Add create-stream management command.

The current version should only be used for testing; for example,
if you want to create a bunch of streams for stress testing, you
can run this in a loop.

(imported from commit ec51a431fb9679fc18379e4c6ecdba66bc75a395)

zerver/management/commands/create-stream.py

@@ -0,0 +1,32 @@
+from __future__ import absolute_import
+
+from django.core.management.base import BaseCommand
+
+from zerver.lib.actions import do_create_stream
+from zerver.models import Realm, get_realm
+
+import sys
+
+class Command(BaseCommand):
+    help = """Create a stream, and subscribe all active users (excluding bots).
+
+This should be used for TESTING only, unless you understand the limitations of
+the command.
+
+Usage: python manage.py create-stream <domain> <stream name>"""
+
+    def handle(self, *args, **options):
+        if len(args) != 2:
+            print "Please provide a domain and the stream name."
+            exit(1)
+
+        domain, stream_name = args
+        encoding = sys.getfilesystemencoding()
+
+        try:
+            realm = get_realm(domain)
+        except Realm.DoesNotExist:
+            print "Unknown domain %s" % (domain,)
+            exit(1)
+
+        do_create_stream(realm, stream_name.decode(encoding))