename%3Ajustfile&s=indexed&type=Code) 的 `justfile`。
 
 总之，我想这个令人难以置信地啰嗦的 README 就到此为止了。
 

bin/generate-book/src/main.rs

@@ -1,13 +1,12 @@
 use {
-  pulldown_cmark::{
-    Event,
-    HeadingLevel::{H2, H3},
-    Options, Parser, Tag,
-  },
+  pulldown_cmark::{CowStr, Event, HeadingLevel, Options, Parser, Tag},
   pulldown_cmark_to_cmark::cmark,
-  std::{error::Error, fs},
+  std::{collections::BTreeMap, error::Error, fs, ops::Deref},
 };
 
+type Result<T = ()> = std::result::Result<T, Box<dyn Error>>;
+
+#[derive(Copy, Clone, Debug)]
 enum Language {
   English,
   Chinese,
@@ -36,7 +35,61 @@ impl Language {
   }
 }
 
-fn main() -> Result<(), Box<dyn Error>> {
+#[derive(Debug)]
+struct Chapter<'a> {
+  level: HeadingLevel,
+  events: Vec<Event<'a>>,
+  index: usize,
+  language: Language,
+}
+
+impl<'a> Chapter<'a> {
+  fn title(&self) -> String {
+    if self.index == 0 {
+      return self.language.introduction().into();
+    }
+
+    self
+      .events
+      .iter()
+      .skip_while(|event| !matches!(event, Event::Start(Tag::Heading(..))))
+      .skip(1)
+      .take_while(|event| !matches!(event, Event::End(Tag::Heading(..))))
+      .filter_map(|event| match event {
+        Event::Code(content) | Event::Text(content) => Some(content.deref()),
+        _ => None,
+      })
+      .collect()
+  }
+
+  fn number(&self) -> usize {
+    self.index + 1
+  }
+
+  fn markdown(&self) -> Result<String> {
+    let mut markdown = String::new();
+    cmark(self.events.iter(), &mut markdown)?;
+    if self.index == 0 {
+      markdown = markdown.split_inclusive('\n').skip(1).collect::<String>();
+    }
+    Ok(markdown)
+  }
+}
+
+fn slug(s: &str) -> String {
+  let mut slug = String::new();
+  for c in s.chars() {
+    match c {
+      'A'..='Z' => slug.extend(c.to_lowercase()),
+      ' ' => slug.push('-'),
+      '?' | '.' | '？' => {}
+      _ => slug.push(c),
+    }
+  }
+  slug
+}
+
+fn main() -> Result {
   for language in [Language::English, Language::Chinese] {
     let src = format!("book/{}/src", language.code());
     fs::remove_dir_all(&src).ok();
@@ -44,34 +97,88 @@ fn main() -> Result<(), Box<dyn Error>> {
 
     let txt = fs::read_to_string(format!("README{}.md", language.suffix()))?;
 
-    let mut chapters = vec![(1usize, Vec::new())];
+    let mut chapters = vec![Chapter {
+      level: HeadingLevel::H1,
+      events: Vec::new(),
+      index: 0,
+      language,
+    }];
 
     for event in Parser::new_ext(&txt, Options::all()) {
-      if let Event::Start(Tag::Heading(level @ (H2 | H3), ..)) = event {
-        chapters.push((if level == H2 { 2 } else { 3 }, Vec::new()));
+      if let Event::Start(Tag::Heading(level @ (HeadingLevel::H2 | HeadingLevel::H3), ..)) = event {
+        let index = chapters.last().unwrap().index + 1;
+        chapters.push(Chapter {
+          level,
+          events: Vec::new(),
+          index,
+          language,
+        });
+      }
+      chapters.last_mut().unwrap().events.push(event);
+    }
+
+    let mut links = BTreeMap::new();
+
+    for chapter in &chapters {
+      let mut current = None;
+      for event in &chapter.events {
+        match event {
+          Event::Start(Tag::Heading(..)) => current = Some(Vec::new()),
+          Event::End(Tag::Heading(level, ..)) => {
+            let events = current.unwrap();
+            let title = events
+              .iter()
+              .filter_map(|event| match event {
+                Event::Code(content) | Event::Text(content) => Some(content.deref()),
+                _ => None,
+              })
+              .collect::<String>();
+            let slug = slug(&title);
+            let link = if let HeadingLevel::H1 | HeadingLevel::H2 | HeadingLevel::H3 = level {
+              format!("chapter_{}.html", chapter.number())
+            } else {
+              format!("chapter_{}.html#{}", chapter.number(), slug)
+            };
+            links.insert(slug, link);
+            current = None;
+          }
+          _ => {
+            if let Some(events) = &mut current {
+              events.push(event.clone());
+            }
+          }
+        }
+      }
+    }
+
+    for chapter in &mut chapters {
+      for event in &mut chapter.events {
+        if let Event::Start(Tag::Link(_, dest, _)) | Event::End(Tag::Link(_, dest, _)) = event {
+          if let Some(anchor) = dest.clone().strip_prefix('#') {
+            *dest = CowStr::Borrowed(&links[anchor]);
+          }
+        }
       }
-      chapters.last_mut().unwrap().1.push(event);
     }
 
     let mut summary = String::new();
 
-    for (i, (level, chapter)) in chapters.into_iter().enumerate() {
-      let mut txt = String::new();
-      cmark(chapter.iter(), &mut txt)?;
-      let title = if i == 0 {
-        txt = txt.split_inclusive('\n').skip(1).collect::<String>();
-        language.introduction()
-      } else {
-        txt.lines().next().unwrap().split_once(' ').unwrap().1
+    for chapter in chapters {
+      let path = format!("{}/chapter_{}.md", src, chapter.number());
+      fs::write(&path, &chapter.markdown()?)?;
+      let indent = match chapter.level {
+        HeadingLevel::H1 => 0,
+        HeadingLevel::H2 => 1,
+        HeadingLevel::H3 => 2,
+        HeadingLevel::H4 => 3,
+        HeadingLevel::H5 => 4,
+        HeadingLevel::H6 => 5,
       };
-
-      let path = format!("{}/chapter_{}.md", src, i + 1);
-      fs::write(&path, &txt)?;
       summary.push_str(&format!(
         "{}- [{}](chapter_{}.md)\n",
-        " ".repeat((level.saturating_sub(1)) * 4),
-        title,
-        i + 1
+        " ".repeat(indent * 4),
+        chapter.title(),
+        chapter.number()
       ));
     }
 

book/en/book.toml

@@ -5,4 +5,8 @@ src = "src"
 title = "Just Programmer's Manual"
 
 [build]
-build-dir = "../../www/man/en"
+build-dir = "build"
+
+[output.html]
+
+[output.linkcheck]

book/zh/book.toml

@@ -5,4 +5,8 @@ src = "src"
 title = "Just 用户指南"
 
 [build]
-build-dir = "../../www/man/zh"
+build-dir = "build"
+
+[output.html]
+
+[output.linkcheck]

justfile

@@ -165,6 +165,11 @@ watch-readme:
 generate-completions:
   ./bin/generate-completions
 
+build-book:
+  cargo run --package generate-book
+  mdbook build book/en
+  mdbook build book/zh
+
 # run all polyglot recipes
 polyglot: _python _js _perl _sh _ruby
 # (recipes that start with `_` are hidden from --list)

www/man/en

@@ -0,0 +1 @@
+../../book/en/build/html/

www/man/zh

@@ -0,0 +1 @@
+../../book/zh/build/html/