Can Runtime compiled scripts access each other

Questions & Answers
1

Hi im a trying to compile scripts and attach them to objects at runtime and make them communicate each other.

I am using .NET 2.0 and the code i found here from exodrifter on the forums to achive the compilation and use reflection on the compiled object to attach itself to an object
the code i use to achive that is pasted below

using Microsoft.CSharp;
using System;
using System.CodeDom.Compiler;
using System.Reflection;
using System.Text;
using UnityEngine;
 
public class CompilerExample : MonoBehaviour
{
    void Start()
    {
        var assembly = Compile(@"
        using UnityEngine;
 
        public class Test
        {
            public static void Foo()
            {
                Debug.Log(""Hello, World!"");
            }
        }");
 
        var method = assembly.GetType("Test").GetMethod("Foo");
        var del = (Action)Delegate.CreateDelegate(typeof(Action), method);
        del.Invoke();
    }
 
    public static Assembly Compile(string source)
    {
        var provider = new CSharpCodeProvider();
        var param = new CompilerParameters();
 
        // Add ALL of the assembly references
        foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
        {
            param.ReferencedAssemblies.Add(assembly.Location);
        }
 
        // Add specific assembly references
        //param.ReferencedAssemblies.Add("System.dll");
        //param.ReferencedAssemblies.Add("CSharp.dll");
        //param.ReferencedAssemblies.Add("UnityEngines.dll");
 
        // Generate a dll in memory
        param.GenerateExecutable = false;
        param.GenerateInMemory = true;
 
        // Compile the source
        var result = provider.CompileAssemblyFromSource(param, source);
 
        if (result.Errors.Count > 0) {
            var msg = new StringBuilder();
            foreach (CompilerError error in result.Errors) {
                msg.AppendFormat("Error ({0}): {1}

",
error.ErrorNumber, error.ErrorText);
}
throw new Exception(msg.ToString());
}

        // Return the assembly
        return result.CompiledAssembly;
    }
}

The problem is this method only works with unitys built in funtions and variables such as transform.Rotate when i try to attach a runtime script like this to an object

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Scream : MonoBehaviour {

	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {

        //tellName();
        	
	}

    public void tellName() {

        Debug.Log("I am the " + transform.gameObject.name);


    }

}

and this to another object at runtime

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Caller : MonoBehaviour {

    GameObject go;
    Scream sc;


	// Use this for initialization
	void Start () {

         go = GameObject.Find("GreenCube");
        sc = (Scream)go.GetComponent(typeof(Scream)) as Scream;
        
    }
	
	// Update is called once per frame
	void Update () {

        sc.tellName();

    }
}

I cannot manage to call the function from the runtimeAdded scripts because unity doesnt realise that the runtime created script has the declared method and throws namespace or type cannot be found error.

Hope i can make my promlem clear. Is there a way to achive this or am i out of luck.

2

Your compilation code needs to reference the assembly you compiled earlier. As you can see inside the Compile method you build a CompilerParameters object which has the ReferencedAssemblies collection.

The code iterates through all loaded assemblies and add their Location to the ReferencedAssemblies collection. However this does not work for dynamically created assemblies as they do not have a location / path on disk. Location will return an empty string for dynamically loaded or created assemblies. Actually according to the documentation dynamically created assemblies should throw a NotSupportedException when you try reading the Location.

It doesn’t seem that there is a way to add a dynamically created assembly to the referenced assemblies collection as it only accepts a path to the assembly. So you would need to compile each assembly into a folder on disk so you can actually reference it when compiling your second assembly.

3

@Bunny83

Then you suggest that after each new script creation i should create a seperate .dll file in the desired path and then let the ReferencedAssemblies list include that to the domain as well. Do you think i can do this at runtime in unity ?