refactor preset loading

cmd/root.go

@@ -44,6 +44,22 @@ func (s *script) load(path string) error {
 	return err
 }
 
+func getPresets() []string {
+	var presets []string
+
+	if preset != "" {
+		presets = []string{preset}
+	}
+
+	if scriptPath != "" {
+		var s script
+		s.load(scriptPath)
+		presets = s.Presets
+	}
+
+	return presets
+}
+
 func handleWindowEvent(event *sdl.WindowEvent, m *milkDropWindow) {
 	switch event.Event {
 	case sdl.WINDOWEVENT_RESIZED:
@@ -84,24 +100,14 @@ func milkbucket(cmd *cobra.Command, args []string) {
 		log.Fatal("nothing to read from stdin")
 	}
 
-	var presets []string
-
-	if preset != "" {
-		presets = []string{preset}
-	}
-
-	if scriptPath != "" {
-		var s script
-		s.load(scriptPath)
-		presets = s.Presets
-	}
-
 	err = sdl.Init(sdl.INIT_VIDEO)
 	if err != nil {
 		panic(err)
 	}
 	defer sdl.Quit()
 
+	presets := getPresets()
+
 	m, err := newMilkDropWindow(800, 600, presets)
 	if err != nil {
 		panic(err)