Unity5で選択したファイルにアセットバンドルの名前を自動で付ける

Build.cs

using UnityEngine;
using UnityEditor;
using System.Collections;
using System.IO;

public class BuildScript
{
    const string kAssetBundlesOutputPath = "AssetBundles";

    // アセットバンドル化するフォルダの設置場所
    private static string assetTopDir = "Assets/Data/";     // ※大文字小文字は区別される

    [MenuItem( "AssetBundles/Build AssetBundles" )]
    public static void BuildAssetBundles()
    {
        // Choose the output path according to the build target.
        string outputPath = Path .Combine(kAssetBundlesOutputPath, "");
        if (!Directory .Exists(outputPath))
            Directory.CreateDirectory(outputPath);

        BuildPipeline.BuildAssetBundles(outputPath, BuildAssetBundleOptions.None, EditorUserBuildSettings.activeBuildTarget);
    }

    private static void SetAssetName(Object obj)
    {
        var path = AssetDatabase.GetAssetPath(obj);
        // AssetImporterも取得
        AssetImporter importer = AssetImporter.GetAtPath(path);

        if (path.IndexOf("Resources/" ) >= 0)
            return;

        string abname = path.Replace(assetTopDir, "");
        int idx = abname.LastIndexOf('.' );
        if (idx != -1)
        {
            abname = abname.Substring(0, idx) + ".unity3d";
        }
        else
        {
            abname = path;
        }
        importer.assetBundleName = abname;
        importer.assetBundleVariant = "";

    }

    [MenuItem( "Assets/Set Assetbundle name" )]
    public static void SelectionAsset()
    {
        // Build the resource file from the active selection.
        Object[] selection = Selection.GetFiltered(typeof( Object), SelectionMode .DeepAssets);

        foreach (var obj in selection)
        {
            SetAssetName(obj);
        }

    }
}

Unity5で、Editorフォルダの中に入れると、選択したアセットに一括でそのファイル名と同じアセットバンドル名が付くようになります。
In Unity5, you put in the Editor folder, same the filename and iassetbundle name attached at once to the selected asset.