name: "Linter"

on:
  push:
    branches:
    - dev
    - stable
  pull_request:
    branches:
    - dev
    - stable

jobs:
  changes:
    runs-on: ubuntu-latest
    outputs:
      clang-format: ${{ steps.filter.outputs.clang-format }}
    steps:
    - uses: actions/checkout@v4
    - uses: dorny/paths-filter@v2
      id: filter
      with:
        filters: |
          clang-format:
            - '**.cpp'
            - '**.c'
            - '**.h'
            - '.github/workflows/linter.yml'
            - 'scripts/clang-format.py'
            - '_clang-format'

  clang-format:
    needs: changes
    runs-on: ubuntu-22.04
    if: ${{ needs.changes.outputs.clang-format == 'true' }}
    steps:
    - name: Checkout repository
      uses: actions/checkout@v4

    - name: Install wget, software-properties-common, lsb-release (dependencies of LLVM install script)
      run: sudo apt --assume-yes install wget software-properties-common lsb-release

    - name: Uninstall old conflicting packages
      run: sudo apt purge --assume-yes --auto-remove llvm python3-lldb-14 llvm-14

    - name: Install automatic LLVM 16
      run: wget https://apt.llvm.org/llvm.sh -O /tmp/llvm-install.sh; chmod +x /tmp/llvm-install.sh; sudo /tmp/llvm-install.sh 16

    - name: Install clang-format-16
      run: sudo apt --assume-yes install clang-format-16

    - name: Install gitpython
      run: sudo pip install gitpython

    - name: Run clang-format
      run: |
        sudo update-alternatives --install /usr/bin/clang-format clang-format /usr/bin/clang-format-16 160
        clang-format --version
        python scripts/clang-format.py --check --verbose