name: Require changelog entry

on:
  pull_request:
    types: [opened, synchronize, reopened, labeled, unlabeled]

jobs:
  check-changelog:
    if: contains(github.event.pull_request.labels.*.name, 'changelog')
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v3
      with:
        fetch-depth: 0
    - name: Check if changes to CHANGELOG.md
      shell: bash
      env:
        BASE_REF: ${{ github.event.pull_request.base.ref }}
      run: .github/scripts/check-changelog.sh