ReloadNeoLuaTest.cs

// Example of reloading scripts on the fly with IronLua
// Test.lua here: https://gist.github.com/thoj/fee42fabc82b74e422bff3766cbcc8a8

using System;
using Neo.IronLua;
using System.Threading;
using System.IO;

namespace LuaTest
{
    class SomeObject
    {
        public string data = "somedata";
        public int counter = 0;
        public SomeObject (string data)
        {
            this.data = data;
        }
    }

    class Program
    {
        private static bool scripts_changed = true;
        private static Lua lua;
        private static LuaGlobal global;

        static void Main(string[] args)
        {
            FileSystemWatcher watcher = new FileSystemWatcher();
            watcher.Path = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
            watcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName;
            watcher.Filter = "*.lua";
            watcher.Changed += (o, e) => { scripts_changed = true; };
            watcher.EnableRaisingEvents = true;

            while (true)
            {
                RunScript();
                Thread.Sleep(100);
            }           
        }

        static void RunScript()
        {
            if (scripts_changed)
            {
                Console.WriteLine("Script Changed ...");
                try
                {
                    object old = null;
                    if (global != null && global["SomeObject"] != null) old = global["SomeObject"];
                    lua = new Lua();
                    var chunk = lua.CompileChunk("test.lua", new LuaCompileOptions() { DebugEngine = LuaStackTraceDebugger.Default });
                    global = lua.CreateEnvironment<LuaGlobal>();
                    global.DoChunk(chunk);
                    if (old == null) global.CallMember("INIT");
                    else global["SomeObject"] = old;
                }
                catch (LuaParseException e)
                {
                    Console.WriteLine("Parse Error: {0} Line: {1:N0} Col: {2:N0} in {3}", e.Message, e.Line, e.Column, e.FileName);
                    Thread.Sleep(1000);
                    return;
                }
                catch (Exception e)
                {
                    var d = LuaExceptionData.GetData(e); // get stack trace
                    Console.WriteLine("Exception: {0}", e.Message);
                    Console.WriteLine("Exception: {0}", d.StackTrace);
                    Thread.Sleep(1000);
                    return;
                }
                finally
                {
                    global["Ready"] = false;
                    scripts_changed = false;
                }
            }
            global["Ready"] = true;

            try
            {
                global.CallMember("MAIN");
            }
            catch (Exception e)
            {

                var d = LuaExceptionData.GetData(e); // get stack trace
                Console.WriteLine("Runtime Error: {0}", e.Message);
                Console.WriteLine("Runtime Error: {0}", d.StackTrace);
                Thread.Sleep(1000);
                scripts_changed = true;
            }
        }
    }
}