Merge pull request #2389 from ehuss/bump-version

Update to 0.4.40
2025-12-28 16:12:33 -05:00 · 2024-05-17 01:35:51 +00:00 · 2024-05-16 18:29:30 -07:00 · 2024-05-17 01:19:17 +00:00 · 2024-05-16 18:10:56 -07:00 · 2024-05-16 18:08:09 -07:00
47 changed files with 1383 additions and 675 deletions
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -12,16 +12,9 @@ permissions:

 jobs:
  release:
-    name: Deploy Release
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
-        target:
-          - aarch64-unknown-linux-musl
-          - x86_64-unknown-linux-gnu
-          - x86_64-unknown-linux-musl
-          - x86_64-apple-darwin
-          - x86_64-pc-windows-msvc
        include:
          - target: aarch64-unknown-linux-musl
            os: ubuntu-20.04
@@ -33,8 +26,9 @@ jobs:
            os: macos-latest
          - target: x86_64-pc-windows-msvc
            os: windows-latest
+    name: Deploy ${{ matrix.target }}
    steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v4
    - name: Install Rust
      run: ci/install-rust.sh stable ${{ matrix.target }}
    - name: Build asset
@@ -47,7 +41,7 @@ jobs:
    name: GitHub Pages
    runs-on: ubuntu-latest
    steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v4
    - name: Install Rust (rustup)
      run: rustup update stable --no-self-update && rustup default stable
    - name: Build book
@@ -64,7 +58,7 @@ jobs:
    name: Publish to crates.io
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v4
      - name: Install Rust (rustup)
        run: rustup update stable --no-self-update && rustup default stable
      - name: Publish
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -5,45 +5,67 @@ on:

 jobs:
  test:
-    name: Test
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
-        build: [stable, beta, nightly, macos, windows, msrv]
        include:
-          - build: stable
+          - name: stable linux
            os: ubuntu-latest
            rust: stable
-          - build: beta
+            target: x86_64-unknown-linux-gnu
+          - name: beta linux
            os: ubuntu-latest
            rust: beta
-          - build: nightly
+            target: x86_64-unknown-linux-gnu
+          - name: nightly linux
            os: ubuntu-latest
            rust: nightly
-          - build: macos
+            target: x86_64-unknown-linux-gnu
+          - name: stable x86_64-unknown-linux-musl
+            os: ubuntu-20.04
+            rust: stable
+            target: x86_64-unknown-linux-musl
+          - name: stable x86_64 macos
            os: macos-latest
            rust: stable
-          - build: windows
+            target: x86_64-apple-darwin
+          - name: stable aarch64 macos
+            os: macos-latest
+            rust: stable
+            target: aarch64-apple-darwin
+          - name: stable windows-msvc
            os: windows-latest
            rust: stable
-          - build: msrv
+            target: x86_64-pc-windows-msvc
+          - name: msrv
            os: ubuntu-20.04
            # sync MSRV with docs: guide/src/guide/installation.md and Cargo.toml
-            rust: 1.71.0
+            rust: 1.74.0
+            target: x86_64-unknown-linux-gnu
+    name: ${{ matrix.name }}
    steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
    - name: Install Rust
-      run: bash ci/install-rust.sh ${{ matrix.rust }}
+      run: bash ci/install-rust.sh ${{ matrix.rust }} ${{ matrix.target }}
    - name: Build and run tests
-      run: cargo test --locked
+      run: cargo test --locked --target ${{ matrix.target }}
    - name: Test no default
-      run: cargo test --no-default-features
+      run: cargo test --no-default-features --target ${{ matrix.target }}
+
+  aarch64-cross-builds:
+    runs-on: ubuntu-20.04
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install Rust
+      run: bash ci/install-rust.sh stable aarch64-unknown-linux-musl
+    - name: Build
+      run: cargo build --locked --target aarch64-unknown-linux-musl

  rustfmt:
    name: Rustfmt
    runs-on: ubuntu-latest
    steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
    - name: Install Rust
      run: rustup update stable && rustup default stable && rustup component add rustfmt
    - run: cargo fmt --check
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,52 @@
 # Changelog

+## mdBook 0.4.40
+[v0.4.39...v0.4.40](https://github.com/rust-lang/mdBook/compare/v0.4.39...v0.4.40)
+
+### Fixed
+
+- Reverted the update to pulldown-cmark which broke the semver API.
+  [#2388](https://github.com/rust-lang/mdBook/pull/2388)
+
+## mdBook 0.4.39
+[v0.4.38...v0.4.39](https://github.com/rust-lang/mdBook/compare/v0.4.38...v0.4.39)
+
+### Fixed
+
+- Fixed the automatic deploy broken in the previous release.
+  [#2383](https://github.com/rust-lang/mdBook/pull/2383)
+
+## mdBook 0.4.38
+[v0.4.37...v0.4.38](https://github.com/rust-lang/mdBook/compare/v0.4.37...v0.4.38)
+
+### Added
+
+- Added `nix` to the default set of languages supported for syntax highlighting.
+  [#2262](https://github.com/rust-lang/mdBook/pull/2262)
+
+### Changed
+
+- The `output.html.curly-quotes` option has been renamed to `output.html.smart-punctuation` to better reflect what it does. The old option `curly-quotes` is kept for compatibility, but may be removed in the future.
+  [#2327](https://github.com/rust-lang/mdBook/pull/2327)
+- The file-watcher used in `mdbook serve` and `mdbook watch` now uses a poll-based watcher instead of the native operating system notifications. This should fix issues on various systems and environments, and more accurately detect when files change. The native watcher can still be used with the `--watcher native` CLI option.
+  [#2325](https://github.com/rust-lang/mdBook/pull/2325)
+- `mdbook test` output now includes color, and shows relative paths to the source.
+  [#2259](https://github.com/rust-lang/mdBook/pull/2259)
+- Updated dependencies, MSRV raised to 1.74
+  [#2350](https://github.com/rust-lang/mdBook/pull/2350)
+  [#2351](https://github.com/rust-lang/mdBook/pull/2351)
+  [#2378](https://github.com/rust-lang/mdBook/pull/2378)
+  [#2381](https://github.com/rust-lang/mdBook/pull/2381)
+
+### Fixed
+
+- Reduced memory allocation when copying files.
+  [#2355](https://github.com/rust-lang/mdBook/pull/2355)
+- Fixed the horizontal divider in `SUMMARY.md` from being indented into the previous nested section.
+  [#2364](https://github.com/rust-lang/mdBook/pull/2364)
+- Removed unnecessary `@import` in the CSS.
+  [#2260](https://github.com/rust-lang/mdBook/pull/2260)
+
 ## mdBook 0.4.37
 [v0.4.36...v0.4.37](https://github.com/rust-lang/mdBook/compare/v0.4.36...v0.4.37)

--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -148,7 +148,7 @@ The following are instructions for updating [highlight.js](https://highlightjs.o
 1. Clone the repository at <https://github.com/highlightjs/highlight.js>
 1. Check out a tagged release (like `10.1.1`).
 1. Run `npm install`
-1. Run `node tools/build.js :common apache armasm coffeescript d handlebars haskell http julia nginx nim properties r scala x86asm yaml`
+1. Run `node tools/build.js :common apache armasm coffeescript d handlebars haskell http julia nginx nim nix properties r scala x86asm yaml`
 1. Compare the language list that it spits out to the one in [`syntax-highlighting.md`](https://github.com/camelid/mdBook/blob/master/guide/src/format/theme/syntax-highlighting.md). If any are missing, add them to the list and rebuild (and update these docs). If any are added to the common set, add them to `syntax-highlighting.md`.
 1. Copy `build/highlight.min.js` to mdbook's directory [`highlight.js`](https://github.com/rust-lang/mdBook/blob/master/src/theme/highlight.js).
 1. Be sure to check the highlight.js [CHANGES](https://github.com/highlightjs/highlight.js/blob/main/CHANGES.md) for any breaking changes. Breaking changes that would affect users will need to wait until the next major release.
--- a/Cargo.lock
+++ b/Cargo.lock
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mdbook"
-version = "0.4.37"
+version = "0.4.40"
 authors = [
    "Mathieu David <mathieudavid@mathieudavid.org>",
    "Michael-F-Bryan <michaelfbryan@gmail.com>",
@@ -14,7 +14,7 @@ license = "MPL-2.0"
 readme = "README.md"
 repository = "https://github.com/rust-lang/mdBook"
 description = "Creates a book from markdown files"
-rust-version = "1.71"
+rust-version = "1.74"

 [dependencies]
 anyhow = "1.0.71"
@@ -26,8 +26,8 @@ env_logger = "0.11.1"
 handlebars = "5.0"
 log = "0.4.17"
 memchr = "2.5.0"
-opener = "0.6.1"
-pulldown-cmark = { version = "0.10.0", default-features = false, features = ["html"] }
+opener = "0.7.0"
+pulldown-cmark = { version = "0.10.0", default-features = false, features = ["html"] } # Do not update, part of the public api.
 regex = "1.8.1"
 serde = { version = "1.0.163", features = ["derive"] }
 serde_json = "1.0.96"
@@ -41,6 +41,7 @@ notify = { version = "6.1.1", optional = true }
 notify-debouncer-mini = { version = "0.4.1", optional = true }
 ignore = { version = "0.4.20", optional = true }
 pathdiff = { version = "0.2.1", optional = true }
+walkdir = { version = "2.3.3", optional = true }

 # Serve feature
 futures-util = { version = "0.3.28", optional = true }
@@ -49,7 +50,7 @@ warp = { version = "0.3.6", default-features = false, features = ["websocket"],

 # Search feature
 elasticlunr-rs = { version = "3.0.2", optional = true }
-ammonia = { version = "3.3.0", optional = true }
+ammonia = { version = "4.0.0", optional = true }

 [dev-dependencies]
 assert_cmd = "2.0.11"
@@ -61,7 +62,7 @@ walkdir = "2.3.3"

 [features]
 default = ["watch", "serve", "search"]
-watch = ["dep:notify", "dep:notify-debouncer-mini", "dep:ignore", "dep:pathdiff"]
+watch = ["dep:notify", "dep:notify-debouncer-mini", "dep:ignore", "dep:pathdiff", "dep:walkdir"]
 serve = ["dep:futures-util", "dep:tokio", "dep:warp"]
 search = ["dep:elasticlunr-rs", "dep:ammonia"]

--- a/ci/install-rust.sh
+++ b/ci/install-rust.sh
@@ -22,6 +22,19 @@ then
        rustup component add llvm-tools-preview --toolchain=$TOOLCHAIN
        rustup component add rust-std-$TARGET --toolchain=$TOOLCHAIN
    fi
+    if [[ $TARGET == *"musl" ]]
+    then
+        # This is needed by libdbus-sys.
+        sudo apt update -y && sudo apt install musl-dev musl-tools -y
+    fi
+    if [[ $TARGET == "aarch64-unknown-linux-musl" ]]
+    then
+        echo CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER=rust-lld >> $GITHUB_ENV
+        # This `CC` is some nonsense needed for libdbus-sys (via opener).
+        # I don't know if this is really the right thing to do, but it seems to work.
+        sudo apt install gcc-aarch64-linux-gnu -y
+        echo CC=aarch64-linux-gnu-gcc >> $GITHUB_ENV
+    fi
 fi

 rustup default $TOOLCHAIN
--- a/ci/make-release-asset.sh
+++ b/ci/make-release-asset.sh
@@ -12,10 +12,6 @@ TAG=${GITHUB_REF#*/tags/}

 host=$(rustc -Vv | grep ^host: | sed -e "s/host: //g")
 target=$2
-if [ "$host" != "$target" ]
-then
-  export "CARGO_TARGET_$(echo $target | tr a-z- A-Z_)_LINKER"=rust-lld
-fi
 export CARGO_PROFILE_RELEASE_LTO=true
 cargo build --locked --bin mdbook --release --target $target
 cd target/$target/release
--- a/guide/book.toml
+++ b/guide/book.toml
@@ -8,6 +8,7 @@ language = "en"
 edition = "2018"

 [output.html]
+smart-punctuation = true
 mathjax-support = true
 site-url = "/mdBook/"
 git-repository-url = "https://github.com/rust-lang/mdBook/tree/master/guide"
--- a/guide/src/cli/README.md
+++ b/guide/src/cli/README.md
@@ -5,10 +5,10 @@ After you have [installed](../guide/installation.md) `mdbook`, you can run the `

 This following sections provide in-depth information on the different commands available.

