Always forces full backup

[Michal Čihař]

I'm running daily incremental backups and monthly full ones. Since upgrade to 0.6.14 (it might also appear in 0.6.13, because I'm not sure if I did use that one), duplicity always does full backup:

Reading globbing filelist /etc/duplicity.list
Synchronizing remote metadata to local cache...
Deleting local /var/cache/duplicity/57cfdb6f20a4104d181d228fc19db339/duplicity-full-signatures.20110818T033800Z.sigtar.gz (not authoritative at backend).
Deleting local /var/cache/duplicity/57cfdb6f20a4104d181d228fc19db339/duplicity-full.20110818T033800Z.manifest (not authoritative at backend).
Last full backup date: none
No signatures found, switching to full backup.

The collection-status reports all previous full backups correctly and restore from them works also fine.

Files which did exist on backend by time the backup was run:

duplicity-full-signatures.20110819T044314Z.sigtar.gpg duplicity-full.20110819T044314Z.vol1.difftar.gpg
duplicity-full.20110819T044314Z.manifest.gpg

The problem seems to be in fact that it no longer handles path scp://<email address hidden>//volume1/backup/ as absolute on the backup server:

State = sftp, Before = 'Connected to backup.home.cihar.com.'
sftp command: 'mkdir ""'
State = sftp, Before = 'mkdir ""
Couldn't create directory: Failure'
sftp command: 'cd ""'
State = sftp, Before = 'cd ""'
sftp command: 'mkdir ""'
State = sftp, Before = 'mkdir ""
Couldn't create directory: Failure'
sftp command: 'cd ""'
State = sftp, Before = 'cd ""'
sftp command: 'mkdir "volume1"'
State = sftp, Before = 'mkdir "volume1"
Couldn't create directory: Failure'
sftp command: 'cd "volume1"'
State = sftp, Before = 'cd "volume1"'
sftp command: 'mkdir "backup"'
State = sftp, Before = 'mkdir "backup"
Couldn't create directory: Failure'
sftp command: 'cd "backup"'
State = sftp, Before = 'cd "backup"'
sftp command: 'mkdir ""'
State = sftp, Before = 'mkdir ""
Couldn't create directory: Failure'
sftp command: 'cd ""'
State = sftp, Before = 'cd ""'
sftp command: 'mkdir "jabber"'
State = sftp, Before = 'mkdir "jabber"
Couldn't create directory: Failure'
sftp command: 'cd "jabber"'
State = sftp, Before = 'cd "jabber"'
sftp command: 'ls -1'
State = sftp, Before = 'ls -1'
State = sftp, Before = 'quit'

[Petter Abrahamsson (petter)]

I've noticed the same issue (Fedora 15, duplicity 0.6.14). A workaround for me was to use rsync (over ssh) as protocol instead of scp, ie. duplicity --no-encryption --full-if-older-than 1W /my/local/dir rsync://uid@host//my/remote/dir.

/petter