AssetBundlerBuilder.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System.Linq;
using System.IO;
using System;
using UnityEngine.Rendering;

public class AssetBundlerBuilder : Editor
{

    [MenuItem("Assets/Asset Bundle/Build for iOS")]
    public static void BuildAssetBundle_iOS()
    {
        var path = Application.dataPath + Path.DirectorySeparatorChar + "AssetBundles" + Path.DirectorySeparatorChar + "ios";
        BuildAssetBundle(path, BuildTarget.iOS);
    }

    [MenuItem("Assets/Asset Bundle/Build for Android")]
    public static void BuildAssetBundle_Android()
    {
        var path = Application.dataPath + Path.DirectorySeparatorChar + "AssetBundles" + Path.DirectorySeparatorChar + "android";
        BuildAssetBundle(path, BuildTarget.Android);
    }

    [MenuItem("Assets/Asset Bundle/Build for OS X")]
    public static void BuildAssetBundle_OSX()
    {
        var path = Application.dataPath + Path.DirectorySeparatorChar + "AssetBundles" + Path.DirectorySeparatorChar + "osx";
        BuildAssetBundle(path, BuildTarget.StandaloneOSXIntel64);
    }

    private static void BuildAssetBundle(string path, BuildTarget buildTarget)
    {
        if (Selection.activeObject == null) return;

        if (!Directory.Exists(path)) Directory.CreateDirectory(path);

        var assets = EditorUtility.CollectDependencies(new UnityEngine.Object[] { Selection.activeObject })
                                  .Select(x => AssetDatabase.GetAssetPath(x))
                                  .Distinct()
                                  .ToArray();

        Debug.Log(assets.Count());

        var builds = new AssetBundleBuild[]{
            new AssetBundleBuild{
                assetNames = assets,
                assetBundleName = Selection.activeObject.name
            }};

        BuildPipeline.BuildAssetBundles(path, builds, BuildAssetBundleOptions.ForceRebuildAssetBundle, buildTarget);
    }
}