Airborne transports only land to (un)load.

OpenRA.Mods.Common/UpdateRules/Rules/20190314/RenameCarryallDelays.cs

@@ -0,0 +1,42 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2019 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 RenameCarryallDelays : UpdateRule
+	{
+		public override string Name { get { return "Rename Carryall and Cargo delay parameters"; } }
+		public override string Description
+		{
+			get
+			{
+				return "Carryall's LoadingDelay and UnloadingDelay parameters have been renamed\n"
+					+ "to BeforeLoadDelay and BeforeUnloadDelay to match new parameters on Cargo.";
+			}
+		}
+
+		public override IEnumerable<string> UpdateActorNode(ModData modData, MiniYamlNode actorNode)
+		{
+			foreach (var carryall in actorNode.ChildrenMatching("Carryall"))
+			{
+				foreach (var node in carryall.ChildrenMatching("LoadingDelay"))
+					node.RenameKey("BeforeLoadDelay");
+
+				foreach (var node in carryall.ChildrenMatching("UnloadingDelay"))
+					node.RenameKey("BeforeUnloadDelay");
+			}
+
+			yield break;
+		}
+	}
+}

OpenRA.Mods.Common/UpdateRules/UpdatePath.cs

@@ -129,6 +129,7 @@ namespace OpenRA.Mods.Common.UpdateRules
 				new RemovePlaceBuildingPalettes(),
 				new RenameHoversOffsetModifier(),
 				new AddAirAttackTypes(),
+				new RenameCarryallDelays(),
 			})
 		};