mdBook/CHANGELOG.md

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# Changelog
## mdBook 0.4.0
[99ecd4f...d4df7e7](https://github.com/rust-lang/mdBook/compare/99ecd4f...d4df7e7)
### Breaking Changes
- Several of the changes in the release have altered the public API of the
mdbook library.
- Many dependencies have been updated or replaced.
This also removes the `--websocket-hostname` and `--websocket-port` from
the `serve` command.
[#1211](https://github.com/rust-lang/mdBook/pull/1211)
- A new "404" page is now automatically rendered. This requires knowledge of
the base URL of your site to work properly. If you decide to use this as
your 404 page, you should set the `site-url` setting in the book
configuration so mdbook can generate the links correctly. Alternatively you
can disable the 404 page generation, or set up your own 404 handling in your
web server.
[#1221](https://github.com/rust-lang/mdBook/pull/1221)
- If you are using customized themes, you may want to consider setting the
`preferred-dark-theme` config setting, as it now defaults to "navy".
[#1199](https://github.com/rust-lang/mdBook/pull/1199)
- "Playpen" has been renamed to "playground". This is generally backwards
compatible for users, but `{{#playpen}}` will now display warnings. This may
impact books that have modified the "playpen" elements in the theme.
[#1241](https://github.com/rust-lang/mdBook/pull/1241)
- If a renderer is not installed, it is now treated as an error. If you want
the old behavior of ignoring missing renderers, set the `optional` setting
for that renderer.
[#1122](https://github.com/rust-lang/mdBook/pull/1122)
- If you have a custom favicon, you may need to look into adding an SVG
version, otherwise the default SVG icon will be displayed.
[#1230](https://github.com/rust-lang/mdBook/pull/1230)
### Added
- Added a new `[rust]` configuration section to `book.toml`, which allows
setting the default edition with `edition = "2018"`.
[#1163](https://github.com/rust-lang/mdBook/pull/1163)
- Renderers can now be marked as `optional`, so that they will be ignored if
the renderer is not installed.
[#1122](https://github.com/rust-lang/mdBook/pull/1122)
- Added `head.hbs` to allow adding content to the `<head>` section in HTML.
[#1206](https://github.com/rust-lang/mdBook/pull/1206)
- Added "draft chapters". These are chapters listed without a link to indicate
content yet to be written.
[#1153](https://github.com/rust-lang/mdBook/pull/1153)
- Added "parts" to split a book into different sections. Headers can be added
to `SUMMARY.md` to signify different sections.
[#1171](https://github.com/rust-lang/mdBook/pull/1171)
- Added generation of a "404" page for handling missing pages and broken links.
[#1221](https://github.com/rust-lang/mdBook/pull/1221)
- Added configuration section for specifying URL redirects.
[#1237](https://github.com/rust-lang/mdBook/pull/1237)
- Added an SVG favicon that works with light and dark colors schemes.
[#1230](https://github.com/rust-lang/mdBook/pull/1230)
### Changed
- Changed default Rust attribute of `allow(unused_variables)` to `allow(unused)`.
[#1195](https://github.com/rust-lang/mdBook/pull/1195)
- Fonts are now served locally instead of from the Google Fonts CDN. The
`copy-fonts` option was added to disable this if you want to supply your own
fonts.
[#1188](https://github.com/rust-lang/mdBook/pull/1188)
- Switched the built-in webserver for the `serve` command to a new
implementation. This results in some internal differences in how websockets
are handled, which removes the separate websocket options. This should also
make it easier to serve multiple books at once.
[#1211](https://github.com/rust-lang/mdBook/pull/1211)
- The default dark theme is now "navy".
[#1199](https://github.com/rust-lang/mdBook/pull/1199)
- "Playpen" has been renamed to "playground", matching the actual name of the
service which was renamed many years ago.
[#1241](https://github.com/rust-lang/mdBook/pull/1241)
### Fixed
- Links with the `+` symbol should now work.
[#1208](https://github.com/rust-lang/mdBook/pull/1208)
- The `MDBOOK_BOOK` environment variable now correctly allows overriding the
entire book configuration.
[#1207](https://github.com/rust-lang/mdBook/pull/1207)
- The sidebar can no longer be dragged outside of the window.
[#1229](https://github.com/rust-lang/mdBook/pull/1229)
- Hide the Rust Playground "play" button for `no_run` code samples.
[#1249](https://github.com/rust-lang/mdBook/pull/1249)
- Fixed the `--dest-dir` command-line option for the `serve` and `watch`
commands.
