Docs

Mouse and selection #27

	name: Docs

	on:
	push:
	branches: [main]
	paths:
	- 'docs/**'
	- '.github/workflows/docs.yml'
	pull_request:
	paths:
	- 'docs/**'
	- '.github/workflows/docs.yml'
	workflow_dispatch:

	permissions:
	contents: read
	pages: write
	id-token: write

	# One deploy at a time. In-progress runs finish rather than being cancelled,
	# so a half-uploaded artifact never becomes the live site.
	concurrency:
	group: pages
	cancel-in-progress: false

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	# Cheap, and it catches the one failure Jekyll reports as success: a
	# `parent:` that matches no title, which drops the page from the sidebar.
	- uses: actions/setup-node@v4
	with:
	node-version: 22
	- name: Check the docs tree
	run: node scripts/check-docs.mjs

	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: '3.3'
	bundler-cache: true
	working-directory: docs

	- uses: actions/configure-pages@v5
	id: pages

	# `baseurl` comes from _config.yml, not from configure-pages, so that the
	# site built in CI is the same one `jekyll serve` builds locally.
	- name: Build
	run: bundle exec jekyll build --trace
	working-directory: docs
	env:
	JEKYLL_ENV: production

	- uses: actions/upload-pages-artifact@v3
	with:
	path: docs/_site

	deploy:
	# A pull request builds, to catch a broken page before it merges, but only
	# main is published.
	if: github.ref == 'refs/heads/main' && github.event_name != 'pull_request'
	needs: build
	runs-on: ubuntu-latest
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	steps:
	- uses: actions/deploy-pages@v4
	id: deployment

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