name: Release Python packages

on:
  push:
    branches:
      - main
    paths:
      - ".github/release-please/**"
      - ".github/workflows/release-python.yml"
      - "python-packages/**"
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write
  id-token: write

jobs:
  detect_python_packages:
    runs-on: ubuntu-latest
    outputs:
      has_python_packages: ${{ steps.detect.outputs.has_python_packages }}
    steps:
      - uses: actions/checkout@v4
      - id: detect
        shell: bash
        run: |
          if find python-packages -mindepth 2 -maxdepth 2 -name pyproject.toml -print -quit | grep -q .; then
            echo "has_python_packages=true" >> "$GITHUB_OUTPUT"
          else
            echo "has_python_packages=false" >> "$GITHUB_OUTPUT"
          fi

  scaffold-only:
    needs: detect_python_packages
    if: ${{ needs.detect_python_packages.outputs.has_python_packages != 'true' }}
    runs-on: ubuntu-latest
    steps:
      - run: echo "No Python package exists yet. release-please remains scaffold-only."

  release:
    needs: detect_python_packages
    if: ${{ needs.detect_python_packages.outputs.has_python_packages == 'true' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - id: release
        uses: googleapis/release-please-action@v4
        with:
          config-file: .github/release-please/python-config.json
          manifest-file: .github/release-please/python-manifest.json

      - name: Reminder
        if: ${{ steps.release.outputs.releases_created == 'true' }}
        run: |
          echo "Python package release metadata was created."
          echo "Wire package-specific build/publish steps here when the first python package is added."