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# - Try to find nlohmann_json
#
# The following variables are optionally searched for defaults
# nlohmann_json_ROOT_DIR: Base directory where all GLOG components are found
#
# The following are set after configuration is done:
# nlohmann_json_FOUND
# nlohmann_json_INCLUDE_DIRS
# nlohmann_json_LIBRARIES
include(FindPackageHandleStandardArgs)
# only look in default directories
set(nlohmann_json_INCLUDE_NAME "nlohmann/json.hpp")
find_path(nlohmann_json_INCLUDE_DIR
NAMES
nlohmann/json.hpp
PATHS /usr/local/include
/usr/include)
if (NOT nlohmann_json_INCLUDE_DIR)
set(nlohmann_json_INCLUDE_NAME "json.hpp")
find_path(
nlohmann_json_INCLUDE_DIR
NAMES "${nlohmann_json_INCLUDE_NAME}"
)
endif()
# Version detection. Unfortunately the header doesn't expose a proper version
# define.
if (nlohmann_json_INCLUDE_DIR AND nlohmann_json_INCLUDE_NAME)
file(READ "${nlohmann_json_INCLUDE_DIR}/${nlohmann_json_INCLUDE_NAME}" NL_HDR_TXT LIMIT 1000)
if (NL_HDR_TXT MATCHES "version ([0-9]+\.[0-9]+\.[0-9]+)")
set(nlohmann_json_VERSION "${CMAKE_MATCH_1}")
endif()
endif()
set(nlohmann_json_VERSION "${nlohmann_json_VERSION}" CACHE STRING "nlohmann header version")
# handle the QUIETLY and REQUIRED arguments and set nlohmann_json_FOUND to TRUE
# if all listed variables are TRUE, hide their existence from configuration view
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
nlohmann_json
REQUIRED_VARS nlohmann_json_INCLUDE_DIR nlohmann_json_INCLUDE_NAME
VERSION_VAR nlohmann_json_VERSION)
if(nlohmann_json_FOUND AND NOT (TARGET nlohmann_json))
add_library(nlohmann_json SHARED IMPORTED)
set_target_properties(nlohmann_json PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${nlohmann_json_INCLUDE_DIR}"
)
endif()
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