fix cmake warnings

Author: prevter

CMakeLists.txt

@@ -2,8 +2,13 @@ cmake_minimum_required(VERSION 3.21)
 project(rift)
 
 include(cmake/CPM.cmake)
-CPMAddPackage("gh:fmtlib/fmt#64db979")
-CPMAddPackage("gh:geode-sdk/result#4106d12")
+
+if (NOT TARGET fmt)
+    CPMAddPackage("gh:fmtlib/fmt#12.1.0")
+endif ()
+if (NOT TARGET GeodeResult)
+    CPMAddPackage("gh:geode-sdk/result@1.3.4")
+endif ()
 
 set(CMAKE_CXX_STANDARD 20)
 
@@ -14,7 +19,9 @@ target_link_libraries(rift fmt GeodeResult)
 
 # Allows an easier conversion of rift::Value to JSON and vice versa
 if (RIFT_INCLUDE_MATJSON)
-    CPMAddPackage("gh:geode-sdk/json#0ea6009")
+    if (NOT TARGET mat-json)
+        CPMAddPackage("gh:geode-sdk/json@3.2.2")
+    endif ()
     target_compile_definitions(rift PUBLIC RIFT_INCLUDE_MATJSON)
     target_link_libraries(rift mat-json)
 endif ()