check_labels.yml

name: Check Labels

# Every PR should have a label and some labels should include an update to the release notes
on:
  pull_request:
    branches-ignore:
      - 'main'
    types: [ synchronize, labeled, unlabeled ]

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref }}
  cancel-in-progress: true

jobs:
  labels-check:
    # https://github.com/actions/virtual-environments/
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
      - name: Check PR labels
        env:
          ALL_PR_LABELS: toJson(github.event.pull_request.labels.*.name)
        run: |
          echo "$ALL_PR_LABELS"
          all_pr_labels= $(jq -r '.[]' <<< $$ALL_PR_LABELS )

          if [[ "${all_pr_labels[@]}" =~ 'Breaking change' || "${all_pr_labels[@]}" =~ 'Feature' || "${all_pr_labels[@]}" =~ 'Fix' ]]
          then
            git fetch origin develop --depth 1
            if [ -n "$(git diff origin/develop RELEASE_NOTES.md)" ]
            then
              echo "RELEASE_NOTES.md was updated"
              exit 0
            else
              echo "::error::Add release notes for your PR by updating RELEASE_NOTES.md"
              exit 1
            fi
          elif [[ "${all_pr_labels[@]}" =~ 'Dependencies' || "${all_pr_labels[@]}" =~ 'Chore' ]]
            then
              echo "No extra actions needed for used labels"
              exit 0
            fi
          echo "::error::You must add a valid label to this PR"
          exit 1