name: PR Title Check

on:
  pull_request:
    branches:
      - main

jobs:
  check-title:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check PR title when source files change
        env:
          PR_TITLE: ${{ github.event.pull_request.title }}
        run: |
          git fetch origin "${{ github.base_ref }}"
          git diff --name-only "origin/${{ github.base_ref }}...HEAD" \
            | scripts/ci/check-pr-title.sh "$PR_TITLE"