language: generic

dist: trusty
sudo: required

env:
  global:
    - DEPENDENCY_DIR="${TRAVIS_BUILD_DIR}/dependencies"

cache:
  directories:
    - ${DEPENDENCY_DIR}


matrix:
    include:
    - env: CXX=g++-7 CC=gcc-7
      addons:
        apt:
          packages:
            - g++-7
          sources: &sources
            - ubuntu-toolchain-r-test
            - llvm-toolchain-trusty
            - llvm-toolchain-trusty-3.9
            - llvm-toolchain-trusty-4.0
            - llvm-toolchain-trusty-5.0
    - env: CXX=g++-6 CC=gcc-6
      addons:
        apt:
          packages:
            - g++-6
          sources: *sources
    - env: CXX=g++-5 CC=gcc-5
      addons:
        apt:
          packages:
            - g++-5
          sources: *sources
    - env: CXX=clang++-5.0 CC=clang-5.0
      addons:
        apt:
          packages:
            - clang-5.0
            - libc++-dev
          sources: *sources
    - env: CXX=clang++-4.0 CC=clang-4.0
      addons:
        apt:
          packages:
            - clang-4.0
            - libc++-dev
          sources: *sources
    - env: CXX=clang++-3.9 CC=clang-3.9
      addons:
        apt:
          packages:
            - clang-3.9
            - libc++-dev
          sources: *sources

install:
    - mkdir -p "${DEPENDENCY_DIR}" && cd "${DEPENDENCY_DIR}"
    - |
        if [[ ! -d "$(ls -A ${DEPENDENCY_DIR}/cmake)" ]]; then
          CMAKE_URL="https://cmake.org/files/v3.6/cmake-3.8.2-Linux-x86_64.tar.gz"
          mkdir -p cmake && travis_retry wget --no-check-certificate --quiet -O - "${CMAKE_URL}" | tar --strip-components=1 -xz -C cmake
        fi
        export PATH="${DEPENDENCY_DIR}/cmake/bin:${PATH}"


script:
    - script/ci_build.sh