# Optimize git clone
git:
    depth: 5

# No need for sudo
sudo: false

# Use linux unless specified otherwise
os: linux

# Bionic is the most recent version of Ubuntu I can get to work properly
dist: bionic

# Enable C++ language support
language: cpp

# Cache compiled object files with ccache
cache: ccache

# Matrix for configuring all the build configurations
matrix:
    include:
        # Clang on OSX
        - env: COMPILER=clang++ BUILD_TYPE=Debug
          os: osx
          osx_image: xcode11.2
          compiler: clang
          name: OSX Clang Debug

        - env: COMPILER=clang++ BUILD_TYPE=Release
          os: osx
          osx_image: xcode11.2
          compiler: clang
          name: OSX Clang Release

        # TODO add gcc from https://docs.travis-ci.com/user/languages/cpp/#gcc-on-macos

        # Clang on Linux
        - env: COMPILER=clang++-9 BUILD_TYPE=Debug
          addons: &clang80
            apt:
                packages:
                    - clang-9
                sources:
                    - sourceline: 'ppa:ubuntu-toolchain-r/test'
                    - sourceline: 'deb https://apt.llvm.org/bionic/ llvm-toolchain-bionic-9 main'
                      key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
          name: Linux Clang Debug

        - env: COMPILER=clang++-9 BUILD_TYPE=Release
          addons: *clang80
          name: Linux Clang Release

        # GCC on Linux
        - env: COMPILER=g++-9 BUILD_TYPE=Debug
          addons: &gcc9
            apt:
                packages:
                    - g++-9
                sources:
                    - ubuntu-toolchain-r-test
          name: Linux GCC Debug

        - env: COMPILER=g++-9 BUILD_TYPE=Release
          addons: *gcc9
          name: Linux GCC Release

before_install:
    # Display available disk space
    - df -h

    # Display Travis OS name
    - echo $TRAVIS_OS_NAME

    # Display build type
    - echo $BUILD_TYPE

install:
    # Set ${CXX} properly
    - export CXX=${COMPILER}

    # Display compiler version
    - ${CXX} --version

    # Get number of cores (or 2 by default if somehow none of these are available somehow)
    - JOBS=$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null || echo 2)
    - echo $JOBS

    # Recommanded build directory
    - CMAKE_BUILD_DIR=build

    # Install ccache on OSX
    - |
      if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then
          # This is OSX
          brew install ccache || brew upgrade cmake
          export PATH="/usr/local/opt/ccache/libexec:$PATH"
      fi

    # Install required libraries
    - mkdir travisLibs && cd travisLibs

    # Install modern CMake
    - CMAKE_VERSION=3.14.5
    - |
      if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
          # This is Linux
          CMAKE_URL="https://cmake.org/files/v${CMAKE_VERSION%.[0-9]}/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz"
          CMAKE_DIR=cmakeDownload
          mkdir ${CMAKE_DIR} && travis_retry wget --no-check-certificate -O - ${CMAKE_URL} | tar --strip-components=1 -xz -C ${CMAKE_DIR}
          export PATH=${PWD}/${CMAKE_DIR}/bin:${PATH}
      else
          # This is OSX
          brew install cmake || brew upgrade cmake
      fi

    # Display CMake version
    - cmake --version

    # Install modern SDL2
    - SDL2_VERSION=2.0.10
    - |
      travis_retry curl -L https://www.libsdl.org/release/SDL2-${SDL2_VERSION}.tar.gz | tar xz
      cd SDL2-${SDL2_VERSION}
      ./configure
      make -j ${JOBS}
      sudo make install -j ${JOBS}
      cd ..

    # Finished installing required libraries
    - cd ..

before_script:
    # Make build directory and generate CMake build files
    - mkdir -p ${CMAKE_BUILD_DIR} && cd ${CMAKE_BUILD_DIR}
    - cmake .. -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DFIX_BUGS=ON -DWARNINGS=ON -DALL_WARNINGS=ON

script:
    # CMake build
    - cmake --build . --config ${BUILD_TYPE} --parallel ${JOBS}

    # Make build
    - cd ..
    - make -j ${JOBS} FIX_BUGS=1 RELEASE=1 WARNINGS=1 ALL_WARNINGS=1
    - cd ${CMAKE_BUILD_DIR}