The patch does not do what you want:

>>> re.sub('^/.+', '', '/')
'/'
>>> re.sub('^/.+', '', '/foo')
''


On Thu, Jan 22, 2015 at 5:14 PM, Adam Reichold <email address hidden>
wrote:

> Public bug reported:
>
> I use Duplicity 0.7.01 running on Python 2.7.9 on a current Arch Linux.
> My target file system is an FTP server which I access using the LFTP
> backend. When accessing my backup target using an URL like
> "ftp://<email address hidden>/", the LFTP backend immediately crashes with the
> following error:
>
> LFTP version is 4.6.1
> Benutze temporäres Verzeichnis /tmp/duplicity-XNJ6L_-tempdir
> Traceback (most recent call last):
>   File "/usr/bin/duplicity", line 1500, in <module>
>     with_tempdir(main)
>   File "/usr/bin/duplicity", line 1494, in with_tempdir
>     fn()
>   File "/usr/bin/duplicity", line 1327, in main
>     action = commandline.ProcessCommandLine(sys.argv[1:])
>   File "/usr/lib/python2.7/site-packages/duplicity/commandline.py", line
> 1047, in ProcessCommandLine
>     globals.backend = backend.get_backend(args[0])
>   File "/usr/lib/python2.7/site-packages/duplicity/backend.py", line 221,
> in get_backend
>     obj = get_backend_object(url_string)
>   File "/usr/lib/python2.7/site-packages/duplicity/backend.py", line 207,
> in get_backend_object
>     return factory(pu)
>   File
> "/usr/lib/python2.7/site-packages/duplicity/backends/lftpbackend.py", line
> 73, in __init__
>     if self.remote_path[-1] != '/':
> IndexError: string index out of range
>
> due to "self.remote_path" being empty. The attached patch seems to
> resolve the issue.
>
> ** Affects: duplicity
>      Importance: Undecided
>          Status: New
>
> ** Patch added: "Patch to only remove leading slash if it is not also
> trailing"
>
> https://bugs.launchpad.net/bugs/1413792/+attachment/4303869/+files/empty-remote-path.diff
>
> --
> You received this bug notification because you are subscribed to
> Duplicity.
> https://bugs.launchpad.net/bugs/1413792
>
> Title:
>   LFTP backend crashes on empty remote path
>
> Status in Duplicity - Bandwidth Efficient Encrypted Backup:
>   New
>
> Bug description:
>   I use Duplicity 0.7.01 running on Python 2.7.9 on a current Arch
>   Linux. My target file system is an FTP server which I access using the
>   LFTP backend. When accessing my backup target using an URL like
>   "ftp://<email address hidden>/", the LFTP backend immediately crashes with
>   the following error:
>
>   LFTP version is 4.6.1
>   Benutze temporäres Verzeichnis /tmp/duplicity-XNJ6L_-tempdir
>   Traceback (most recent call last):
>     File "/usr/bin/duplicity", line 1500, in <module>
>       with_tempdir(main)
>     File "/usr/bin/duplicity", line 1494, in with_tempdir
>       fn()
>     File "/usr/bin/duplicity", line 1327, in main
>       action = commandline.ProcessCommandLine(sys.argv[1:])
>     File "/usr/lib/python2.7/site-packages/duplicity/commandline.py", line
> 1047, in ProcessCommandLine
>       globals.backend = backend.get_backend(args[0])
>     File "/usr/lib/python2.7/site-packages/duplicity/backend.py", line
> 221, in get_backend
>       obj = get_backend_object(url_string)
>     File "/usr/lib/python2.7/site-packages/duplicity/backend.py", line
> 207, in get_backend_object
>       return factory(pu)
>     File
> "/usr/lib/python2.7/site-packages/duplicity/backends/lftpbackend.py", line
> 73, in __init__
>       if self.remote_path[-1] != '/':
>   IndexError: string index out of range
>
>   due to "self.remote_path" being empty. The attached patch seems to
>   resolve the issue.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/duplicity/+bug/1413792/+subscriptions
>