Folder to package.tgz

PackageCreator.cs

#if UNITY_EDITOR
using System.IO;
using UnityEditor;
using UnityEditor.PackageManager;
using UnityEditor.PackageManager.Requests;
public static class PackageCreator
{
    public static void CreateTgzPackage(string packagePath, string sourcePath)
    {
        PackRequest packRequest = Client.Pack(sourcePath, packagePath);
        //
        while (!packRequest.IsCompleted) System.Threading.Thread.Sleep(10);
        // Check for errors
        if (packRequest.Status == StatusCode.Failure)
        {
            UnityEngine.Debug.LogError($"Failed to create package. Error: {packRequest.Error.message}");
            throw new IOException($"Failed to create package. Error: {packRequest.Error.message}");
        }
    }
    [MenuItem("Assets/Create package.tgz", false, 0)] private static void CustomOption()
    {
        DefaultAsset selectedFolder = Selection.activeObject as DefaultAsset;
        if (selectedFolder != null)
        {
            string folderPath = AssetDatabase.GetAssetPath(selectedFolder);
            string targetFolder = EditorUtility.OpenFolderPanel("Select target folder", "", "");

            if (!string.IsNullOrEmpty(targetFolder))
            {
                CreateTgzPackage(targetFolder, folderPath);
                AssetDatabase.Refresh();
            }
        }
    }
    [MenuItem("Assets/Create .tgz", true)] private static bool ValidateCustomOption() =>Selection.activeObject is DefaultAsset;
}
#endif