Add configuration show command

Create a `configuration show` command that displays the current
configuration of the CLI.  Different configurations can be
displayed using options such as --os-cloud.  Passwords and
tokens are redacted by default unless the --unmask
option is specified.

Closes-Bug: #1476729

Change-Id: I0792365d0c5fa526cd09c0ed88c6bb1e2cb813a7

openstackclient/common/clientmanager.py

@@ -15,6 +15,7 @@
 
 """Manage access to the clients, including authenticating when needed."""
 
+import copy
 import logging
 import pkg_resources
 import sys
@@ -203,6 +204,9 @@ class ClientManager(object):
                                               interface=interface)
         return endpoint
 
+    def get_configuration(self):
+        return copy.deepcopy(self._cli_options.config)
+
 
 # Plugin Support
 

openstackclient/tests/fakes.py

@@ -28,6 +28,7 @@ PASSWORD = "scratchy"
 PROJECT_NAME = "poochie"
 REGION_NAME = "richie"
 INTERFACE = "catchy"
+VERSION = "3"
 
 TEST_RESPONSE_DICT = fixture.V2Token(token_id=AUTH_TOKEN,
                                      user_name=USERNAME)
@@ -102,6 +103,17 @@ class FakeClientManager(object):
         self.auth_ref = None
         self.auth_plugin_name = None
 
+    def get_configuration(self):
+        return {
+            'auth': {
+                'username': USERNAME,
+                'password': PASSWORD,
+                'token': AUTH_TOKEN,
+            },
+            'region': REGION_NAME,
+            'identity_api_version': VERSION,
+        }
+
 
 class FakeModule(object):
     def __init__(self, name, version):

setup.cfg

@@ -44,6 +44,7 @@ openstack.cli.base =
     volume = openstackclient.volume.client
 
 openstack.common =
+    configuration_show = openstackclient.common.configuration:ShowConfiguration
     extension_list = openstackclient.common.extension:ListExtension
     limits_show = openstackclient.common.limits:ShowLimits
     quota_set = openstackclient.common.quota:SetQuota