name: Compiler testing

on:
  pull_request:
    branches:
    - master
  push:
    branches:
    - master

jobs:
  pre_job:
    runs-on: ubuntu-latest
    outputs:
      should_skip: ${{ steps.skip_check.outputs.should_skip }}
    steps:
      - id: skip_check
        uses: fkirc/skip-duplicate-actions@v5
        with:
          paths_ignore: '["**/README.md", "docs/**", "guidelines/**"]'
          # cancel previous builds if a new commit is pushed
          cancel_others: 'true'
          # only run on push *or* pull_request, not both
          concurrent_skipping: 'same_content_newer'

  test-compile:
    runs-on: ${{ matrix.os }}
    needs: pre_job
    if: needs.pre_job.outputs.should_skip != 'true'
    env:
      CC: ${{ matrix.compiler }}
      CXX: ${{ matrix.compiler }}
      CXXSTD: ${{ matrix.cpp_std }}
    strategy:
      matrix:
        os:
          - ubuntu-20.04
        compiler:
          - 'clang-12'
          - 'gcc-11'
        cpp_std:
          - 'c++11'
          - 'c++14'
          - 'c++17'
          - 'c++20'
        include:
          # Add os_name
          - os: ubuntu-20.04
            os_name: focal
          # macOS builds
          - os: macos-13
            compiler: 'clang'
            cpp_std: 'c++11'
          - os: macos-13
            compiler: 'clang'
            cpp_std: 'c++17'
          # Limited testing for older compilers
          - os: ubuntu-20.04
            os_name: focal
            compiler: 'clang-11'
            cpp_std: 'c++11'
          - os: ubuntu-20.04
            os_name: focal
            compiler: 'gcc-10'
            cpp_std: 'c++11'
      fail-fast: false
    steps:
      - name: Install Linux Dependencies
        if: runner.os == 'Linux'
        shell: bash
        run: |
          sudo apt-get update
          sudo apt-get install gperf build-essential bison flex libreadline-dev gawk tcl-dev libffi-dev git graphviz xdot pkg-config python python3 libboost-system-dev libboost-python-dev libboost-filesystem-dev zlib1g-dev

      - name: Install macOS Dependencies
        if: runner.os == 'macOS'
        run: |
          brew install bison flex gawk libffi pkg-config bash

      - name: Setup GCC
        if: startsWith(matrix.compiler, 'gcc')
        shell: bash
        run: |
          CXX=${CC/#gcc/g++}
          sudo apt-add-repository ppa:ubuntu-toolchain-r/test
          sudo apt-get update
          sudo apt-get install $CC $CXX
          echo "CXX=$CXX" >> $GITHUB_ENV
          echo "CXXFLAGS=-Wp,-D_GLIBCXX_ASSERTIONS" >> $GITHUB_ENV

      - name: Setup Clang
        if: startsWith(matrix.compiler, 'clang') && (matrix.compiler != 'clang')
        shell: bash
        run: |
          wget https://apt.llvm.org/llvm-snapshot.gpg.key
          sudo apt-key add llvm-snapshot.gpg.key
          rm llvm-snapshot.gpg.key
          sudo apt-add-repository "deb https://apt.llvm.org/${{ matrix.os_name }}/ llvm-toolchain-${{ matrix.os_name }} main"
          sudo apt-get update
          CXX=${CC/#clang/clang++}
          sudo apt-get install $CC $CXX
          echo "CXX=$CXX" >> $GITHUB_ENV

      - name: Linux runtime environment
        if: runner.os == 'Linux'
        shell: bash
        run: |
          echo "${{ github.workspace }}/.local/bin" >> $GITHUB_PATH
          echo "procs=$(nproc)" >> $GITHUB_ENV

      - name: macOS runtime environment
        if: runner.os == 'macOS'
        shell: bash
        run: |
          echo "${{ github.workspace }}/.local/bin" >> $GITHUB_PATH
          echo "$(brew --prefix bison)/bin" >> $GITHUB_PATH
          echo "$(brew --prefix flex)/bin" >> $GITHUB_PATH
          echo "procs=$(sysctl -n hw.ncpu)" >> $GITHUB_ENV

      - name: Tool versions
        shell: bash
        run: |
          $CC --version
          $CXX --version

      - name: Checkout Yosys
        uses: actions/checkout@v4

      - name: Build
        shell: bash
        run: |
          make config-${CC%%-*}
          make -j$procs CXXSTD=$CXXSTD CC=$CC CXX=$CXX LD=$CC

      - name: Log yosys-config output
        run: |
          ./yosys-config || true