Refactor out the vcpkg cmake code

CMakeLists.txt

@@ -1,25 +1,6 @@
 cmake_minimum_required(VERSION 3.16)
 
-include(FetchContent)
-FetchContent_Declare(
-    vcpkg
-    GIT_REPOSITORY https://github.com/microsoft/vcpkg
-    GIT_TAG 1257354a3ab0bebd8abe95281ca561537853578c
-)
-
-if(NOT DEFINED CMAKE_TOOLCHAIN_FILE)
-    FetchContent_GetProperties(vcpkg
-        POPULATED vcpkg_POPULATED
-        SOURCE_DIR vcpkg_SOURCE_DIR)
-    if(NOT vcpkg_POPULATED)
-        FetchContent_Populate(vcpkg)
-    endif()
-
-    set(CMAKE_TOOLCHAIN_FILE
-        "${vcpkg_SOURCE_DIR}/scripts/buildsystems/vcpkg.cmake")
-    set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE
-        "${CMAKE_CURRENT_SOURCE_DIR}/cmake/toolchain.cmake")
-endif()
+include(cmake/vcpkg.cmake)
 
 project(pacman LANGUAGES CXX)
 
@@ -27,6 +8,7 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 enable_testing()
+
 add_subdirectory(scaling-lib)
 add_subdirectory(lib)
 add_subdirectory(src)

cmake/vcpkg.cmake

@@ -0,0 +1,20 @@
+include(FetchContent)
+FetchContent_Declare(
+        vcpkg
+        GIT_REPOSITORY https://github.com/microsoft/vcpkg
+        GIT_TAG 1257354a3ab0bebd8abe95281ca561537853578c
+)
+
+if(NOT DEFINED CMAKE_TOOLCHAIN_FILE)
+    FetchContent_GetProperties(vcpkg
+            POPULATED vcpkg_POPULATED
+            SOURCE_DIR vcpkg_SOURCE_DIR)
+    if(NOT vcpkg_POPULATED)
+        FetchContent_Populate(vcpkg)
+    endif()
+
+    set(CMAKE_TOOLCHAIN_FILE
+            "${vcpkg_SOURCE_DIR}/scripts/buildsystems/vcpkg.cmake")
+    set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE
+            "${CMAKE_CURRENT_LIST_DIR}/toolchain.cmake")
+endif()