Automatically set Project Root Namespace

ProjectInitializer.cs

using System.IO;
using UnityEditor;
using UnityEngine;

namespace Rovsau.Unity.Editor.RunOnce
{
    // Sets a root namespace for the project,  
    // then self destructs. 

    // Output: 
    // RootNameSpacePrefix + ProjectFolderName
    
    [InitializeOnLoad]
    public class ProjectInitializer
    {
        private const string RootNameSpacePrefix = "MyNamespace.";  // <------ Edit this

        static ProjectInitializer()
        {
            Debug.Log("<ProjectInitializer>");
            SetRootNamespace();
            SelfDestruct();
        }

        private static void SetRootNamespace()
        {
            string project = Directory.GetCurrentDirectory();
            string projectName = Path.GetFileName(project).Replace(" ", "");
            EditorSettings.projectGenerationRootNamespace = RootNameSpacePrefix + projectName;

            Debug.Log("Project Root Namespace: \t" + EditorSettings.projectGenerationRootNamespace);
        }

        private static void SelfDestruct([System.Runtime.CompilerServices.CallerFilePath] string path = "")
        {
            path = Path.GetRelativePath(Directory.GetCurrentDirectory(), path);
            Debug.Log("</ProjectInitializer self destructed>");
            AssetDatabase.DeleteAsset(path);
        }
    } 
}