flake8.yml

name: Flake8
# pull requests:
#      run on pull_request_target instead of just pull_request as we need write access to update the status check
on:
  workflow_dispatch:
  pull_request_target:
  push:

jobs:
  flake8-your-pr:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        if: github.event_name == 'pull_request' || github.event_name == 'pull_request_target'
        uses: actions/checkout@v2
        # by default the pull_requst_target event checks out the base branch, i.e. dev
        # so we need to explicitly checkout the head of the PR
        # we use fetch-depth 0 to make sure the full history is checked out and we can compare against
        # the base commit (branch) of the PR
        # more info https://github.community/t/github-actions-are-severely-limited-on-prs/18179/16
        # we checkout merge_commit here as this contains all new code from dev also. we don't need to compare against base_commit
        with:
          fetch-depth: 0
          ref: refs/pull/${{ github.event.pull_request.number }}/merge
          # repository: ${{github.event.pull_request.head.repo.full_name}}

      - name: Checkout
        # for non PR runs we just checkout the default, which is a sha on a branch probably
        if: github.event_name != 'pull_request' && github.event_name != 'pull_request_target'
        uses: actions/checkout@v2

      # - uses: tayfun/flake8-your-pr@master
      - uses: valentijnscholten/flake8-your-pr@master
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"