duplicity sftp backend should ignore removing a file which is not there

[Markus]

Using ubuntu lucid ppa: 0.6.13-0ubuntu1~lucid1 with sftp.

when duplicity tries to remove a file on a backend which isn't there, it is something that shouldn't happen in the first place. however for me, it always tries to delete the .manifest of an old partial backup which results in duplicity erroring out without starting a new full one.

below is a simple patch which detects if the failing command is a remove-command and ignores the errors when the file to be removed is already not present.

[Kenneth Loafman (kenneth-loafman)]

Thanks for the patch!

[Olivier - interfaSys (olivier-interfasys)]

This is still a problem with version 0.6.20.

The purge task will always fail because of duplicity trying to delete ghost files and the operation has to be repeated multiple times in a row until all old backups have finally been removed.