## Unreleased

## 4.1.0

- [Fix missing manifest.json from govuk-frontend](https://github.com/alphagov/tech-docs-gem/pull/376)
- [Stable soft for left navigation](https://github.com/alphagov/tech-docs-gem/pull/374)

## 4.0.0

### Breaking
- BREAKING: drop support for end-of-life Ruby versions 2.7 and 3.0. The minimum Ruby version is now 3.1.
- BREAKING: drop support for IE8
- Upgrade to govuk-frontend v5.7.1 and introduce new Javascript entry point

To upgrade you need to:
  - create a `govuk_frontend.js` file your project’s `source/assets/javascripts` directory
  - add `//= require govuk_frontend_all` into it

### Fixes

- Update gem dependencies.
- Declare some missing indirect dependencies to prepare for Ruby 3.4. This also resolves some warnings about this at build time.
- Remove aria-hidden from search label to let assistive technologies see its accessible name
- Use hidden attribute to show/hide expiry notices instead of just CSS
- Only use dialog role for table of contents when it behaves like one (accessibility fix)
- Prevent interactive elements being obscured by sticky table of contents header
- Only wrap images with alt text in hyperlinks

## 3.5.0

### New features

- Update the Crown logo and govuk-frontend

  See [pull request #344: Upgrade govuk-frontend and the crown logo](https://github.com/alphagov/tech-docs-gem/pull/344) for more details.

https://github.com/alphagov/tech-docs-gem/pull/344

## 3.4.0

### New features

- Footer and header links now work with relative links. Thanks to [@eddgrant](https://github.com/eddgrant) for contributing this feature.

  See [pull request #325: Support sites deployed on a path other than "/" when generating header and footer links](https://github.com/alphagov/tech-docs-gem/pull/325) for more details.

### Fixes

- You no longer need to downgrade Haml yourself, `bundle install` will now make sure Haml 6 is not installed (see issue [#318: Error: Filters is not a module](https://github.com/alphagov/tech-docs/gem/issues/318)).

## 3.3.1

This change solves a potential security issue with HTML snippets. Pages indexed in search results have their entire contents indexed, including any HTML code snippets. These HTML snippets would appear in the search results unsanitised, making it possible to render arbitrary HTML or run arbitrary scripts.

You can see more detail about this issue at [#323: Fix XSS vulnerability on search results page](https://github.com/alphagov/tech-docs-gem/pull/323)

## 3.3.0

### New features

There are some steps you should follow as the Technical Documentation Template (TDT) now uses GOV.UK Frontend 4.4.1.

1. Update your documentation site to use the latest template version. You can [follow the TDT guidance on using the latest template version](https://tdt-documentation.london.cloudapps.digital/maintain_project/use_latest_template/).
2. Check your documentation site displays correctly. If your site does not display correctly, you can refer to the [GOV.UK Frontend release notes](https://github.com/alphagov/govuk-frontend/releases/) for more information, or [contact the GOV.UK Design System team](https://design-system.service.gov.uk/get-in-touch/).

### Fixes

- [#242: Make scrollable area keyboard (and voice) focusable](https://github.com/alphagov/tech-docs-gem/pull/242) (thanks [@colinbm](https://github.com/colinbm))

## 3.2.1

### Fixes

- [#296: Fix Nokogiri Node.new deprecation warnings](https://github.com/alphagov/tech-docs-gem/pull/296) (thanks [@timja](https://github.com/timja))

## 3.2.0

### New features

You can now [configure your Tech Docs Template (TDT) to build your documentation site to use relative links to pages and assets](https://tdt-documentation.london.cloudapps.digital/configure_project/global_configuration/#build-your-site-using-relative-links).

Thanks [@eddgrant](https://github.com/eddgrant) for contributing this feature and the associated fixes.

This change was introduced in [pull request #291: Support sites deployed on paths other than "/" (by generating relative links)](https://github.com/alphagov/tech-docs-gem/pull/291). 

## 3.1.0

### New features

There are some steps you should follow as the Technical Documentation Template (TDT) now uses GOV.UK Frontend 4.0.0. 

1. Update your documentation site to use the latest template version. You can [follow the TDT guidance on using the latest template version](https://tdt-documentation.london.cloudapps.digital/maintain_project/use_latest_template/).
2. Check your documentation site displays correctly. If your site does not display correctly, you can refer to the [GOV.UK Frontend 4.0.0 release note](https://github.com/alphagov/govuk-frontend/releases/tag/v4.0.0) for more information. 

