style.yml

name: Style Check

on:
  workflow_dispatch:
  push:
    branches:
      - main
  pull_request:
    types: [opened, reopened, synchronize] # Rebuild on new pushes to PR

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  style-check:
    permissions:
      contents: write
    runs-on: ubuntu-latest
    steps:
      - name: Checkout source code
        uses: actions/checkout@v4
        with:
          repository: ${{ github.event.pull_request.head.repo.full_name || github.repository }}
          ref: ${{ github.event.pull_request.head.sha || github.ref }}
          token: ${{ secrets.GITHUB_TOKEN }}
      - name: Set up Python version
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'
      - name: Install dependencies
        run: |
          pip install -U -r python/requirements_style.txt
      - name: Apply style formatting
        if: github.event_name == 'pull_request'
        run: |
          python util/check_style.py --apply
      - name: Check style formatting
        if: github.event_name != 'pull_request'
        run: |
          python util/check_style.py
      - name: Commit and push changes
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
        run: |
          git config --global user.name 'github-actions[bot]'
          git config --global user.email 'github-actions[bot]@users.noreply.github.com'
          git add -u
          if ! git diff --staged --quiet; then
            git commit -m "Apply automatic code formatting"
            git push || exit 1
          else
            echo "No formatting changes needed"
          fi
      - name: Check for formatting changes from fork
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository
        run: |
          git add -u
          if ! git diff --staged --quiet; then
            echo "::error::This PR requires formatting changes but is from a fork. Please run 'python util/check_style.py --apply' locally and push the changes."
            exit 1
          else
            echo "No formatting changes needed"
          fi