clang-format.yaml

name: Clang format
on: [push, pull_request]
jobs:
  pre_job:
    name: Prerequisite checks
    runs-on: ubuntu-latest
    outputs:
      should_skip: ${{ steps.skip_check.outputs.should_skip }}
    steps:
      - id: skip_check
        uses: fkirc/skip-duplicate-actions@master
        with:
          concurrent_skipping: 'same_content'
          cancel_others: 'true'
  clang-format-pull:
    name: Clang Format
    needs: pre_job
    if: "needs.pre_job.outputs.should_skip != 'true'"
    runs-on: ubuntu-latest
    steps:
    - name: Define variables
      run: |
        echo "BASE=$(\
          if [[ ${{ github.event_name }} = 'pull_request' ]]; then \
            echo 'origin/${{ github.base_ref }}'; \
          else \
            echo '${{ github.event.before }}'; \
          fi)" \
        >> $GITHUB_ENV
    - uses: actions/checkout@v3
    - name: Install clang-format
      run: sudo apt-get install clang-format
    - name: Download git-clang-format
      run: wget https://raw.githubusercontent.com/llvm-mirror/clang/master/tools/clang-format/git-clang-format
    - name: Install git-clang-format
      run: sudo install -t /bin git-clang-format
    - name: Fetch origin
      run: git fetch origin
    - name: clang-format
      run: git clang-format ${{ env.BASE }}
    - name: diff
      run: git diff --exit-code