Scheduled jobs #18940

	name: 'Scheduled jobs'
	on:
	schedule:
	# GitHub Actions' `cron` uses UTC, which, given daylight savings time, is
	# pretty useless if one wants a consistent local starting time. Instead,
	# we'll just run a Python script every hour and implement the schedule in
	# that script. This also allows for things that aren't possible with a
	# `cron` expression, like biweekly intervals.
	#
	# Additionally, GitHub documents that scheduled events can be delayed during
	# periods of high load, or even skipped. To reduce the chances of these
	# restrictions impacting our schedule, we run the script more than once per
	# hour.
	#
	# https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule
	#
	- cron: '3,23,43 * * * *'

	jobs:
	schedule:
	runs-on: 'ubuntu-22.04' # has Python 3.10.12, which is fine for our purposes
	permissions:
	issues: 'write'
	env:
	# This must be a classic access token with `repo` scope so that it can
	# create issues in the private `azul-private` repo. A fine-grained token
	# didn't work at the time this comment was written.
	#
	GITHUB_TOKEN: '${{ secrets.AZUL_GITHUB_ACCESS_TOKEN_SCHEDULE_ACTION }}'
	steps:
	- uses: 'actions/checkout@v3'
	with:
	sparse-checkout: '.github'
	- run: 'python3 .github/workflows/schedule.py'

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