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.Mods.Common/Lint/CheckTraitPrerequisites.cs

@@ -0,0 +1,47 @@
+#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;
+using System.Linq;
+using OpenRA.Server;
+
+namespace OpenRA.Mods.Common.Lint
+{
+	public class CheckTraitPrerequisites : ILintRulesPass, ILintServerMapPass
+	{
+		void ILintRulesPass.Run(Action<string> emitError, Action<string> emitWarning, ModData modData, Ruleset rules)
+		{
+			Run(emitError, emitWarning, rules);
+		}
+
+		void ILintServerMapPass.Run(Action<string> emitError, Action<string> emitWarning, ModData modData, MapPreview map, Ruleset mapRules)
+		{
+			Run(emitError, emitWarning, mapRules);
+		}
+
+		static void Run(Action<string> emitError, Action<string> emitWarning, Ruleset rules)
+		{
+			foreach (var actorInfo in rules.Actors)
+			{
+				try
+				{
+					var hasTraits = actorInfo.Value.TraitsInConstructOrder().Any();
+					if (!hasTraits && !Enum.TryParse<SystemActors>(actorInfo.Key, true, out _))
+						emitWarning($"Actor `{actorInfo.Key}` has no traits. Is this intended?");
+				}
+				catch (Exception e)
+				{
+					emitError($"Actor `{actorInfo.Key}` is not constructible; failure: {e.Message}.");
+				}
+			}
+		}
+	}
+}