hot reloading (F5)

buildnumber.txt

@@ -1 +1 @@
-958
+963

source/funkin/game/PlayState.hx

@@ -746,6 +746,9 @@ class PlayState extends MusicBeatState
 			DiscordClient.changePresence("Chart Editor", null, null, true);
 			#end
 		}
+		if (FlxG.keys.justPressed.F5) {
+			scripts.reload();
+		}
 
 		// FlxG.watch.addQuick('VOL', vocals.amplitudeLeft);
 		// FlxG.watch.addQuick('VOLRight', vocals.amplitudeRight);

source/funkin/scripting/HScript.hx

@@ -36,6 +36,23 @@ class HScript extends Script {
         if (expr != null) interp.execute(expr);
     }
 
+    public override function reload() {
+        // save variables
+        var savedVariables:Map<String, Dynamic> = [];
+        for(k=>e in interp.variables) {
+            if (!Reflect.isFunction(e)) {
+                savedVariables[k] = e;
+            }
+        }
+        var oldParent = interp.scriptObject;
+        onCreate(path);
+        load();
+        setParent(oldParent);
+        for(k=>e in savedVariables) {
+            interp.variables.set(k, e);
+        }
+    }
+
     private override function onCall(funcName:String, parameters:Array<Dynamic>):Dynamic {
         if (interp == null) return null;
 

source/funkin/scripting/Script.hx

@@ -128,6 +128,13 @@ class Script extends FlxBasic implements IFlxDestroyable {
         curScript = oldScript;
     }
 
+    /**
+     * Hot-reloads the script, if possible
+     */
+    public function reload() {
+        
+    }
+
     /**
      * Calls the function `func` defined in the script.
      * @param func Name of the function

source/funkin/scripting/ScriptPack.hx

@@ -43,6 +43,10 @@ class ScriptPack extends Script {
         return null;
     }
 
+    public override function reload() {
+        for(e in scripts) e.reload();
+    }
+
     public override function set(val:String, value:Dynamic) {
         for(e in scripts) e.set(val, value);
     }