func Tesses.CrossLang.Shell.Run(dd)
{
    var offline=false;
    var buildPath = ".";
    var nobuild=false;
    var allowFullCompTime=false;
    var output="";   
    each(var flag : dd.Flags)
    {
        if(flag == "offline")
        {
            offline = true;
        }
        else if(flag == "allow-insecure-comptime")
        {
            allowFullCompTime=true;
        }
        else if(flag == "help")
        {
            Console.WriteLine("USAGE: crosslang run [run-flags-and-options] program-arguments...");
            Console.WriteLine("USAGE: crosslang run [run-flags-and-options] -- program-arguments-and-options...");
            Console.WriteLine("FLAGS:");
            Console.WriteLine("offline:                 build with no internet (don't fetch files)");
            Console.WriteLine("allow-insecure-comptime: Allow full comptime");
            Console.WriteLine("nobuild:                 don't build, just run");
            Console.WriteLine("help:                    this help");
            Console.WriteLine();
            Console.WriteLine("OPTIONS:");
            Console.WriteLine("conf=CONFIGSTRING:  specify a conf string for compile_tool(s), is the property Config");
            return 0;
        }
        else if(flag == "nobuild")
        {
            nobuild=true;
        }
    }
    var conf = "";
    each(var option : dd.Options)
    {
        if(option.Key == "conf")
        {
            conf = option.Value;
        }
    }
    if(nobuild)
    {
        if(FS.Local.FileExists("config.json"))
        {
            var proj = Json.Decode(FS.ReadAllText(FS.Local, "config.json"));
            var nameVer = $"{proj.name}-{proj.version}.crvm";
            var buildDir = TypeOf(proj.bin_directory) == "String" ? proj.bin_directory : "bin";
                    
            output = ./buildDir/nameVer;
            if(!FS.Local.FileExists(output))
            {
                Console.WriteLine($"ERROR: file {output} does not exist.");
            }
        }
        else
        {
            Console.WriteLine("ERROR: could not find project.");
            return 1;
        }
    }
    else
    {
        var pm = Tesses.CrossLang.PackageManager();
        pm.Offline = offline;
        var bt = Tesses.CrossLang.BuildTool(pm);
        bt.Config = conf;
        bt.AllowFullCompTime = allowFullCompTime;
        output =  bt.BuildProject(buildPath).Output;
    }
    var env = VM.CreateEnvironment({});
    env.RegisterEverything();
    env.LockRegister();

    env.LoadFileWithDependencies(FS.Local,output);
    var myArgs = [output.ToString()];
    for(var i = 1; i < dd.Arguments.Count; i++)
    {
        myArgs.Add(dd.Arguments[i]);
    }
    return env.GetDictionary().main(myArgs);
}