-* [`mdbook init <directory>`](init.md) — Creates a new book with minimal boilerplate to start with.
-* [`mdbook build`](build.md) — Renders the book.
-* [`mdbook watch`](watch.md) — Rebuilds the book any time a source file changes.
-* [`mdbook serve`](serve.md) — Runs a web server to view the book, and rebuilds on changes.
-* [`mdbook test`](test.md) — Tests Rust code samples.
-* [`mdbook clean`](clean.md) — Deletes the rendered output.
-* [`mdbook completions`](completions.md) — Support for shell auto-completion.
+* [`mdbook init <directory>`](init.md) --- Creates a new book with minimal boilerplate to start with.
+* [`mdbook build`](build.md) --- Renders the book.
+* [`mdbook watch`](watch.md) --- Rebuilds the book any time a source file changes.
+* [`mdbook serve`](serve.md) --- Runs a web server to view the book, and rebuilds on changes.
+* [`mdbook test`](test.md) --- Tests Rust code samples.
+* [`mdbook clean`](clean.md) --- Deletes the rendered output.
+* [`mdbook completions`](completions.md) --- Support for shell auto-completion.
--- a/guide/src/cli/arg-watcher.md
+++ b/guide/src/cli/arg-watcher.md
@@ -0,0 +1,7 @@
+#### `--watcher`
+
+There are different backends used to determine when a file has changed.
+
+* `poll` (default) --- Checks for file modifications by scanning the filesystem every second.
+* `native` --- Uses the native operating system facilities to receive notifications when files change.
+  This can have less constant overhead, but may not be as reliable as the `poll` based watcher. See these issues for more information: [#383](https://github.com/rust-lang/mdBook/issues/383) [#1441](https://github.com/rust-lang/mdBook/issues/1441) [#1707](https://github.com/rust-lang/mdBook/issues/1707) [#2035](https://github.com/rust-lang/mdBook/issues/2035) [#2102](https://github.com/rust-lang/mdBook/issues/2102)
--- a/guide/src/cli/build.md
+++ b/guide/src/cli/build.md
@@ -22,12 +22,12 @@ root instead of the current working directory.
 mdbook build path/to/book
 ```

-#### --open
+#### `--open`

 When you use the `--open` (`-o`) flag, mdbook will open the rendered book in
 your default web browser after building it.

-#### --dest-dir
+#### `--dest-dir`

 The `--dest-dir` (`-d`) option allows you to change the output directory for the
 book. Relative paths are interpreted relative to the book's root directory. If
--- a/guide/src/cli/clean.md
+++ b/guide/src/cli/clean.md
@@ -16,7 +16,7 @@ root instead of the current working directory.
 mdbook clean path/to/book
 ```

-#### --dest-dir
+#### `--dest-dir`

 The `--dest-dir` (`-d`) option allows you to override the book's output
 directory, which will be deleted by this command. Relative paths are interpreted
@@ -27,4 +27,4 @@ value of the `build.build-dir` key in `book.toml`, or to `./book`.
 mdbook clean --dest-dir=path/to/book
 ```

-`path/to/book` could be absolute or relative.
+`path/to/book` could be absolute or relative.
--- a/guide/src/cli/init.md
+++ b/guide/src/cli/init.md
@@ -45,7 +45,7 @@ instead of the current working directory.
 mdbook init path/to/book
 ```

-#### --theme
+#### `--theme`

 When you use the `--theme` flag, the default theme will be copied into a
 directory called `theme` in your source directory so that you can modify it.
@@ -53,7 +53,7 @@ directory called `theme` in your source directory so that you can modify it.
 The theme is selectively overwritten, this means that if you don't want to
 overwrite a specific file, just delete it and the default file will be used.

-#### --title
+#### `--title`

 Specify a title for the book. If not supplied, an interactive prompt will ask for 
 a title. 
@@ -62,7 +62,7 @@ a title.
 mdbook init --title="my amazing book"
 ```

-#### --ignore
+#### `--ignore`

 Create a `.gitignore` file configured to ignore the `book` directory created when [building] a book. 
 If not supplied, an interactive prompt will ask whether it should be created.
@@ -77,6 +77,6 @@ mdbook init --ignore=git

 [building]: build.md

-#### --force
+#### `--force`

 Skip the prompts to create a `.gitignore` and for the title for the book.
--- a/guide/src/cli/serve.md
+++ b/guide/src/cli/serve.md
@@ -32,18 +32,20 @@ The `serve` hostname defaults to `localhost`, and the port defaults to `3000`. E
 mdbook serve path/to/book -p 8000 -n 127.0.0.1 
 ```

-#### --open
+#### `--open`

 When you use the `--open` (`-o`) flag, mdbook will open the book in your
 default web browser after starting the server.

-#### --dest-dir
+#### `--dest-dir`

 The `--dest-dir` (`-d`) option allows you to change the output directory for the
 book. Relative paths are interpreted relative to the book's root directory. If
 not specified it will default to the value of the `build.build-dir` key in
 `book.toml`, or to `./book`.

+{{#include arg-watcher.md}}
+
 #### Specify exclude patterns

 The `serve` command will not automatically trigger a build for files listed in
--- a/guide/src/cli/test.md
+++ b/guide/src/cli/test.md
@@ -37,7 +37,7 @@ instead of the current working directory.
 mdbook test path/to/book
 ```

-#### --library-path
+#### `--library-path`

 The `--library-path` (`-L`) option allows you to add directories to the library
 search path used by `rustdoc` when it builds and tests the examples. Multiple
@@ -54,14 +54,14 @@ mdbook test my-book -L target/debug/deps/
 See the `rustdoc` command-line [documentation](https://doc.rust-lang.org/rustdoc/command-line-arguments.html#-l--library-path-where-to-look-for-dependencies)
 for more information.

-#### --dest-dir
+#### `--dest-dir`

 The `--dest-dir` (`-d`) option allows you to change the output directory for the
 book. Relative paths are interpreted relative to the book's root directory. If
 not specified it will default to the value of the `build.build-dir` key in
 `book.toml`, or to `./book`.

-#### --chapter
+#### `--chapter`

 The `--chapter` (`-c`) option allows you to test a specific chapter of the
 book using the chapter name or the relative path to the chapter.
--- a/guide/src/cli/watch.md
+++ b/guide/src/cli/watch.md
@@ -15,18 +15,19 @@ root instead of the current working directory.
 mdbook watch path/to/book
 ```

-#### --open
+#### `--open`

 When you use the `--open` (`-o`) option, mdbook will open the rendered book in
 your default web browser.

-#### --dest-dir
+#### `--dest-dir`

 The `--dest-dir` (`-d`) option allows you to change the output directory for the
 book. Relative paths are interpreted relative to the book's root directory. If
 not specified it will default to the value of the `build.build-dir` key in
 `book.toml`, or to `./book`.

+{{#include arg-watcher.md}}

 #### Specify exclude patterns

--- a/guide/src/continuous-integration.md
+++ b/guide/src/continuous-integration.md
@@ -21,7 +21,7 @@ A simple approach would be to use the popular `curl` CLI tool to download the ex

 ```sh
 mkdir bin
-curl -sSL https://github.com/rust-lang/mdBook/releases/download/v0.4.37/mdbook-v0.4.37-x86_64-unknown-linux-gnu.tar.gz | tar -xz --directory=bin
+curl -sSL https://github.com/rust-lang/mdBook/releases/download/v0.4.40/mdbook-v0.4.40-x86_64-unknown-linux-gnu.tar.gz | tar -xz --directory=bin
 bin/mdbook build
 ```

@@ -51,13 +51,13 @@ cargo install mdbook --no-default-features --features search --vers "^0.4" --loc

 This includes several recommended options:

-* `--no-default-features` — Disables features like the HTTP server used by `mdbook serve` that is likely not needed on CI.
+* `--no-default-features` --- Disables features like the HTTP server used by `mdbook serve` that is likely not needed on CI.
  This will speed up the build time significantly.
-* `--features search` — Disabling default features means you should then manually enable features that you want, such as the built-in [search] capability.
-* `--vers "^0.4"` — This will install the most recent version of the `0.4` series.
+* `--features search` --- Disabling default features means you should then manually enable features that you want, such as the built-in [search] capability.
+* `--vers "^0.4"` --- This will install the most recent version of the `0.4` series.
  However, versions after like `0.5.0` won't be installed, as they may break your build.
  Cargo will automatically upgrade mdBook if you have an older version already installed.
-* `--locked` — This will use the dependencies that were used when mdBook was released.
+* `--locked` --- This will use the dependencies that were used when mdBook was released.
  Without `--locked`, it will use the latest version of all dependencies, which may include some fixes since the last release, but may also (rarely) cause build problems.

 You will likely want to investigate caching options, as building mdBook can be somewhat slow.
--- a/guide/src/format/configuration/general.md
+++ b/guide/src/format/configuration/general.md
@@ -72,7 +72,7 @@ edition = "2015"   # the default edition for code blocks
 ```

 - **edition**: Rust edition to use by default for the code snippets. Default
-  is "2015". Individual code blocks can be controlled with the `edition2015`, 
+  is `"2015"`. Individual code blocks can be controlled with the `edition2015`,
  `edition2018` or `edition2021` annotations, such as:

  ~~~text
--- a/guide/src/format/configuration/renderers.md
+++ b/guide/src/format/configuration/renderers.md
@@ -4,9 +4,9 @@ Renderers (also called "backends") are responsible for creating the output of th

 The following backends are built-in:

-* [`html`](#html-renderer-options) — This renders the book to HTML.
+* [`html`](#html-renderer-options) --- This renders the book to HTML.
  This is enabled by default if no other `[output]` tables are defined in `book.toml`.
-* [`markdown`](#markdown-renderer) — This outputs the book as markdown after running the preprocessors.
+* [`markdown`](#markdown-renderer) --- This outputs the book as markdown after running the preprocessors.
  This is useful for debugging preprocessors.

 The community has developed several backends.
@@ -97,7 +97,7 @@ description = "The example book covers examples."
 theme = "my-theme"
 default-theme = "light"
 preferred-dark-theme = "navy"
-curly-quotes = true
+smart-punctuation = true
 mathjax-support = false
 copy-fonts = true
 additional-css = ["custom.css", "custom2.css"]
@@ -120,10 +120,12 @@ The following configuration options are available:
  'Change Theme' dropdown. Defaults to `light`.
 - **preferred-dark-theme:** The default dark theme. This theme will be used if
  the browser requests the dark version of the site via the
-  ['prefers-color-scheme'](https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme)
+  [`prefers-color-scheme`](https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme)
  CSS media query. Defaults to `navy`.
- **curly-quotes:** Convert straight quotes to curly quotes, except for those
-  that occur in code blocks and code spans. Defaults to `false`.
+- **smart-punctuation:** Converts quotes to curly quotes, `...` to `…`, `--` to en-dash, and `---` to em-dash.
+  See [Smart Punctuation].
+  Defaults to `false`.
+- **curly-quotes:** Deprecated alias for `smart-punctuation`.
 - **mathjax-support:** Adds support for [MathJax](../mathjax.md). Defaults to
  `false`.
 - **copy-fonts:** (**Deprecated**) If `true` (the default), mdBook uses its built-in fonts which are copied to the output directory.
--- a/guide/src/format/markdown.md
+++ b/guide/src/format/markdown.md
@@ -214,12 +214,12 @@ characters:
 So, no need to manually enter those Unicode characters!

 This feature is disabled by default.
-To enable it, see the [`output.html.curly-quotes`] config option.
+To enable it, see the [`output.html.smart-punctuation`] config option.