## 3.0.1

### Fixes

We’ve made the following fixes to the tech docs gem in [pull request #281: Don't break TOC when OpenAPI description includes headers](https://github.com/alphagov/tech-docs-gem/pull/281): 

* we now render OpenAPI Markdown with the same Markdown renderer as other documents
* table of contents (TOC) uses `TechDocsHTMLRenderer` to render the headings with IDs

Thanks to [@jamietanna](https://github.com/jamietanna) for contributing to this issue and its solution.

## 3.0.0

### Breaking changes

The search user experience is now more accessible for screenreader users. Search results are now on a separate page instead of a modal window.

Users can no longer see search results as they type. They must press the Return key or select the search button to see the search results page.

This was added in [pull request #263: Change search to only show results after submit](https://github.com/alphagov/tech-docs-gem/pull/263).

### Fixes

- [#265: Fix mark styles in Windows High Contrast Mode](https://github.com/alphagov/tech-docs-gem/pull/265)

## 2.4.3

- [#236: Fix search 'autocomplete' behaviour](https://github.com/alphagov/tech-docs-gem/pull/236)
- [#203: Update vendored javascripts](https://github.com/alphagov/tech-docs-gem/pull/203)

## 2.4.2

- [#251 Fix missing `<ul>` in single page navigation](https://github.com/alphagov/tech-docs-gem/pull/251)

## 2.4.1

- [#248: Remove IE8 fallback PNG with broken image reference](https://github.com/alphagov/tech-docs-gem/pull/248)

## 2.4.0

- [Bump redcarpet to 3.5.1 to fix CVE-2020-26298](https://github.com/alphagov/tech-docs-gem/pull/226)
- [#238: Move the aria-expanded attribute to the correct element](https://github.com/alphagov/tech-docs-gem/pull/238)
- [#240: Update menu html structure so it's one single hierarchical list](https://github.com/alphagov/tech-docs-gem/pull/240)
- [#244: Don't change the focus of the page on initial load](https://github.com/alphagov/tech-docs-gem/pull/244)
- [#243: Fix focus state for links containing inline code](https://github.com/alphagov/tech-docs-gem/pull/243)
- [#245: Fix focus state for search results ‘Close’ button](https://github.com/alphagov/tech-docs-gem/pull/245)
- [#246: Update GOV.UK Frontend to v3.13.0](https://github.com/alphagov/tech-docs-gem/pull/246)

## 2.3.0

- [#232: Update GOV.UK Frontend and use new link styles](https://github.com/alphagov/tech-docs-gem/pull/232)

## 2.2.2

- [#223: Remove unnecessary CSS class on the search submit button](https://github.com/alphagov/tech-docs-gem/pull/223)
- [#224: Accessibility fix: Hide the 'table of contents close' button when search results are open](https://github.com/alphagov/tech-docs-gem/pull/224)

## 2.2.1

- [#218: Remove unnecessary explicit dependencies: sprockets, activesupport, sass and pry](https://github.com/alphagov/tech-docs-gem/pull/218)
- [#125: Fix API docs showing required properties as optional](https://github.com/alphagov/tech-docs-gem/pull/125)

## 2.2.0

### Accessibility Fixes

- [#205: Improve table of contents accessibility](https://github.com/alphagov/tech-docs-gem/pull/205)
- [#209: Some search and keyboard navigation updates](https://github.com/alphagov/tech-docs-gem/pull/209)
- [#210: Stop linking images to new tabs](https://github.com/alphagov/tech-docs-gem/pull/210)
- [#214: Implement row level table headings to allow accessible tables with row headings](https://github.com/alphagov/tech-docs-gem/pull/214)
- [#215: Add tabindex and focus states to code blocks](https://github.com/alphagov/tech-docs-gem/pull/215)

### Docs

- [#206: Remove tdt docs content from readme file](https://github.com/alphagov/tech-docs-gem/pull/206)

## 2.1.1

### Fixes

We’ve made fixes in the following pull requests:

- [#199: Fix page expiry box link colours (hover and focus) ](https://github.com/alphagov/tech-docs-gem/pull/199)

### Ruby version bump

We've updated the Ruby version supported:

- [#201: Bump ruby to 2.7.2](https://github.com/alphagov/tech-docs-gem/pull/201)

## 2.1.0

### New features

#### Exclude pages from search engine results

You can now exclude a page from search engine results by including `prevent_indexing: true` in the page's frontmatter.

This was added in [pull request #192: Fixes and improvements to meta tags](https://github.com/alphagov/tech-docs-gem/pull/192).

