Unverified Commit f253e966 authored by NicolasIRAGNE's avatar NicolasIRAGNE Committed by GitHub
Browse files

Make the imported target installable (#7) 



Import from the original nlohmann repository the parts about installing the library.

Co-authored-by: default avatarNicolas IRAGNE <nicolas.iragne@alyce.fr>
Co-authored-by: default avatarArthurSonzogni <sonzogniarthur@gmail.com>
parent b48095ee

CMakeLists.txt

+64 −1
Original line number Diff line number Diff line
@@ -4,7 +4,9 @@ project(nlohmann_json LANGUAGES CXX) 
add_library(nlohmann_json INTERFACE)

add_library(nlohmann_json::nlohmann_json ALIAS nlohmann_json)

target_include_directories(nlohmann_json

  INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/include

  INTERFACE

    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>

    $<INSTALL_INTERFACE:include/nlohmann>

)



if (${CMAKE_VERSION} VERSION_LESS "3.8.0")
@@ -12,3 +14,64 @@ if (${CMAKE_VERSION} VERSION_LESS "3.8.0") 
else()

  target_compile_features(nlohmann_json INTERFACE cxx_std_11)

endif()



include(GNUInstallDirs)



set(NLOHMANN_JSON_TARGET_NAME               ${PROJECT_NAME})

set(NLOHMANN_JSON_CONFIG_INSTALL_DIR        "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}" CACHE INTERNAL "")

set(NLOHMANN_JSON_INCLUDE_INSTALL_DIR       "${CMAKE_INSTALL_INCLUDEDIR}")

set(NLOHMANN_JSON_TARGETS_EXPORT_NAME       "${PROJECT_NAME}Targets")

set(NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE     "cmake/config.cmake.in")

set(NLOHMANN_JSON_CMAKE_CONFIG_DIR          "${CMAKE_CURRENT_BINARY_DIR}")

set(NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}ConfigVersion.cmake")

set(NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Config.cmake")

set(NLOHMANN_JSON_CMAKE_PROJECT_TARGETS_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Targets.cmake")



##

## INSTALL

## install header files, generate and install cmake config files for find_package()

##

include(CMakePackageConfigHelpers)



# use a custom package version config file instead of

# write_basic_package_version_file to ensure that it's architecture-independent

# https://github.com/nlohmann/json/issues/1697

configure_file(

  "cmake/nlohmann_jsonConfigVersion.cmake.in"

  ${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE}

  @ONLY

)



configure_file(

  ${NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE}

  ${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE}

  @ONLY

)



install(

  DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include/nlohmann

  DESTINATION ${NLOHMANN_JSON_INCLUDE_INSTALL_DIR}

)



install(

  FILES ${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE} ${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE}

  DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}

)



export(

  TARGETS ${NLOHMANN_JSON_TARGET_NAME}

  NAMESPACE ${PROJECT_NAME}::

  FILE ${NLOHMANN_JSON_CMAKE_PROJECT_TARGETS_FILE}

)



install(

  TARGETS ${NLOHMANN_JSON_TARGET_NAME}

  EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME}

  INCLUDES DESTINATION ${NLOHMANN_JSON_INCLUDE_INSTALL_DIR}

)



install(

  EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME}

  NAMESPACE ${PROJECT_NAME}::

  DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}

)

cmake/config.cmake.in

0 → 100644
+15 −0
Original line number Diff line number Diff line 
include(FindPackageHandleStandardArgs)

set(${CMAKE_FIND_PACKAGE_NAME}_CONFIG ${CMAKE_CURRENT_LIST_FILE})

find_package_handle_standard_args(@PROJECT_NAME@ CONFIG_MODE)



if(NOT TARGET @PROJECT_NAME@::@NLOHMANN_JSON_TARGET_NAME@)

    include("${CMAKE_CURRENT_LIST_DIR}/@NLOHMANN_JSON_TARGETS_EXPORT_NAME@.cmake")

    if((NOT TARGET @NLOHMANN_JSON_TARGET_NAME@) AND

       (NOT @PROJECT_NAME@_FIND_VERSION OR

        @PROJECT_NAME@_FIND_VERSION VERSION_LESS 3.2.0))

        add_library(@NLOHMANN_JSON_TARGET_NAME@ INTERFACE IMPORTED)

        set_target_properties(@NLOHMANN_JSON_TARGET_NAME@ PROPERTIES

            INTERFACE_LINK_LIBRARIES @PROJECT_NAME@::@NLOHMANN_JSON_TARGET_NAME@

        )

    endif()

endif()
 
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cmake/nlohmann_jsonConfigVersion.cmake.in

0 → 100644
+20 −0
Original line number Diff line number Diff line 
# This is essentially cmake's BasicConfigVersion-SameMajorVersion.cmake.in but

# without the 32/64-bit check.  Since json is a header-only library, it doesn't

# matter if it was built on a different platform than what it is used on (see

# https://github.com/nlohmann/json/issues/1697).

set(PACKAGE_VERSION "@PROJECT_VERSION@")



if(PACKAGE_VERSION VERSION_LESS PACKAGE_FIND_VERSION)

  set(PACKAGE_VERSION_COMPATIBLE FALSE)

else()



  if(PACKAGE_FIND_VERSION_MAJOR STREQUAL "@PROJECT_VERSION_MAJOR@")

    set(PACKAGE_VERSION_COMPATIBLE TRUE)

  else()

    set(PACKAGE_VERSION_COMPATIBLE FALSE)

  endif()



  if(PACKAGE_FIND_VERSION STREQUAL PACKAGE_VERSION)

      set(PACKAGE_VERSION_EXACT TRUE)

  endif()

endif()
 
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