 [strikethrough]: https://github.github.com/gfm/#strikethrough-extension-
 [tables]: https://github.github.com/gfm/#tables-extension-
 [task list extension]: https://github.github.com/gfm/#task-list-items-extension-
-[`output.html.curly-quotes`]: configuration/renderers.md#html-renderer-options
+[`output.html.smart-punctuation`]: configuration/renderers.md#html-renderer-options

 ### Heading attributes

--- a/guide/src/format/mdbook.md
+++ b/guide/src/format/mdbook.md
@@ -112,16 +112,16 @@ panic!("oops!");
 These are particularly important when using [`mdbook test`] to test Rust examples.
 These use the same attributes as [rustdoc attributes], with a few additions:

-* `editable` — Enables the [editor].
-* `noplayground` — Removes the play button, but will still be tested.
-* `mdbook-runnable` — Forces the play button to be displayed.
+* `editable` --- Enables the [editor].
+* `noplayground` --- Removes the play button, but will still be tested.
+* `mdbook-runnable` --- Forces the play button to be displayed.
  This is intended to be combined with the `ignore` attribute for examples that should not be tested, but you want to allow the reader to run.
-* `ignore` — Will not be tested and no play button is shown, but it is still highlighted as Rust syntax.
-* `should_panic` — When executed, it should produce a panic.
-* `no_run` — The code is compiled when tested, but it is not run.
+* `ignore` --- Will not be tested and no play button is shown, but it is still highlighted as Rust syntax.
+* `should_panic` --- When executed, it should produce a panic.
+* `no_run` --- The code is compiled when tested, but it is not run.
  The play button is also not shown.
-* `compile_fail` — The code should fail to compile.
-* `edition2015`, `edition2018`, `edition2021` — Forces the use of a specific Rust edition.
+* `compile_fail` --- The code should fail to compile.
+* `edition2015`, `edition2018`, `edition2021` --- Forces the use of a specific Rust edition.
  See [`rust.edition`] to set this globally.

 [`mdbook test`]: ../cli/test.md
--- a/guide/src/format/theme/index-hbs.md
+++ b/guide/src/format/theme/index-hbs.md
@@ -18,7 +18,7 @@ handlebars template you can access this information by using
 Here is a list of the properties that are exposed:

 - ***language*** Language of the book in the form `en`, as specified in `book.toml` (if not specified, defaults to `en`). To use in <code
-  class="language-html">\<html lang="{{ language }}"></code> for example.
+  class="language-html">\<html lang=\"{{ language }}\"></code> for example.
 - ***title*** Title used for the current page. This is identical to `{{ chapter_title }} - {{ book_title }}` unless `book_title` is not set in which case it just defaults to the `chapter_title`.
 - ***book_title*** Title of the book, as specified in `book.toml`
 - ***chapter_title*** Title of the current chapter, as listed in `SUMMARY.md`
@@ -79,7 +79,7 @@ var chapters = {{chapters}};

 ### 2. previous / next

-The previous and next helpers expose a `link` and `name` property to the
+The previous and next helpers expose a `link` and `title` property to the
 previous and next chapters.

 They are used like this
@@ -87,7 +87,7 @@ They are used like this
 ```handlebars
 {{#previous}}
    <a href="{{link}}" class="nav-chapters previous">
-        <i class="fa fa-angle-left"></i>
+        <i class="fa fa-angle-left"></i> {{title}}
    </a>
 {{/previous}}
 ```
--- a/guide/src/format/theme/syntax-highlighting.md
+++ b/guide/src/format/theme/syntax-highlighting.md
@@ -45,6 +45,7 @@ your own `highlight.js` file:
 - markdown
 - nginx
 - nim
+- nix
 - objectivec
 - perl
 - php
--- a/guide/src/guide/installation.md
+++ b/guide/src/guide/installation.md
@@ -20,7 +20,7 @@ To make it easier to run, put the path to the binary into your `PATH`.

 To build the `mdbook` executable from source, you will first need to install Rust and Cargo.
 Follow the instructions on the [Rust installation page].
-mdBook currently requires at least Rust version 1.71.
+mdBook currently requires at least Rust version 1.74.

 Once you have installed Rust, the following command can be used to build and install mdBook:

--- a/src/book/book.rs
+++ b/src/book/book.rs
@@ -160,8 +160,20 @@ pub struct Chapter {
    /// Nested items.
    pub sub_items: Vec<BookItem>,
    /// The chapter's location, relative to the `SUMMARY.md` file.
+    ///
+    /// **Note**: After the index preprocessor runs, any README files will be
+    /// modified to be `index.md`. If you need access to the actual filename
+    /// on disk, use [`Chapter::source_path`] instead.
+    ///
+    /// This is `None` for a draft chapter.
    pub path: Option<PathBuf>,
    /// The chapter's source file, relative to the `SUMMARY.md` file.
+    ///
+    /// **Note**: Beware that README files will internally be treated as
+    /// `index.md` via the [`Chapter::path`] field. The `source_path` field
+    /// exists if you need access to the true file path.
+    ///
+    /// This is `None` for a draft chapter.
    pub source_path: Option<PathBuf>,
    /// An ordered list of the names of each chapter above this one in the hierarchy.
    pub parent_names: Vec<String>,
@@ -339,7 +351,6 @@ impl Display for Chapter {
 #[cfg(test)]
 mod tests {
    use super::*;
-    use std::io::Write;
    use tempfile::{Builder as TempFileBuilder, TempDir};

    const DUMMY_SRC: &str = "
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -15,10 +15,10 @@ pub use self::init::BookBuilder;
 pub use self::summary::{parse_summary, Link, SectionNumber, Summary, SummaryItem};

 use log::{debug, error, info, log_enabled, trace, warn};
-use std::io::Write;
-use std::path::PathBuf;
+use std::ffi::OsString;
+use std::io::{IsTerminal, Write};
+use std::path::{Path, PathBuf};
 use std::process::Command;
-use std::string::ToString;
 use tempfile::Builder as TempFileBuilder;
 use toml::Value;
 use topological_sort::TopologicalSort;
@@ -71,18 +71,24 @@ impl MDBook {

        config.update_from_env();

-        if config
-            .html_config()
-            .map_or(false, |html| html.google_analytics.is_some())
-        {
-            warn!(
-                "The output.html.google-analytics field has been deprecated; \
-                 it will be removed in a future release.\n\
-                 Consider placing the appropriate site tag code into the \
-                 theme/head.hbs file instead.\n\
-                 The tracking code may be found in the Google Analytics Admin page.\n\
-               "
-            );
+        if let Some(html_config) = config.html_config() {
+            if html_config.google_analytics.is_some() {
+                warn!(
+                    "The output.html.google-analytics field has been deprecated; \
+                     it will be removed in a future release.\n\
+                     Consider placing the appropriate site tag code into the \
+                     theme/head.hbs file instead.\n\
+                     The tracking code may be found in the Google Analytics Admin page.\n\
+                   "
+                );
+            }
+            if html_config.curly_quotes {
+                warn!(
+                    "The output.html.curly-quotes field has been renamed to \
+                     output.html.smart-punctuation.\n\
+                     Use the new name in book.toml to remove this warning."
+                );
+            }
        }

        if log_enabled!(log::Level::Trace) {
@@ -259,10 +265,18 @@ impl MDBook {
    /// Run `rustdoc` tests on a specific chapter of the book, linking against the provided libraries.
    /// If `chapter` is `None`, all tests will be run.
    pub fn test_chapter(&mut self, library_paths: Vec<&str>, chapter: Option<&str>) -> Result<()> {
-        let library_args: Vec<&str> = (0..library_paths.len())
-            .map(|_| "-L")
-            .zip(library_paths.into_iter())
-            .flat_map(|x| vec![x.0, x.1])
+        let cwd = std::env::current_dir()?;
+        let library_args: Vec<OsString> = library_paths
+            .into_iter()
+            .flat_map(|path| {
+                let path = Path::new(path);
+                let path = if path.is_relative() {
+                    cwd.join(path).into_os_string()
+                } else {
+                    path.to_path_buf().into_os_string()
+                };
+                [OsString::from("-L"), path]
+            })
            .collect();

        let temp_dir = TempFileBuilder::new().prefix("mdbook-").tempdir()?;
@@ -289,6 +303,7 @@ impl MDBook {
            .collect();
        let (book, _) = self.preprocess_book(&TestRenderer)?;

+        let color_output = std::io::stderr().is_terminal();
        let mut failed = false;
        for item in book.iter() {
            if let BookItem::Chapter(ref ch) = *item {
@@ -314,7 +329,10 @@ impl MDBook {
                tmpf.write_all(ch.content.as_bytes())?;

                let mut cmd = Command::new("rustdoc");
-                cmd.arg(&path).arg("--test").args(&library_args);
+                cmd.current_dir(temp_dir.path())
+                    .arg(chapter_path)
+                    .arg("--test")
+                    .args(&library_args);

                if let Some(edition) = self.config.rust.edition {
                    match edition {
@@ -330,6 +348,10 @@ impl MDBook {
                    }
                }

+                if color_output {
+                    cmd.args(["--color", "always"]);
+                }
+
                debug!("running {:?}", cmd);
                let output = cmd.output()?;

@@ -605,7 +627,7 @@ fn preprocessor_should_run(
 mod tests {
    use super::*;
    use std::str::FromStr;
-    use toml::value::{Table, Value};
+    use toml::value::Table;

    #[test]
    fn config_defaults_to_html_renderer_if_empty() {
--- a/src/book/summary.rs
+++ b/src/book/summary.rs
@@ -4,7 +4,6 @@ use memchr::Memchr;
 use pulldown_cmark::{DefaultBrokenLinkCallback, Event, HeadingLevel, Tag, TagEnd};
 use serde::{Deserialize, Serialize};
 use std::fmt::{self, Display, Formatter};
-use std::iter::FromIterator;
 use std::ops::{Deref, DerefMut};
 use std::path::{Path, PathBuf};

@@ -584,11 +583,13 @@ fn get_last_link(links: &mut [SummaryItem]) -> Result<(usize, &mut Link)> {
        .iter_mut()
        .enumerate()
        .filter_map(|(i, item)| item.maybe_link_mut().map(|l| (i, l)))
-        .rev()
-        .next()
-        .ok_or_else(||
-            anyhow::anyhow!("Unable to get last link because the list of SummaryItems doesn't contain any Links")
+        .next_back()
+        .ok_or_else(|| {
+            anyhow::anyhow!(
+                "Unable to get last link because the list of SummaryItems \
+                 doesn't contain any Links"
            )
+        })
 }

 /// Removes the styling from a list of Markdown events and returns just the
--- a/src/cmd/command_prelude.rs
+++ b/src/cmd/command_prelude.rs
@@ -36,6 +36,20 @@ pub trait CommandExt: Sized {
    fn arg_open(self) -> Self {
        self._arg(arg!(-o --open "Opens the compiled book in a web browser"))
    }
+
+    #[cfg(any(feature = "watch", feature = "serve"))]
+    fn arg_watcher(self) -> Self {
+        #[cfg(feature = "watch")]
+        return self._arg(
+            Arg::new("watcher")
+                .long("watcher")
+                .value_parser(["poll", "native"])
+                .default_value("poll")
+                .help("The filesystem watching technique"),
+        );
+        #[cfg(not(feature = "watch"))]
+        return self;
+    }
 }

 impl CommandExt for Command {
--- a/src/cmd/serve.rs
+++ b/src/cmd/serve.rs
@@ -6,7 +6,6 @@ use clap::builder::NonEmptyStringValueParser;
 use futures_util::sink::SinkExt;
 use futures_util::StreamExt;
 use mdbook::errors::*;
-use mdbook::utils;
 use mdbook::utils::fs::get_404_output_file;
 use mdbook::MDBook;
 use std::net::{SocketAddr, ToSocketAddrs};
@@ -43,12 +42,13 @@ pub fn make_subcommand() -> Command {
                .help("Port to use for HTTP connections"),
        )
        .arg_open()
+        .arg_watcher()
 }

 // Serve command implementation
 pub fn execute(args: &ArgMatches) -> Result<()> {
    let book_dir = get_book_dir(args);
-    let mut book = MDBook::load(book_dir)?;
+    let mut book = MDBook::load(&book_dir)?;

    let port = args.get_one::<String>("port").unwrap();
    let hostname = args.get_one::<String>("hostname").unwrap();
@@ -97,23 +97,12 @@ pub fn execute(args: &ArgMatches) -> Result<()> {
    }

    #[cfg(feature = "watch")]
-    watch::trigger_on_change(&book, move |paths, book_dir| {
-        info!("Files changed: {:?}", paths);
-        info!("Building book...");
-
-        // FIXME: This area is really ugly because we need to re-set livereload :(
-        let result = MDBook::load(book_dir).and_then(|mut b| {
-            update_config(&mut b);
-            b.build()
-        });
-
-        if let Err(e) = result {
-            error!("Unable to load the book");
-            utils::log_backtrace(&e);
-        } else {
+    {
+        let watcher = watch::WatcherKind::from_str(args.get_one::<String>("watcher").unwrap());
+        watch::rebuild_on_change(watcher, &book_dir, &update_config, &move || {
            let _ = tx.send(Message::text("reload"));
-        }
-    });
+        });
+    }

    let _ = thread_handle.join();

