Update single-platform release tests branches #100

	name: Update single-platform release tests branches

	on:
	# allow triggering this action manually
	workflow_dispatch:
	# run every saturday (at noon UTC), so the builds occur during the weekend during lower CI load
	schedule:
	- cron: '0 12 * * 6'

	jobs:
	updateSinglePlatformBranches:
	name: Merge main into single-platform release test branches
	runs-on: ubuntu-latest
	# GITHUB_TOKEN change from read-write to read-only on 2024-02-01 requires permissions block
	# https://docs.opensource.microsoft.com/github/apps/permission-changes/
	# https://docs.github.com/en/actions/using-jobs/assigning-permissions-to-jobs
	permissions:
	contents: write

	steps:
	- name: Checkout repo
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: 'Update branches'
	run: \|
	set -ex
	git config user.email "github-actions-single-platform-branch-updater@xamarin.com"
	git config user.name "GitHub Actions Single Platform Branch Updater"
	for platform in dotnet-iOS dotnet-tvOS dotnet-MacCatalyst dotnet-macOS dotnet legacy legacy-iOS legacy-macOS; do
	git checkout -b release-test/only-$platform origin/release-test/only-$platform
	git merge origin/main
	git push
	done

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