add support to write to stdout rather than file if '-' is specified.

see bug 810157

Authors

@@ -85,6 +85,7 @@ Ryan Lucio <rlucio@internap.com>
 Salvatore Orlando <salvatore.orlando@eu.citrix.com>
 Sandy Walsh <sandy.walsh@rackspace.com>
 Sateesh Chodapuneedi <sateesh.chodapuneedi@citrix.com>
+Scott Moser <smoser@ubuntu.com>
 Soren Hansen <soren.hansen@rackspace.com>
 Thierry Carrez <thierry@openstack.org>
 Todd Willey <todd@ansolabs.com>

bin/nova-manage

@@ -414,6 +414,9 @@ class ProjectCommands(object):
         except (exception.UserNotFound, exception.ProjectNotFound) as ex:
             print ex
             raise
+        if filename == "-":
+            sys.stdout.write(rc)
+        else:
             with open(filename, 'w') as f:
                 f.write(rc)
 
@@ -465,6 +468,9 @@ class ProjectCommands(object):
         arguments: project_id user_id [filename='nova.zip]"""
         try:
             zip_file = self.manager.get_credentials(user_id, project_id)
+            if filename == "-":
+                sys.stdout.write(zip_file)
+            else:
                 with open(filename, 'w') as f:
                     f.write(zip_file)
         except (exception.UserNotFound, exception.ProjectNotFound) as ex: