Roll version of gsutil to 4.15.

third_party/gsutil/gslib/storage_url.py

 # -*- coding: utf-8 -*-
 # Copyright 2013 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
@@ skipping 87 matching lines @@
 
   @property
   def url_string(self):
     raise NotImplementedError('url_string not overridden')
 
   @property
   def versionless_url_string(self):
     raise NotImplementedError('versionless_url_string not overridden')
 
   def __eq__(self, other):
-    return self.url_string == other.url_string
+    return isinstance(other, StorageUrl) and self.url_string == other.url_string
 
   def __hash__(self):
     return hash(self.url_string)
 
 
 class _FileUrl(StorageUrl):
   """File URL class providing parsing and convenience methods.
 
     This class assists with usage and manipulation of an
     (optionally wildcarded) file URL string.  Depending on the string
@@ skipping 196 matching lines @@
 def ContainsWildcard(url_string):
   """Checks whether url_string contains a wildcard.
 
   Args:
     url_string: URL string to check.
 
   Returns:
     bool indicator.
   """
   return bool(WILDCARD_REGEX.search(url_string))