Re: Expire by moving

[Hrvoje Niksic <hniksic@iskon.hr>]

Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> Hrvoje Niksic <hniksic@iskon.hr> writes:
> 
> > > So I thought that it would be nice if gnus had a feature to expire
> > > messages not by /deleting/ them, but by /moving/ them to some
> > > arbitrary group.
> > 
> > That would rule.  When we were in Japan, Lars agreed that it would be
> > totally cool, and said he'd implement it.
> > 
> > Laaaaaaaaaaaaaaaaaaaaaars!
> 
> Er, so I did.
> 
> So, how should this be specified?  Moved to which group, etc?

The existing `expire' stuff should remain untouched (types, periods,
etc.), all one should need to add is some sort of "target" of the
expiration.

The default expire-target target is simply `delete', while I can
imagine this addition would add a `move' target (`copy' wouldn't make
much sense).  For instance, you could use this as group parameters for
a "private" group where private mail lands:

((total-expire . t)
 (expiry-wait . 28)    ; keep a month old mails around
 (expiry-target . "nnfolder:really-old-private"))

The expiry-target parameter could also be a form that specifies the
group dynamically, so you can do the file-per-month trick described
under archive section.