[Duplicity-talk] addonly mode?

[Avery Andrews]

I use a backup regime (based on svn) whereby, if things are working correctly, files should only be added, never changed, when duplicity plays its role.  So it would be excellent for if there were an --addonly switch that would halt the script if it thought it had to change rather than add any files when sending to the backup server.  Is there such a thing that I've somehow missed?  Writing a script to do a dry run first and checking for changes would work, but seems a bit clumsy.

 - Avery