[#1228](https://github.com/rust-lang/mdBook/pull/1228)
- Hotkey handlers are now disabled in `text` input fields (for example, typing
`S` in a custom text input field).
[#1244](https://github.com/rust-lang/mdBook/pull/1244)
## mdBook 0.3.7
[88684d8...99ecd4f](https://github.com/rust-lang/mdBook/compare/88684d8...99ecd4f)
### Changed
- Code spans in headers are no longer highlighted as code.
[#1162](https://github.com/rust-lang/mdBook/pull/1162)
- The sidebar will now scroll the activate page to the middle instead of the top.
[#1161](https://github.com/rust-lang/mdBook/pull/1161)
- Reverted change to reject build output within the `src` directory, and
instead add a check that prevents infinite copies.
[#1181](https://github.com/rust-lang/mdBook/pull/1181)
[#1026](https://github.com/rust-lang/mdBook/pull/1026)
### Fixed
- Fixed sidebar line-height jumping for collapsed chapters.
[#1182](https://github.com/rust-lang/mdBook/pull/1182)
- Fixed theme selector focus.
[#1170](https://github.com/rust-lang/mdBook/pull/1170)
## mdBook 0.3.6
[efdb832...88684d8](https://github.com/rust-lang/mdBook/compare/efdb832...88684d8)
### Added
- `MDBook::execute_build_process` is now publicly accessible in the API so
that plugins can more easily initiate the build process.
[#1099](https://github.com/rust-lang/mdBook/pull/1099)
### Changed
- Use a different color for Ayu theme's highlighting for Rust attributes (uses
a bright color instead of the comment color).
[#1133](https://github.com/rust-lang/mdBook/pull/1133)
- Adjusted spacing of sidebar entries.
[#1137](https://github.com/rust-lang/mdBook/pull/1137)
- Slightly adjusted line-height of `<p>`, `<ul>`, and `<ol>`.
[#1136](https://github.com/rust-lang/mdBook/pull/1136)
- Handlebars updated to 3.0.
[#1130](https://github.com/rust-lang/mdBook/pull/1130)
### Fixed
- Fix an issue with sidebar scroll position on reload.
[#1108](https://github.com/rust-lang/mdBook/pull/1108)
- `mdbook serve` will retain the current scroll position when the page is reloaded.
[#1097](https://github.com/rust-lang/mdBook/pull/1097)
- Fixed the page name if the book didn't have a title to not be prefixed with ` - `.
[#1145](https://github.com/rust-lang/mdBook/pull/1145)
- HTML attributes `rel=next` and `rel=previous` are now supported in "wide"
mode (previously they were only set in narrow mode).
[#1150](https://github.com/rust-lang/mdBook/pull/1150)
- Prevent recursive copies when the destination directory is contained in the
source directory.
[#1135](https://github.com/rust-lang/mdBook/pull/1135)
- Adjusted the menu bar animation to not immediately obscure the top content.
[#989](https://github.com/rust-lang/mdBook/pull/989)
- Fix for comments in SUMMARY.md that appear between items.
[#1167](https://github.com/rust-lang/mdBook/pull/1167)
## mdBook 0.3.5
[6e0d0fa...efdb832](https://github.com/rust-lang/mdBook/compare/6e0d0fa...efdb832)
### Changed
- The `default-theme` config setting is now case-insensitive.
[#1079](https://github.com/rust-lang/mdBook/pull/1079)
### Fixed
- Fixed `#` hidden Rust code lines not rendering properly.
[#1088](https://github.com/rust-lang/mdBook/pull/1088)
- Updated pulldown-cmark to 0.6.1, fixing several issues.
[#1021](https://github.com/rust-lang/mdBook/pull/1021)
## mdBook 0.3.4
[e5f77aa...6e0d0fa](https://github.com/rust-lang/mdBook/compare/e5f77aa...6e0d0fa)
### Changed
- Switch to relative `rem` font sizes from `px`.
[#894](https://github.com/rust-lang/mdBook/pull/894)
- Migrated repository to https://github.com/rust-lang/mdBook/
[#1083](https://github.com/rust-lang/mdBook/pull/1083)
## mdBook 0.3.3
[2b649fe...e5f77aa](https://github.com/rust-lang/mdBook/compare/2b649fe...e5f77aa)
### Changed
- Improvements to the automatic dark theme selection.
[#1069](https://github.com/rust-lang/mdBook/pull/1069)
- Fragment links now prevent scrolling the header behind the menu bar.
