quantum-space-buddies/UnityProject/Assets/Editor/AssetBundles.cs

using UnityEditor;
using System.IO;

public class CreateAssetBundles {
    [MenuItem("Assets/Build AssetBundles")]
    static void BuildAllAssetBundles () {
        string assetBundleDirectory = "../AssetBundles";
        if (!Directory.Exists(assetBundleDirectory)) {
            Directory.CreateDirectory(assetBundleDirectory);
        }
        BuildPipeline.BuildAssetBundles(assetBundleDirectory,
                                        BuildAssetBundleOptions.None,
                                        BuildTarget.StandaloneWindows);
    }
}