--- a/src/cmd/test.rs
+++ b/src/cmd/test.rs
@@ -1,7 +1,7 @@
 use super::command_prelude::*;
 use crate::get_book_dir;
 use clap::builder::NonEmptyStringValueParser;
-use clap::{Arg, ArgAction, ArgMatches, Command};
+use clap::ArgAction;
 use mdbook::errors::Result;
 use mdbook::MDBook;
 use std::path::PathBuf;
--- a/src/cmd/watch.rs
+++ b/src/cmd/watch.rs
@@ -1,14 +1,11 @@
 use super::command_prelude::*;
 use crate::{get_book_dir, open};
-use ignore::gitignore::Gitignore;
 use mdbook::errors::Result;
-use mdbook::utils;
 use mdbook::MDBook;
-use pathdiff::diff_paths;
 use std::path::{Path, PathBuf};
-use std::sync::mpsc::channel;
-use std::thread::sleep;
-use std::time::Duration;
+
+mod native;
+mod poller;

 // Create clap subcommand arguments
 pub fn make_subcommand() -> Command {
@@ -17,12 +14,28 @@ pub fn make_subcommand() -> Command {
        .arg_dest_dir()
        .arg_root_dir()
        .arg_open()
+        .arg_watcher()
+}
+
+pub enum WatcherKind {
+    Poll,
+    Native,
+}
+
+impl WatcherKind {
+    pub fn from_str(s: &str) -> WatcherKind {
+        match s {
+            "poll" => WatcherKind::Poll,
+            "native" => WatcherKind::Native,
+            _ => panic!("unsupported watcher {s}"),
+        }
+    }
 }

 // Watch command implementation
 pub fn execute(args: &ArgMatches) -> Result<()> {
    let book_dir = get_book_dir(args);
-    let mut book = MDBook::load(book_dir)?;
+    let mut book = MDBook::load(&book_dir)?;

    let update_config = |book: &mut MDBook| {
        if let Some(dest_dir) = args.get_one::<PathBuf>("dest-dir") {
@@ -41,42 +54,21 @@ pub fn execute(args: &ArgMatches) -> Result<()> {
        open(path);
    }

-    trigger_on_change(&book, |paths, book_dir| {
-        info!("Files changed: {:?}\nBuilding book...\n", paths);
-        let result = MDBook::load(book_dir).and_then(|mut b| {
-            update_config(&mut b);
-            b.build()
-        });
-
-        if let Err(e) = result {
-            error!("Unable to build the book");
-            utils::log_backtrace(&e);
-        }
-    });
+    let watcher = WatcherKind::from_str(args.get_one::<String>("watcher").unwrap());
+    rebuild_on_change(watcher, &book_dir, &update_config, &|| {});

    Ok(())
 }

-fn remove_ignored_files(book_root: &Path, paths: &[PathBuf]) -> Vec<PathBuf> {
-    if paths.is_empty() {
-        return vec![];
-    }
-
-    match find_gitignore(book_root) {
-        Some(gitignore_path) => {
-            let (ignore, err) = Gitignore::new(&gitignore_path);
-            if let Some(err) = err {
-                warn!(
-                    "error reading gitignore `{}`: {err}",
-                    gitignore_path.display()
-                );
-            }
-            filter_ignored_files(ignore, paths)
-        }
-        None => {
-            // There is no .gitignore file.
-            paths.iter().map(|path| path.to_path_buf()).collect()
-        }
+pub fn rebuild_on_change(
+    kind: WatcherKind,
+    book_dir: &Path,
+    update_config: &dyn Fn(&mut MDBook),
+    post_build: &dyn Fn(),
+) {
+    match kind {
+        WatcherKind::Poll => self::poller::rebuild_on_change(book_dir, update_config, post_build),
+        WatcherKind::Native => self::native::rebuild_on_change(book_dir, update_config, post_build),
    }
 }