[#1077](https://github.com/rust-lang/mdBook/pull/1077)
### Fixed
- Fixed error when building a book that has a spacer immediately after the
first chapter.
[#1075](https://github.com/rust-lang/mdBook/pull/1075)
## mdBook 0.3.2
[9cd47eb...2b649fe](https://github.com/rust-lang/mdBook/compare/9cd47eb...2b649fe)
### Added
- Added a markdown renderer, which is off by default. This may be useful for
debugging preprocessors.
[#1018](https://github.com/rust-lang/mdBook/pull/1018)
- Code samples may now include line numbers with the
`output.html.playpen.line-numbers` configuration value.
[#1035](https://github.com/rust-lang/mdBook/pull/1035)
- The `watch` and `serve` commands will now ignore files listed in
`.gitignore`.
[#1044](https://github.com/rust-lang/mdBook/pull/1044)
- Added automatic dark-theme detection based on the CSS `prefers-color-scheme`
feature. This may be enabled by setting `output.html.preferred-dark-theme`
to your preferred dark theme.
[#1037](https://github.com/rust-lang/mdBook/pull/1037)
- Added `rustdoc_include` preprocessor. This makes it easier to include
portions of an external Rust source file. The rest of the file is hidden,
but the user may expand it to see the entire file, and will continue to work
with `mdbook test`.
[#1003](https://github.com/rust-lang/mdBook/pull/1003)
- Added Ctrl-Enter shortcut to the playpen editor to automatically run the
sample.
[#1066](https://github.com/rust-lang/mdBook/pull/1066)
- Added `output.html.playpen.copyable` configuration option to disable
the copy button.
[#1050](https://github.com/rust-lang/mdBook/pull/1050)
- Added ability to dynamically expand and fold sections within the sidebar.
See the `output.html.fold` configuration to enable this feature.
[#1027](https://github.com/rust-lang/mdBook/pull/1027)
### Changed
- Use standard `scrollbar-color` CSS along with webkit extension
[#816](https://github.com/rust-lang/mdBook/pull/816)
- The renderer build directory is no longer deleted before the renderer is
run. This allows a backend to cache results between runs.
[#985](https://github.com/rust-lang/mdBook/pull/985)
- Next/prev links now highlight on hover to indicate it is clickable.
[#994](https://github.com/rust-lang/mdBook/pull/994)
- Increase padding of table headers.
[#824](https://github.com/rust-lang/mdBook/pull/824)
- Errors in `[output.html]` config are no longer ignored.
[#1033](https://github.com/rust-lang/mdBook/pull/1033)
- Updated highlight.js for syntax highlighting updates (primarily to add
async/await to Rust highlighting).
[#1041](https://github.com/rust-lang/mdBook/pull/1041)
- Raised minimum supported rust version to 1.35.
[#1003](https://github.com/rust-lang/mdBook/pull/1003)
- Hidden code lines are no longer dynamically removed via JavaScript, but
instead managed with CSS.
[#846](https://github.com/rust-lang/mdBook/pull/846)
[#1065](https://github.com/rust-lang/mdBook/pull/1065)
- Changed the default font set for the ACE editor, giving preference to
"Source Code Pro".
[#1062](https://github.com/rust-lang/mdBook/pull/1062)
- Windows 32-bit releases are no longer published.
[#1071](https://github.com/rust-lang/mdBook/pull/1071)
### Fixed
- Fixed sidebar auto-scrolling.
[#1052](https://github.com/rust-lang/mdBook/pull/1052)
- Fixed error message when running `clean` multiple times.
[#1055](https://github.com/rust-lang/mdBook/pull/1055)
- Actually fix the "next" link on index.html. The previous fix didn't work.
[#1005](https://github.com/rust-lang/mdBook/pull/1005)
- Stop using `inline-block` for `inline code`, fixing selection highlighting
and some rendering issues.
[#1058](https://github.com/rust-lang/mdBook/pull/1058)
- Fix header auto-hide on browsers with momentum scrolling that allows
negative `scrollTop`.
[#1070](https://github.com/rust-lang/mdBook/pull/1070)
## mdBook 0.3.1
[69a08ef...9cd47eb](https://github.com/rust-lang/mdBook/compare/69a08ef...9cd47eb)
### Added
- 🔥 Added ability to include files using anchor points instead of line numbers.
[#851](https://github.com/rust-lang/mdBook/pull/851)
- Added `language` configuration value to set the language of the book, which
will affect things like the `<html lang="en">` tag.
