Explicit script exection order for Unity scripts

ExecutionOrderManager.cs

using System;
using UnityEditor;

[InitializeOnLoad]
public class ExecutionOrderManager : Editor
{
    static ExecutionOrderManager()
    {
        foreach (MonoScript monoScript in MonoImporter.GetAllRuntimeMonoScripts())
        {
            Type type = monoScript.GetClass();
            if (type == null)
            {
                continue;
            }

            object[] attributes = type.GetCustomAttributes(typeof(ScriptExecutionOrderAttribute), true);

            if (attributes.Length == 0)
            {
                continue;
            }

            ScriptExecutionOrderAttribute attribute = (ScriptExecutionOrderAttribute)attributes[0];
            if (MonoImporter.GetExecutionOrder(monoScript) != attribute.GetOrder())
            {
                MonoImporter.SetExecutionOrder(monoScript, attribute.GetOrder());
            }
        }
    }
}

ScriptExecutionOrderAttribute.cs

using System;

[AttributeUsage(AttributeTargets.Class)]
public class ScriptExecutionOrderAttribute : Attribute
{
    private int order = 0;

    public ScriptExecutionOrderAttribute(int order)
    {
        this.order = order;
    }

    public int GetOrder()
    {
        return order;
    }
}