@@ -86,144 +78,3 @@ fn find_gitignore(book_root: &Path) -> Option<PathBuf> {
        .map(|p| p.join(".gitignore"))
        .find(|p| p.exists())
 }
-
-// Note: The usage of `canonicalize` may encounter occasional failures on the Windows platform, presenting a potential risk.
-// For more details, refer to [Pull Request #2229](https://github.com/rust-lang/mdBook/pull/2229#discussion_r1408665981).
-fn filter_ignored_files(ignore: Gitignore, paths: &[PathBuf]) -> Vec<PathBuf> {
-    let ignore_root = ignore
-        .path()
-        .canonicalize()
-        .expect("ignore root canonicalize error");
-
-    paths
-        .iter()
-        .filter(|path| {
-            let relative_path =
-                diff_paths(&path, &ignore_root).expect("One of the paths should be an absolute");
-            !ignore
-                .matched_path_or_any_parents(&relative_path, relative_path.is_dir())
-                .is_ignore()
-        })
-        .map(|path| path.to_path_buf())
-        .collect()
-}
-
-/// Calls the closure when a book source file is changed, blocking indefinitely.
-pub fn trigger_on_change<F>(book: &MDBook, closure: F)
-where
-    F: Fn(Vec<PathBuf>, &Path),
-{
-    use notify::RecursiveMode::*;
-
-    // Create a channel to receive the events.
-    let (tx, rx) = channel();
-
-    let mut debouncer = match notify_debouncer_mini::new_debouncer(Duration::from_secs(1), tx) {
-        Ok(d) => d,
-        Err(e) => {
-            error!("Error while trying to watch the files:\n\n\t{:?}", e);
-            std::process::exit(1)
-        }
-    };
-    let watcher = debouncer.watcher();
-
-    // Add the source directory to the watcher
-    if let Err(e) = watcher.watch(&book.source_dir(), Recursive) {
-        error!("Error while watching {:?}:\n    {:?}", book.source_dir(), e);
-        std::process::exit(1);
-    };
-
-    let _ = watcher.watch(&book.theme_dir(), Recursive);
-
-    // Add the book.toml file to the watcher if it exists
-    let _ = watcher.watch(&book.root.join("book.toml"), NonRecursive);
-
-    for dir in &book.config.build.extra_watch_dirs {
-        let path = book.root.join(dir);
-        let canonical_path = path.canonicalize().unwrap_or_else(|e| {
-            error!("Error while watching extra directory {path:?}:\n    {e}");
-            std::process::exit(1);
-        });
-
-        if let Err(e) = watcher.watch(&canonical_path, Recursive) {
-            error!(
-                "Error while watching extra directory {:?}:\n    {:?}",
-                canonical_path, e
-            );
-            std::process::exit(1);
-        }
-    }
-
-    info!("Listening for changes...");
-
-    loop {
-        let first_event = rx.recv().unwrap();
-        sleep(Duration::from_millis(50));
-        let other_events = rx.try_iter();
-
-        let all_events = std::iter::once(first_event).chain(other_events);
-
-        let paths: Vec<_> = all_events
-            .filter_map(|event| match event {
-                Ok(events) => Some(events),
-                Err(error) => {
-                    log::warn!("error while watching for changes: {error}");
-                    None
-                }
-            })
-            .flatten()
-            .map(|event| event.path)
-            .collect();
-
-        // If we are watching files outside the current repository (via extra-watch-dirs), then they are definitionally
-        // ignored by gitignore. So we handle this case by including such files into the watched paths list.
-        let any_external_paths = paths.iter().filter(|p| !p.starts_with(&book.root)).cloned();
-        let mut paths = remove_ignored_files(&book.root, &paths[..]);
-        paths.extend(any_external_paths);
-
-        if !paths.is_empty() {
-            closure(paths, &book.root);
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use ignore::gitignore::GitignoreBuilder;
-    use std::env;
-
-    #[test]
-    fn test_filter_ignored_files() {
-        let current_dir = env::current_dir().unwrap();
-
-        let ignore = GitignoreBuilder::new(&current_dir)
-            .add_line(None, "*.html")
-            .unwrap()
-            .build()
-            .unwrap();
-        let should_remain = current_dir.join("record.text");
-        let should_filter = current_dir.join("index.html");
-
-        let remain = filter_ignored_files(ignore, &[should_remain.clone(), should_filter]);
-        assert_eq!(remain, vec![should_remain])
-    }
-
-    #[test]
-    fn filter_ignored_files_should_handle_parent_dir() {
-        let current_dir = env::current_dir().unwrap();
-
-        let ignore = GitignoreBuilder::new(&current_dir)
-            .add_line(None, "*.html")
-            .unwrap()
-            .build()
-            .unwrap();
-
-        let parent_dir = current_dir.join("..");
-        let should_remain = parent_dir.join("record.text");
-        let should_filter = parent_dir.join("index.html");
-
-        let remain = filter_ignored_files(ignore, &[should_remain.clone(), should_filter]);
-        assert_eq!(remain, vec![should_remain])
-    }
-}
--- a/src/cmd/watch/native.rs
+++ b/src/cmd/watch/native.rs
@@ -0,0 +1,189 @@
+//! A filesystem watcher using native operating system facilities.
+
+use ignore::gitignore::Gitignore;
+use mdbook::MDBook;
+use std::path::{Path, PathBuf};
+use std::sync::mpsc::channel;
+use std::thread::sleep;
+use std::time::Duration;
+
+pub fn rebuild_on_change(
+    book_dir: &Path,
+    update_config: &dyn Fn(&mut MDBook),
+    post_build: &dyn Fn(),
+) {
+    use notify::RecursiveMode::*;
+
+    let mut book = MDBook::load(book_dir).unwrap_or_else(|e| {
+        error!("failed to load book: {e}");
+        std::process::exit(1);
+    });
+
+    // Create a channel to receive the events.
+    let (tx, rx) = channel();
+
+    let mut debouncer = match notify_debouncer_mini::new_debouncer(Duration::from_secs(1), tx) {
+        Ok(d) => d,
+        Err(e) => {
+            error!("Error while trying to watch the files:\n\n\t{:?}", e);
+            std::process::exit(1)
+        }
+    };
+    let watcher = debouncer.watcher();
+
+    // Add the source directory to the watcher
+    if let Err(e) = watcher.watch(&book.source_dir(), Recursive) {
+        error!("Error while watching {:?}:\n    {:?}", book.source_dir(), e);
+        std::process::exit(1);
+    };
+
+    let _ = watcher.watch(&book.theme_dir(), Recursive);
+
+    // Add the book.toml file to the watcher if it exists
+    let _ = watcher.watch(&book.root.join("book.toml"), NonRecursive);
+
+    for dir in &book.config.build.extra_watch_dirs {
+        let path = book.root.join(dir);
+        let canonical_path = path.canonicalize().unwrap_or_else(|e| {
+            error!("Error while watching extra directory {path:?}:\n    {e}");
+            std::process::exit(1);
+        });
+
+        if let Err(e) = watcher.watch(&canonical_path, Recursive) {
+            error!(
+                "Error while watching extra directory {:?}:\n    {:?}",
+                canonical_path, e
+            );
+            std::process::exit(1);
+        }
+    }
+
+    info!("Listening for changes...");
+
+    loop {
+        let first_event = rx.recv().unwrap();
+        sleep(Duration::from_millis(50));
+        let other_events = rx.try_iter();
+
+        let all_events = std::iter::once(first_event).chain(other_events);
+
+        let paths: Vec<_> = all_events
+            .filter_map(|event| match event {
+                Ok(events) => Some(events),
+                Err(error) => {
+                    log::warn!("error while watching for changes: {error}");
+                    None
+                }
+            })
+            .flatten()
+            .map(|event| event.path)
+            .collect();
+
+        // If we are watching files outside the current repository (via extra-watch-dirs), then they are definitionally
+        // ignored by gitignore. So we handle this case by including such files into the watched paths list.
+        let any_external_paths = paths.iter().filter(|p| !p.starts_with(&book.root)).cloned();
+        let mut paths = remove_ignored_files(&book.root, &paths[..]);
+        paths.extend(any_external_paths);
+
+        if !paths.is_empty() {
+            info!("Files changed: {paths:?}");
+            match MDBook::load(book_dir) {
+                Ok(mut b) => {
+                    update_config(&mut b);
+                    if let Err(e) = b.build() {
+                        error!("failed to build the book: {e:?}");
+                    } else {
+                        post_build();
+                    }
+                    book = b;
+                }
+                Err(e) => error!("failed to load book config: {e:?}"),
+            }
+        }
+    }
+}
+
+fn remove_ignored_files(book_root: &Path, paths: &[PathBuf]) -> Vec<PathBuf> {
+    if paths.is_empty() {
+        return vec![];
+    }
+
+    match super::find_gitignore(book_root) {
+        Some(gitignore_path) => {
+            let (ignore, err) = Gitignore::new(&gitignore_path);
+            if let Some(err) = err {
+                warn!(
+                    "error reading gitignore `{}`: {err}",
+                    gitignore_path.display()
+                );
+            }
+            filter_ignored_files(ignore, paths)
+        }
+        None => {
+            // There is no .gitignore file.
+            paths.iter().map(|path| path.to_path_buf()).collect()
+        }
+    }
+}
+
+// Note: The usage of `canonicalize` may encounter occasional failures on the Windows platform, presenting a potential risk.
+// For more details, refer to [Pull Request #2229](https://github.com/rust-lang/mdBook/pull/2229#discussion_r1408665981).
+fn filter_ignored_files(ignore: Gitignore, paths: &[PathBuf]) -> Vec<PathBuf> {
+    let ignore_root = ignore
+        .path()
+        .canonicalize()
+        .expect("ignore root canonicalize error");
+
+    paths
+        .iter()
+        .filter(|path| {
+            let relative_path = pathdiff::diff_paths(&path, &ignore_root)
+                .expect("One of the paths should be an absolute");
+            !ignore
+                .matched_path_or_any_parents(&relative_path, relative_path.is_dir())
+                .is_ignore()
+        })
+        .map(|path| path.to_path_buf())
+        .collect()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use ignore::gitignore::GitignoreBuilder;
+    use std::env;
+
+    #[test]
+    fn test_filter_ignored_files() {
+        let current_dir = env::current_dir().unwrap();
+
+        let ignore = GitignoreBuilder::new(&current_dir)
+            .add_line(None, "*.html")
+            .unwrap()
+            .build()
+            .unwrap();
+        let should_remain = current_dir.join("record.text");
+        let should_filter = current_dir.join("index.html");
+
+        let remain = filter_ignored_files(ignore, &[should_remain.clone(), should_filter]);
+        assert_eq!(remain, vec![should_remain])
+    }
+
+    #[test]
+    fn filter_ignored_files_should_handle_parent_dir() {
+        let current_dir = env::current_dir().unwrap();
+
+        let ignore = GitignoreBuilder::new(&current_dir)
+            .add_line(None, "*.html")
+            .unwrap()
+            .build()
+            .unwrap();
+
+        let parent_dir = current_dir.join("..");
+        let should_remain = parent_dir.join("record.text");
+        let should_filter = parent_dir.join("index.html");
+
+        let remain = filter_ignored_files(ignore, &[should_remain.clone(), should_filter]);
+        assert_eq!(remain, vec![should_remain])
+    }
+}
--- a/src/cmd/watch/poller.rs
+++ b/src/cmd/watch/poller.rs
@@ -0,0 +1,386 @@
+//! A simple poll-based filesystem watcher.
+//!
+//! This exists because the native change notifications have historically had
+//! lots of problems. Various operating systems and different filesystems have
+//! had problems correctly reporting changes.
+
+use ignore::gitignore::Gitignore;
+use mdbook::MDBook;
+use pathdiff::diff_paths;
+use std::collections::HashMap;
+use std::fs::FileType;
+use std::path::{Path, PathBuf};
+use std::time::{Duration, Instant, SystemTime};
+use walkdir::WalkDir;
+
+/// Calls the closure when a book source file is changed, blocking indefinitely.
+pub fn rebuild_on_change(
+    book_dir: &Path,
+    update_config: &dyn Fn(&mut MDBook),
+    post_build: &dyn Fn(),
+) {
+    let mut book = MDBook::load(book_dir).unwrap_or_else(|e| {
+        error!("failed to load book: {e}");
+        std::process::exit(1);
+    });
+
+    let mut watcher = Watcher::new(book_dir);
+
+    info!("Watching for changes...");
+    // Scan once to initialize the starting point.
+    watcher.set_roots(&book);
+    watcher.scan();
+
+    // Track average scan time, to help investigate if the poller is taking
+    // undesirably long. This is not a rigorous benchmark, just a rough
+    // estimate.
+    const AVG_SIZE: usize = 60;
+    let mut avgs = vec![0.0; AVG_SIZE];
+    let mut avg_i = 0;
+
+    loop {
+        std::thread::sleep(Duration::new(1, 0));
+        watcher.set_roots(&book);
+        let start = Instant::now();
+        let paths = watcher.scan();
+        let elapsed = start.elapsed().as_secs_f64();
+        avgs[avg_i] = elapsed;
+        avg_i += 1;
+        if avg_i >= AVG_SIZE {
+            avg_i = 0;
+            let avg = avgs.iter().sum::<f64>() / (avgs.len() as f64);
+            trace!(
+                "scan average time: {avg:.2}s, scan size is {}",
+                watcher.path_data.len()
+            );
+        }
+
+        if !paths.is_empty() {
+            info!("Files changed: {paths:?}");
+            match MDBook::load(book_dir) {
+                Ok(mut b) => {
+                    update_config(&mut b);
+                    if let Err(e) = b.build() {
+                        error!("failed to build the book: {e:?}");
+                    } else {
+                        post_build();
+                    }
+                    book = b;
+                }
+                Err(e) => error!("failed to load book config: {e:?}"),
+            }
+        }
+    }
+}
+
+#[derive(PartialEq)]
+struct PathData {
+    file_type: FileType,
+    mtime: SystemTime,
+    size: u64,
+}
+
+/// A very simple poll-watcher that scans for modified files.
+#[derive(Default)]
+struct Watcher {
+    /// The root paths where it will recursively scan for changes.
+    root_paths: Vec<PathBuf>,
+    /// Data about files on disk.
+    path_data: HashMap<PathBuf, PathData>,
+    /// Filters paths that will be watched.
+    ignore: Option<(PathBuf, Gitignore)>,
+}
+
+impl Watcher {
+    fn new(book_root: &Path) -> Watcher {
+        // FIXME: ignore should be reloaded when it changes.
+        let ignore = super::find_gitignore(book_root).map(|gitignore_path| {
+            let (ignore, err) = Gitignore::new(&gitignore_path);
+            if let Some(err) = err {
+                warn!(
+                    "error reading gitignore `{}`: {err}",
+                    gitignore_path.display()
+                );
+            }
+            // Note: The usage of `canonicalize` may encounter occasional
+            // failures on the Windows platform, presenting a potential risk.
+            // For more details, refer to [Pull Request
+            // #2229](https://github.com/rust-lang/mdBook/pull/2229#discussion_r1408665981).
+            let ignore_path = ignore
+                .path()
+                .canonicalize()
+                .expect("ignore root canonicalize error");
+            (ignore_path, ignore)
+        });
+
+        Watcher {
+            ignore,
+            ..Default::default()
+        }
+    }
+
+    /// Sets the root directories where scanning will start.
+    fn set_roots(&mut self, book: &MDBook) {
+        let mut root_paths = vec![
+            book.source_dir(),
+            book.theme_dir(),
+            book.root.join("book.toml"),
+        ];
+        root_paths.extend(
+            book.config
+                .build
+                .extra_watch_dirs
+                .iter()
+                .map(|path| book.root.join(path)),
+        );
+        if let Some(html_config) = book.config.html_config() {
+            root_paths.extend(
+                html_config
+                    .additional_css
+                    .iter()
+                    .chain(html_config.additional_js.iter())
+                    .map(|path| book.root.join(path)),
+            );
+        }
+
+        self.root_paths = root_paths;
+    }
+
+    /// Scans for changes.
+    ///
+    /// Returns the paths that have changed.
+    fn scan(&mut self) -> Vec<PathBuf> {
+        let ignore = &self.ignore;
+        let new_path_data: HashMap<_, _> = self
+            .root_paths
+            .iter()
+            .filter(|root| root.exists())
+            .flat_map(|root| {
+                WalkDir::new(root)
+                    .follow_links(true)
+                    .into_iter()
+                    .filter_entry(|entry| {
+                        if let Some((ignore_path, ignore)) = ignore {
+                            let path = entry.path();
+                            // Canonicalization helps with removing `..` and
+                            // `.` entries, which can cause issues with
+                            // diff_paths.
+                            let path = path.canonicalize().unwrap_or_else(|_| path.to_path_buf());
+                            let relative_path = diff_paths(&path, &ignore_path)
+                                .expect("One of the paths should be an absolute");
+                            if ignore
+                                .matched_path_or_any_parents(&relative_path, relative_path.is_dir())
+                                .is_ignore()
+                            {
+                                trace!("ignoring {path:?}");
+                                return false;
+                            }
+                        }
+                        true
+                    })
+                    .filter_map(move |entry| {
+                        let entry = match entry {
+                            Ok(e) => e,
+                            Err(e) => {
+                                debug!("failed to scan {root:?}: {e}");
+                                return None;
+                            }
+                        };
+                        if entry.file_type().is_dir() {
+                            // Changes to directories themselves aren't
+                            // particularly interesting.
+                            return None;
+                        }
+                        let path = entry.path().to_path_buf();
+
+                        let meta = match entry.metadata() {
+                            Ok(meta) => meta,
+                            Err(e) => {
+                                debug!("failed to scan {path:?}: {e}");
+                                return None;
+                            }
+                        };
+                        let mtime = meta.modified().unwrap_or(SystemTime::UNIX_EPOCH);
+                        let pd = PathData {
+                            file_type: meta.file_type(),
+                            mtime,
+                            size: meta.len(),
+                        };
+                        Some((path, pd))
+                    })
+            })
+            .collect();
+        let mut paths = Vec::new();
+        for (new_path, new_data) in &new_path_data {
+            match self.path_data.get(new_path) {
+                Some(old_data) => {
+                    if new_data != old_data {
+                        paths.push(new_path.to_path_buf());
+                    }
+                }
+                None => {
+                    paths.push(new_path.clone());
+                }
+            }
+        }
+        for old_path in self.path_data.keys() {
+            if !new_path_data.contains_key(old_path) {
+                paths.push(old_path.to_path_buf());
+            }
+        }
+        self.path_data = new_path_data;
+        paths
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    /// Helper for testing the watcher.
+    fn check_watch_behavior(
+        gitignore_path: &str,
+        gitignore: &str,
+        book_root_path: &str,
+        ignored: &[&str],
+        not_ignored: &[&str],
+        extra_setup: &dyn Fn(&Path),
+    ) {
+        // Create the book and initialize things.
+        let temp = tempfile::Builder::new()
+            .prefix("mdbook-")
+            .tempdir()
+            .unwrap();
+        let root = temp.path();
+        let book_root = root.join(book_root_path);
+        // eprintln!("book_root={book_root:?}",);
+        MDBook::init(&book_root).build().unwrap();
+        std::fs::write(root.join(gitignore_path), gitignore).unwrap();
+        let create = |paths: &[&str]| {
+            let mut paths = paths
+                .iter()
+                .map(|path| root.join(path))
+                .inspect(|path| {
+                    std::fs::create_dir_all(path.parent().unwrap()).unwrap();
+                    std::fs::write(path, "initial content").unwrap();
+                })
+                .map(|path| path.canonicalize().unwrap())
+                .collect::<Vec<_>>();
+            paths.sort();
+            paths
+        };
+        let ignored = create(ignored);
+        let not_ignored = create(not_ignored);
+        extra_setup(&book_root);
+        // Create a watcher and check its behavior.
+        let book = MDBook::load(&book_root).unwrap();
+        let mut watcher = Watcher::new(&book_root);
+        watcher.set_roots(&book);
+        // Do an initial scan to initialize its state.
+        watcher.scan();
+        // Verify the steady state is empty.
+        let changed = watcher.scan();
+        assert_eq!(changed, Vec::<PathBuf>::new());
+        // Modify all files, and verify that only not_ignored are detected.
+        for path in ignored.iter().chain(not_ignored.iter()) {
+            std::fs::write(path, "modified").unwrap();
+        }
+        let changed = watcher.scan();
+        let mut changed = changed
+            .into_iter()
+            .map(|p| p.canonicalize().unwrap())
+            .collect::<Vec<_>>();
+        changed.sort();
+        assert_eq!(changed, not_ignored);
+        // Verify again that steady state is empty.
+        let changed = watcher.scan();
+        assert_eq!(changed, Vec::<PathBuf>::new());
+    }
+
+    #[test]
+    fn test_ignore() {
+        // Basic gitignore test.
+        check_watch_behavior(
+            "foo/.gitignore",
+            "*.tmp",
+            "foo",
+            &["foo/src/somefile.tmp"],
+            &["foo/src/chapter.md"],
+            &|_book_root| {},
+        );
+    }
+
+    #[test]
+    fn test_ignore_in_parent() {
+        // gitignore is in the parent of the book
+        check_watch_behavior(
+            ".gitignore",
+            "*.tmp\nsomedir/\n/inroot\n/foo/src/inbook\n",
+            "foo",
+            &[
+                "foo/src/somefile.tmp",
+                "foo/src/somedir/somefile",
+                "inroot/somefile",
+                "foo/src/inbook/somefile",
+            ],
+            &["foo/src/inroot/somefile"],
+            &|_book_root| {},
+        );
+    }
+
+    #[test]
+    fn test_ignore_canonical() {
+        // test with path with ..
+        check_watch_behavior(
+            ".gitignore",
+            "*.tmp\nsomedir/\n/foo/src/inbook\n",
+            "bar/../foo",
+            &[
+                "foo/src/somefile.tmp",
+                "foo/src/somedir/somefile",
+                "foo/src/inbook/somefile",
+            ],
+            &["foo/src/chapter.md"],
+            &|_book_root| {},
+        );
+    }
+
+    #[test]
+    fn test_scan_extra_watch() {
+        // Check behavior with extra-watch-dirs
+        check_watch_behavior(
+            ".gitignore",
+            "*.tmp\n/outside-root/ignoreme\n/foo/examples/ignoreme\n",
+            "foo",
+            &[
+                "foo/src/somefile.tmp",
+                "foo/examples/example.tmp",
+                "outside-root/somefile.tmp",
+                "outside-root/ignoreme",
+                "foo/examples/ignoreme",
+            ],
+            &[
+                "foo/src/chapter.md",
+                "foo/examples/example.rs",
+                "foo/examples/example2.rs",
+                "outside-root/image.png",
+            ],
+            &|book_root| {
+                std::fs::write(
+                    book_root.join("book.toml"),
+                    r#"
+                        [book]
+                        title = "foo"
+
+                        [build]
+                        extra-watch-dirs = [
+                            "examples",
+                            "../outside-root",
+                        ]
+                    "#,
+                )
+                .unwrap();
+            },
+        );
+    }
+}
--- a/src/config.rs
+++ b/src/config.rs
@@ -58,7 +58,7 @@ use std::io::Read;
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
 use toml::value::Table;
-use toml::{self, Value};
+use toml::Value;

