name: clang-format

on:
  push:
    branches: [ master, development, pull-request/* ]
  pull_request:
    branches: [ master, development, pull-request/* ]
    types: [opened, synchronize, reopened]

jobs:
  clang-format:
    name: clang-format
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install clang-format and git
        run: |
          sudo apt-get update
          sudo apt-get install -y --no-install-recommends git clang-format
          clang-format --version

      - name: Run clang-format on added/changed files
        run: |
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            BEFORE="origin/${{ github.base_ref }}"
          elif [ "${{ github.event_name }}" = "push" ]; then
            BEFORE="${{ github.event.before }}"
          else
            echo "Unsupported event: ${{ github.event_name }}"
            echo "This is likely a bug in the workflow configuration. Please report it to the maintainers."
            exit 1
          fi

          git diff --name-only -z --diff-filter=AMCR "$BEFORE"..HEAD -- \
            '*.c' '*.cc' '*.cxx' '*.cpp' \
            '*.h' '*.hh' '*.hpp' '*.hxx' \
            '*.ipp' '*.inl' \
            ':(exclude)include/etl/generators/*' \
            ':(exclude)include/etl/private/*_cpp03.h' \
            | xargs -0 --no-run-if-empty clang-format --Werror -n --style=file