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Post a before/after screenshot gallery on every stylesheet PR #3

	name: Screens

	# Runs in the PR's own context, so it also works for pull requests from forks —
	# which means it gets a read-only token and no secrets. It only produces an
	# artifact; publishing the images and posting the comment is screens-comment.yml,
	# which runs afterwards with the repository's own permissions.
	on:
	pull_request:
	paths:
	- 'app/assets/stylesheets/**'
	- 'test/screens/**'
	- '.github/workflows/screens.yml'

	permissions:
	contents: read

	jobs:
	shoot:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

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

	- name: Shoot both revisions
	run: bundle exec rake "screens[origin/${{ github.base_ref }}]"

	- name: Record which PR this was
	run: echo "${{ github.event.pull_request.number }}" > tmp/screens/pr-number

	- uses: actions/upload-artifact@v4
	with:
	name: screens
	path: \|
	tmp/screens/before
	tmp/screens/after
	tmp/screens/pr-number
	retention-days: 7