myx/MyxCMake/lib/TargetSetup.cmake

include_guard(GLOBAL)

function(myx_target_setup TARGET_NAME)
  set(options)
  set(oneValueArgs PCH)
  set(multiValueArgs PACKAGES
                     COMPILE_DEFINITIONS INCLUDE_DIRECTORIES LINK_LIBRARIES
                     CPP PUBLIC_HEADERS PRIVATE_HEADERS)
  cmake_parse_arguments(ARG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})

  if(NOT TARGET ${TARGET_NAME})
    myx_message_fatal_error("Target ${TARGET_NAME} does not exists.")
  endif()

  get_target_property(target_type ${TARGET_NAME} TYPE)
  if(${target_type} STREQUAL "INTERFACE_LIBRARY")
    myx_message_fatal_error("This function will not work for interface targets.")
  endif()

  foreach(iter ${ARG_PACKAGES})
    target_include_directories(${TARGET_NAME} PRIVATE ${${iter}_INCLUDE_DIRS})
    target_compile_definitions(${TARGET_NAME} PRIVATE ${${iter}_COMPILE_DEFINITIONS})
  endforeach()

  if(ARG_CPP)
    set_property(TARGET ${TARGET_NAME} APPEND PROPERTY CPP_FILES ${ARG_CPP})
    set_property(TARGET ${TARGET_NAME} APPEND PROPERTY TR_FILES ${ARG_CPP})
  endif()

  if(ARG_PUBLIC_HEADERS)
    set_property(TARGET ${TARGET_NAME} APPEND PROPERTY PUBLIC_HEADER_FILES "${ARG_PUBLIC_HEADERS}")
    set_property(TARGET ${TARGET_NAME} APPEND PROPERTY TR_FILES ${ARG_PUBLIC_HEADERS})
  endif()

  if(ARG_PRIVATE_HEADERS)
    set_property(TARGET ${TARGET_NAME} APPEND PROPERTY PRIVATE_HEADER_FILES "${ARG_PRIVATE_HEADERS}")
    set_property(TARGET ${TARGET_NAME} APPEND PROPERTY TR_FILES ${ARG_PRIVATE_HEADERS})
  endif()

  if(ARG_PCH)
    if((${CMAKE_VERSION} VERSION_GREATER_EQUAL 3.16) AND (PROJECT_IS_TOP_LEVEL OR MYX_USE_LOCAL_DIRECTORIES))
      target_precompile_headers(${TARGET_NAME} PRIVATE ${ARG_PCH})
    else()
      target_compile_options(${TARGET_NAME} PRIVATE -include ${ARG_PCH})
    endif()
    set_property(TARGET ${TARGET_NAME} APPEND PROPERTY PRIVATE_HEADER_FILES "${ARG_PCH}")
  endif()

  target_include_directories(${PROJECT_NAME} PRIVATE
    $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>)

  if(IS_DIRECTORY "${PROJECT_SOURCE_DIR}/src")
    target_include_directories(${PROJECT_NAME} PRIVATE
      $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/src>)
  endif()

  if(target_type STREQUAL "EXECUTABLE")
    if(IS_DIRECTORY "${PROJECT_SOURCE_DIR}/include")
      target_include_directories(${PROJECT_NAME} PRIVATE
        $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
    endif()
    if(IS_DIRECTORY "${PROJECT_SOURCE_DIR}/include/${PROJECT_NAME}")
      target_include_directories(${PROJECT_NAME} PRIVATE
        $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include/${PROJECT_NAME}>)
    endif()

    set_target_properties(${TARGET_NAME} PROPERTIES
      POSITION_INDEPENDENT_CODE ON
      RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}
    )

    if(CMAKE_CXX_COMPILE_OPTIONS_PIE)
      target_compile_options(${TARGET_NAME} PUBLIC ${CMAKE_CXX_COMPILE_OPTIONS_PIE})
    endif()
    install(TARGETS ${TARGET_NAME} COMPONENT MAIN RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
  endif()

#  target_sources(${TARGET_NAME} PUBLIC ${ARG_PUBLIC_HEADERS})
  target_sources(${TARGET_NAME} PRIVATE ${ARG_CPP} ${ARG_PCH} ${ARG_PRIVATE_HEADERS})
  target_sources(${TARGET_NAME} PUBLIC $<BUILD_INTERFACE:${ARG_PUBLIC_HEADERS}>)
  target_compile_definitions(${TARGET_NAME} PRIVATE ${ARG_COMPILE_DEFINITIONS})
  target_include_directories(${TARGET_NAME} PRIVATE ${ARG_INCLUDE_DIRECTORIES})

  # CMake до версии 3.12 не умеет извлекать из целей типа `OBJECT_LIBRARY`
  # информацию о заголовочных файлах. Это обход.
  if(${CMAKE_VERSION} VERSION_GREATER "3.11.99")
    target_link_libraries(${TARGET_NAME} PRIVATE ${ARG_LINK_LIBRARIES})
  else()
    if((NOT ${target_type} STREQUAL "OBJECT_LIBRARY") AND
       (NOT ${target_type} STREQUAL "EXECUTABLE"))
      target_link_libraries(${TARGET_NAME} PRIVATE ${ARG_LINK_LIBRARIES})
    else()
      foreach(__link_library ${ARG_LINK_LIBRARIES})
        if(TARGET ${__link_library})
          get_target_property(__lib_type ${__link_library} TYPE)
          if(__lib_type)
            get_target_property(__include_dirs ${__link_library} INTERFACE_INCLUDE_DIRECTORIES)
            if(__include_dirs)
              target_include_directories(${TARGET_NAME} PUBLIC ${__include_dirs})
            endif()
            if(${target_type} STREQUAL "EXECUTABLE")
              if(${__lib_type} STREQUAL "OBJECT_LIBRARY")
                if(TARGET ${__link_library}_static)
                  target_link_libraries(${TARGET_NAME} PRIVATE ${__link_library}_static)
                else()
                  target_link_libraries(${TARGET_NAME} PRIVATE ${__link_library}_shared)
              endif()
              else()
                target_link_libraries(${TARGET_NAME} PRIVATE ${__link_library})
              endif()
            endif()
          endif()
        else()
          if((${CMAKE_VERSION} VERSION_GREATER "3.7.99") OR (NOT target_type STREQUAL "OBJECT_LIBRARY"))
            target_link_libraries(${TARGET_NAME} PRIVATE ${__link_library})
          endif()
        endif()
      endforeach()
    endif()
  endif()

  # Установка публичных заголовочных файлов
  if(PROJECT_IS_TOP_LEVEL AND ARG_PUBLIC_HEADERS)
    myx_install_relative(${PROJECT_SOURCE_DIR}
      FILES ${ARG_PUBLIC_HEADERS}
      DESTINATION ${CMAKE_INSTALL_PREFIX}
      COMPONENT DEV
    )
  endif()
endfunction()