name: Sync requirements for Python dependency PRs

on:
  pull_request:
    types: [opened, synchronize]

permissions:
  contents: write
  pull-requests: read

jobs:
  sync-python-dep-requirements:
    if: ${{ github.event.pull_request.user.login == 'dependabot[bot]' }}
    runs-on: ubuntu-slim
    steps:
      - name: Fetch Dependabot metadata
        id: dependabot-metadata
        uses: dependabot/fetch-metadata@25dd0e34f4fe68f24cc83900b1fe3fe149efef98 # v3.1.0

      - name: Checkout source code
        if: ${{ steps.dependabot-metadata.outputs.package-ecosystem == 'pip' }}
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          persist-credentials: false

      - name: Setup Python
        if: ${{ steps.dependabot-metadata.outputs.package-ecosystem == 'pip' }}
        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
        with:
          python-version-file: 'pyproject.toml'

      - name: Install uv
        run: pip install uv==0.11.17

      - name: Sync requirements
        if: ${{ steps.dependabot-metadata.outputs.package-ecosystem == 'pip' }}
        run: ./scripts/uv-pip-compile.sh

      - name: Push changes to remote PRs
        if: ${{ steps.dependabot-metadata.outputs.package-ecosystem == 'pip' }}
        run: |
          git config user.name 'github-actions[bot]'
          git config user.email '41898282+github-actions[bot]@users.noreply.github.com'
          git add requirements
          git diff --cached --quiet && exit 0
          git commit --signoff "build(deps) sync pinned requirements for Dependabot pip PRs"
          git push origin "HEAD:refs/heads/${GITHUB_EVENT_PULL_REQUEST_HEAD_REF}"
        env:
          GITHUB_EVENT_PULL_REQUEST_HEAD_REF: ${{github.event.pull_request.head.ref}}