check-pr-title.yml

name: Validate PR Title

on:
  pull_request:
    types: [opened, edited, synchronize]

jobs:
  validate-pr-title:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Enable corepack
        run: |
          corepack enable
          corepack prepare yarn@4.2.2 --activate
          yarn set version 4.2.2

      - name: Set up Node.js environment
        uses: actions/setup-node@v4.0.4
        with:
          node-version: '>=18.12.x'

      - name: Install dependencies
        run: yarn install

      - name: Extract PR title
        id: extract_pr_title
        run: echo "title=$(jq -r '.pull_request.title' $GITHUB_EVENT_PATH)" >> $GITHUB_OUTPUT

      - name: Fetch commit messages
        id: fetch_commits
        run: |
          commits=$(jq -r '.pull_request.commits_url' $GITHUB_EVENT_PATH)
          curl -s $commits | jq -r '.[].commit.message' > commit_messages.txt
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Check for release commit
        id: check_commit
        # Check if any commit message starts with [RELEASE]
        run: |
          if grep -qE '^\[RELEASE\]' commit_messages.txt; then
            echo "contains_release=true" >> $GITHUB_ENV
          else
            echo "contains_release=false" >> $GITHUB_ENV
          fi

      - name: Validate PR title
        id: check_pr_title
        run: |
          if [[ "${{ env.contains_release }}" == "true" && ! "${{ steps.extract_pr_title.outputs.title }}" =~ ^\[RELEASE\] ]]; then
            echo "PR title must start with [RELEASE] if any commit starts with [RELEASE]."
            exit 1
          else
            echo "${{ steps.extract_pr_title.outputs.title }}" | yarn commitlint --verbose
          fi