pull doCommand call out of UpdateState

game/commands.go

@@ -32,7 +32,10 @@ func CommandLoop(w *pixelgl.Window, s State, stateCA chan<- State) {
 			w.SetClosed(true)
 			return
 		case w.JustPressed(pixelgl.KeyEnter) || w.Pressed(pixelgl.KeySpace) || true:
-			s = UpdateState(s, sOld, <-cmdC)
+			for i, cmd := range <-cmdC {
+				s = doCommand(cmd, s, i)
+			}
+			s = UpdateState(s, sOld)
 			turn++
 			if s.GameOver {
 				s = NewState()

game/game.go

@@ -42,11 +42,7 @@ type Baton struct {
 	HolderID int
 }
 
-func UpdateState(s State, sOld State, cmds []Command) State {
-	for i, cmd := range cmds {
-		s = doCommand(cmd, s, i)
-	}
-
+func UpdateState(s State, sOld State) State {
 	var winners []int
 	for _, t := range s.Teams {
 		if r := ActiveRacer(t); r != nil {