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set(JSON_TEST_DATA_URL https://github.com/nlohmann/json_test_data)
set(JSON_TEST_DATA_VERSION 3.1.0)
include(ExternalProject)
# if variable is set, use test data from given directory rather than downloading them
if(JSON_TestDataDirectory)
message(STATUS "Using test data in ${JSON_TestDataDirectory}.")
add_custom_target(download_test_data)
file(WRITE ${CMAKE_BINARY_DIR}/include/test_data.hpp "#define TEST_DATA_DIRECTORY \"${JSON_TestDataDirectory}\"\n")
else()
# create a header with the path to the downloaded test data
file(WRITE ${CMAKE_BINARY_DIR}/include/test_data.hpp "#define TEST_DATA_DIRECTORY \"${CMAKE_BINARY_DIR}/test_files\"\n")
# download test data from GitHub release
ExternalProject_Add(download_test_data_project
URL "${JSON_TEST_DATA_URL}/archive/refs/tags/v${JSON_TEST_DATA_VERSION}.zip"
SOURCE_DIR "${CMAKE_BINARY_DIR}/test_files"
CONFIGURE_COMMAND ""
BUILD_COMMAND ""
INSTALL_COMMAND ""
LOG_DOWNLOAD TRUE
DOWNLOAD_EXTRACT_TIMESTAMP TRUE
EXCLUDE_FROM_ALL TRUE
)
# target to download test data
add_custom_target(download_test_data
DEPENDS download_test_data_project
)
endif()
# determine the operating system (for debug and support purposes)
find_program(UNAME_COMMAND uname)
find_program(VER_COMMAND ver)
find_program(LSB_RELEASE_COMMAND lsb_release)
find_program(SW_VERS_COMMAND sw_vers)
set(OS_VERSION_STRINGS "${CMAKE_SYSTEM}")
if (VER_COMMAND)
execute_process(COMMAND ${VER_COMMAND} OUTPUT_VARIABLE VER_COMMAND_RESULT OUTPUT_STRIP_TRAILING_WHITESPACE)
set(OS_VERSION_STRINGS "${OS_VERSION_STRINGS}; ${VER_COMMAND_RESULT}")
endif()
if (SW_VERS_COMMAND)
execute_process(COMMAND ${SW_VERS_COMMAND} OUTPUT_VARIABLE SW_VERS_COMMAND_RESULT OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)
string(REGEX REPLACE "[ ]*\n" "; " SW_VERS_COMMAND_RESULT "${SW_VERS_COMMAND_RESULT}")
set(OS_VERSION_STRINGS "${OS_VERSION_STRINGS}; ${SW_VERS_COMMAND_RESULT}")
endif()
if (LSB_RELEASE_COMMAND)
execute_process(COMMAND ${LSB_RELEASE_COMMAND} -a OUTPUT_VARIABLE LSB_RELEASE_COMMAND_RESULT OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)
string(REGEX REPLACE "[ ]*\n" "; " LSB_RELEASE_COMMAND_RESULT "${LSB_RELEASE_COMMAND_RESULT}")
set(OS_VERSION_STRINGS "${OS_VERSION_STRINGS}; ${LSB_RELEASE_COMMAND_RESULT}")
endif()
if (UNAME_COMMAND)
execute_process(COMMAND ${UNAME_COMMAND} -a OUTPUT_VARIABLE UNAME_COMMAND_RESULT OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)
set(OS_VERSION_STRINGS "${OS_VERSION_STRINGS}; ${UNAME_COMMAND_RESULT}")
endif()
message(STATUS "Operating system: ${OS_VERSION_STRINGS}")
# determine the compiler (for debug and support purposes)
if (MSVC)
execute_process(COMMAND ${CMAKE_CXX_COMPILER} OUTPUT_VARIABLE CXX_VERSION_RESULT OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_VARIABLE CXX_VERSION_RESULT ERROR_STRIP_TRAILING_WHITESPACE)
set(CXX_VERSION_RESULT "${CXX_VERSION_RESULT}; MSVC_VERSION=${MSVC_VERSION}; MSVC_TOOLSET_VERSION=${MSVC_TOOLSET_VERSION}")
else()
execute_process(COMMAND ${CMAKE_CXX_COMPILER} --version OUTPUT_VARIABLE CXX_VERSION_RESULT OUTPUT_STRIP_TRAILING_WHITESPACE)
endif()
string(REGEX REPLACE "[ ]*\n" "; " CXX_VERSION_RESULT "${CXX_VERSION_RESULT}")
message(STATUS "Compiler: ${CXX_VERSION_RESULT}")
# determine used C++ standard library (for debug and support purposes)
if(CMAKE_CROSSCOMPILING)
set(LIBCPP_VERSION_OUTPUT_CACHED "could not be detected due to cross-compiling" CACHE STRING "Detected C++ standard library version")
endif()
if(NOT DEFINED LIBCPP_VERSION_OUTPUT_CACHED)
try_run(RUN_RESULT_VAR COMPILE_RESULT_VAR
"${CMAKE_BINARY_DIR}" SOURCES "${CMAKE_SOURCE_DIR}/cmake/detect_libcpp_version.cpp"
RUN_OUTPUT_VARIABLE LIBCPP_VERSION_OUTPUT
COMPILE_OUTPUT_VARIABLE LIBCPP_VERSION_COMPILE_OUTPUT
)
if(NOT LIBCPP_VERSION_OUTPUT)
set(LIBCPP_VERSION_OUTPUT "Unknown")
message(AUTHOR_WARNING "Failed to compile cmake/detect_libcpp_version to detect the used C++ standard library. This does not affect the library or the test cases. Please still create an issue at https://github.com/nlohmann/json to investigate this.\n${LIBCPP_VERSION_COMPILE_OUTPUT}")
endif()
set(LIBCPP_VERSION_OUTPUT_CACHED "${LIBCPP_VERSION_OUTPUT}" CACHE STRING "Detected C++ standard library version")
endif()
message(STATUS "C++ standard library: ${LIBCPP_VERSION_OUTPUT_CACHED}")
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