########################### GTEST
# Enable ExternalProject CMake module
INCLUDE(ExternalProject)

# Set default ExternalProject root directory
set_directory_properties(PROPERTIES EP_PREFIX ${CMAKE_BINARY_DIR}/third_party)

# Add gtest
# http://stackoverflow.com/questions/9689183/cmake-googletest
externalproject_add(
    googletest
    URL https://github.com/google/googletest/archive/refs/tags/release-1.11.0.tar.gz
    BUILD_BYPRODUCTS third_party/src/googletest-build/lib/libgtest.a
    # Disable install step
    INSTALL_COMMAND ""
    # Wrap download, configure and build steps in a script to log output
    LOG_DOWNLOAD ON
    LOG_CONFIGURE ON
    LOG_BUILD ON)

# Specify include dir
externalproject_get_property(googletest source_dir)
set(GTEST_INCLUDE_DIRS ${source_dir}/googletest/include)

# Library
externalproject_get_property(googletest binary_dir)
set(GTEST_LIBRARIES ${binary_dir}/lib/${CMAKE_FIND_LIBRARY_PREFIXES}gtest.a)
add_library(GTest::GTest UNKNOWN IMPORTED)
file(MAKE_DIRECTORY ${GTEST_INCLUDE_DIRS})
set_target_properties(GTest::GTest PROPERTIES
                      IMPORTED_LOCATION  ${GTEST_LIBRARIES}
                      INTERFACE_INCLUDE_DIRECTORIES ${GTEST_INCLUDE_DIRS}
                      INTERFACE_LINK_LIBRARIES Threads::Threads)
set_property(TARGET googletest PROPERTY EXCLUDE_FROM_ALL 1)
add_dependencies(GTest::GTest googletest)