add --version to mangohud script

bin/mangohud.in

@@ -15,6 +15,11 @@ if [ "$1" = "--dlsym" ]; then
 	shift
 fi
 
+if [ "$1" = "--version" ]; then
+	echo @version@
+	exit 0
+fi
+
 # Make sure we don't append mangohud lib multiple times
 # otherwise this could cause issues with steam runtime
 case ":${LD_PRELOAD-}:" in

src/meson.build

@@ -14,6 +14,7 @@ conf_data = configuration_data()
 conf_data.set('ld_libdir_mangohud_abs', libdir_mangohud)
 conf_data.set('ld_libdir_mangohud', ld_libdir_mangohud)
 conf_data.set('cpu_family', host_machine.cpu_family())
+conf_data.set('version', run_command(['git', 'describe', '--tags', '--dirty=+']).stdout().strip())
 
 overlay_shaders = [
   'overlay.frag',