Unity Add Default Namespace to Script Template?

There is no built-in template variables like #FOLDERNAME#.

According to this post, there are only 3 magic variables.

• "#NAME#"
• "#SCRIPTNAME#"
• "#SCRIPTNAME_LOWER#"

But you can always hook into the creation process of a script and append the namespace yourself using AssetModificationProcessor.

Here is an example that adds some custom data to the created script.

//Assets/Editor/KeywordReplace.cs
using UnityEngine;
using UnityEditor;
using System.Collections;

public class KeywordReplace : UnityEditor.AssetModificationProcessor
{

   public static void OnWillCreateAsset ( string path )
   {
     path = path.Replace( ".meta", "" );
     int index = path.LastIndexOf( "." );
     string file = path.Substring( index );
     if ( file != ".cs" && file != ".js" && file != ".boo" ) return;
     index = Application.dataPath.LastIndexOf( "Assets" );
     path = Application.dataPath.Substring( 0, index ) + path;
     file = System.IO.File.ReadAllText( path );

     file = file.Replace( "#CREATIONDATE#", System.DateTime.Now + "" );
     file = file.Replace( "#PROJECTNAME#", PlayerSettings.productName );
     file = file.Replace( "#SMARTDEVELOPERS#", PlayerSettings.companyName );

     System.IO.File.WriteAllText( path, file );
     AssetDatabase.Refresh();
   }
}

Using zwcloud's answer and some other resources I was able to generate a namespace on my script files:

First step, navigate:

Unity's default templates can be found under your Unity installation's directory in Editor\Data\Resources\ScriptTemplates for Windows and /Contents/Resources/ScriptTemplates for OSX.

And open the file 81-C# Script-NewBehaviourScript.cs.txt

And make the following change:

namespace #NAMESPACE# {

At the top and

}

At the bottom. Indent the rest so that the whitespace is as desired. Don't save this just yet. If you wish, you can make other changes to the template, such as removing the default comments, making Update() and Start() private, or even removing them entirely.

Again, do not save this file yet or Unity will throw an error on the next step. If you saved, just hit ctrl-Z to undo and then resave, then ctrl-Y to re-apply the changes.

Now create a new script inside an Editor folder inside your Unity Assets directory and call it AddNameSpace. Replace the contents with this:

using UnityEngine;
using UnityEditor;

public class AddNameSpace : UnityEditor.AssetModificationProcessor {

    public static void OnWillCreateAsset(string path) {
        path = path.Replace(".meta", "");
        int index = path.LastIndexOf(".");
        if(index < 0) return;
        string file = path.Substring(index);
        if(file != ".cs" && file != ".js" && file != ".boo") return;
        index = Application.dataPath.LastIndexOf("Assets");
        path = Application.dataPath.Substring(0, index) + path;
        file = System.IO.File.ReadAllText(path);

        string lastPart = path.Substring(path.IndexOf("Assets"));
        string _namespace = lastPart.Substring(0, lastPart.LastIndexOf('/'));
        _namespace = _namespace.Replace('/', '.');
        file = file.Replace("#NAMESPACE#", _namespace);

        System.IO.File.WriteAllText(path, file);
        AssetDatabase.Refresh();
    }
}

Save this script as well as saving the changes to 81-C# Script-NewBehaviourScript.cs.txt

And you're done! You can test it by creating a new C# script inside any series of folders inside Assets and it will generate the new namespace definition we created.