name: rules

on:
  workflow_dispatch: {}
  pull_request:
    types:
      - auto_merge_enabled

permissions: {}

jobs:
  require_merge_commit_on_merge_script_pr:
    name: Merge script PRs must create merge commits
    if: ${{ contains(github.head_ref, '/merge-') }}
    runs-on: ubuntu-latest
    steps:
      - run: |
          if ${{ github.event.pull_request.auto_merge.merge_method != 'merge' }}; then
            echo "Auto-merge method must be 'merge' instead of '${{github.event.pull_request.auto_merge.merge_method}}'"
            exit 1
          fi