### Fixes

We’ve made fixes in the following pull requests:

- [#192: Fixes and improvements to meta tags](https://github.com/alphagov/tech-docs-gem/pull/192)

## 2.0.13

- [Pull request #189: Update orange code highlight colour to meet minimum AA colour contrast ratio criterion](https://github.com/alphagov/tech-docs-gem/pull/189)

## 2.0.12

- [Pull request #179: Use current markup for header and footer](https://github.com/alphagov/tech-docs-gem/pull/179)
- [Pull request #178: Update dependencies and fix tests](https://github.com/alphagov/tech-docs-gem/pull/178) – includes updating GOV.UK Frontend to v3.6.0.
- [Pull request #176: Use correct separator for page titles](https://github.com/alphagov/tech-docs-gem/pull/176)

## 2.0.11

### Fixes

- [Pull request #162: Fix line height spacing for multiline code elements](https://github.com/alphagov/tech-docs-gem/pull/162)
- [Pull request #165: Update header alignment to match layout](https://github.com/alphagov/tech-docs-gem/pull/165)

## 2.0.10

### Fixes

- [Pull request #160: Make sure IDs on collapsible navigation are unique](https://github.com/alphagov/tech-docs-gem/pull/160)

## 2.0.9

### Fixes

- [Pull request #154: Fix table columns breaking content](https://github.com/alphagov/tech-docs-gem/pull/154).
- [Pull request #155: Ensure the page can be pinch to zoomed](https://github.com/alphagov/tech-docs-gem/pull/155).

## 2.0.8

Use of  `govuk-lint` replaced with `rubocop-govuk` due to the former [becoming deprecated](https://github.com/alphagov/govuk-lint/pull/133).

## 2.0.7

A small release to fix an issue where code blocks font size was too large on some browsers.

See [pull request #131: Improve code font sizing ](https://github.com/alphagov/tech-docs-gem/pull/131) for details.


## 2.0.6

This release contains accessibility fixes:

- anchor header links are now properly hidden to assistive technologies
- side navigation items now have consistent visible focus when tabbing between them
- side navigation items have unique Ids
- code elements now scale properly when you enlarge your text
- links with code elements now look correct
- contribution links are now within a landmark

You can look at the [2.0.6 milestone](https://github.com/alphagov/tech-docs-gem/milestone/2?closed=1) for the closed issues, and [pull request #129: Accessibility improvements](https://github.com/alphagov/tech-docs-gem/pull/129) for details on how these issues were fixed.

## 2.0.5

Adds [new global configuration option](https://github.com/alphagov/tech-docs-gem/pull/122) that controls whether review banners appear or not at the bottom of pages when expiry dates are set in the frontmatter.

[Fixes the hard-coded service link](https://github.com/alphagov/tech-docs-gem/pull/119) in the header.

Selectively include only the CSS for the GOV.UK Frontend components that we are using, to reduce the size of the CSS file served to the user ([#118](https://github.com/alphagov/tech-docs-gem/issues/118))

Fix service name to link to the configured `service_link`, rather than being hardcoded to `/` ([#119](https://github.com/alphagov/tech-docs-gem/issues/119))

Add the `show_review_banner` global configuration option allowing users to hide the page review banner.

## 2.0.4

Adds `footer_links` option for displaying links in the footer and ability to hide pages from left hand navigation.

## 2.0.3

Fixes a couple of styling issues: [#100](https://github.com/alphagov/tech-docs-gem/issues/100) and [#106](https://github.com/alphagov/tech-docs-gem/issues/106).

## 2.0.2

This fixes ensures all assets from govuk-frontend are bundled; we were missing some PNG, SVG and ICO files.

## 2.0.1

This fixes an issue where Travis CI wasn’t packaging up the gem with the govuk-frontend module.
Without this the tech-docs have no css styles.

## 2.0.0

This release adds [GOV.UK Frontend](https://github.com/alphagov/govuk-frontend) (part of the [GOV.UK Design System](https://design-system.service.gov.uk)) and remove the legacy framework [GOV.UK Frontend Toolkit](https://github.com/alphagov/govuk_frontend_toolkit). This required a lot of markup being ported over
to use the design system’s markup and all custom CSS to use new variables and mixins.

Custom components such as the table of contents (toc) were updated to use the WCAG 2.1 AA compliant focus states too.

