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/LintBuildablePrerequisites.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;
+using System.Linq;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Server;
+
+namespace OpenRA.Mods.Common.Lint
+{
+	sealed class LintBuildablePrerequisites : ILintRulesPass, ILintServerMapPass
+	{
+		void ILintRulesPass.Run(Action<string> emitError, Action<string> emitWarning, ModData modData, Ruleset rules)
+		{
+			Run(emitError, rules);
+		}
+
+		void ILintServerMapPass.Run(Action<string> emitError, Action<string> emitWarning, ModData modData, MapPreview map, Ruleset mapRules)
+		{
+			Run(emitError, mapRules);
+		}
+
+		static void Run(Action<string> emitError, Ruleset rules)
+		{
+			var providedPrereqs = rules.Actors.SelectMany(a => a.Value.TraitInfos<ITechTreePrerequisiteInfo>().SelectMany(p => p.Prerequisites(a.Value)));
+
+			// TODO: this check is case insensitive while the real check in-game is not.
+			foreach (var actorInfo in rules.Actors)
+			{
+				// Catch TypeDictionary errors.
+				try
+				{
+					var bi = actorInfo.Value.TraitInfoOrDefault<BuildableInfo>();
+					if (bi != null)
+						foreach (var prereq in bi.Prerequisites)
+							if (!prereq.StartsWith("~disabled", StringComparison.Ordinal) && !providedPrereqs.Contains(prereq.Replace("!", "").Replace("~", "")))
+								emitError($"Buildable actor `{actorInfo.Key}` has prereq `{prereq}` not provided by anything.");
+				}
+				catch (InvalidOperationException e)
+				{
+					emitError($"{e.Message} (Actor type `{actorInfo.Key}`).");
+				}
+			}
+		}
+	}
+}