#########################
# project configuration #
#########################

# C++ project
language: cpp

dist: trusty
sudo: required
group: edge

matrix:
  include:
  - os: linux
    compiler: gcc
    env: COMPILER=g++-4.9
    addons:
      apt:
        sources: ['ubuntu-toolchain-r-test']
        packages: ['g++-4.9', 'ninja-build']

  - os: linux
    compiler: gcc
    env: COMPILER=g++-5
    addons:
      apt:
        sources: ['ubuntu-toolchain-r-test']
        packages: ['g++-5', 'ninja-build']

  - os: linux
    compiler: gcc
    env: COMPILER=g++-6
    addons:
      apt:
        sources: ['ubuntu-toolchain-r-test']
        packages: ['g++-6', 'ninja-build']

  - os: linux
    compiler: gcc
    env: COMPILER=g++-7
    addons:
      apt:
        sources: ['ubuntu-toolchain-r-test']
        packages: ['g++-7', 'ninja-build']

script:
  # get CMake and Ninja (only for systems with brew - macOS)
  - |
     if [[ (-x $(which brew)) ]]; then
       brew update
       brew install cmake ninja
       brew upgrade cmake
     fi
  # make sure CXX is correctly set
  - if [[ "${COMPILER}" != "" ]]; then export CXX=${COMPILER}; fi

  # show OS/compiler version
  - uname -a
  - cmake --version
  - $CXX --version

  # put json.hpp to nlohmann
  - mkdir -p nlohmann && wget https://github.com/nlohmann/json/releases/download/v3.5.0/json.hpp -O nlohmann/json.hpp

  # compile and execute unit tests
  - mkdir -p build && cd build
  - cmake .. -DNLOHMANN_JSON_DIR=.. ${CMAKE_OPTIONS} -GNinja && cmake --build . --config Release
  - ctest -C Release -V -j
  - cd ..