UI: Automatically generate Windows file description

This defines the main OBS Windows executable with a resource file,
including a version number accessible externally and a File
description which appears in Windows Task Manager.

CMakeLists.txt

@@ -32,6 +32,16 @@ include(ObsHelpers)
 include(ObsCpack)
 include(GNUInstallDirs)
 
+if(WIN32)
+	string(REPLACE "-" ";" UI_VERSION_SPLIT ${OBS_VERSION})
+	list(GET UI_VERSION_SPLIT 0 UI_VERSION)
+	string(REPLACE "." ";" UI_VERSION_SEMANTIC ${UI_VERSION})
+	list(GET UI_VERSION_SEMANTIC 0 UI_VERSION_MAJOR)
+	list(GET UI_VERSION_SEMANTIC 1 UI_VERSION_MINOR)
+	list(GET UI_VERSION_SEMANTIC 2 UI_VERSION_PATCH)
+	configure_file(${CMAKE_CURRENT_SOURCE_DIR}/UI/obs.rc.in ${CMAKE_CURRENT_SOURCE_DIR}/UI/obs.rc)
+endif()
+
 # Must be a string in the format of "x.x.x-rcx"
 if(DEFINED RELEASE_CANDIDATE)
 	set(OBS_VERSION "${RELEASE_CANDIDATE}")