language:
  - cpp
dist: trusty
compiler:
  - g++

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}"
  - sudo apt-get update
  - sudo apt-get update -qq

install:

# OpenCV v3.0.0 install code (modified from orignal source: https://github.com/jayrambhia/Install-OpenCV)

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

  # Download v3.0.0 .zip file and extract.
  - curl -sL https://github.com/opencv/opencv/archive/4.3.0.zip > opencv.zip
  - unzip opencv.zip
  - cd opencv-4.3.0
  
  # 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 WITH_V4L=ON \
          -D BUILD_JAVA=OFF -D BUILD_opencv_java_bindings_generator=OFF -D BUILD_opencv_js=OFF\
          -D INSTALL_C_EXAMPLES=OFF -D BUILD_EXAMPLES=OFF \
          -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D INSTALL_TESTS=OFF \
          -D WITH_QT=OFF \
          -D WITH_OPENGL=OFF \
          -D BUILD_opencv_apps=OFF \
          -D BUILD_opencv_python3=OFF -D BUILD_opencv_python_tests=OFF -D INSTALL_PYTHON_EXAMPLES=OFF -D BUILD_NEW_PYTHON_SUPPORT=OFF -D BUILD_opencv_python_bindings_generator=OFF \
          -D CPU_BASELINE=AVX2 -D CPU_DISPATCH=AVX2 ..

  
  # 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:
  - cmake .
  - make -j4