ci.yml

name: CI (new-flat subpackages)

on:
  pull_request:
  merge_group:
  push:
    branches: [main]

jobs:
  discover-subpackages:
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.discover.outputs.matrix }}
      run_template_smoke: ${{ steps.discover.outputs.run_template_smoke }}
      reason: ${{ steps.discover.outputs.reason }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: astral-sh/setup-uv@v5
      - name: Discover changed subpackages
        id: discover
        run: |
          # Resolve a base SHA we can diff against. Each event type carries
          # the right base under a different payload key.
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            BASE_SHA="${{ github.event.pull_request.base.sha }}"
            BASE_REF="${{ github.base_ref }}"
          elif [ "${{ github.event_name }}" = "merge_group" ]; then
            BASE_SHA="${{ github.event.merge_group.base_sha }}"
            BASE_REF="main"
          else
            BASE_SHA="${{ github.event.before }}"
            BASE_REF="main"
          fi
          # Fallback to HEAD~1 if the event base is not available or zeroed.
          if [ -z "$BASE_SHA" ] || [ "$BASE_SHA" = "0000000000000000000000000000000000000000" ]; then
            BASE_SHA="HEAD~1"
          fi
          # Fail loud rather than fall through to `git ls-files` — the latter
          # silently runs the full matrix on every PR if the base ref is bad,
          # which masks the real problem (missing fetch depth, wrong base sha).
          CHANGED=$(git diff --name-only "$BASE_SHA"...HEAD)
          uv run python .github/scripts/discover_subpackages.py \
            --changed-files "${CHANGED}" \
            --base-ref "${BASE_REF}" \
            --repo-root "${{ github.workspace }}"

  template-smoke:
    needs: discover-subpackages
    if: needs.discover-subpackages.outputs.run_template_smoke == 'true'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: astral-sh/setup-uv@v5
      - name: Generate demo subpackage
        run: |
          mkdir -p /tmp/template-smoke
          cd /tmp/template-smoke
          uv run --with cookiecutter cookiecutter \
            "${{ github.workspace }}/cookiecutter" \
            --no-input \
            name=tplsmoke \
            core_path=stdlib.sampling_algos
      - name: Test demo subpackage
        run: |
          cd /tmp/template-smoke/tplsmoke
          uv sync --all-extras
          uv run pytest -v -m "not qualitative and not e2e"

  test:
    needs: discover-subpackages
    if: fromJson(needs.discover-subpackages.outputs.matrix)[0] != null
    strategy:
      fail-fast: false
      matrix:
        package: ${{ fromJson(needs.discover-subpackages.outputs.matrix) }}
    uses: ./.github/workflows/package-ci.yml
    with:
      package: ${{ matrix.package }}