Maintains a renamed copy of certain Unity Resources asset files in your project. For example, by default Unity won't include SVG files as text XML for further processing.

AssetImportRenamer.cs

// Maintains a renamed copy of certain Unity Resources asset files in your project.
// E.g. by default Unity won't include SVG files as XML for further processing.
//
// Put this file in the Assets/Editor folder.
//
// This script automatically rename resource files with a .txt (text) or .bytes (binary) extension,
// to be readable as Resources.Load<TextAssets>(path).text or Resources.Load(path) as byte[].
// 
// 
// License: CC0

using UnityEditor;
using UnityEngine;
using System.IO;

public class AssetImportRenamer : AssetPostprocessor
{
    // lists of file extensions to rename...
    static string[] textExtensions = { ".svg" };
    static string[] binaryExtensions = { };

    // Where to put the renamed copies (empty string or "MySubfolder/")...
    const string putCopiesInFolder = "AutoGenerated/";

    public static void OnPostprocessAllAssets(string[] importedAssets, string[] deletedAssets, string[] movedAssets, string[] movedFromAssetPaths)
    {
        foreach (string asset in importedAssets)
        {
            string extension;
            int indexOfDot = asset.LastIndexOf('.');
            if (indexOfDot == -1)
                extension = "";
            else
                extension = asset.Substring(indexOfDot);
            string newExtension;
            if (extension.Length == 0) continue;
            else if (System.Array.IndexOf(textExtensions,extension) != -1) newExtension = ".txt";
            else if (System.Array.IndexOf(binaryExtensions,extension) != -1) newExtension = ".bytes";
            else continue;

            string filePath = asset.Substring(0, asset.Length - Path.GetFileName(asset).Length) + putCopiesInFolder;
            string newFileName = filePath + Path.GetFileName(asset) + newExtension;
            if (!Directory.Exists(filePath))
                Directory.CreateDirectory(filePath);
            StreamReader reader = new StreamReader(asset);
            string fileData = reader.ReadToEnd();
            reader.Close();

            FileStream resourceFile = new FileStream(newFileName, FileMode.OpenOrCreate, FileAccess.Write);
            StreamWriter writer = new StreamWriter(resourceFile);
            writer.Write(fileData);
            writer.Close();
            resourceFile.Close();
            AssetDatabase.Refresh(ImportAssetOptions.Default);
        }
    }

}