name: Linting

on: [push,pull_request]

jobs:
  precheck:
    runs-on: ubuntu-20.04

    outputs:
      should_skip: ${{ steps.skip_check.outputs.should_skip }}
    steps:
      - id: skip_check
        uses: fkirc/skip-duplicate-actions@master
        with:
          # skip concurrent jobs if they are on the same thing
          concurrent_skipping: 'same_content'
          # never skip PR + manual/scheduled runs
          do_not_skip: '["pull_request", "workflow_dispatch", "schedule"]'

  flake8:
    needs: precheck
    if: ${{ needs.precheck.outputs.should_skip != 'true' }}
    runs-on: ubuntu-20.04

    strategy:
      matrix:
        python-version: [3.9]

    steps:
      - uses: actions/checkout@master
      - name: Setup Python ${{ matrix.python-version }}
        uses: actions/setup-python@v1
        with:
          python-version: ${{ matrix.python-version }}
          architecture: x64
      - name: Install flake8
        run: pip install flake8
      - name: Run flake8
        uses: suo/flake8-github-action@releases/v1
        with:
          checkName: 'flake8'   # NOTE: this needs to be the same as the job name
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}