update-branches.yaml

name: Auto-update branches

on:
  push:
    branches:
      - main
      - 'release-[0-9]+.[0-9]+'

permissions:
  contents: read

jobs:
  update:
    name: "${{ matrix.patch }}"
    permissions:
      contents: write  # for Git to git push
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        patch: ["strict", "moonray"]
    outputs:
      branch: ${{ steps.determine.outputs.branch }}
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@v2
        with:
          egress-policy: audit
      - name: Determine branch
        id: determine
        env:
          BRANCH: ${{ github.ref }}
        run: |
          BRANCH=${BRANCH#refs/heads/}  # strip off refs/heads/ if it exists
          if [[ "${BRANCH}" == "main" ]]; then
            echo "branch=autoupdate/${{ matrix.patch }}" >> "$GITHUB_OUTPUT"
          elif [[ "${BRANCH}" =~ ^release-[0-9]+\.[0-9]+$ ]]; then
            echo "branch=autoupdate/${BRANCH}-${{ matrix.patch }}" >> "$GITHUB_OUTPUT"
          else
            exit 1
          fi
      - name: Sync ${{ github.ref }} to ${{ steps.determine.outputs.branch }}
        uses: actions/checkout@v4
        with:
          ssh-key: ${{ secrets.BOT_SSH_KEY }}
      - name: Apply ${{ matrix.patch }} patch
        run: |
          git checkout -b ${{ steps.determine.outputs.branch }}
          ./build-scripts/patches/${{ matrix.patch }}/apply
      - name: Push to ${{ steps.determine.outputs.branch }}
        run: |
          git push origin --force ${{ steps.determine.outputs.branch }}