NameError sometimes in Ubuntu One replication

In 0.6.9b, it is possible for replication_services.ubuntuone.PrefixGetter to get in a state where it will not replicate. On first run of the __str__ method, self.oauth_header is None, so we get oauth data and create a local "consumer" variable.

Then, we use that consumer variable to construct an oauth header.

We then try to get the "couchdb_root" from U1 API. IF that succeeds, then we save the result and on future runs we give that out. If that fails, we start over at the previous step, using a nonexistent consumer variable to construct an oauth header.

Using a nonexistent variable causes UnboundLocalError.

DEBUG:replication:Looking up prefix for service 'ubuntuone'
DEBUG:replication:Looking up prefix for service 'ubuntuone'
ERROR:replication:replication of services aborted
Traceback (most recent call last):
  File "/home/cmiller/work/canonical/desktopcouch/trunk/desktopcouch/replication.py", line 145, in do_all_replication
    remote_location = str(prefix_getter)
  File "/home/cmiller/work/canonical/desktopcouch/trunk/desktopcouch/replication_services/ubuntuone.py", line 88, in __str__
    consumer, access_token, url)
UnboundLocalError: local variable 'consumer' referenced before assignment
replication 2010-10-05 12:57:08,681 - replication of services aborted