check-trailing-spaces.yml

name: Check Trailing Spaces

on:
  pull_request:
    branches:
      - main
      - ArduSub*
      - BlueOS*
      - Cockpit*
      - Companion*
      - QGroundControl*

jobs:
  trailing-spaces-check:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout Code
      uses: actions/checkout@v3

    - name: Check Trailing Spaces
      run: |
        git fetch origin ${{ github.base_ref }}
        PR_FILES_CHANGED=$(git diff --name-only origin/${{ github.base_ref }})
        for FILE in $PR_FILES_CHANGED; do
          if [[ $FILE == *.md ]]; then
            echo "Checking file $FILE"
            git diff FETCH_HEAD..HEAD -- $FILE | grep -P '^\+' | grep -P '\s+$' && \
              echo "Trailing spaces found in $FILE" && exit 1 || :;
          fi
        done