name: Checkpatch

on:
  pull_request:
    types: [opened, synchronize, reopened]

jobs:
  checkpatch:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      with:
        fetch-depth: 0
    - name: Install dependencies
      run: |
        sudo apt-get update
        sudo apt-get install -y perl
    - name: Run checkpatch.pl
      run: |
        git fetch origin ${{ github.base_ref }}
        base_commit=$(git merge-base FETCH_HEAD ${{ github.event.pull_request.head.sha }})
        ./checkpatch.pl --no-tree -g $base_commit