name: PR
on: [pull_request]

jobs:
  pr:
    strategy:
      fail-fast: false
      matrix:
        step: ['lint', 'test', 'build']
    runs-on: ubuntu-latest
    env:
      YARN_ENABLE_SCRIPTS: false
    steps:
    - uses: actions/checkout@v4
    - uses: actions/setup-node@v4
      with:
        node-version: 'lts/*'
    - name: ${{ matrix.step }}
      if: always()
      run: |
        yarn install --immutable
        yarn ${{ matrix.step }}
    # `yarn lint` runs eslint --fix and `yarn build` regenerates the augment
    # interfaces, so both pass on a tree they rewrote. The committed tree must
    # already be what they produce.
    - name: tree unchanged
      run: git diff --exit-code --stat
    # The package.json each build/ directory holds is what npm receives: every
    # entry point must name a file that is there, with no ./build/ or ./cjs/cjs/
    # path and no string spread into exports (the January 2026 fault).
    - name: check built manifests
      if: matrix.step == 'build'
      run: python3 scripts/check-built-manifests.py .