name: Check PR Title

on:
  pull_request:
    types: [opened, edited]

permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  lint-pr-title:
    name: Lint PR title
    runs-on: ubuntu-latest

    if: ${{ (github.event.action == 'opened' || github.event.changes.title != null) && github.actor != 'renovate[bot]' }}

    steps:
      - name: Checkout
        uses: actions/checkout@v5
        with:
          persist-credentials: false
          # Only fetch the config file from the repository
          sparse-checkout-cone-mode: false
          sparse-checkout: commitlint.config.ts

      - name: Install dependencies
        run: npm install -D @commitlint/cli @commitlint/config-conventional

      - name: Validate PR title with commitlint
        run: echo "$PR_TITLE" | npx commitlint
        env:
          PR_TITLE: ${{ github.event.pull_request.title }}