Add --refresh-map utility command.

OpenRA.Mods.Common/OpenRA.Mods.Common.csproj

@@ -629,6 +629,7 @@
     <Compile Include="UtilityCommands\ExtractZeroBraneStudioLuaAPI.cs" />
     <Compile Include="UtilityCommands\ExtractTraitDocsCommand.cs" />
     <Compile Include="UtilityCommands\ExtractWeaponDocsCommand.cs" />
+    <Compile Include="UtilityCommands\RefreshMapCommand.cs" />
     <Compile Include="Warheads\ChangeOwnerWarhead.cs" />
     <Compile Include="UtilityCommands\PngSheetExportMetadataCommand.cs" />
     <Compile Include="UtilityCommands\PngSheetImportMetadataCommand.cs" />

OpenRA.Mods.Common/UtilityCommands/RefreshMapCommand.cs

@@ -0,0 +1,35 @@
+#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 OpenRA.FileSystem;
+
+namespace OpenRA.Mods.Common.UtilityCommands
+{
+	class RefreshMapCommand : IUtilityCommand
+	{
+		string IUtilityCommand.Name { get { return "--refresh-map"; } }
+
+		bool IUtilityCommand.ValidateArguments(string[] args)
+		{
+			return args.Length >= 2;
+		}
+
+		[Desc("MAP", "Opens and resaves a map to reformat map.yaml and regenerate the preview.")]
+		void IUtilityCommand.Run(Utility utility, string[] args)
+		{
+			// HACK: The engine code assumes that Game.modData is set.
+			// HACK: We know that maps can only be oramap or folders, which are ReadWrite
+			var modData = Game.ModData = utility.ModData;
+			using (var package = new Folder(".").OpenPackage(args[1], modData.ModFiles))
+				new Map(modData, package).Save((IReadWritePackage)package);
+		}
+	}
+}