Merge pull request #669 from dan-42/change_installed_cmake_include_path
REFACTOR: rewrite CMakeLists.txt for better inlcude and reuse
This commit is contained in:
Niels Lohmann
GitHub
commit
67fb517ccd
2 changed files with 68 additions and 50 deletions
110
CMakeLists.txt
110
CMakeLists.txt
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@ -1,56 +1,78 @@
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cmake_minimum_required(VERSION 3.0)
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cmake_minimum_required(VERSION 3.0.0)
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# define the project
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project(nlohmann_json VERSION 2.1.1 LANGUAGES CXX)
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##
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## PROJECT
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## name and version
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##
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project(nlohmann_json VERSION 2.1.1)
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##
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## OPTIONS
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##
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option(JSON_BuildTests "Build the unit tests" ON)
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# define project variables
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set(JSON_TARGET_NAME ${PROJECT_NAME})
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set(JSON_PACKAGE_NAME ${JSON_TARGET_NAME})
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set(JSON_TARGETS_FILENAME "${JSON_PACKAGE_NAME}Targets.cmake")
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set(JSON_CONFIG_FILENAME "${JSON_PACKAGE_NAME}Config.cmake")
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set(JSON_CONFIGVERSION_FILENAME "${JSON_PACKAGE_NAME}ConfigVersion.cmake")
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set(JSON_CONFIG_DESTINATION "cmake")
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set(JSON_INCLUDE_DESTINATION "include/nlohmann")
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##
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## CONFIGURATION
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##
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set(NLOHMANN_JSON_TARGET_NAME ${PROJECT_NAME})
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set(NLOHMANN_JSON_SOURCE_DIR "src/")
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set(NLOHMANN_JSON_CONFIG_INSTALL_DIR "lib/cmake/${PROJECT_NAME}")
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set(NLOHMANN_JSON_INCLUDE_INSTALL_DIR "include")
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set(NLOHMANN_JSON_HEADER_INSTALL_DIR "${NLOHMANN_JSON_INCLUDE_INSTALL_DIR}/nlohmann")
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set(NLOHMANN_JSON_TARGETS_EXPORT_NAME "${PROJECT_NAME}Targets")
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set(NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE "cmake/config.cmake.in")
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set(NLOHMANN_JSON_CMAKE_CONFIG_DIR "${CMAKE_CURRENT_BINARY_DIR}/cmake_config")
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set(NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
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set(NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Config.cmake")
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set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
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##
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## TARGET
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## create target and add include path
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##
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add_library(${NLOHMANN_JSON_TARGET_NAME} INTERFACE)
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# create and configure the library target
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add_library(${JSON_TARGET_NAME} INTERFACE)
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target_include_directories(${JSON_TARGET_NAME} INTERFACE
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$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
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$<INSTALL_INTERFACE:${JSON_INCLUDE_DESTINATION}>)
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# create and configure the unit test target
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target_include_directories(
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${NLOHMANN_JSON_TARGET_NAME}
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INTERFACE $<INSTALL_INTERFACE:include/>
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)
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##
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## TESTS
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## create and configure the unit test target
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##
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if(JSON_BuildTests)
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enable_testing()
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include_directories(${NLOHMANN_JSON_SOURCE_DIR})
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add_subdirectory(test)
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endif()
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# generate a config and config version file for the package
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##
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## INSTALL
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## install header files, generate and install cmake config files for find_package()
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##
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include(CMakePackageConfigHelpers)
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configure_package_config_file("cmake/config.cmake.in"
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"${CMAKE_CURRENT_BINARY_DIR}/${JSON_CONFIG_FILENAME}"
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INSTALL_DESTINATION ${JSON_CONFIG_DESTINATION}
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PATH_VARS JSON_INCLUDE_DESTINATION)
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write_basic_package_version_file("${CMAKE_CURRENT_BINARY_DIR}/${JSON_CONFIGVERSION_FILENAME}"
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VERSION ${PROJECT_VERSION}
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COMPATIBILITY SameMajorVersion)
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# export the library target and store build directory in package registry
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export(TARGETS ${JSON_TARGET_NAME}
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FILE "${CMAKE_CURRENT_BINARY_DIR}/${JSON_TARGETS_FILENAME}")
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export(PACKAGE ${JSON_PACKAGE_NAME})
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# install library target and config files
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install(TARGETS ${JSON_TARGET_NAME}
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EXPORT ${JSON_PACKAGE_NAME})
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install(FILES "src/json.hpp"
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DESTINATION ${JSON_INCLUDE_DESTINATION})
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install(EXPORT ${JSON_PACKAGE_NAME}
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FILE ${JSON_TARGETS_FILENAME}
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DESTINATION ${JSON_CONFIG_DESTINATION})
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install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${JSON_CONFIG_FILENAME}"
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"${CMAKE_CURRENT_BINARY_DIR}/${JSON_CONFIGVERSION_FILENAME}"
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DESTINATION ${JSON_CONFIG_DESTINATION})
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write_basic_package_version_file(
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${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE} COMPATIBILITY SameMajorVersion
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)
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configure_package_config_file(
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${NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE}
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${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE}
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INSTALL_DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
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)
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install(
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DIRECTORY ${NLOHMANN_JSON_SOURCE_DIR}
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DESTINATION ${NLOHMANN_JSON_HEADER_INSTALL_DIR}
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)
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install(
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FILES ${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE} ${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE}
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DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
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)
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install(
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TARGETS ${NLOHMANN_JSON_TARGET_NAME}
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EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME}
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INCLUDES DESTINATION ${NLOHMANN_JSON_INCLUDE_INSTALL_DIR}
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)
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install(
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EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME}
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DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
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)
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@ -1,7 +1,3 @@
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@PACKAGE_INIT@
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set_and_check(JSON_INCLUDE_DIR "@PACKAGE_JSON_INCLUDE_DESTINATION@")
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cmake_policy(PUSH)
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cmake_policy(SET CMP0024 OLD)
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include(${CMAKE_CURRENT_LIST_DIR}/@JSON_TARGETS_FILENAME@)
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cmake_policy(POP)
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include("${CMAKE_CURRENT_LIST_DIR}/@NLOHMANN_JSON_TARGETS_EXPORT_NAME@.cmake")
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check_required_components("@PROJECT_NAME@")
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