lint.yml

name: Lint

on:
  push:
    branches: [main]
  pull_request:

permissions:
  contents: write

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          repository: ${{ github.event.pull_request.head.repo.full_name || github.repository }}
          ref: ${{ github.event.pull_request.head.ref || github.ref_name }}
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.9'
      - name: Install pre-commit
        run: pip install pre-commit
      - name: Run pre-commit (autofix)
        run: pre-commit run --all-files || true
      - name: Commit fixes if any
        if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
        run: |
          git diff --quiet && exit 0
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add -A
          git commit -m "style: auto-fix lint (black + isort)"
          git push
      - name: Ensure lint leaves clean tree
        run: |
          git diff --quiet && exit 0
          echo "Lint generated changes that could not be auto-pushed in this context."
          echo "Please run 'pre-commit run --all-files' locally and push the fixes."
          git --no-pager diff --name-only
          exit 1