.travis.yml

language: cpp
matrix:
  include:
    - os: linux
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-7
      env:
        - MATRIX_EVAL="CC=gcc-7 && CXX=g++-7"

before_install:
  - eval "${MATRIX_EVAL}"

install:
  - sudo apt-get install -qq g++-7
  - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 90

  # OpenCV dependencies - Details available at: http://docs.opencv.org/trunk/doc/tutorials/introduction/linux_install/linux_install.html
  - sudo apt-get install -y build-essential
  - sudo apt-get install -y cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
  - sudo apt-get install -y python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

  - git clone https://github.com/opencv/opencv.git
  - git clone https://github.com/opencv/opencv_contrib.git
  - cd opencv

  # Create a new 'build' folder.
  - mkdir build
  - cd build

  # Set build instructions for Ubuntu distro.
  - cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=OFF -D WITH_OPENGL=ON ..

  # Run 'make' with four threads.
  - make -j4

  # Install to OS.
  - sudo make install

  # Add configuration to OpenCV to tell it where the library files are located on the file system (/usr/local/lib)
  - sudo sh -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'

  - sudo ldconfig
  - echo "OpenCV installed."

  # We need to return to the repo "root" folder, so we can then 'cd' into the C++ project folder.
  - cd ../../
  
script:
  - mkdir -p build
  - cd build
  - cmake ..
  - make