Use master rapidjson for discord-rpc (fixes #123)

external/discord_rpc/CMakeLists.txt

@@ -32,21 +32,15 @@ execute_process(
     ERROR_QUIET
 )
 
-find_file(RAPIDJSONTEST NAMES rapidjson rapidjson-1.1.0 PATHS ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty CMAKE_FIND_ROOT_PATH_BOTH)
-if (NOT RAPIDJSONTEST)
-    message("no rapidjson, download")
-    set(RJ_TAR_FILE ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/v1.1.0.tar.gz)
-    file(DOWNLOAD https://github.com/miloyip/rapidjson/archive/v1.1.0.tar.gz ${RJ_TAR_FILE})
-    execute_process(
-        COMMAND ${CMAKE_COMMAND} -E tar xzf ${RJ_TAR_FILE}
-        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty
+include(FetchContent)
+
+FetchContent_Declare(
+    rapidjson
+    GIT_REPOSITORY https://github.com/Tencent/rapidjson
+    GIT_TAG 24b5e7a8b27f42fa16b96fc70aade9106cf7102f
 )
-    file(REMOVE ${RJ_TAR_FILE})
-endif(NOT RAPIDJSONTEST)
 
-find_file(RAPIDJSON NAMES rapidjson rapidjson-1.1.0 PATHS ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty CMAKE_FIND_ROOT_PATH_BOTH)
-
-add_library(rapidjson STATIC IMPORTED ${RAPIDJSON})
+FetchContent_MakeAvailable(rapidjson)
 
 # add subdirs
 

external/discord_rpc/src/CMakeLists.txt

@@ -109,7 +109,7 @@ if(UNIX)
     endif (APPLE)
 endif(UNIX)
 
-target_include_directories(discord-rpc PRIVATE ${RAPIDJSON}/include)
+target_include_directories(discord-rpc PRIVATE ${rapidjson_SOURCE_DIR}/include)
 
 if (NOT ${ENABLE_IO_THREAD})
     target_compile_definitions(discord-rpc PUBLIC -DDISCORD_DISABLE_IO_THREAD)