.github/workflows/pr_title_check.yml

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name: Check PR Title

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

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

permissions:
  contents: read

jobs:
  check-pr-title:
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4
      - name: Check PR title
        env:
          PR_TITLE: ${{ github.event.pull_request.title }}
        run: |
          if ! echo $PR_TITLE | grep -Eq '^(\w+)(\(.+\))?: .+$'; then
            echo "PR title does not follow conventional commit style."
            echo "Please use a title in the format: type: message, or type(scope): message"
            echo "Example: feat: Add support for sort-merge join"
            exit 1
          fi