delete-branch-on-merge.yml

name: 🗑️ Delete Branch on Merge

on:
  pull_request:
    types: [closed]
    branches: [main]

jobs:
  delete-merged-branch:
    name: 🗑️ Delete merged branch
    runs-on: ubuntu-latest
    if: |
      github.event.pull_request.merged == true &&
      github.event.pull_request.head.repo.full_name == github.repository
    permissions:
      contents: write

    steps:
      - name: 📥 Checkout
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7

      - name: 🗑️ Delete merged branch
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          BRANCH_NAME="${{ github.event.pull_request.head.ref }}"

          # Protect default and release branches
          case "$BRANCH_NAME" in
            main|develop|master|releases/*)
              echo "⚠️ Protected branch '$BRANCH_NAME' will not be deleted."
              exit 0
              ;;
          esac

          echo "🗑️ Deleting merged branch: $BRANCH_NAME"
          gh api "repos/${{ github.repository }}/git/refs/heads/${BRANCH_NAME}" --method DELETE \
            || echo "⚠️ Could not delete branch '$BRANCH_NAME' (already removed or from a fork)."
          echo "✅ Branch '$BRANCH_NAME' cleanup completed."