cleanup-branches.yml

name: Cleanup Merged Branches

on:
  pull_request:
    types: [closed]

permissions: {}

jobs:
  delete-branch:
    if: github.event.pull_request.merged == true
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/github-script@373c709c69115d41ff229c7e5df9f8788daa9553 # v9
        with:
          script: |
            const branch = context.payload.pull_request.head.ref;
            if (['master', 'main', 'next'].includes(branch)) return;
            try {
              await github.rest.git.deleteRef({
                owner: context.repo.owner,
                repo: context.repo.repo,
                ref: `heads/${branch}`,
              });
              console.log(`Deleted branch: ${branch}`);
            } catch (e) {
              console.log(`Branch ${branch} already deleted or protected`);
            }