Fix parsing of context file paths

Signed-off-by: Anca Iordache <anca.iordache@docker.com>

docker/context/api.py

@@ -2,7 +2,7 @@
 import os
 
 from docker import errors
-from docker.context.config import METADATA_DIR
+from docker.context.config import get_meta_dir
 from docker.context.config import METAFILE
 from docker.context.config import get_current_context_name
 from docker.context.config import write_context_name_to_docker_config
@@ -93,7 +93,7 @@ def get_context(cls, name=None):
         if not name:
             name = get_current_context_name()
         if name == "default":
-            return ContextAPI.DEFAULT_CONTEXT
+            return cls.DEFAULT_CONTEXT
         return Context.load_context(name)
 
     @classmethod
@@ -106,7 +106,7 @@ def contexts(cls):
                 If the server returns an error.
         """
         names = []
-        for dirname, dirnames, fnames in os.walk(METADATA_DIR):
+        for dirname, dirnames, fnames in os.walk(get_meta_dir()):
             for filename in fnames + dirnames:
                 if filename == METAFILE:
                     try:
@@ -118,7 +118,7 @@ def contexts(cls):
                             "Failed to load metafile {}: {}".format(
                                 filename, e))
 
-        contexts = [ContextAPI.DEFAULT_CONTEXT]
+        contexts = [cls.DEFAULT_CONTEXT]
         for name in names:
             contexts.append(Context.load_context(name))
         return contexts
@@ -129,11 +129,11 @@ def get_current_context(cls):
         Returns:
             (Context): current context object.
         """
-        return ContextAPI.get_context()
+        return cls.get_context()
 
     @classmethod
     def set_current_context(cls, name="default"):
-        ctx = ContextAPI.get_context(name)
+        ctx = cls.get_context(name)
         if not ctx:
             raise errors.ContextNotFound(name)
 
@@ -197,7 +197,7 @@ def inspect_context(cls, name="default"):
         if not name:
             raise errors.MissingContextParameter("name")
         if name == "default":
-            return ContextAPI.DEFAULT_CONTEXT()
+            return cls.DEFAULT_CONTEXT()
         ctx = Context.load_context(name)
         if not ctx:
             raise errors.ContextNotFound(name)

docker/context/config.py

@@ -7,10 +7,6 @@
 from docker.constants import DEFAULT_UNIX_SOCKET
 from docker.utils.config import find_config_file
 
-CONTEXTS_DIR = os.path.join(os.path.dirname(
-    find_config_file() or ""), "contexts")
-METADATA_DIR = os.path.join(CONTEXTS_DIR, "meta")
-TLS_DIR = os.path.join(CONTEXTS_DIR, "tls")
 METAFILE = "meta.json"
 
 
@@ -20,7 +16,7 @@ def get_current_context_name():
     if docker_cfg_path:
         try:
             cfg = open(docker_cfg_path, "r")
-            name = json.load(cfg).get("currentContext")
+            name = json.load(cfg).get("currentContext", "default")
         except Exception:
             return "default"
     return name
@@ -53,16 +49,26 @@ def get_context_id(name):
     return hashlib.sha256(name.encode('utf-8')).hexdigest()
 
 
-def get_meta_dir(name):
-    return os.path.join(METADATA_DIR, get_context_id(name))
+def get_context_dir():
+    return os.path.join(os.path.dirname(find_config_file() or ""), "contexts")
+
+
+def get_meta_dir(name=None):
+    meta_dir = os.path.join(get_context_dir(), "meta")
+    if name:
+        return os.path.join(meta_dir, get_context_id(name))
+    return meta_dir
 
 
 def get_meta_file(name):
     return os.path.join(get_meta_dir(name), METAFILE)
 
 
-def get_tls_dir(name, endpoint=""):
-    return os.path.join(TLS_DIR, get_context_id(name), endpoint)
+def get_tls_dir(name=None, endpoint=""):
+    context_dir = get_context_dir()
+    if name:
+        return os.path.join(context_dir, "tls", get_context_id(name), endpoint)
+    return os.path.join(context_dir, "tls")
 
 
 def get_context_host(path=None):