Unity Layer To Enums

using UnityEngine;
using UnityEditor;

// For Unity3D: code-generates an enum file based on current project Layers
// by @kurtdekker
//
// Place in an Editor folder somewhere
//

public static class LayersToEnum
{
    // Move this or rename it however you like, as long as it is a C# file.
    const string EnumSourceFile = "Assets/UnityLayer.cs";

    // Move this menu item wherever you prefer to have it.
    [MenuItem( "Assets/Regenerate Layer Enums")]
    static void GenerateCode()
    {
        string code = "";

        code += "\n";

        code += "// CAUTION: auto-generated by LayersToEnum.GenerateCode()\n";
        code += "// by @kurtdekker\n";

        code += "\n";

        code += "// To use these in your script, simply make a public variable of this type,\n";
        code += "// and then you can meaningfully select the layer as human-readable.\n";

        code += "\n";

        code += "// If you change layers, be sure to regenerate with this code.\n";

        code += "\n";

        code += "// NOTE: You SHOULD commit this file to source control.\n";

        code += "\n";

        code += "public enum UnityLayer\n";

        code += "{\n";

        code += "// If you get compiler errors, see bottom of generator script\n";
        code += "// for how to get rid of bad characters and layer names.\n";
        code += "\n";

        for (int i = 0; i < 32; i++)
        {
            var s = LayerMask.LayerToName(i);
            if (!string.IsNullOrEmpty(s))
            {
                Debug.Log( System.String.Format( "{0} - '{1}'", i, s));

                var safeName = MakeSafeName(s);

                code += "\t" + safeName + " = " + i.ToString() + ",\n";
            }
        }

        code += "}\n";

        Debug.Log( code);

        System.IO.File.WriteAllText( EnumSourceFile, code);

        AssetDatabase.Refresh();
    }

    static string MakeSafeName( string s)
    {
        s = s.Replace( ' ', '_');

        // put any other silly non-identifier-safe
        // characters you find in your layers here
        // and make them safe for identifiers, and
        // don't do that anymore please. No spaces!

        // Also if you name one of your layers as a
        // C# keyword, that too will need to be
        // replaced here or else you'll get errors.

        return s;
    }
}