support '-' to indicate stdout in nova-manage project 'environment' and 'zip'

This just adds support to do:
  nova-manage project zip test-project admin - > out.zip
  nova-manage project environment test-project admin - | grep NOVA_URL

1 files changed, 10 insertions, 4 deletions

diff --git a/bin/nova-manage b/bin/nova-manage
index 7dfe91698..b5247f8c3 100755
--- a/bin/nova-manage
+++ b/bin/nova-manage
@@ -414,8 +414,11 @@ class ProjectCommands(object):
         except (exception.UserNotFound, exception.ProjectNotFound) as ex:
             print ex
             raise
-        with open(filename, 'w') as f:
-            f.write(rc)
+        if filename == "-":
+            f = sys.stdout
+        else:
+            f = open(filename, 'w')
+        f.write(rc)
 
     def list(self, username=None):
         """Lists all projects
@@ -465,8 +468,11 @@ class ProjectCommands(object):
         arguments: project_id user_id [filename='nova.zip]"""
         try:
             zip_file = self.manager.get_credentials(user_id, project_id)
-            with open(filename, 'w') as f:
-                f.write(zip_file)
+            if filename == "-":
+                f = sys.stdout
+            else:
+                f = open(filename, 'w')
+            f.write(zip_file)
         except (exception.UserNotFound, exception.ProjectNotFound) as ex:
             print ex
             raise