def mkdir(self, relpath, mode=None):
# We hook into mkdir so that we can request the creation of a branch
# and so that we can provide useful errors in the special case where
# the user tries to make a directory like "~foo/bar". That is, a
# directory that has too little information to be translated into a
# Launchpad branch.
deferred = AsyncVirtualTransport._getUnderlyingTransportAndPath(
self, relpath)
@no_traceback_failures
def maybe_make_branch_in_db(failure):
# Looks like we are trying to make a branch.
failure.trap(NoSuchFile)
return self.server.createBranch(self._abspath(relpath))
@no_traceback_failures
def real_mkdir(result):
transport, path = result
return getattr(transport, 'mkdir')(path, mode)
deferred.addCallback(real_mkdir)
deferred.addErrback(maybe_make_branch_in_db)
return deferred