 use crate::errors::*;
 use crate::utils::{self, toml_ext::TomlExt};
@@ -526,7 +526,9 @@ pub struct HtmlConfig {
    /// The theme to use if the browser requests the dark version of the site.
    /// Defaults to 'navy'.
    pub preferred_dark_theme: Option<String>,
-    /// Use "smart quotes" instead of the usual `"` character.
+    /// Supports smart quotes, apostrophes, ellipsis, en-dash, and em-dash.
+    pub smart_punctuation: bool,
+    /// Deprecated alias for `smart_punctuation`.
    pub curly_quotes: bool,
    /// Should mathjax be enabled?
    pub mathjax_support: bool,
@@ -590,6 +592,7 @@ impl Default for HtmlConfig {
            theme: None,
            default_theme: None,
            preferred_dark_theme: None,
+            smart_punctuation: false,
            curly_quotes: false,
            mathjax_support: false,
            copy_fonts: true,
@@ -623,6 +626,11 @@ impl HtmlConfig {
            None => root.join("theme"),
        }
    }
+
+    /// Returns `true` if smart punctuation is enabled.
+    pub fn smart_punctuation(&self) -> bool {
+        self.smart_punctuation || self.curly_quotes
+    }
 }

 /// Configuration for how to render the print icon, print.html, and print.css.
@@ -656,7 +664,7 @@ pub struct Fold {
    pub level: u8,
 }

-/// Configuration for tweaking how the the HTML renderer handles the playground.
+/// Configuration for tweaking how the HTML renderer handles the playground.
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 #[serde(default, rename_all = "kebab-case")]
 pub struct Playground {
@@ -685,22 +693,14 @@ impl Default for Playground {
    }
 }

-/// Configuration for tweaking how the the HTML renderer handles code blocks.
-#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+/// Configuration for tweaking how the HTML renderer handles code blocks.
+#[derive(Debug, Default, Clone, PartialEq, Serialize, Deserialize)]
 #[serde(default, rename_all = "kebab-case")]
 pub struct Code {
    /// A prefix string to hide lines per language (one or more chars).
    pub hidelines: HashMap<String, String>,
 }

-impl Default for Code {
-    fn default() -> Code {
-        Code {
-            hidelines: HashMap::new(),
-        }
-    }
-}
-
 /// Configuration of the search functionality of the HTML renderer.
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 #[serde(default, rename_all = "kebab-case")]
@@ -798,7 +798,7 @@ mod tests {
        [output.html]
        theme = "./themedir"
        default-theme = "rust"
-        curly-quotes = true
+        smart-punctuation = true
        google-analytics = "123456"
        additional-css = ["./foo/bar/baz.css"]
        git-repository-url = "https://foo.com/"
@@ -845,7 +845,7 @@ mod tests {
            runnable: true,
        };
        let html_should_be = HtmlConfig {
-            curly_quotes: true,
+            smart_punctuation: true,
            google_analytics: Some(String::from("123456")),
            additional_css: vec![PathBuf::from("./foo/bar/baz.css")],
            theme: Some(PathBuf::from("./themedir")),
@@ -1025,7 +1025,7 @@ mod tests {
        [output.html]
        destination = "my-book" # the output files will be generated in `root/my-book` instead of `root/book`
        theme = "my-theme"
-        curly-quotes = true
+        smart-punctuation = true
        google-analytics = "123456"
        additional-css = ["custom.css", "custom2.css"]
        additional-js = ["custom.js"]
@@ -1050,7 +1050,7 @@ mod tests {

        let html_should_be = HtmlConfig {
            theme: Some(PathBuf::from("my-theme")),
-            curly_quotes: true,
+            smart_punctuation: true,
            google_analytics: Some(String::from("123456")),
            additional_css: vec![PathBuf::from("custom.css"), PathBuf::from("custom2.css")],
            additional_js: vec![PathBuf::from("custom.js")],
@@ -1320,4 +1320,37 @@ mod tests {
        assert!(html_config.print.enable);
        assert!(!html_config.print.page_break);
    }
+
+    #[test]
+    fn curly_quotes_or_smart_punctuation() {
+        let src = r#"
+        [book]
+        title = "mdBook Documentation"
+
+        [output.html]
+        smart-punctuation = true
+        "#;
+        let config = Config::from_str(src).unwrap();
+        assert_eq!(config.html_config().unwrap().smart_punctuation(), true);
+
+        let src = r#"
+        [book]
+        title = "mdBook Documentation"
+
+        [output.html]
+        curly-quotes = true
+        "#;
+        let config = Config::from_str(src).unwrap();
+        assert_eq!(config.html_config().unwrap().smart_punctuation(), true);
+
+        let src = r#"
+        [book]
+        title = "mdBook Documentation"
+        "#;
+        let config = Config::from_str(src).unwrap();
+        assert_eq!(
+            config.html_config().unwrap_or_default().smart_punctuation(),
+            false
+        );
+    }
 }
--- a/src/renderer/html_handlebars/hbs_renderer.rs
+++ b/src/renderer/html_handlebars/hbs_renderer.rs
@@ -54,10 +54,13 @@ impl HtmlHandlebars {
                .insert("git_repository_edit_url".to_owned(), json!(edit_url));
        }

-        let content = utils::render_markdown(&ch.content, ctx.html_config.curly_quotes);
+        let content = utils::render_markdown(&ch.content, ctx.html_config.smart_punctuation());

-        let fixed_content =
-            utils::render_markdown_with_path(&ch.content, ctx.html_config.curly_quotes, Some(path));
+        let fixed_content = utils::render_markdown_with_path(
+            &ch.content,
+            ctx.html_config.smart_punctuation(),
+            Some(path),
+        );
        if !ctx.is_index && ctx.html_config.print.page_break {
            // Add page break between chapters
            // See https://developer.mozilla.org/en-US/docs/Web/CSS/break-before and https://developer.mozilla.org/en-US/docs/Web/CSS/page-break-before
@@ -164,7 +167,8 @@ impl HtmlHandlebars {
                    .to_string()
            }
        };
-        let html_content_404 = utils::render_markdown(&content_404, html_config.curly_quotes);
+        let html_content_404 =
+            utils::render_markdown(&content_404, html_config.smart_punctuation());

        let mut data_404 = data.clone();
        let base_url = if let Some(site_url) = &html_config.site_url {
@@ -202,7 +206,7 @@ impl HtmlHandlebars {
        Ok(())
    }

-    #[cfg_attr(feature = "cargo-clippy", allow(clippy::let_and_return))]
+    #[allow(clippy::let_and_return)]
    fn post_process(
        &self,
        rendered: String,
--- a/src/renderer/html_handlebars/helpers/toc.rs
+++ b/src/renderer/html_handlebars/helpers/toc.rs
@@ -74,12 +74,6 @@ impl HelperDef for RenderToc {
        let mut is_first_chapter = ctx.data().get("is_index").is_some();

        for item in chapters {
-            // Spacer
-            if item.get("spacer").is_some() {
-                out.write("<li class=\"spacer\"></li>")?;
-                continue;
-            }
-
            let (section, level) = if let Some(s) = item.get("section") {
                (s.as_str(), s.matches('.').count())
            } else {
@@ -114,10 +108,16 @@ impl HelperDef for RenderToc {
                    write_li_open_tag(out, is_expanded, false)?;
                }
                Ordering::Equal => {
-                    write_li_open_tag(out, is_expanded, item.get("section").is_none())?;
+                    write_li_open_tag(out, is_expanded, !item.contains_key("section"))?;
                }
            }

+            // Spacer
+            if item.contains_key("spacer") {
+                out.write("<li class=\"spacer\"></li>")?;
+                continue;
+            }
+
            // Part title
            if let Some(title) = item.get("part") {
                out.write("<li class=\"part-title\">")?;
--- a/src/theme/css/chrome.css
+++ b/src/theme/css/chrome.css
@@ -1,7 +1,5 @@
 /* CSS for UI elements (a.k.a. chrome) */

-@import 'variables.css';
-
 html {
    scrollbar-color: var(--scrollbar) var(--bg);
 }
--- a/src/theme/css/general.css
+++ b/src/theme/css/general.css
@@ -1,7 +1,5 @@
 /* Base styles and content styles */

-@import 'variables.css';
-
 :root {
    /* Browser default font-size is 16px, this way 1 rem = 10px */
    font-size: 62.5%;
--- a/src/theme/highlight.js
+++ b/src/theme/highlight.js
--- a/src/theme/mod.rs
+++ b/src/theme/mod.rs
@@ -212,7 +212,6 @@ fn load_file_contents<P: AsRef<Path>>(filename: P, dest: &mut Vec<u8>) -> Result
 mod tests {
    use super::*;
    use std::fs;
-    use std::path::PathBuf;
    use tempfile::Builder as TempFileBuilder;

    #[test]
--- a/src/utils/fs.rs
+++ b/src/utils/fs.rs
@@ -1,6 +1,5 @@
 use crate::errors::*;
 use log::{debug, trace};
-use std::convert::Into;
 use std::fs::{self, File};
 use std::io::Write;
 use std::path::{Component, Path, PathBuf};
@@ -73,14 +72,12 @@ pub fn create_file(path: &Path) -> Result<File> {

 /// Removes all the content of a directory but not the directory itself
 pub fn remove_dir_content(dir: &Path) -> Result<()> {
-    for item in fs::read_dir(dir)? {
-        if let Ok(item) = item {
-            let item = item.path();
-            if item.is_dir() {
-                fs::remove_dir_all(item)?;
-            } else {
-                fs::remove_file(item)?;
-            }
+    for item in fs::read_dir(dir)?.flatten() {
+        let item = item.path();
+        if item.is_dir() {
+            fs::remove_dir_all(item)?;
+        } else {
+            fs::remove_file(item)?;
        }
    }
    Ok(())
@@ -109,72 +106,41 @@ pub fn copy_files_except_ext(
    }

    for entry in fs::read_dir(from)? {
-        let entry = entry?;
+        let entry = entry?.path();
        let metadata = entry
-            .path()
            .metadata()
-            .with_context(|| format!("Failed to read {:?}", entry.path()))?;
+            .with_context(|| format!("Failed to read {entry:?}"))?;
+
+        let entry_file_name = entry.file_name().unwrap();
+        let target_file_path = to.join(entry_file_name);

