Adds tty password entry for cinderclient

Added functionality from keystoneclient to fallback to the tty for password
entry if no password is given via the environment or the --os-password option.

Change-Id: If5b27cb8c67712860faa24d543ed48eaa542f28b
Closes-Bug: 1357559

cinderclient/shell.py

@@ -21,6 +21,7 @@ Command-line interface to the OpenStack Cinder API.
 from __future__ import print_function
 
 import argparse
+import getpass
 import glob
 import imp
 import itertools
@@ -504,7 +505,6 @@ class OpenStackCinderShell(object):
         ks_logger.setLevel(logging.DEBUG)
 
     def main(self, argv):
-
         # Parse args once to find version and debug settings
         parser = self.get_base_parser()
         (options, args) = parser.parse_known_args(argv)
@@ -554,7 +554,6 @@ class OpenStackCinderShell(object):
              args.service_type, args.service_name,
              args.volume_service_name, args.os_cacert,
              args.os_auth_system)
-
         if os_auth_system and os_auth_system != "keystone":
             auth_plugin = cinderclient.auth_plugin.load_plugin(os_auth_system)
         else:
@@ -581,9 +580,20 @@ class OpenStackCinderShell(object):
                                            "env[OS_USERNAME].")
 
             if not os_password:
-                raise exc.CommandError("You must provide a password "
+                # No password, If we've got a tty, try prompting for it
-                                       "through --os-password or "
+                if hasattr(sys.stdin, 'isatty') and sys.stdin.isatty():
-                                       "env[OS_PASSWORD].")
+                    # Check for Ctl-D
+                    try:
+                        os_password = getpass.getpass('OS Password: ')
+                    except EOFError:
+                        pass
+                # No password because we didn't have a tty or the
+                # user Ctl-D when prompted.
+                if not os_password:
+                    raise exc.CommandError("You must provide a password "
+                                           "through --os-password, "
+                                           "env[OS_PASSWORD] "
+                                           "or, prompted response.")
 
             if not (os_tenant_name or os_tenant_id):
                 raise exc.CommandError("You must provide a tenant ID "

cinderclient/tests/test_shell.py

@@ -16,6 +16,7 @@ import re
 import sys
 
 import fixtures
+import mock
 import requests_mock
 from six import moves
 from testtools import matchers
@@ -24,6 +25,7 @@ from cinderclient import exceptions
 from cinderclient import shell
 from cinderclient.tests import utils
 from cinderclient.tests.fixture_data import keystone_client
+import keystoneclient.exceptions as ks_exc
 from keystoneclient.exceptions import DiscoveryFailure
 
 
@@ -33,10 +35,14 @@ class ShellTest(utils.TestCase):
         'OS_USERNAME': 'username',
         'OS_PASSWORD': 'password',
         'OS_TENANT_NAME': 'tenant_name',
-        'OS_AUTH_URL': 'http://no.where',
+        'OS_AUTH_URL': 'http://no.where/v2.0',
     }
 
     # Patch os.environ to avoid required auth info.
+    def make_env(self, exclude=None):
+        env = dict((k, v) for k, v in self.FAKE_ENV.items() if k != exclude)
+        self.useFixture(fixtures.MonkeyPatch('os.environ', env))
+
     def setUp(self):
         super(ShellTest, self).setUp()
         for var in self.FAKE_ENV:
@@ -110,6 +116,15 @@ class ShellTest(utils.TestCase):
         self.assertEqual(v3_url, os_auth_url, "Expected v3 url")
         self.assertEqual(v2_url, None, "Expected no v2 url")
 
+    @mock.patch('sys.stdin', side_effect=mock.MagicMock)
+    @mock.patch('getpass.getpass', return_value='password')
+    def test_password_prompted(self, mock_getpass, mock_stdin):
+        self.make_env(exclude='OS_PASSWORD')
+        # We should get a Connection Refused because there is no keystone.
+        self.assertRaises(ks_exc.ConnectionRefused, self.shell, 'list')
+        # Make sure we are actually prompted.
+        mock_getpass.assert_called_with('OS Password: ')
+
 
 class CinderClientArgumentParserTest(utils.TestCase):