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/FileSystem/DefaultFileSystemLoader.cs

@@ -0,0 +1,50 @@
+#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.Collections.Generic;
+using System.Collections.Immutable;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.FileSystem
+{
+	[RequireExplicitImplementation]
+	public interface IFileSystemExternalContent
+	{
+		bool InstallContentIfRequired(ModData modData);
+		void ManageContent(ModData modData);
+	}
+
+	public class DefaultFileSystemLoader : IFileSystemLoader
+	{
+		[FieldLoader.LoadUsing(nameof(LoadPackages))]
+		public readonly ImmutableArray<KeyValuePair<string, string>> Packages = default;
+
+		static object LoadPackages(MiniYaml yaml)
+		{
+			var packageNode = yaml.NodeWithKeyOrDefault(nameof(Packages));
+			if (packageNode == null)
+				return default(ImmutableArray<KeyValuePair<string, string>>);
+
+			var packages = new List<KeyValuePair<string, string>>(packageNode.Value.Nodes.Length);
+			foreach (var node in packageNode.Value.Nodes)
+				packages.Add(KeyValuePair.Create(node.Key, node.Value.Value));
+
+			return packages.ToImmutableArray();
+		}
+
+		public void Mount(Manifest manifest, OpenRA.FileSystem.FileSystem fileSystem, ObjectCreator objectCreator)
+		{
+			if (Packages != null)
+				foreach (var kv in Packages)
+					fileSystem.Mount(kv.Key, kv.Value);
+		}
+	}
+}