Fix standard lib pathes

GamecraftScripting/Commands/DebugCommandEngine.cs

@@ -14,15 +14,15 @@ namespace GamecraftScripting.Commands
 {
     class DebugCommandEngine : ICustomCommandEngine
     {
-        public string Description { get; } = "";
+        public string Description { get; } = "Display Python debug info";
 
-        public string Name { get; } = "";
+        public string Name { get; } = "PythonInfo";
 
         public IEntitiesDB entitiesDB { set; private get; }
 
         public void Dispose()
         {
-            CommandRegistrationHelper.Unregister("IronPythonInfo");
+            CommandRegistrationHelper.Unregister("PythonInfo");
         }
 
         public void Ready()
@@ -32,7 +32,7 @@ namespace GamecraftScripting.Commands
 
         private void ironPythonInfo()
         {
-            Logging.CommandLog(typeof(PythonOptions).Assembly.GetName().ToString());
+            Logging.CommandLog($"Assembly {typeof(PythonOptions).Assembly.GetName().ToString()}");
         }
     }
 }

GamecraftScripting/Commands/PythonRunnerCommandEngine.cs

@@ -5,14 +5,18 @@ using System.Numerics;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Security.Policy;
 
 using GamecraftModdingAPI.Commands;
 using GamecraftModdingAPI.Utility;
 using Svelto.ECS;
+using RobocraftX.Common;
 
 using IronPython.Hosting;
 using Microsoft.Scripting.Hosting;
 
+using GamecraftScripting.Environment;
+
 namespace GamecraftScripting.Commands
 {
     class PythonRunnerCommandEngine : ICustomCommandEngine
@@ -23,25 +27,85 @@ namespace GamecraftScripting.Commands
 
         public IEntitiesDB entitiesDB { set; private get; }
 
-        private ScriptEngine pythonEngine;
+        private ScriptEngine pyEngine;
 
         private ScriptScope gameScope;
 
         public void Dispose()
         {
             CommandRegistrationHelper.Unregister("RunPythonScript");
+            CommandRegistrationHelper.Unregister("RunPython");
         }
 
         public void Ready()
         {
             CommandRegistrationHelper.Register<string>("RunPythonScript", RunPythonScript, "Run a python script stored on your computer");
-            this.pythonEngine = Python.CreateEngine();
-            this.gameScope = pythonEngine.CreateScope();
+            CommandRegistrationHelper.Register<string>("RunPython", RunPythonString, "Run a python argument");
+            // create insecure Python namespace
+            CreateFreeInstance();
+            // make "import GamecraftModdingAPI" work without the clr boilerplate
+            pyEngine.Execute("import clr\nclr.AddReference(\"GamecraftModdingAPI\")", gameScope);
+            ICollection<string> searchPaths = pyEngine.GetSearchPaths();
+            searchPaths.Add(@".\Lib\");
+            searchPaths.Add(@".\Gamecraft_Data\Managed\Lib\");
+            pyEngine.SetSearchPaths(searchPaths);
+            Logging.MetaLog(string.Join(", ", pyEngine.GetSearchPaths().ToArray()));
         }
 
         private void RunPythonScript(string scriptPath)
         {
-            pythonEngine.ExecuteFile(scriptPath, gameScope);
+            string script = File.ReadAllText(scriptPath);
+            ExecuteScript(script);
+        }
+
+        private void RunPythonString(string expression)
+        {
+            ExecuteScript(expression);
+        }
+
+        private void ExecuteScript(string script, bool logError=true)
+        {
+            ScriptSource src = pyEngine.CreateScriptSourceFromString(script);
+            try
+            {
+                src.Execute(gameScope);
+            }
+            catch (Exception e)
+            {
+                if (logError)
+                {
+                    Logging.CommandLogError($"Python error: {e.Message}");
+                }
+                else
+                {
+                    throw e;
+                }
+                
+            }
+        }
+
+        /// <summary>
+        /// [Experimental] Create a Python instance without access to any(?) assemblies
+        /// </summary>
+        private void CreateSandboxedInstance()
+        {
+            Evidence evidence = new Evidence(); // an uninformative class name to limit accessible Assemblies
+            AppDomain domain = AppDomain.CreateDomain(GameMode.SaveGameDetails.Name, evidence);
+            this.pyEngine = Python.CreateEngine(domain);
+            PythonLogStream pyLog = new PythonLogStream();
+            pyEngine.Runtime.IO.SetOutput(pyLog, pyLog.Encoding);
+            this.gameScope = pyEngine.CreateScope();
+        }
+
+        /// <summary>
+        /// Create an unsecured Python instance
+        /// </summary>
+        private void CreateFreeInstance()
+        {
+            this.pyEngine = Python.CreateEngine();
+            PythonLogStream pyLog = new PythonLogStream();
+            pyEngine.Runtime.IO.SetOutput(pyLog, pyLog.Encoding);
+            this.gameScope = pyEngine.CreateScope();
         }
 
         public PythonRunnerCommandEngine()

GamecraftScripting/Environment/LogStream.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using GamecraftModdingAPI.Utility;
+
+namespace GamecraftScripting.Environment
+{
+    /// <summary>
+    /// Writeable Stream for Python's print function
+    /// </summary>
+    class PythonLogStream : Stream
+    {
+        public Encoding Encoding { get; set; } = Encoding.Default;
+
+        public override bool CanRead => false;
+
+        public override bool CanSeek => false;
+
+        public override bool CanWrite => true;
+
+        public override long Length => _length;
+
+        private long _length = 0L;
+
+        private StringBuilder strBuffer = new StringBuilder();
+
+        public override long Position { get => _length-1; set => throw new NotImplementedException(); }
+
+        public override void Flush()
+        {
+            if (strBuffer.Length > 0)
+            {
+                Logging.CommandLog(strBuffer.ToString().Trim());
+                strBuffer.Clear();
+            }
+        }
+
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override long Seek(long offset, SeekOrigin origin)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void SetLength(long value)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            byte[] realBuffer = new byte[count + offset];
+            for (int i = 0; i < realBuffer.Length-offset; i++)
+            {
+                realBuffer[i + offset] = buffer[i];
+            }
+            string toWrite = this.Encoding.GetString(realBuffer);
+            for (int i = 0; i < toWrite.Length; i++)
+            {
+                WriteChar(toWrite[i]);
+            }
+        }
+
+        public void WriteChar(char c)
+        {
+            if (c == '\n')
+            {
+                Flush();
+            } 
+            else if (c == '\r')
+            {
+                // Microsoft motto: Why use 1 when 2 will clearly be more bloated!
+            }
+            else
+            {
+                strBuffer.Append(c);
+            }
+        }
+    }
+}