Better credentials store error handling in resolve_authconfig

Signed-off-by: Joffrey F <joffrey@docker.com>

docker/auth/auth.py

@@ -106,8 +106,6 @@ def _resolve_authconfig_credstore(authconfig, registry, credstore_name):
         # docker.io - in that case, it seems the full URL is necessary.
         registry = 'https://index.docker.io/v1/'
     log.debug("Looking for auth entry for {0}".format(repr(registry)))
-    if registry not in authconfig:
-        log.debug("No entry found")
     store = dockerpycreds.Store(credstore_name)
     try:
         data = store.get(registry)
@@ -122,10 +120,13 @@ def _resolve_authconfig_credstore(authconfig, registry, credstore_name):
                 'Password': data['Secret'],
             })
         return res
+    except dockerpycreds.CredentialsNotFound as e:
+        log.debug('No entry found')
+        return None
     except dockerpycreds.StoreError as e:
-        log.error('Credentials store error: {0}'.format(repr(e)))
-
-    return None
+        raise errors.DockerException(
+            'Credentials store error: {0}'.format(repr(e))
+        )
 
 
 def convert_to_hostname(url):

requirements.txt

@@ -3,4 +3,4 @@ six>=1.4.0
 websocket-client==0.32.0
 backports.ssl_match_hostname>=3.5 ; python_version < '3.5'
 ipaddress==1.0.16 ; python_version < '3.3'
-docker-pycreds==0.1.0
+docker-pycreds==0.2.0

setup.py

@@ -12,7 +12,7 @@ requirements = [
     'requests >= 2.5.2, < 2.11',
     'six >= 1.4.0',
     'websocket-client >= 0.32.0',
-    'docker-pycreds >= 0.1.0'
+    'docker-pycreds >= 0.2.0'
 ]
 
 if sys.platform == 'win32':