Rename EmitInfantryOnSell and remove default actor type.

OpenRA.Mods.Common/UpdateRules/Rules/RenameEmitInfantryOnSell.cs

@@ -0,0 +1,45 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2018 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.Collections.Generic;
+
+namespace OpenRA.Mods.Common.UpdateRules.Rules
+{
+    public class RenameEmitInfantryOnSell : UpdateRule
+    {
+        public override string Name { get { return "EmitInfantryOnSell renamed to SpawnActorsOnSell"; } }
+        public override string Description
+        {
+            get
+            {
+                return "The EmitInfantryOnSell trait was renamed to SpawnActorsOnSell and the default\n" +
+                    "actor type to spawn was removed. Uses of the old traits and defaults are updated\n" +
+                    "to account for this.";
+            }
+        }
+
+        public override IEnumerable<string> UpdateActorNode(ModData modData, MiniYamlNode actorNode)
+        {
+            foreach (var uneios in actorNode.ChildrenMatching("-EmitInfantryOnSell"))
+                uneios.RenameKeyPreservingSuffix("-SpawnActorsOnSell");
+
+            foreach (var eios in actorNode.ChildrenMatching("EmitInfantryOnSell"))
+            {
+                eios.RenameKeyPreservingSuffix("SpawnActorsOnSell");
+                var actortypes = eios.LastChildMatching("ActorTypes");
+                if (actortypes == null)
+                    eios.AddNode("ActorTypes", "e1");
+            }
+
+            yield break;
+        }
+    }
+}