Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Game/UtilityCommands/ClearInvalidModRegistrationsCommand.cs

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+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Linq;
+
+namespace OpenRA.UtilityCommands
+{
+	sealed class ClearInvalidModRegistrationsCommand : IUtilityCommand
+	{
+		string IUtilityCommand.Name => "--clear-invalid-mod-registrations";
+
+		bool IUtilityCommand.ValidateArguments(string[] args)
+		{
+			return args.Length >= 2 && new string[] { "system", "user", "both" }.Contains(args[1]);
+		}
+
+		[Desc("(system|user|both)", "Removes invalid metadata entries for the in-game mod switcher.")]
+		void IUtilityCommand.Run(Utility utility, string[] args)
+		{
+			ModRegistration type = 0;
+			if (args[1] == "system" || args[1] == "both")
+				type |= ModRegistration.System;
+
+			if (args[1] == "user" || args[1] == "both")
+				type |= ModRegistration.User;
+
+			new ExternalMods().ClearInvalidRegistrations(type);
+		}
+	}
+}