AimRT/cmake/GetJsonCpp.cmake

# Copyright (c) 2023, AgiBot Inc.
# All rights reserved.

include(FetchContent)

message(STATUS "get jsoncpp ...")

set(jsoncpp_DOWNLOAD_URL
    "https://github.com/open-source-parsers/jsoncpp/archive/1.9.6.tar.gz"
    CACHE STRING "")

if(jsoncpp_LOCAL_SOURCE)
  FetchContent_Declare(
    jsoncpp
    SOURCE_DIR ${jsoncpp_LOCAL_SOURCE}
    OVERRIDE_FIND_PACKAGE)
else()
  FetchContent_Declare(
    jsoncpp
    URL ${jsoncpp_DOWNLOAD_URL}
    DOWNLOAD_EXTRACT_TIMESTAMP TRUE
    OVERRIDE_FIND_PACKAGE)
endif()

# Wrap it in a function to restrict the scope of the variables
function(get_jsoncpp)
  FetchContent_GetProperties(jsoncpp)
  if(NOT jsoncpp_POPULATED)
    set(JSONCPP_WITH_TESTS OFF)

    set(JSONCPP_WITH_POST_BUILD_UNITTEST OFF)

    set(BUILD_OBJECT_LIBS OFF)

    if(BUILD_SHARED_LIBS)
      set(BUILD_SHARED_LIBS ON)
      set(BUILD_STATIC_LIBS OFF)
    else()
      set(BUILD_SHARED_LIBS OFF)
      set(BUILD_STATIC_LIBS ON)
    endif()

    FetchContent_MakeAvailable(jsoncpp)

    if(TARGET jsoncpp_static)
      add_library(jsoncpp::jsoncpp ALIAS jsoncpp_static)
    elseif(TARGET jsoncpp_lib)
      add_library(jsoncpp::jsoncpp ALIAS jsoncpp_lib)
    endif()
  endif()
endfunction()

get_jsoncpp()

# import targets:
# jsoncpp::jsoncpp