[#941](https://github.com/rust-lang/mdBook/pull/941)
### Changed
- Updated to handlebars 2.0.
[#977](https://github.com/rust-lang/mdBook/pull/977)
### Fixed
- Fixed memory leak warning.
[#967](https://github.com/rust-lang/mdBook/pull/967)
- Fix more print.html links.
[#963](https://github.com/rust-lang/mdBook/pull/963)
- Fixed crash on some unicode input.
[#978](https://github.com/rust-lang/mdBook/pull/978)
## mdBook 0.3.0
[6cbc41d...69a08ef](https://github.com/rust-lang/mdBook/compare/6cbc41d...69a08ef)
### Added
- Added ability to resize the sidebar.
[#849](https://github.com/rust-lang/mdBook/pull/849)
- Added `load_with_config_and_summary` function to `MDBook` to be able to
build a book with a custom `Summary`.
[#883](https://github.com/rust-lang/mdBook/pull/883)
- Set `noindex` on `print.html` page to prevent robots from indexing it.
[#844](https://github.com/rust-lang/mdBook/pull/844)
- Added support for ~~strikethrough~~ and GitHub-style tasklists.
[#952](https://github.com/rust-lang/mdBook/pull/952)
### Changed
- Command-line help output is now colored.
[#861](https://github.com/rust-lang/mdBook/pull/861)
- The build directory is now deleted before rendering starts, instead of after
if finishes.
[#878](https://github.com/rust-lang/mdBook/pull/878)
- Removed dependency on `same-file` crate.
[#903](https://github.com/rust-lang/mdBook/pull/903)
- 💥 Renamed `with_preprecessor` to `with_preprocessor`.
[#906](https://github.com/rust-lang/mdBook/pull/906)
- Updated ACE editor to 1.4.4, should remove a JavaScript console warning.
[#935](https://github.com/rust-lang/mdBook/pull/935)
- Dependencies have been updated.
[#934](https://github.com/rust-lang/mdBook/pull/934)
[#945](https://github.com/rust-lang/mdBook/pull/945)
- Highlight.js has been updated. This fixes some TOML highlighting, and adds
Julia support.
[#942](https://github.com/rust-lang/mdBook/pull/942)
- 🔥 Updated to pulldown-cmark 0.5. This may have significant changes to the
formatting of existing books, as the newer version has more accurate
interpretation of the CommonMark spec and a large number of bug fixes and
changes.
[#898](https://github.com/rust-lang/mdBook/pull/898)
- The `diff` language should now highlight correctly.
[#943](https://github.com/rust-lang/mdBook/pull/943)
- Make the blank region of a header not clickable.
[#948](https://github.com/rust-lang/mdBook/pull/948)
- Rustdoc tests now use the preprocessed content instead of the raw,
unpreprocessed content.
[#891](https://github.com/rust-lang/mdBook/pull/891)
### Fixed
- Fixed file change detection so that `mdbook serve` only reloads once when
multiple files are changed at once.
[#870](https://github.com/rust-lang/mdBook/pull/870)
- Fixed on-hover color highlighting for links in sidebar.
[#834](https://github.com/rust-lang/mdBook/pull/834)
- Fixed loss of focus when clicking the "Copy" button in code blocks.
[#867](https://github.com/rust-lang/mdBook/pull/867)
- Fixed incorrectly stripping the path for `additional-js` files.
[#796](https://github.com/rust-lang/mdBook/pull/796)
- Fixed color of `code spans` that are links.
[#905](https://github.com/rust-lang/mdBook/pull/905)
- Fixed "next" navigation on index.html.
[#916](https://github.com/rust-lang/mdBook/pull/916)
- Fixed keyboard chapter navigation for `file` urls.
[#915](https://github.com/rust-lang/mdBook/pull/915)
- Fixed bad wrapping for inline code on some browsers.
[#818](https://github.com/rust-lang/mdBook/pull/818)
- Properly load an existing `SUMMARY.md` in `mdbook init`.
[#841](https://github.com/rust-lang/mdBook/pull/841)
- Fixed some broken links in `print.html`.
[#871](https://github.com/rust-lang/mdBook/pull/871)
- The Rust Playground link now supports the 2018 edition.
