AtomicGameEngine/Build/CMake/Modules/AtomicGit.cmake

# If submodules aren't initialized, look for git and initialize
if (NOT EXISTS ${CMAKE_SOURCE_DIR}/Submodules/CEF/.git OR NOT EXISTS ${CMAKE_SOURCE_DIR}/Submodules/AtomicExamples/.git)

    find_package(Git)

    if(GIT_FOUND)

        message ("\n\nUpdating submodules, please wait...\n\n")

        execute_process( COMMAND ${GIT_EXECUTABLE} submodule update --init
                         WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
                         RESULT_VARIABLE ATOMIC_GIT_STATUS )

        # check return status
        if(NOT ATOMIC_GIT_STATUS EQUAL 0)
            message( FATAL_ERROR "BUILD ERROR:\n\nError initializing submodules: git submodule update --init returned ${ATOMIC_GIT_STATUS}\n")
        endif()

    else()

        # Git not found
        message( FATAL_ERROR "BUILD ERROR:\n\Submodules not initialized, please run: git submodule update --init\n")

    endif()

endif()