PRLabelChecker.yml

name: Label Checker
on:
  pull_request:
    branches: main
    types: [opened, labeled, unlabeled, synchronize, reopened]
permissions:
  pull-requests: read
  contents: read

jobs:
  check-labels:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Ensure exactly one "kind/*" label is applied
        run: |
          # Count the number of "kind/*" labels directly from the PR labels
          PR_NUMBER=${{ github.event.pull_request.number }}
          KIND_LABEL_COUNT=$(gh pr view "$PR_NUMBER" --json labels -q '.labels.[].name' | grep -c '^kind/')

          if [[ "$KIND_LABEL_COUNT" -eq 1 ]]; then
            echo "✅ Exactly one 'kind/*' label is applied."
            exit 0
          else
            echo "❌ PR must have exactly one 'kind/*' label, but found $KIND_LABEL_COUNT."
            exit 1
          fi
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}