More debug info and a small refactor

Assets/Scripts/API/Lua/LuaManager.cs

@@ -167,12 +167,15 @@ public void Init()
                 Directory.CreateDirectory(LuaModulesPath);
             }
 
-            // Allow includes from Scripts/LuaModules
-            Script.DefaultOptions.ScriptLoader = new FileSystemScriptLoader();
-            ((ScriptLoaderBase)Script.DefaultOptions.ScriptLoader).ModulePaths = new[] { Path.Join(LuaModulesPath, "?.lua") };
-
             CopyLuaModules();
 
+            // Allow includes from Scripts/LuaModules
+            Script.DefaultOptions.ScriptLoader = new OpenBrushScriptLoader();
+            ((ScriptLoaderBase)Script.DefaultOptions.ScriptLoader).ModulePaths = new[]
+            {
+                Path.Join(LuaModulesPath, "?.lua")
+            };
+
             LoadExampleScripts();
             LoadUserScripts();
 
@@ -448,12 +451,12 @@ private string LoadScriptFromString(string scriptFilename, string contents, bool
             }
             catch (ScriptRuntimeException e)
             {
-                LogLuaInterpreterError(script, $"(ScriptRuntimeException loading: {scriptFilename})", e);
+                LogLuaInterpreterError(script, $"(Runtime Error loading: {scriptFilename})", e);
                 return null;
             }
             catch (SyntaxErrorException e)
             {
-                LogLuaInterpreterError(script, $"(SyntaxErrorException loading: {scriptFilename})", e);
+                LogLuaInterpreterError(script, $"(Syntax Error loading: {scriptFilename})", e);
                 return null;
             }
             var catMatch = TryGetCategoryFromScriptName(scriptFilename);
@@ -462,18 +465,8 @@ private string LoadScriptFromString(string scriptFilename, string contents, bool
                 var category = catMatch.Value;
                 scriptName = scriptFilename.Substring(category.ToString().Length + 1);
 
-                try {script.Globals[LuaNames.ScriptNameString] = scriptName;}
-                catch (ScriptRuntimeException e)
-                {
-                    LogLuaInterpreterError(script, $"(ScriptRuntimeException setting ScriptNameString: {scriptFilename})", e);
-                    return null;
-                }
-                try { script.Globals[LuaNames.IsExampleScriptBool] = isExampleScript; }
-                catch (ScriptRuntimeException e)
-                {
-                    LogLuaInterpreterError(script, $"(ScriptRuntimeException setting IsExampleScriptBool: {scriptFilename})", e);
-                    return null;
-                }
+                script.Globals[LuaNames.ScriptNameString] = scriptName;
+                script.Globals[LuaNames.IsExampleScriptBool] = isExampleScript;
 
                 Scripts[category][scriptName] = script;
                 if (m_ActiveBackgroundScripts.ContainsKey(scriptName))

Assets/Scripts/API/Lua/OpenBrushScriptLoader.cs

@@ -0,0 +1,37 @@
+// Copyright 2023 The Open Brush Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using MoonSharp.Interpreter;
+using MoonSharp.Interpreter.Loaders;
+using System.IO;
+using UnityEngine;
+
+namespace TiltBrush
+{
+    public class OpenBrushScriptLoader : ScriptLoaderBase
+    {
+        public override bool ScriptFileExists(string name)
+        {
+            Debug.Log($"ScriptFileExists: {name}? {File.Exists(name)}");
+            return File.Exists(name);
+        }
+
+        public override object LoadFile(string file, Table globalContext)
+        {
+            FileStream result = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
+            Debug.Log($"LoadFile: {file} CanRead? {result.CanRead}");
+            return result;
+        }
+    }
+}