pr-code-format.yml

name: "Check code formatting"

permissions:
  contents: read

on:
  pull_request:
    branches:
      - master

jobs:
  code_formatter:
    runs-on: ubuntu-latest
    timeout-minutes: 10

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install clang-format
        run:
          echo "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-18 main" | sudo tee -a /etc/apt/sources.list && \
          sudo apt update && sudo apt install wget && wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add - && \
          sudo apt update && sudo apt install -y --no-install-recommends clang-format-18.1.8*

      - name: Run clang-format on changed files
        run: |
          # Get list of changed files
          CHANGED_FILES=$(git diff --name-only --diff-filter=ACM origin/master...HEAD --)
          CHANGED_CPP_FILES=$(echo "$CHANGED_FILES" | grep -E '^(runtime-light|runtime-common)/.*\.(cpp|h|inl)$')
          
          # Apply clang-format to each changed source file
          echo "$CHANGED_CPP_FILES" | xargs -r clang-format-18 -i

      - name: Check for formatting changes
        run: |
          # Check if any files were modified by clang-format
          git diff --exit-code
          if [ $? -ne 0 ]; then
              echo "Code is not formatted. Please run clang-format."
              exit 1
          fi