# Build Configuration for Travis CI
# https://travis-ci.org

dist: trusty
sudo: required
language: cpp

matrix:
  # Show final status immediately if a test fails.
  fast_finish: true
  allow_failures:
    - env: CHECK_COMMIT_FORMAT=ON
  include:
    # Linux GCC debug build.
    - os: linux
      compiler: gcc
      env: VULKAN_BUILD_TARGET=LINUX
    # Linux clang debug build.
    - os: linux
      compiler: clang
      env: VULKAN_BUILD_TARGET=LINUX
    # MacOS clang debug build.
    - os: osx
      compiler: clang
      env: VULKAN_BUILD_TARGET=MACOS
    # Check for proper clang formatting in the pull request.
    - env: CHECK_FORMAT=ON
    # Check for proper commit message formatting for commits in PR
    - env: CHECK_COMMIT_FORMAT=ON

cache: ccache

# Use set -e so that the build fails when a command fails.
# Note that set +e must be called at the end or else failures may occur within Travis
# The default action for Travis-CI is to continue running even if a command fails.
# See https://github.com/travis-ci/travis-ci/issues/1066.
# Use the YAML block scalar header (|) to allow easier multiline script coding.

before_install:
  - set -e
  - unset -f cd pushd popd
  - |
    if [[ "$VULKAN_BUILD_TARGET" == "LINUX" ]]; then
      # Install the appropriate Linux packages.
      sudo apt-get -qq update
      sudo apt-get -y install libxkbcommon-dev libwayland-dev libmirclient-dev libxrandr-dev libx11-xcb-dev
    fi
  - |
    if [[ "$VULKAN_BUILD_TARGET" == "MACOS" ]]; then
      # Install the appropriate MacOS packages
      brew upgrade python3
    fi
  - |
    if [[ "$VULKAN_BUILD_TARGET" == "LINUX" ]] || [[ "$VULKAN_BUILD_TARGET" == "MACOS" ]]; then
      # Install Vulkan-Headers
      mkdir /tmp/headers
      git clone https://github.com/KhronosGroup/Vulkan-Headers.git /tmp/headers/repo
      pushd /tmp/headers/repo
      cmake . -DCMAKE_INSTALL_PREFIX=/tmp/headers/install
      cmake --build . --target install
      popd
      # Get Google Test
      git clone https://github.com/google/googletest.git external/googletest
    fi
  - |
    if [[ "$CHECK_FORMAT" == "ON" && "$TRAVIS_PULL_REQUEST" != "false" ]]; then
      # Install the clang format diff tool, but only for pull requests.
      curl -L http://llvm.org/svn/llvm-project/cfe/trunk/tools/clang-format/clang-format-diff.py -o scripts/clang-format-diff.py;
    fi
  # Misc setup
  - |
  - export core_count=$(nproc || echo 4) && echo core_count = $core_count
  - set +e

# It is important to use `unset -f cd` on MacOS because RVM overrides it, which causes conflicts with `set -e`

script:
  - set -e
  - |
    if [[ "$VULKAN_BUILD_TARGET" == "LINUX" ]] || [[ "$VULKAN_BUILD_TARGET" == "MACOS" ]]; then
      # Build Vulkan-Loader
      mkdir build
      cd build
      cmake -DCMAKE_BUILD_TYPE=Debug -DVULKAN_HEADERS_INSTALL_DIR=/tmp/headers/install ..
      make -j $core_count
      cd ..
    fi
  - |
    if [[ "$CHECK_FORMAT" == "ON" ]]; then
      if [[ "$TRAVIS_PULL_REQUEST" != "false" ]]; then
        # Run the clang format check only for pull request builds because the
        # master branch is needed to do the git diff.
        echo "Checking clang-format between TRAVIS_BRANCH=$TRAVIS_BRANCH and TRAVIS_PULL_REQUEST_BRANCH=$TRAVIS_PULL_REQUEST_BRANCH"
        ./scripts/check_code_format.sh
      else
        echo "Skipping clang-format check since this is not a pull request."
      fi
    fi
  - |
    if [[ "$CHECK_COMMIT_FORMAT" == "ON" ]]; then
      if [[ "$TRAVIS_PULL_REQUEST" != "false" ]]; then
        echo "Checking commit message formats:  See CONTRIBUTING.md"
        ./scripts/check_commit_message_format.sh
      fi
    fi
  - set +e

notifications:
  email:
    recipients:
      - karl@lunarg.com
      - lenny@lunarg.com
    on_success: change
    on_failure: always