Enable dedicated server lint checks.

OpenRA.Mods.Common/Lint/CheckOwners.cs

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+#region Copyright & License Information
+/*
+ * Copyright 2007-2020 The OpenRA Developers (see AUTHORS)
+ * 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.Collections.Generic;
+using System.Linq;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Lint
+{
+	public class CheckOwners : ILintMapPass
+	{
+		public void Run(Action<string> emitError, Action<string> emitWarning, ModData modData, Map map)
+		{
+			var playerNames = new MapPlayers(map.PlayerDefinitions).Players.Values
+				.Select(p => p.Name)
+				.ToHashSet();
+
+			// Check for actors that require specific owners
+			var actorsWithRequiredOwner = map.Rules.Actors
+				.Where(a => a.Value.HasTraitInfo<RequiresSpecificOwnersInfo>())
+				.ToDictionary(a => a.Key, a => a.Value.TraitInfo<RequiresSpecificOwnersInfo>());
+
+			foreach (var kv in map.ActorDefinitions)
+			{
+				var actorReference = new ActorReference(kv.Value.Value, kv.Value.ToDictionary());
+				var ownerInit = actorReference.GetOrDefault<OwnerInit>();
+				if (ownerInit == null)
+					emitError("Actor {0} is not owned by any player.".F(kv.Key));
+				else
+				{
+					var ownerName = ownerInit.InternalName;
+					if (!playerNames.Contains(ownerName))
+						emitError("Actor {0} is owned by unknown player {1}.".F(kv.Key, ownerName));
+
+					if (actorsWithRequiredOwner.TryGetValue(kv.Value.Value, out var info))
+						if (!info.ValidOwnerNames.Contains(ownerName))
+							emitError("Actor {0} owner {1} is not one of ValidOwnerNames: {2}".F(kv.Key, ownerName, info.ValidOwnerNames.JoinWith(", ")));
+				}
+			}
+		}
+	}
+}