name: Test Pull Requests

on: [pull_request]

jobs:
  build:
    runs-on: ubuntu-latest

    timeout-minutes: 30

    strategy:
      matrix:
        node-version: [14.x, 16.x, 18.x]

    steps:
      - uses: actions/checkout@v3

      - name: Use Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@v3
        with:
          node-version: ${{ matrix.node-version }}
          cache: 'npm'

      - name: Install npm and dependencies
        run: npm install -g npm@latest && npm install

      - name: Build
        run: npm run build --if-present

      - name: Test
        run: npm run test

      - name: Fetch base branch for `git diff`
        run: git fetch origin ${{ github.event.pull_request.base.ref }}:${{ github.event.pull_request.base.ref }}

      - name: Run ESLint on changes only
        env:
          ESLINT_PLUGIN_DIFF_COMMIT: ${{ github.event.pull_request.base.ref }}
        run: npm run lint