[#946](https://github.com/rust-lang/mdBook/pull/946)
## mdBook 0.2.3 (2018-01-18)
[2c20c99...6cbc41d](https://github.com/rust-lang/mdBook/compare/2c20c99...6cbc41d)
### Added
- Added an optional button to the top of the page which will link to a git
repository. Use the `git-repository-url` and `git-repository-icon` options
in the `[output.html]` section to enable it and set its appearance.
[#802](https://github.com/rust-lang/mdBook/pull/802)
- Added a `default-theme` option to the `[output.html]` section.
[#804](https://github.com/rust-lang/mdBook/pull/804)
### Changed
- 💥 Header ID anchors no longer add an arbitrary `a` character for headers
that start with a non-ascii-alphabetic character.
[#788](https://github.com/rust-lang/mdBook/pull/788)
### Fixed
- Fix websocket hostname usage
[#865](https://github.com/rust-lang/mdBook/pull/865)
- Fixing links in print.html
[#866](https://github.com/rust-lang/mdBook/pull/866)
## mdBook 0.2.2 (2018-10-19)
[7e2e095...2c20c99](https://github.com/rust-lang/mdBook/compare/7e2e095...2c20c99)
### Added
- 🎉 Process-based custom preprocessors. See [the
docs](https://rust-lang.github.io/mdBook/for_developers/preprocessors.html)
for more.
[#792](https://github.com/rust-lang/mdBook/pull/792)
- 🎉 Configurable preprocessors.
Added `build.use-default-preprocessors` boolean TOML key to allow disabling
the built-in `links` and `index` preprocessors.
Added `[preprocessor]` TOML tables to configure each preprocessor.
Specifying `[preprocessor.links]` or `[preprocessor.index]` will enable the
respective built-in preprocessor if `build.use-default-preprocessors` is
`false`.
Added `fn supports_renderer(&self, renderer: &str) -> bool` to the
`Preprocessor` trait to specify if the preprocessor supports the given
renderer. The default implementation always returns `true`.
`Preprocessor::run` now takes a book by value instead of a mutable
reference. It should return a `Book` value with the intended modifications.
Added `PreprocessorContext::renderer` to indicate the renderer being used.
[#658](https://github.com/rust-lang/mdBook/pull/658)
[#787](https://github.com/rust-lang/mdBook/pull/787)
### Fixed
- Fix paths to additional CSS and JavaScript files
[#777](https://github.com/rust-lang/mdBook/pull/777)
- Ensure section numbers are correctly incremented after a horizontal
separator
[#790](https://github.com/rust-lang/mdBook/pull/790)
## mdBook 0.2.1 (2018-08-22)
[91ffca1...7e2e095](https://github.com/rust-lang/mdBook/compare/91ffca1...7e2e095)
### Changed
- Update to handlebars-rs 1.0
[#761](https://github.com/rust-lang/mdBook/pull/761)
### Fixed
- Fix table colors, broken by Stylus -> CSS transition
[#765](https://github.com/rust-lang/mdBook/pull/765)
## mdBook 0.2.0 (2018-08-02)
### Changed
- 💥 This release changes how links are handled in mdBook. Previously, relative
links were interpreted relative to the book's root. In `0.2.0`+ links are
relative to the page they are in, and use the `.md` extension. This has [several
advantages](https://github.com/rust-lang/mdBook/pull/603#issue-166701447),
such as making links work in other markdown viewers like GitHub. You will
likely have to change links in your book to accommodate this change. For
example, a book with this layout:
```
chapter_1/
section_1.md
section_2.md
SUMMARY.md
```
Previously a link in `section_1.md` to `section_2.md` would look like this:
```markdown
[section_2](chapter_1/section_2.html)
```
Now it must be changed to this:
```markdown
[section_2](section_2.md)
```
- 💥 `mdbook test --library-path` now accepts a comma-delimited list of
arguments rather than taking all following arguments. This makes it easier
to handle the trailing book directory argument without always needing to put
` -- ` before it. Multiple instances of the option continue to be accepted:
`mdbook test -L foo -L bar`.
- 💥 `mdbook serve` has some of its options renamed for clarity. See `mdbook
help serve` for details.
- Embedded rust playpens now use the "stable" playground API.
[#754](https://github.com/rust-lang/mdBook/pull/754)
### Fixed
- Escaped includes (`\{{#include file.rs}}`) will now render correctly.
[f30ce01](https://github.com/rust-lang/mdBook/commit/f30ce0184d71e342141145472bf816419d30a2c5)
- `index.html` will now render correctly when the book's first section is
inside a subdirectory.
[#756](https://github.com/rust-lang/mdBook/pull/756)