update-single-platform-branches.yml

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; do
            git checkout -b release-test/only-$platform origin/release-test/only-$platform
            git merge origin/main
            git push
          done