Add permission plugin to client

This plugin implements subcommands for listing current login user
permissions.

JIRA: PDC-1018

pdc_client/plugins.py

@@ -100,6 +100,14 @@ def worker():
     return itertools.chain.from_iterable(worker())
 
 
+def get_permissions(res, **kwargs):
+    """
+    This call returns current login user's permissions.
+    """
+    response = res(**kwargs)
+    return response.get('permissions', None)
+
+
 def add_parser_arguments(parser, args, group=None, prefix=DATA_PREFIX):
     """
     Helper method that populates parser arguments. The argument values can

pdc_client/plugins/permission.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2015 Red Hat
+# Licensed under The MIT License (MIT)
+# http://opensource.org/licenses/MIT
+#
+import json
+
+from pdc_client.plugins import PDCClientPlugin, get_permissions
+
+
+class PermissionPlugin(PDCClientPlugin):
+    def register(self):
+        subcmd = self.add_command('list-my-permissions', help='list my permissions')
+        subcmd.set_defaults(func=self.permission_list)
+
+    def permission_list(self, args):
+        permissions = get_permissions(self.client.auth['current-user'])
+        if args.json:
+            print json.dumps(list(permissions))
+            return
+
+        for permission in sorted(permissions):
+            print permission
+
+
+PLUGIN_CLASSES = [PermissionPlugin]