From d79ecb432a47e4790ab91c80a1ca28a21549c18d Mon Sep 17 00:00:00 2001
From: Paul Chote <paul@chote.net>
Date: Sat, 18 Oct 2014 12:50:40 +1300
Subject: [PATCH] Write Lua debug information to lua.log.

---
 OpenRA.Game/Scripting/ScriptContext.cs | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/OpenRA.Game/Scripting/ScriptContext.cs b/OpenRA.Game/Scripting/ScriptContext.cs
index 456ea60923..a1c8f85d4a 100644
--- a/OpenRA.Game/Scripting/ScriptContext.cs
+++ b/OpenRA.Game/Scripting/ScriptContext.cs
@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Drawing;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Reflection;
@@ -118,6 +119,8 @@ namespace OpenRA.Scripting
 		{
 			runtime = new MemoryConstrainedLuaRuntime();
 
+			Log.AddChannel("lua", "lua.log");
+
 			World = world;
 			WorldRenderer = worldRenderer;
 			knownActorCommands = Game.modData.ObjectCreator
@@ -141,7 +144,7 @@ namespace OpenRA.Scripting
 
 			using (var registerGlobal = (LuaFunction)runtime.Globals["RegisterSandboxedGlobal"])
 			{
-				using (var fn = runtime.CreateFunctionFromDelegate((Action<string>)Console.WriteLine))
+				using (var fn = runtime.CreateFunctionFromDelegate((Action<string>)LogDebugMessage))
 					registerGlobal.Call("print", fn).Dispose();
 
 				// Register global tables
@@ -173,11 +176,22 @@ namespace OpenRA.Scripting
 			}
 		}
 
+		void LogDebugMessage(string message)
+		{
+			Console.WriteLine("Lua debug: {0}", message);
+			Log.Write("lua", message);
+		}
+
 		public bool FatalErrorOccurred { get; private set; }
 		public void FatalError(string message)
 		{
+			var stacktrace = new StackTrace().ToString();
 			Console.WriteLine("Fatal Lua Error: {0}", message);
-			Game.AddChatLine(Color.White, "Fatal Lua Error", message);
+			Console.WriteLine(stacktrace);
+
+			Log.Write("lua", "Fatal Lua Error: {0}", message);
+			Log.Write("lua", stacktrace);
+
 			FatalErrorOccurred = true;
 		}