name: Python CI

on: [pull_request]

jobs:
  build:
    name: ${{ matrix.name }} ${{ matrix.build_type }} Python ${{ matrix.python_version }}
    runs-on: ${{ matrix.os }}

    env:
      CTEST_OUTPUT_ON_FAILURE: ON
      CTEST_PARALLEL_LEVEL: 2
      CMAKE_BUILD_TYPE: ${{ matrix.build_type }}
      PYTHON_VERSION: ${{ matrix.python_version }}
    strategy:
      fail-fast: false
      matrix:
        # Github Actions requires a single row to be added to the build matrix.
        # See https://help.github.com/en/articles/workflow-syntax-for-github-actions.
        name: [
          ubuntu-18.04-gcc-5,
          # ubuntu-18.04-gcc-9,  # TODO Disabled for now because of timeouts
          ubuntu-18.04-clang-9,
          macOS-10.15-xcode-11.3.1,
          ubuntu-18.04-gcc-5-tbb,
        ]

        build_type: [Debug, Release]
        python_version: [3]
        include:
          - name: ubuntu-18.04-gcc-5
            os: ubuntu-18.04
            compiler: gcc
            version: "5"

          # TODO Disabled for now because of timeouts
          # - name: ubuntu-18.04-gcc-9
          #   os: ubuntu-18.04
          #   compiler: gcc
          #   version: "9"

          - name: ubuntu-18.04-clang-9
            os: ubuntu-18.04
            compiler: clang
            version: "9"

          - name: macOS-10.15-xcode-11.3.1
            os: macOS-10.15
            compiler: xcode
            version: "11.3.1"

          - name: ubuntu-18.04-gcc-5-tbb
            os: ubuntu-18.04
            compiler: gcc
            version: "5"
            flag: tbb

    steps:
      - name: Checkout
        uses: actions/checkout@master
      - name: Install (Linux)
        if: runner.os == 'Linux'
        run: |
          # LLVM 9 is not in Bionic's repositories so we add the official LLVM repository.
          if [ "${{ matrix.compiler }}" = "clang" ] && [ "${{ matrix.version }}" = "9" ]; then
            sudo add-apt-repository "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-9 main"
          fi
          sudo apt-get -y update
          
          sudo apt install cmake build-essential pkg-config libpython-dev python-numpy libboost-all-dev
          
          if [ "${{ matrix.compiler }}" = "gcc" ]; then
            sudo apt-get install -y g++-${{ matrix.version }} g++-${{ matrix.version }}-multilib
            echo "::set-env name=CC::gcc-${{ matrix.version }}"
            echo "::set-env name=CXX::g++-${{ matrix.version }}"
          else
            sudo apt-get install -y clang-${{ matrix.version }} g++-multilib
            echo "::set-env name=CC::clang-${{ matrix.version }}"
            echo "::set-env name=CXX::clang++-${{ matrix.version }}"
          fi
      - name: Install (macOS)
        if: runner.os == 'macOS'
        run: |
          brew install cmake ninja boost
          if [ "${{ matrix.compiler }}" = "gcc" ]; then
            brew install gcc@${{ matrix.version }}
            echo "::set-env name=CC::gcc-${{ matrix.version }}"
            echo "::set-env name=CXX::g++-${{ matrix.version }}"
          else
            sudo xcode-select -switch /Applications/Xcode_${{ matrix.version }}.app
            echo "::set-env name=CC::clang"
            echo "::set-env name=CXX::clang++"
          fi
      - name: Set GTSAM_WITH_TBB Flag
        if: matrix.flag == 'tbb'
        run: |
          echo "::set-env name=GTSAM_WITH_TBB::ON"
          echo "GTSAM Uses TBB"
      - name: Build (Linux)
        if: runner.os == 'Linux'
        run: |
          bash .github/scripts/python.sh
      - name: Build (macOS)
        if: runner.os == 'macOS'
        run: |
          bash .github/scripts/python.sh