It was also necessary to upgrade the Ruby version to `2.6.3` so that we could bump the gem versions of `govuk_lint`, `rubocop` and `sprockets`. The new version of sprockets allowed us to pull through assets from `node_modules/govuk-frontend` without having to manually include them as was the case before with govuk_frontend_toolkit.

## 1.8.3

Fixes bug where search results disappear when opening results in a new tab, making it difficult to open several results in a batch (PR #86).

## 1.8.2

Adds a `show_expiry` config option to allow you to choose whether to show the review due date and expired banner from your pages. Find out more about the [page expiry and review feature][expiry].

[expiry]: https://tdt-documentation.london.cloudapps.digital/page-expiry.html#page-expiry-and-review

## 1.8.1

This release fixes a bug (#79 - reported in
[alphagov/tech-docs-template#183][tdt-183]) which prevented a multipage site
from being generated when a custom `http_prefix` was configured.

[tdt-183]: https://github.com/alphagov/tech-docs-template/issues/183

## 1.8.0

🎉 Our first contributor from outside of GDS. Thanks [@timja](https://github.com/timja) from [HMCTS](https://hmcts.github.io)! 🤝

New features: you can now configure a different GitHub branch for the repo to generate the "View source" link in the footer. Use `github_branch` in your config file (#71). You can also specify a `full_service_name` in the config, which is used in the browser title and meta tags (#72).

This version also fixes a bug with unclickable links (#74 - reported in [alphagov/tech-docs-template#123](https://github.com/alphagov/tech-docs-template/issues/123)).

## 1.7.0

New features: this release adds support for a full-width page (#63) and adding HTML to the `head` of the page (#64).

This release also makes sure that all pages are returned in the `/api/pages.json` endpoint (#66).

## 1.6.3

The gem now uses `middleman-search-gds` rather than `middleman-search`, which
removes the need for projects to point to the alphagov github repository in
their Gemfiles. We will continue to maintain our own fork until the changes
are merged into the upstream project.

## 1.6.2

This version fixes an issue with Middleman hanging (PR #54). It also allows the API reference page to include multiple servers and their descriptions (PR #53).

## 1.6.1

### Make `api_path` configuration optional

A bug in the previous release prevented the docs from being generated if
`api_path` was missing. This is now fixed.

## 1.6.0

Version 1.6.0 adds API reference generation, and improves the search function.

### New feature: API reference

Specify an OpenAPI spec file using `api_path`, for example: `api_path: source/pets.yml`.

To output the generated content in the page of your choice, write `api>` in any markdown parsed file (.md, .html.md, .html.md.erb). You can also specify to just print a specific path: `api> /pets`

This generates request and response schemas and examples for each API operation.

More info:

- https://github.com/alphagov/tech-docs-gem/pull/40
- https://github.com/alphagov/tech-docs-gem/pull/48

### Search result improvements

The search indexing pipeline has been tweaked to provide expected results. The display of the search results has also been

If you're using search then you'll need to add this line to your project `Gemfile`:

```
gem 'middleman-search', git: 'git://github.com/alphagov/middleman-search.git'
```

More info:
- https://github.com/alphagov/tech-docs-gem/pull/37
- https://github.com/alphagov/tech-docs-gem/pull/38
- https://github.com/alphagov/tech-docs-gem/pull/41
- https://github.com/alphagov/tech-docs-gem/pull/42
- https://github.com/alphagov/tech-docs-gem/pull/43

### Correct fork of middleman in example project

The example gem project now uses alphagov/middleman-search. This prevents `bundle exec middleman serve` from crashing.

More info:
- https://github.com/alphagov/tech-docs-gem/pull/35

### Accessibility improvements

Accessibility improvements to search, collapsible navigation, and the logo.

More info:
- https://github.com/alphagov/tech-docs-gem/pull/36
- https://github.com/alphagov/tech-docs-gem/pull/33

### Additional configuration options for review system

`default_owner_slack` and `owner_slack_workspace` are now configurable for use within the review system.

More info:
- https://github.com/alphagov/tech-docs-gem/pull/47

### Correct fork of middleman in example project

The example gem project now uses alphagov/middleman-search. This prevents `bundle exec middleman serve` from crashing.

More info:
- https://github.com/alphagov/tech-docs-gem/pull/35

### Accessibility improvements

Accessibility improvements to search, collapsible navigation, and the logo.

More info:
- https://github.com/alphagov/tech-docs-gem/pull/36
- https://github.com/alphagov/tech-docs-gem/pull/33

### Search result improvements

The search indexing pipeline has been tweaked to provide expected results. The display of the search results has also been improved.

