From 1fb664ef52facea690f5046512fd168f12191ca7 Mon Sep 17 00:00:00 2001
From: Yiming Yang <yang.yihming@gmail.com>
Date: Fri, 6 May 2022 18:18:32 -0400
Subject: [PATCH] bug fix for AWS backend cp

---
 strato/backends/_aws.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/strato/backends/_aws.py b/strato/backends/_aws.py
index dcd6f64..68e9e52 100644
--- a/strato/backends/_aws.py
+++ b/strato/backends/_aws.py
@@ -1,7 +1,7 @@
 import os, shutil
 import boto3
 from subprocess import check_call, CalledProcessError
-from typing import Optional
+
 
 def parse_wildcard(filepath):
     prefix = "s3://" if filepath.startswith("s3://") else ""
@@ -14,6 +14,9 @@ def parse_wildcard(filepath):
     assert wd_idx != -1, "The given path doesn't contain wildcard!"
 
     parent_folder = prefix + '/'.join(fp_list[0:wd_idx])
+    if parent_folder == "" and prefix == "":
+        parent_folder = "."
+
     wildcard = '/'.join(fp_list[wd_idx:])
 
     return parent_folder, wildcard