Extract section from changelog #9

	# Cut a release whenever a new tag is pushed to the repo.
	name: Release

	on:
	push:
	tags:
	- "v..*"

	permissions:
	contents: write

	jobs:
	tests:
	# Do only release when CI succeeds.
	uses: ./.github/workflows/workflow.yaml

	release:
	# Do only release when CI succeeds.
	needs: [tests]
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Get version number
	id: get-version
	run: set -x; echo "version=${GITHUB_REF_NAME#v}" >> $GITHUB_OUTPUT
	- name: Read section from CHANGELOG.md
	id: extract-changelog
	uses: sean0x42/markdown-extract@v2
	with:
	file: CHANGELOG.md
	pattern: ${{ steps.get-version.outputs.version }}
	- name: Prepare release notes and artifacts
	run: \|
	.github/workflows/release_prep.sh ${{ env.GITHUB_REF_NAME }} > release_notes.txt
	printf '${{ steps.extract-changelog.outputs.markdown }}' >> release_notes.txt
	- name: Release
	uses: softprops/action-gh-release@v1
	with:
	draft: true
	prerelease: true
	# Use GH feature to populate the changelog automatically
	generate_release_notes: true
	body_path: release_notes.txt
	fail_on_unmatched_files: true
	files: rules_nixpkgs-.tar.gz

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