If you're using search then you'll need to add this line to your project `Gemfile`:

```
gem 'middleman-search', git: 'git://github.com/alphagov/middleman-search.git'
```

More info:
- https://github.com/alphagov/tech-docs-gem/pull/37
- https://github.com/alphagov/tech-docs-gem/pull/38
- https://github.com/alphagov/tech-docs-gem/pull/41
- https://github.com/alphagov/tech-docs-gem/pull/42
- https://github.com/alphagov/tech-docs-gem/pull/43

## 1.5.0

### New feature: Search

Adds search functionality. This indexes pages only and is not recommended for single-page sites. To enable write `enable_search: true` in in tech-docs.yml.

More info:
- https://github.com/alphagov/tech-docs-gem/pull/28

### Google Analytics tracking for old headings

An event category 'Broken fragment ID' will be pushed to Google Analytics when a user lands on a page with a URL that points to a fragment ID that does not exist on the page.

More info:
- https://github.com/alphagov/tech-docs-gem/pull/30

## 1.4.0

Adds multiple page navigation support and collapsible top level navigation
items. When enabled the table of contents will display other pages on the site.

More info:
- https://github.com/alphagov/tech-docs-gem/pull/27

## 1.3.1

Minor update to Google Analytics tracking

More info:
- https://github.com/alphagov/tech-docs-gem/pull/25

## 1.3.0

Version 1.3.0 contains accessibility fixes (#20) and a fix to make the
site more robust when certain options aren't set in the configs (#17).

### New feature: passing options to `GovukTechDocs.configure`

You can now pass options into `GovukTechDocs.configure` for the `livereload`
extension.

```rb
GovukTechDocs.configure(self, livereload: { js_host: 'localhost' })
```

See PR #18.

### New feature: page parents

You can now specify a page’s parent in its frontmatter. This affects
which item is selected in the navigation.

More info:

- https://github.com/alphagov/tech-docs-gem/pull/19
- https://github.com/alphagov/tech-docs-gem/blob/main/docs/frontmatter.md#parent

## 1.2.0

### New feature: redirects

You can now specify redirects in the frontmatter and `config/tech-docs.yml`.

You can use this when you change a page URL.

More info:

- https://github.com/alphagov/tech-docs-gem/blob/main/docs/configuration.md#redirects
- https://github.com/alphagov/tech-docs-gem/blob/main/docs/frontmatter.md#old_paths

### New feature: contribution banner

You can now show a block at the bottom of the page that links to
the page source on GitHub, so readers can easily contribute back to the documentation.

https://github.com/alphagov/tech-docs-gem/blob/main/docs/configuration.md#show_contribution_banner

### New feature: page review system

An optional page review system to make sure documentation stays up to date.

More info:

- https://github.com/alphagov/tech-docs-gem/blob/main/docs/frontmatter.md#last_reviewed_on
- https://github.com/alphagov/tech-docs-gem/blob/main/docs/frontmatter.md#owner_slack


### Better meta tags

Pages now include better meta tags for search engines, Twitter, Facebook and Slack to pick up.

## 1.1.0

You can now specify `google_site_verification` in tech-docs.yml. You can use
this to verify your site in Google Webmaster tools.

https://github.com/alphagov/tech-docs-gem/blob/main/docs/configuration.md#google_site_verification

## 1.0.0

The first release of the template as a gem. Most CSS, JS, images and layouts are
now imported from the gem and can be removed from your project.

The following script upgrades your project. This will work if you've not made
any modifications to the files distributed by the template. If you have, you'll
need to port your changes back in.

```sh
rm -rf lib source/images source/layouts source/favicon.ico source/javascripts/* source/stylesheets/*

echo "//= require govuk_tech_docs" > source/javascripts/application.js
echo "@import 'govuk_tech_docs';" > source/stylesheets/screen.css.scss

echo '$is-print: true;

@import "govuk_tech_docs";' > source/stylesheets/print.css.scss

echo '$is-ie: true;
$ie-version: 8;

@import "govuk_tech_docs";' > source/stylesheets/screen-old-ie.css.scss

echo "require 'govuk_tech_docs'

GovukTechDocs.configure(self)" > config.rb

echo "source 'https://rubygems.org'

# For faster file watcher updates on Windows:
gem 'wdm', '~> 0.1.0', platforms: [:mswin, :mingw]

# Windows does not come with time zone data
gem 'tzinfo-data', platforms: [:mswin, :mingw, :jruby]

gem 'govuk_tech_docs'" > Gemfile

bundle install
```