name: format

on:
  pull_request:
  push:
    branches: [main]

jobs:
  check:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v4

    - name: Install clang-format
      run: |
        wget -qO - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/llvm.asc
        echo "deb http://apt.llvm.org/noble/ llvm-toolchain-noble-20 main" | sudo tee /etc/apt/sources.list.d/llvm20.list
        echo "deb-src http://apt.llvm.org/noble/ llvm-toolchain-noble-20 main" | sudo tee -a /etc/apt/sources.list.d/llvm20.list
        sudo apt-get update && sudo apt-get install -y clang-format-20
        clang-format-20 --version

    - name: Run clang-format check
      run: |
        FILES=$(find ./ -type f | grep -P '^\.\/(src|include)(\/[^\/]+)*\/[^\/]+\.(h|cpp|cc)$')

        UNFORMATTED=$(clang-format-20 --dry-run --Werror $FILES)

        if [ $? -ne 0 ]; then
          echo "× Some files are not properly formatted. Run clang-format to fix them."
          exit 1
        else
          echo "✓ All files are properly formatted."
        fi