label_check.yml

name: Check release label

on:
  pull_request:
    types:
      - synchronize
      - opened
      - reopened
      - edited
      - labeled
      - unlabeled

jobs:
  label_check:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v6

      - name: Wait for bot to set label
        run: sleep 10

      - name: Check labels
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # Get PR number and repo name from event payload
          PR_NUMBER=$(jq -r .pull_request.number "$GITHUB_EVENT_PATH")
          REPO_FULL_NAME=$(jq -r .repository.full_name "$GITHUB_EVENT_PATH")

          # Fetch fresh PR data from GitHub API
          PR_DATA=$(curl -s -H "Authorization: token $GITHUB_TOKEN" \
            "https://api.github.com/repos/$REPO_FULL_NAME/issues/$PR_NUMBER")

          NUMBER_OF_LABELS=$(echo "$PR_DATA" | jq '.labels | length')
          if [ $NUMBER_OF_LABELS -eq 0 ]; then
            echo "PR has no labels. Please add at least one label of release type."
            exit 1
          fi

          RELEASE_LABELS=("release::enhancements" "release::bug_fixes" "release::ci_docs" "release::maintenance")
          PR_LABELS=$(echo "$PR_DATA" | jq -r '.labels[].name')
          NB_RELEASE_LABELS=0

          for LABEL in $PR_LABELS; do
            if [[ " ${RELEASE_LABELS[@]} " =~ " ${LABEL} " ]]; then
              NB_RELEASE_LABELS=$((NB_RELEASE_LABELS+1))
            fi
          done

          if [ $NB_RELEASE_LABELS -eq 0 ]; then
            echo "PR has no release labels. Please add a label of release type."
            exit 1
          elif [ $NB_RELEASE_LABELS -gt 1 ]; then
            echo "PR has multiple release labels. Please remove all but one label."
            exit 1
          fi