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# Copyright 2016 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set(GTEST_TARGET external.googletest)
set(GTEST_INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/${GTEST_TARGET})

set(GTEST_INCLUDE_DIRS ${GTEST_INSTALL_DIR}/include)
include_directories(${GTEST_INCLUDE_DIRS})

set(GTEST_LIBRARIES gtest gmock)
set(GTEST_MAIN_LIBRARIES gtest_main)
set(GTEST_BOTH_LIBRARIES ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES})

foreach(lib IN LISTS GTEST_BOTH_LIBRARIES)
  if (MSVC)
    if (CMAKE_BUILD_TYPE MATCHES Debug)
      set(LIB_PATH ${GTEST_INSTALL_DIR}/lib/${lib}d.lib)
    else()
      set(LIB_PATH ${GTEST_INSTALL_DIR}/lib/${lib}.lib)
    endif()
  else()
    set(LIB_PATH ${GTEST_INSTALL_DIR}/lib/lib${lib}.a)
  endif()
  list(APPEND GTEST_BUILD_BYPRODUCTS ${LIB_PATH})

  add_library(${lib} STATIC IMPORTED)
  set_property(TARGET ${lib} PROPERTY IMPORTED_LOCATION
               ${LIB_PATH})
  add_dependencies(${lib} ${GTEST_TARGET})
endforeach(lib)

include (ExternalProject)
ExternalProject_Add(${GTEST_TARGET}
    PREFIX ${GTEST_TARGET}
    GIT_REPOSITORY https://github.com/google/googletest.git
    GIT_TAG release-1.12.0
    UPDATE_COMMAND ""
    CMAKE_CACHE_ARGS -DCMAKE_C_COMPILER:FILEPATH=${CMAKE_C_COMPILER}
                     -DCMAKE_CXX_COMPILER:FILEPATH=${CMAKE_CXX_COMPILER}
    CMAKE_ARGS ${CMAKE_ARGS}
               -DCMAKE_INSTALL_PREFIX=${GTEST_INSTALL_DIR}
               -DCMAKE_INSTALL_LIBDIR=lib
    BUILD_BYPRODUCTS ${GTEST_BUILD_BYPRODUCTS}
)