jmcbray@carcosa.net (Jason F. McBrayer) writes:

> Bastien <bzg@altern.org> writes:
>
>> Anyway, i think gnus-registry comes in handy here.
>
> It looks like that may indeed be the way forward, if it will let you
> follow a link by message-id rather than group.  I'm not clear on the
> specifics of how you'd set it up, though.

Not fully tested yet, but this patch is a first attempt to implement
this.

It uses message-id instead of message number to store Gnus links. If
gnus-registry is on, it fetches location of the article depending on
gnus-registry-alist.  It's compatible with old Gnus links.

The problem is gnus-registry-alist can be huge, and access to article
might be somewhat slow.