Allow passing of env overrides to credstore through APIClient ctor

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

docker/api/build.py

@@ -302,7 +302,8 @@ class BuildApiMixin(object):
                 # credentials/native_store.go#L68-L83
                 for registry in self._auth_configs.get('auths', {}).keys():
                     auth_data[registry] = auth.resolve_authconfig(
-                        self._auth_configs, registry
+                        self._auth_configs, registry,
+                        credstore_env=self.credstore_env,
                     )
             else:
                 auth_data = self._auth_configs.get('auths', {}).copy()

docker/api/client.py

@@ -83,6 +83,8 @@ class APIClient(
             :py:class:`~docker.tls.TLSConfig` object to use custom
             configuration.
         user_agent (str): Set a custom user agent for requests to the server.
+        credstore_env (dict): Override environment variables when calling the
+            credential store process.
     """
 
     __attrs__ = requests.Session.__attrs__ + ['_auth_configs',
@@ -93,7 +95,8 @@ class APIClient(
 
     def __init__(self, base_url=None, version=None,
                  timeout=DEFAULT_TIMEOUT_SECONDS, tls=False,
-                 user_agent=DEFAULT_USER_AGENT, num_pools=DEFAULT_NUM_POOLS):
+                 user_agent=DEFAULT_USER_AGENT, num_pools=DEFAULT_NUM_POOLS,
+                 credstore_env=None):
         super(APIClient, self).__init__()
 
         if tls and not base_url:
@@ -109,6 +112,7 @@ class APIClient(
         self._auth_configs = auth.load_config(
             config_dict=self._general_configs
         )
+        self.credstore_env = credstore_env
 
         base_url = utils.parse_host(
             base_url, IS_WINDOWS_PLATFORM, tls=bool(tls)

docker/api/daemon.py

@@ -128,7 +128,9 @@ class DaemonApiMixin(object):
         elif not self._auth_configs:
             self._auth_configs = auth.load_config()
 
-        authcfg = auth.resolve_authconfig(self._auth_configs, registry)
+        authcfg = auth.resolve_authconfig(
+            self._auth_configs, registry, credstore_env=self.credstore_env,
+        )
         # If we found an existing auth config for this registry and username
         # combination, we can return it immediately unless reauth is requested.
         if authcfg and authcfg.get('username', None) == username \

docker/auth.py

@@ -44,7 +44,9 @@ def get_config_header(client, registry):
             "No auth config in memory - loading from filesystem"
         )
         client._auth_configs = load_config()
-    authcfg = resolve_authconfig(client._auth_configs, registry)
+    authcfg = resolve_authconfig(
+        client._auth_configs, registry, credstore_env=client.credstore_env
+    )
     # Do not fail here if no authentication exists for this
     # specific registry as we can have a readonly pull. Just
     # put the header if we can.
@@ -76,7 +78,7 @@ def get_credential_store(authconfig, registry):
     )
 
 
-def resolve_authconfig(authconfig, registry=None):
+def resolve_authconfig(authconfig, registry=None, credstore_env=None):
     """
     Returns the authentication data from the given auth configuration for a
     specific registry. As with the Docker client, legacy entries in the config
@@ -91,7 +93,7 @@ def resolve_authconfig(authconfig, registry=None):
                 'Using credentials store "{0}"'.format(store_name)
             )
             cfg = _resolve_authconfig_credstore(
-                authconfig, registry, store_name
+                authconfig, registry, store_name, env=credstore_env
             )
             if cfg is not None:
                 return cfg
@@ -115,13 +117,14 @@ def resolve_authconfig(authconfig, registry=None):
     return None
 
 
-def _resolve_authconfig_credstore(authconfig, registry, credstore_name):
+def _resolve_authconfig_credstore(authconfig, registry, credstore_name,
+                                  env=None):
     if not registry or registry == INDEX_NAME:
         # The ecosystem is a little schizophrenic with index.docker.io VS
         # docker.io - in that case, it seems the full URL is necessary.
         registry = INDEX_URL
     log.debug("Looking for auth entry for {0}".format(repr(registry)))
-    store = dockerpycreds.Store(credstore_name)
+    store = dockerpycreds.Store(credstore_name, environment=env)
     try:
         data = store.get(registry)
         res = {

docker/client.py

@@ -33,6 +33,8 @@ class DockerClient(object):
             :py:class:`~docker.tls.TLSConfig` object to use custom
             configuration.
         user_agent (str): Set a custom user agent for requests to the server.
+        credstore_env (dict): Override environment variables when calling the
+            credential store process.
     """
     def __init__(self, *args, **kwargs):
         self.api = APIClient(*args, **kwargs)
@@ -66,6 +68,8 @@ class DockerClient(object):
             assert_hostname (bool): Verify the hostname of the server.
             environment (dict): The environment to read environment variables
                 from. Default: the value of ``os.environ``
+            credstore_env (dict): Override environment variables when calling
+                the credential store process.
 
         Example:
 
@@ -77,8 +81,9 @@ class DockerClient(object):
         """
         timeout = kwargs.pop('timeout', DEFAULT_TIMEOUT_SECONDS)
         version = kwargs.pop('version', None)
-        return cls(timeout=timeout, version=version,
-                   **kwargs_from_env(**kwargs))
+        return cls(
+            timeout=timeout, version=version, **kwargs_from_env(**kwargs)
+        )
 
     # Resources
     @property

requirements.txt

@@ -3,7 +3,7 @@ asn1crypto==0.22.0
 backports.ssl-match-hostname==3.5.0.1
 cffi==1.10.0
 cryptography==1.9
-docker-pycreds==0.2.3
+docker-pycreds==0.3.0
 enum34==1.1.6
 idna==2.5
 ipaddress==1.0.18

setup.py

@@ -13,7 +13,7 @@ requirements = [
     'requests >= 2.14.2, != 2.18.0',
     'six >= 1.4.0',
     'websocket-client >= 0.32.0',
-    'docker-pycreds >= 0.2.3'
+    'docker-pycreds >= 0.3.0'
 ]
 
 extras_require = {

tests/unit/api_test.py

@@ -44,7 +44,7 @@ def response(status_code=200, content='', headers=None, reason=None, elapsed=0,
     return res
 
 
-def fake_resolve_authconfig(authconfig, registry=None):
+def fake_resolve_authconfig(authconfig, registry=None, *args, **kwargs):
     return None