Update Snippets #1

	name: Update Snippets

	on:
	# Ideally people making changes should re-run this task, but probably
	# won't remember - I think once a month is probably often enough.
	schedule:
	- cron: "51 03 15 * *" # 03:51 on the 15th of the month
	workflow_dispatch:

	jobs:
	update-snippets:
	runs-on: ubuntu-latest
	env:
	BRANCH: update-snippets
	SNIPPETS_FILE: cylc-snippets.json
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	ref: master

	- name: Install Cylc
	run: pip install cylc-flow

	- name: Configure git
	uses: cylc/release-actions/configure-git@v1

	- name: Checkout PR branch
	# Automatically checks out remote branch if it exists
	run: git switch -c "$BRANCH"

	- name: Update Snippets
	run: ./bin/build_snippets.py

	- name: git diff
	id: diff
	continue-on-error: true
	run: \|
	if git diff --stat --exit-code -- "$SNIPPETS_FILE"; then
	echo "::notice::No changes to ${SNIPPETS_FILE} occurred"
	exit 1
	fi

	- name: Commit & push
	if: steps.diff.outcome == 'success'
	run : \|
	git add "$SNIPPETS_FILE"
	git commit -m "Update snippets for Cylc $(cylc version)" -m "Workflow: ${{ github.workflow }}, run: ${{ github.run_number }}"
	git push

	- name: Create pull request
	if: steps.diff.outcome == 'success'
	uses: cylc/release-actions/create-pr@v1
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	with:
	head: ${{ env.BRANCH }}
	title: 'Auto PR: update Cylc Snippets'
	body: 'This PR reflects changes to the Cylc Workflow configuration specification.'

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