Made google_auth Depedent Code Block Optional, It will execute only if google_auth is installed.

Author: shivanand007

kubernetes/base/config/kube_config.py

@@ -25,8 +25,6 @@
 import time
 from collections import namedtuple
 
-import google.auth
-import google.auth.transport.requests
 import oauthlib.oauth2
 import urllib3
 import yaml
@@ -44,6 +42,15 @@
 except ImportError:
     pass
 
+try:
+    import google.auth
+    import google.auth.transport.requests
+    google_auth_available = True
+except ImportError:
+    google_auth_available = False
+
+
+
 EXPIRY_SKEW_PREVENTION_DELAY = datetime.timedelta(minutes=5)
 KUBE_CONFIG_DEFAULT_LOCATION = os.environ.get('KUBECONFIG', '~/.kube/config')
 ENV_KUBECONFIG_PATH_SEPARATOR = ';' if platform.system() == 'Windows' else ':'
@@ -239,15 +246,19 @@ def _refresh_credentials():
                 'config' in self._user['auth-provider'] and
                     'cmd-path' in self._user['auth-provider']['config']):
                 return _refresh_credentials_with_cmd_path()
-
-            credentials, project_id = google.auth.default(scopes=[
-                'https://www.googleapis.com/auth/cloud-platform',
-                'https://www.googleapis.com/auth/userinfo.email'
-            ])
-            request = google.auth.transport.requests.Request()
-            credentials.refresh(request)
-            return credentials
-
+            
+            # Make the Google auth block optional.
+            if google_auth_available:
+                credentials, project_id = google.auth.default(scopes=[
+                    'https://www.googleapis.com/auth/cloud-platform',
+                    'https://www.googleapis.com/auth/userinfo.email'
+                ])
+                request = google.auth.transport.requests.Request()
+                credentials.refresh(request)
+                return credentials
+            else:
+                return None
+            
         if get_google_credentials:
             self._get_google_credentials = get_google_credentials
         else:

setup.py

@@ -29,7 +29,7 @@
 
 EXTRAS = {
     'adal': ['adal>=1.0.2'],
-    'google-auth': ['google-auth>=1.0.0']
+    'google-auth': ['google-auth>=1.0.1']
 }
 REQUIRES = []
 with open('requirements.txt') as f: