lock_path(directory) fails if directory is empty

[Christian Schwede]

lock_path(directory) raises an exception if directory is empty. This happens for example if one is using swift-account-info against a database in the current working directory like this:

 swift-account-info c8bcccab3ddbfdc34b08e9223f4f5178.db

 Traceback (most recent call last):
  File "/usr/local/bin/swift-account-info", line 90, in <module>
    print_account_info(args[0], swift_dir=options.swift_dir)
  File "/usr/local/bin/swift-account-info", line 40, in print_account_info
    info = broker.get_info()
  File "/vagrant/swift/swift/account/backend.py", line 264, in get_info
    self._commit_puts_stale_ok()
  File "/vagrant/swift/swift/common/db.py", line 558, in _commit_puts_stale_ok
    self._commit_puts()
  File "/vagrant/swift/swift/common/db.py", line 529, in _commit_puts
    with lock_parent_directory(self.pending_file, self.pending_timeout):
  File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/vagrant/swift/swift/common/utils.py", line 1392, in lock_path
    mkdirs(directory)
  File "/vagrant/swift/swift/common/utils.py", line 572, in mkdirs
    os.makedirs(path)
  File "/usr/lib/python2.7/os.py", line 157, in makedirs
    mkdir(name, mode)
 OSError: [Errno 2] No such file or directory: ''

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/84411

[Edward (zhang-hare)]

Chris, I can't reproduce this bug on my environment.

[Christian Schwede (cschwede)]

Edward, thanks for looking into this! I just checked again using the latest master branch, and I don't see this bug anymore. I'll close this bug report.