Add ability to prompt for passwords for user create and set

* Add get_password method to the utilities
* Add --password-prompt option
* Call the get_password method if a prompt is requested
* Various tests

Change-Id: I1786ad531e2a2fbcc21b8bc86aac0ccd7985995a
Closes-Bug: 1100116

1 files changed, 16 insertions, 0 deletions

diff --git a/openstackclient/common/utils.py b/openstackclient/common/utils.py
index 94ea2225..7cd877ef 100644
--- a/openstackclient/common/utils.py
+++ b/openstackclient/common/utils.py
@@ -15,6 +15,7 @@
 
 """Common client utilities"""
 
+import getpass
 import logging
 import os
 import six
@@ -229,3 +230,18 @@ def get_effective_log_level():
     for handler in root_log.handlers:
         min_log_lvl = min(min_log_lvl, handler.level)
     return min_log_lvl
+
+
+def get_password(stdin):
+    if hasattr(stdin, 'isatty') and stdin.isatty():
+        try:
+            while True:
+                first_pass = getpass.getpass("User password: ")
+                second_pass = getpass.getpass("Repeat user password: ")
+                if first_pass == second_pass:
+                    return first_pass
+                print("The passwords entered were not the same")
+        except EOFError:  # Ctl-D
+            raise exceptions.CommandError("Error reading password.")
+    raise exceptions.CommandError("There was a request to be prompted for a"
+                                  " password and a terminal was not detected.")