        // If the entry is a dir and the recursive option is enabled, call itself
        if metadata.is_dir() && recursive {
-            if entry.path() == to.to_path_buf() {
+            if entry == to.as_os_str() {
                continue;
            }

            if let Some(avoid) = avoid_dir {
-                if entry.path() == *avoid {
+                if entry == *avoid {
                    continue;
                }
            }

            // check if output dir already exists
-            if !to.join(entry.file_name()).exists() {
-                fs::create_dir(&to.join(entry.file_name()))?;
+            if !target_file_path.exists() {
+                fs::create_dir(&target_file_path)?;
            }

-            copy_files_except_ext(
-                &from.join(entry.file_name()),
-                &to.join(entry.file_name()),
-                true,
-                avoid_dir,
-                ext_blacklist,
-            )?;
+            copy_files_except_ext(&entry, &target_file_path, true, avoid_dir, ext_blacklist)?;
        } else if metadata.is_file() {
            // Check if it is in the blacklist
-            if let Some(ext) = entry.path().extension() {
+            if let Some(ext) = entry.extension() {
                if ext_blacklist.contains(&ext.to_str().unwrap()) {
                    continue;
                }
            }
-            debug!(
-                "creating path for file: {:?}",
-                &to.join(
-                    entry
-                        .path()
-                        .file_name()
-                        .expect("a file should have a file name...")
-                )
-            );
-
-            debug!(
-                "Copying {:?} to {:?}",
-                entry.path(),
-                &to.join(
-                    entry
-                        .path()
-                        .file_name()
-                        .expect("a file should have a file name...")
-                )
-            );
-            copy(
-                entry.path(),
-                &to.join(
-                    entry
-                        .path()
-                        .file_name()
-                        .expect("a file should have a file name..."),
-                ),
-            )?;
+            debug!("Copying {entry:?} to {target_file_path:?}");
+            copy(&entry, &target_file_path)?;
        }
    }
    Ok(())
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -190,26 +190,30 @@ fn adjust_links<'a>(event: Event<'a>, path: Option<&Path>) -> Event<'a> {
 }

 /// Wrapper around the pulldown-cmark parser for rendering markdown to HTML.
-pub fn render_markdown(text: &str, curly_quotes: bool) -> String {
-    render_markdown_with_path(text, curly_quotes, None)
+pub fn render_markdown(text: &str, smart_punctuation: bool) -> String {
+    render_markdown_with_path(text, smart_punctuation, None)
 }

-pub fn new_cmark_parser(text: &str, curly_quotes: bool) -> Parser<'_> {
+pub fn new_cmark_parser(text: &str, smart_punctuation: bool) -> Parser<'_> {
    let mut opts = Options::empty();
    opts.insert(Options::ENABLE_TABLES);
    opts.insert(Options::ENABLE_FOOTNOTES);
    opts.insert(Options::ENABLE_STRIKETHROUGH);
    opts.insert(Options::ENABLE_TASKLISTS);
    opts.insert(Options::ENABLE_HEADING_ATTRIBUTES);
-    if curly_quotes {
+    if smart_punctuation {
        opts.insert(Options::ENABLE_SMART_PUNCTUATION);
    }
    Parser::new_ext(text, opts)
 }

