Add a package-oriented Platform.ResolvePath() method

OpenRA.Game/Game.cs

@@ -191,7 +191,7 @@ namespace OpenRA
 
 		public static void InitializeSettings(Arguments args)
 		{
-			Settings = new Settings(Platform.ResolvePath("^", "settings.yaml"), args);
+			Settings = new Settings(Platform.ResolvePath(Path.Combine("^", "settings.yaml")), args);
 		}
 
 		internal static void Initialize(Arguments args)

OpenRA.Game/Platform.cs

@@ -95,11 +95,19 @@ namespace OpenRA
 
 		public static string GameDir { get { return AppDomain.CurrentDomain.BaseDirectory; } }
 
-		/// <summary>Replace special character prefixes with full paths</summary>
+		/// <summary>Replaces special character prefixes with full paths.</summary>
 		public static string ResolvePath(string path)
 		{
 			path = path.TrimEnd(new char[] { ' ', '\t' });
 
+			// If the path contains ':', chances are it is a package path.
+			// If it isn't, someone passed an already resolved path, which is wrong.
+			if (path.IndexOf(":", StringComparison.Ordinal) > 1)
+			{
+				var split = path.Split(':');
+				return ResolvePath(split[0], split[1]);
+			}
+
 			// paths starting with ^ are relative to the support dir
 			if (path.StartsWith("^"))
 				path = SupportDir + path.Substring(1);
@@ -111,7 +119,17 @@ namespace OpenRA
 			return path;
 		}
 
-		/// <summary>Replace special character prefixes with full paths</summary>
+		/// <summary>Replaces package names with full paths. Avoid using this for non-package paths.</summary>
+		public static string ResolvePath(string package, string target)
+		{
+			// Resolve mod package paths.
+			if (ModMetadata.AllMods.ContainsKey(package))
+				package = ModMetadata.CandidateModPaths[package];
+
+			return ResolvePath(Path.Combine(package, target));
+		}
+
+		/// <summary>Replace special character prefixes with full paths.</summary>
 		public static string ResolvePath(params string[] path)
 		{
 			return ResolvePath(path.Aggregate(Path.Combine));

OpenRA.Game/Renderer.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Drawing;
+using System.IO;
 using System.Linq;
 using System.Reflection;
 using OpenRA.Graphics;
@@ -49,7 +50,7 @@ namespace OpenRA
 			var resolution = GetResolution(graphicSettings);
 
 			var rendererName = serverSettings.Dedicated ? "Null" : graphicSettings.Renderer;
-			var rendererPath = Platform.ResolvePath(".", "OpenRA.Platforms." + rendererName + ".dll");
+			var rendererPath = Platform.ResolvePath(Path.Combine(".", "OpenRA.Platforms." + rendererName + ".dll"));
 
 			Device = CreateDevice(Assembly.LoadFile(rendererPath), resolution.Width, resolution.Height, graphicSettings.Mode);
 

OpenRA.Game/Sound/Sound.cs

@@ -33,7 +33,7 @@ namespace OpenRA
 
 		public Sound(string engineName)
 		{
-			var enginePath = Platform.ResolvePath(".", "OpenRA.Platforms." + engineName + ".dll");
+			var enginePath = Platform.ResolvePath(Path.Combine(".", "OpenRA.Platforms." + engineName + ".dll"));
 			soundEngine = CreateDevice(Assembly.LoadFile(enginePath));
 		}