lint.yml

name: Lint

on: [pull_request, push]

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - id: changedfiles
        name: Get list of changed .py files
        run: |
          set -x
          echo "CHANGED_FILES=$(git diff --name-only --diff-filter=ACMRT ${{ github.event.pull_request.base.sha }} ${{ github.sha }} | grep .py$ | xargs)" >> "$GITHUB_OUTPUT"
          if [[ $(git diff --name-only --diff-filter=ACMRT ${{ github.event.pull_request.base.sha }} ${{ github.sha }} | grep .py$ | wc -l) -eq 0 ]]; then
            echo "HAS_CHANGES=false" >> "$GITHUB_OUTPUT"
          else
            echo "HAS_CHANGES=true" >> "$GITHUB_OUTPUT"
          fi
      - uses: actions/setup-python@v4
        name: Setup python for isort
        if: steps.changedfiles.outputs.HAS_CHANGES == 'true'
        with:
          python-version: "3.10"
      - name: Run isort on changed files
        if: steps.changedfiles.outputs.HAS_CHANGES == 'true'
        run: |
          set -x
          python -m pip install isort
          isort --check ${{ steps.changedfiles.outputs.CHANGED_FILES }}
      - uses: psf/black@stable
        name: Run black on changed files
        if: steps.changedfiles.outputs.HAS_CHANGES == 'true'
        with:
          src: ${{ steps.changedfiles.outputs.CHANGED_FILES }}