-pub fn render_markdown_with_path(text: &str, curly_quotes: bool, path: Option<&Path>) -> String {
+pub fn render_markdown_with_path(
+    text: &str,
+    smart_punctuation: bool,
+    path: Option<&Path>,
+) -> String {
    let mut s = String::with_capacity(text.len() * 3 / 2);
-    let p = new_cmark_parser(text, curly_quotes);
+    let p = new_cmark_parser(text, smart_punctuation);
    let events = p
        .map(clean_codeblock_headers)
        .map(|event| adjust_links(event, path))
--- a/test_book/src/SUMMARY.md
+++ b/test_book/src/SUMMARY.md
@@ -22,6 +22,7 @@
  - [Tables](individual/table.md)
  - [Tasks](individual/task.md)
  - [Strikethrough](individual/strikethrough.md)
+  - [MathJax](individual/mathjax.md)
  - [Mixed](individual/mixed.md)
 - [Languages](languages/README.md)
  - [Syntax Highlight](languages/highlight.md)
--- a/test_book/src/individual/mathjax.md
+++ b/test_book/src/individual/mathjax.md
@@ -0,0 +1,42 @@
+# MathJax
+
+Fourier Transform
+
+\\[
+\begin{aligned}
+f(x) &= \int_{-\infty}^{\infty}F(s)(-1)^{ 2xs}ds \\\\
+F(s) &= \int_{-\infty}^{\infty}f(x)(-1)^{-2xs}dx
+\end{aligned}
+\\]
+
+The kernel can also be written as \\(e^{2i\pi xs}\\) which is more frequently used in literature.
+
+> Proof that \\(e^{ix} = \cos x + i\sin x\\) a.k.a Euler's Formula:
+>
+> \\(
+\begin{aligned}
+  e^x &= \sum_{n=0}^\infty \frac{x^n}{n!} \implies e^{ix} = \sum_{n=0}^\infty \frac{(ix)^n}{n!} \\\\
+  \cos x &= \sum_{m=0}^\infty \frac{(-1)^m x^{2m}}{(2m)!} = \sum_{m=0}^\infty \frac{(ix)^{2m}}{(2m)!} \\\\
+  \sin x &= \sum_{s=0}^\infty \frac{(-1)^s x^{2s+1}}{(2s+1)!} = \sum_{s=0}^\infty \frac{(ix)^{2s+1}}{i(2s+1)!} \\\\
+  \cos x + i\sin x &= \sum_{l=0}^\infty \frac{(ix)^{2l}}{(2l)!} + \sum_{s=0}^\infty \frac{(ix)^{2s+1}}{(2s+1)!} = \sum_{n=0}^\infty \frac{(ix)^{n}}{n!} \\\\
+         &= e^{ix}
+\end{aligned}
+\\)
+>
+
+
+Pauli Matrices
+
+\\[
+\begin{aligned}
+  \sigma_x &= \begin{pmatrix}
+  1 & 0 \\\\ 0 & 1
+  \end{pmatrix} \\\\
+  \sigma_y &= \begin{pmatrix}
+  0 & -i \\\\ i & 0
+  \end{pmatrix} \\\\
+  \sigma_z &= \begin{pmatrix}
+  1 & 0 \\\\ 0 & -1
+  \end{pmatrix}
+\end{aligned}
+\\]
--- a/test_book/src/languages/README.md
+++ b/test_book/src/languages/README.md
@@ -28,6 +28,7 @@ This Currently contains following languages
 - markdown
 - nginx
 - nim
+- nix
 - objectivec
 - perl
 - php
--- a/test_book/src/languages/highlight.md
+++ b/test_book/src/languages/highlight.md
@@ -563,6 +563,15 @@ int main(int argc, const char * argv[]) {
 "Hello " + world
 ```

+## perl
+
+```perl
+print "Hello World!\n";
+```
+
+## php
+
+```php
 <?php
 echo "Hello World!";
 ?>
Author	SHA1	Message	Date
Eric Huss	94b922d27a	Merge pull request #2389 from ehuss/bump-version Update to 0.4.40	2024-05-17 01:35:51 +00:00
Eric Huss	0a8f9a3f6b	Update to 0.4.40	2024-05-16 18:29:30 -07:00
Eric Huss	a5d4d1e0ad	Merge pull request #2386 from ehuss/revert-pulldown-cmark Revert update to pulldown-cmark 0.11	2024-05-17 01:19:17 +00:00
Eric Huss	2bdb5866a7	Add comment not to update pulldown-cmark.	2024-05-16 18:10:56 -07:00
Eric Huss	65932289f7	Revert "Merge pull request #2381 from ehuss/update-pulldown-cmark" This reverts commit `8884008b4d`, (https://github.com/rust-lang/mdBook/pull/2381) reversing changes made to `3d6caa504f`. The `pulldown_cmark` types are a public API, which I did not realize.	2024-05-16 18:08:09 -07:00
Eric Huss	e34f9c6408	Merge pull request #2385 from ehuss/bump-version Update to 0.4.39	2024-05-17 00:50:51 +00:00
Eric Huss	e0e13e375e	Merge pull request #2384 from ehuss/arg_watcher-dead-code Fix dead_code warning for arg_watcher	2024-05-17 00:44:51 +00:00
Eric Huss	4c333bee95	Update to 0.4.39	2024-05-16 17:44:03 -07:00
Eric Huss	965f7bde0d	Fix dead_code warning for arg_watcher	2024-05-16 17:38:52 -07:00
Eric Huss	cfcba01d03	Merge pull request #2383 from ehuss/musl-fix CI: Test more targets.	2024-05-17 00:36:14 +00:00
Eric Huss	3dc40f1742	Update actions/checkout to v4	2024-05-16 17:29:23 -07:00
Eric Huss	5a366f5707	Test more targets.	2024-05-16 17:27:28 -07:00
Eric Huss	b960c697dc	Merge pull request #2382 from ehuss/bump-version Update to 0.4.38	2024-05-16 22:09:16 +00:00
Eric Huss	0383b26f46	Update to 0.4.38	2024-05-16 15:02:56 -07:00
Eric Huss	8884008b4d	Merge pull request #2381 from ehuss/update-pulldown-cmark Update pulldown-cmark to 0.11	2024-05-16 21:40:10 +00:00
Eric Huss	af3012b0f2	Update pulldown-cmark to 0.11	2024-05-16 14:17:19 -07:00
Eric Huss	3d6caa504f	Merge pull request #2378 from ehuss/update-deps Update all dependencies	2024-05-14 18:42:30 +00:00
Eric Huss	87213edf39	Raise msrv to 1.74	2024-05-14 11:38:13 -07:00
Eric Huss	4f081bb5ce	Update all semver-compatible dependencies Updating aho-corasick v1.1.2 -> v1.1.3 Updating anstream v0.6.11 -> v0.6.14 Updating anstyle v1.0.6 -> v1.0.7 Updating anstyle-parse v0.2.3 -> v0.2.4 Updating anstyle-query v1.0.2 -> v1.0.3 Updating anstyle-wincon v3.0.2 -> v3.0.3 Updating anyhow v1.0.79 -> v1.0.83 Updating assert_cmd v2.0.13 -> v2.0.14 Updating autocfg v1.1.0 -> v1.3.0 Updating backtrace v0.3.69 -> v0.3.71 Updating bitflags v2.4.2 -> v2.5.0 Updating bstr v1.9.0 -> v1.9.1 Updating bumpalo v3.14.0 -> v3.16.0 Updating bytes v1.5.0 -> v1.6.0 Updating cc v1.0.83 -> v1.0.97 Updating chrono v0.4.33 -> v0.4.38 Updating clap v4.4.18 -> v4.5.4 Updating clap_builder v4.4.18 -> v4.5.2 Updating clap_complete v4.4.10 -> v4.5.2 Updating clap_lex v0.6.0 -> v0.7.0 Updating colorchoice v1.0.0 -> v1.0.1 Updating crossbeam-channel v0.5.11 -> v0.5.12 Updating data-encoding v2.5.0 -> v2.6.0 Updating env_logger v0.11.1 -> v0.11.3 Updating errno v0.3.8 -> v0.3.9 Updating fastrand v2.0.1 -> v2.1.0 Updating getrandom v0.2.12 -> v0.2.15 Updating handlebars v5.1.0 -> v5.1.2 Updating hashbrown v0.14.3 -> v0.14.5 Updating hermit-abi v0.3.5 -> v0.3.9 Removing http v0.2.11 Adding http v0.2.12 (latest: v1.1.0) Adding http v1.1.0 Updating indexmap v2.2.2 -> v2.2.6 Adding is_terminal_polyfill v1.70.0 Updating itoa v1.0.10 -> v1.0.11 Updating js-sys v0.3.67 -> v0.3.69 Updating libc v0.2.153 -> v0.2.154 Updating lock_api v0.4.11 -> v0.4.12 Updating log v0.4.20 -> v0.4.21 Updating memchr v2.7.1 -> v2.7.2 Updating new_debug_unreachable v1.0.4 -> v1.0.6 Updating normpath v1.1.1 -> v1.2.0 Updating num-traits v0.2.17 -> v0.2.19 Updating parking_lot v0.12.1 -> v0.12.2 Updating parking_lot_core v0.9.9 -> v0.9.10 Updating pest v2.7.7 -> v2.7.10 Updating pest_derive v2.7.7 -> v2.7.10 Updating pest_generator v2.7.7 -> v2.7.10 Updating pest_meta v2.7.7 -> v2.7.10 Updating pin-project v1.1.4 -> v1.1.5 Updating pin-project-internal v1.1.4 -> v1.1.5 Updating pin-project-lite v0.2.13 -> v0.2.14 Updating proc-macro2 v1.0.78 -> v1.0.82 Updating pulldown-cmark v0.10.0 -> v0.10.3 Updating pulldown-cmark-escape v0.10.0 -> v0.10.1 Updating quote v1.0.35 -> v1.0.36 Adding redox_syscall v0.5.1 Updating regex v1.10.3 -> v1.10.4 Updating regex-automata v0.4.5 -> v0.4.6 Updating regex-syntax v0.8.2 -> v0.8.3 Updating rustc-demangle v0.1.23 -> v0.1.24 Updating rustix v0.38.31 -> v0.38.34 Removing rustls-pemfile v1.0.4 Updating ryu v1.0.16 -> v1.0.18 Updating semver v1.0.21 -> v1.0.23 Updating serde v1.0.196 -> v1.0.201 Updating serde_derive v1.0.196 -> v1.0.201 Updating serde_json v1.0.113 -> v1.0.117 Updating smallvec v1.13.1 -> v1.13.2 Updating socket2 v0.5.5 -> v0.5.7 Updating strsim v0.10.0 -> v0.11.1 Updating syn v2.0.48 -> v2.0.63 Updating tempfile v3.10.0 -> v3.10.1 Updating thiserror v1.0.56 -> v1.0.60 Updating thiserror-impl v1.0.56 -> v1.0.60 Updating tokio v1.36.0 -> v1.37.0 Removing tokio-stream v0.1.14 Updating tokio-tungstenite v0.20.1 -> v0.21.0 Updating tokio-util v0.7.10 -> v0.7.11 Updating tungstenite v0.20.1 -> v0.21.0 Updating unicode-normalization v0.1.22 -> v0.1.23 Updating walkdir v2.4.0 -> v2.5.0 Updating warp v0.3.6 -> v0.3.7 Updating wasm-bindgen v0.2.90 -> v0.2.92 Updating wasm-bindgen-backend v0.2.90 -> v0.2.92 Updating wasm-bindgen-macro v0.2.90 -> v0.2.92 Updating wasm-bindgen-macro-support v0.2.90 -> v0.2.92 Updating wasm-bindgen-shared v0.2.90 -> v0.2.92 Updating winapi-util v0.1.6 -> v0.1.8 Updating windows-targets v0.52.0 -> v0.52.5 Updating windows_aarch64_gnullvm v0.52.0 -> v0.52.5 Updating windows_aarch64_msvc v0.52.0 -> v0.52.5 Updating windows_i686_gnu v0.52.0 -> v0.52.5 Adding windows_i686_gnullvm v0.52.5 Updating windows_i686_msvc v0.52.0 -> v0.52.5 Updating windows_x86_64_gnu v0.52.0 -> v0.52.5 Updating windows_x86_64_gnullvm v0.52.0 -> v0.52.5 Updating windows_x86_64_msvc v0.52.0 -> v0.52.5	2024-05-14 11:24:04 -07:00
Eric Huss	78d356d2ed	Update opener from 0.6.1 to 0.7.0	2024-05-14 11:22:41 -07:00
Eric Huss	64dc7f41d8	Update ammonia from 3.3.0 to 4.0.0	2024-05-14 11:21:52 -07:00
Eric Huss	cb0a992d8d	Merge pull request #2364 from expikr/patch-3 Fix dividers being folded by sections	2024-05-14 16:04:42 +00:00
expikr	c2eb375f69	Fix spacers in summary with folding. The spacer was incorrectly being included in the previous fold.	2024-05-13 14:10:42 -07:00
Eric Huss	a555c6b6b2	Merge pull request #2325 from ehuss/poll-watcher Add a poll-based file watcher.	2024-05-13 20:54:36 +00:00
Eric Huss	0752fa4e43	Fix `--watcher` markdown header.	2024-05-13 13:51:04 -07:00
Eric Huss	f14fc61b4b	Merge pull request #2377 from ehuss/guide-smart-punctuation docs: Switch the guide to use smart punctuation.	2024-05-13 20:49:33 +00:00
Eric Huss	89878519b4	docs: Switch the guide to use smart punctuation.	2024-05-13 13:43:04 -07:00
Eric Huss	46d57bcf3c	Add some more context on why `--watcher=native` may not be desirable.	2024-05-13 13:18:50 -07:00
Eric Huss	f3e85da9a7	Add a poll-based file watcher.	2024-05-13 13:14:22 -07:00
Eric Huss	83444650a3	Merge pull request #2376 from ehuss/clippy-fixes Apply a few minor clippy fixes	2024-05-13 19:18:52 +00:00
Eric Huss	dae7490739	Merge pull request #2375 from ehuss/clippy-well-known Remove cargo-clippy unknown feature	2024-05-13 19:14:01 +00:00
Eric Huss	5bc87d5c17	Apply a few minor clippy fixes	2024-05-13 12:13:50 -07:00
Eric Huss	7a58c415de	Remove cargo-clippy unknown feature	2024-05-13 12:07:49 -07:00
Eric Huss	09576d7d57	Merge pull request #2260 from KFearsoff/remove-css-double-import fix: remove double imports of css	2024-05-13 18:41:09 +00:00
Eric Huss	0bfcd3c9ce	Merge pull request #2374 from rust-lang/revert-2373-patch-1 Revert "Maybe a typo in preprocessors.md"	2024-05-13 15:42:33 +00:00
Dylan DPC	bf3de7a80d	Revert "Maybe a typo in preprocessors.md"	2024-05-13 20:31:18 +05:30
Dylan DPC	7269c372d6	Merge pull request #2373 from TGITS/patch-1 Maybe a typo in preprocessors.md	2024-05-13 13:07:00 +00:00
TheGeekInTheShell	8308f15e93	Maybe a typo in preprocessors.md It seems to me there is a small typo in the file preprocessors.md	2024-05-12 14:35:21 +02:00
Eric Huss	2420919ca8	Merge pull request #2259 from stevecheckoway/improve-test-output Color test output and shorten chapter paths	2024-05-10 18:14:32 +00:00
Eric Huss	c671c2e904	Merge pull request #2262 from Janik-Haag/master Add nix to default languages	2024-04-12 15:27:31 +00:00
Janik H.	c9df8dd1f3	Add nix to default languages	2024-04-10 21:56:13 +02:00
Eric Huss	8ae86d4310	Merge pull request #2355 from johamster/reduce_allocations_when_copying_files Reduce allocations in `fs::copy_files_except_ext`	2024-04-08 21:40:54 +00:00
Johannes Gloeckle	c144c26dcf	Reduce allocations in `fs::copy_files_except_ext` Above mentioned function copies files (recursively) from a source to a destination directory. For that, file/directory paths have to be created repeatedly. This allocates as directory and file names are concatenated into an owning path structure. The number of allocations can be reduced by creating file/directory paths only once and borrowing them instead of cloning/recreating them. In bigger projects, this reduces execution time noticeably. Please note that file system operations are dominant from performance POV.	2024-04-07 10:43:23 +02:00
Eric Huss	481f6b1531	Merge pull request #2351 from rust-lang/dependabot/cargo/mio-0.8.11 Bump mio from 0.8.10 to 0.8.11	2024-04-05 19:36:55 +00:00
dependabot[bot]	b267d56ba7	Bump mio from 0.8.10 to 0.8.11 Bumps [mio](https://github.com/tokio-rs/mio) from 0.8.10 to 0.8.11. - [Release notes](https://github.com/tokio-rs/mio/releases) - [Changelog](https://github.com/tokio-rs/mio/blob/master/CHANGELOG.md) - [Commits](https://github.com/tokio-rs/mio/compare/v0.8.10...v0.8.11) --- updated-dependencies: - dependency-name: mio dependency-type: indirect ... Signed-off-by: dependabot[bot] <support@github.com>	2024-04-05 18:10:01 +00:00
Eric Huss	dd139f8228	Merge pull request #2350 from rust-lang/dependabot/cargo/h2-0.3.26 Bump h2 from 0.3.24 to 0.3.26	2024-04-05 18:04:09 +00:00
dependabot[bot]	be4756e4bf	Bump h2 from 0.3.24 to 0.3.26 Bumps [h2](https://github.com/hyperium/h2) from 0.3.24 to 0.3.26. - [Release notes](https://github.com/hyperium/h2/releases) - [Changelog](https://github.com/hyperium/h2/blob/v0.3.26/CHANGELOG.md) - [Commits](https://github.com/hyperium/h2/compare/v0.3.24...v0.3.26) --- updated-dependencies: - dependency-name: h2 dependency-type: indirect ... Signed-off-by: dependabot[bot] <support@github.com>	2024-04-05 16:16:31 +00:00
Eric Huss	bd323fb930	Merge pull request #2339 from goodmost/master chore: remove repetitive word	2024-03-19 15:46:26 +00:00
goodmost	aff1070f43	chore: remove repetitive word Signed-off-by: goodmost <zhaohaiyang@outlook.com>	2024-03-19 22:22:16 +08:00
Eric Huss	b6742e90b1	Merge pull request #2338 from max-heller/patch-2 Fix typo in docs	2024-03-18 22:59:48 +00:00
Max Heller	95b6ed7965	Fix typo in docs	2024-03-18 18:38:55 -04:00
Eric Huss	5a35144d4f	Merge pull request #2328 from ehuss/clarify-src-path Clarify Chapter path and source_path.	2024-02-25 23:26:20 +00:00
Eric Huss	5f5f9d6fd5	Clarify Chapter path and source_path.	2024-02-25 15:20:19 -08:00
Eric Huss	c602a2fcd6	Merge pull request #2070 from expikr/testbook-add-mathajx-tests Added missing tests for MathJax to the test book	2024-02-25 23:00:13 +00:00
_	821d3c423c	Add MathJax tests.	2024-02-25 14:53:10 -08:00
Eric Huss	6b89f5dad8	Merge pull request #2327 from ehuss/smart-punctuation Rename curly-quotes to smart-punctuation.	2024-02-25 22:30:25 +00:00
Eric Huss	d28cf53009	Rename curly-quotes to smart-punctuation.	2024-02-25 13:42:44 -08:00
Eric Huss	504900d7bd	Merge pull request #2324 from ehuss/redundant-imports Fix redundant imports.	2024-02-24 20:19:28 +00:00
Eric Huss	0cc439eee3	Fix redundant imports.	2024-02-24 12:04:57 -08:00
Eric Huss	e8b8f34f2b	Merge pull request #2322 from wilwade/patch-1 Fix incorrect theme documentation: Next/Previous should use `title`	2024-02-21 21:25:18 +00:00
Wil Wade	58a23e06a1	Fix incorrect theme documentation The theme documentation for next and previous used name instead of title	2024-02-20 15:29:30 -05:00
KFears	4b6813ecee	fix: remove double imports of css	2023-12-06 22:15:24 +04:00
Stephen Checkoway	32687e64fe	Color test output and shorten chapter paths Currently, the output from `rustdoc --test` is not colored because `rustdoc`'s stdout is not a tty. The output of a failed `rustdoc` run is sent to `mdbook`'s stderr via the `error!()` macro. This commit checks if stderr is a tty using the standard `.is_terminal()` and if so, passes `--color always` to `rustdoc`. The test output from `rustdoc` includes the full path that `rustdoc` was called with. This obscures the path of the file with the error. E.g., ``` ---- /var/folders/9v/90bm7kb10fx3_bprxltb3t1r0000gn/T/mdbook-tnGJxp/lab0/index.md - Lab_0__Getting_Started (line 3) stdout ---- error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found `code` --> /var/folders/9v/90bm7kb10fx3_bprxltb3t1r0000gn/T/mdbook-tnGJxp/lab0/index.md:4:6 \| 3 \| this code has a bug \| ^^^^ expected one of 8 possible tokens error: aborting due to previous error ``` This commit runs `rustdoc` in the temp directory and replaces any relative library paths with absolute library paths. This leads to simpler error messages. The one above becomes ``` ---- lab0/index.md - Lab_0__Getting_Started (line 3) stdout ---- error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found `code` --> lab0/index.md:4:6 \| 3 \| this code has a bug \| ^^^^ expected one of 8 possible tokens error: aborting due to previous error ``` (with colors, of course).	2023-12-06 12:09:07 -05:00