cmake_minimum_required(VERSION 3.25.1 FATAL_ERROR)

project(CMAKEEXAMPLE VERSION 1.0)

include(CTest)

include(GNUInstallDirs)

set(CMAKE_CXX_STANDARD 20)

set(CMAKE_CXX_STANDARD_REQUIRED True)

set(DOWNLOAD_3rdPARTY_LIBS ${CMAKE_SOURCE_DIR}/libs3rdParty/download)

set(BUILD_3rdPARTY_LIBS ${CMAKE_SOURCE_DIR}/libs3rdParty/build)

set(INSTALL_3rdPARTY_LIBS ${CMAKE_SOURCE_DIR}/libs3rdParty/install)

set(RAPIDCSV rapidcsv_FilterSort)

set(CXXARGsOPTS cxxopts)

set(CPPPROPERTIES cppproperties_RecVar)

set(GOOGLETEST googletest)

# The way that CLion manages multiple configurations, it causes a copy of

# the CMakeCache.txt to be copied across due to it not expecting there to

# be a project within a project. This causes the hard-coded paths in the

# cache to be copied and builds to fail. To mitigate this, we simply

# remove the cache if it exists before we configure the new project. It

# is safe to do so because it will be re-generated. Since this is only

# executed at the configure step, it should not cause additional builds or

# downloads.

file(REMOVE "${DOWNLOAD_3rdPARTY_LIBS}/CMakeCache.txt")

# Create and build a separate CMake project to carry out the download.

# If we've already previously done these steps, they will not cause

# anything to be updated, so extra rebuilds of the project won't occur.

# Make sure to pass through CMAKE_MAKE_PROGRAM in case the main project

# has this set to something not findable on the PATH.

configure_file("${CMAKE_CURRENT_LIST_DIR}/DependenciesBuild.cmake.in"

"${DOWNLOAD_3rdPARTY_LIBS}/CMakeLists.txt"

@ONLY

)

execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"

-D "CMAKE_MAKE_PROGRAM:FILE=${CMAKE_MAKE_PROGRAM}"

.

RESULT_VARIABLE result

#${OUTPUT_QUIET}

WORKING_DIRECTORY "${DOWNLOAD_3rdPARTY_LIBS}"

)

if(result)

message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${result}")

endif()

execute_process(COMMAND ${CMAKE_COMMAND} --build .

RESULT_VARIABLE result

#${OUTPUT_QUIET}

WORKING_DIRECTORY "${DOWNLOAD_3rdPARTY_LIBS}"

)

if(result)

message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${result}")

endif()

set(cxxopts_DIR ${INSTALL_3rdPARTY_LIBS}/lib/cmake/cxxopts)

find_package(cxxopts 3.0.0 REQUIRED)

set(cppproperties_DIR ${INSTALL_3rdPARTY_LIBS}/lib/cmake/cppproperties)

find_package(cppproperties 2.0.01.0 REQUIRED)

add_executable(cmakeExampleExternalProjectAdd main.cxx)

add_library(rapidcsv INTERFACE IMPORTED)

add_library(cxxopts INTERFACE IMPORTED)

set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)

add_subdirectory(${DOWNLOAD_3rdPARTY_LIBS}/${GOOGLETEST} ${BUILD_3rdPARTY_LIBS}/${GOOGLETEST})

add_dependencies(cmakeExampleExternalProjectAdd rapidcsv cxxopts cppproperties)

target_include_directories(cmakeExampleExternalProjectAdd

PUBLIC ${PROJECT_BINARY_DIR}

PRIVATE ${INSTALL_3rdPARTY_LIBS}/include

)

target_link_directories(cmakeExampleExternalProjectAdd PRIVATE ${INSTALL_3rdPARTY_LIBS}/lib)

target_link_libraries(cmakeExampleExternalProjectAdd INTERFACE rapidcsv cxxopts)

target_link_libraries(cmakeExampleExternalProjectAdd PRIVATE cppproperties gtest gmock_main)

install(TARGETS cmakeExampleExternalProjectAdd DESTINATION bin)

add_test(NAME example_test COMMAND cmakeExampleExternalProjectAdd --propfilename=${CMAKE_CURRENT_LIST_DIR}/property/test1.txt)