Re: gnus uses a cache? And how it affects mairix searches...

[Dan Christensen <jdc@uwo.ca>]

Eric Abrahamsen <eric@ericabrahamsen.net> writes:

> Dan Christensen <jdc@uwo.ca> writes:
>
>> I finally figured this out.  Setting gnus-keep-backlog to nil solved
>> the problem.  It turns out that by default, gnus caches the most recent
>> 20 articles you have viewed, rather than contacting the server again.
>> This is true even if you exit and reenter a summary buffer.
>>
>> Maybe nnmairix should remove articles from this cache when it creates
>> a search folder?  Or bind this variable to nil in nnmairix groups?
>>
>> Dan
>
> Can you or someone else using nnmairix tell me if calling
> (gnus-virtual-group-p "nnmairix:your group name") returns t? It's true
> for nnvirtual and nnir groups, so that function might make a good guard
> inside `gnus-backlog-enter-article'.
>
> Eric

Unfortunately, that doesn't work:

(gnus-virtual-group-p "nnmairix+mairixserver:nnmairixsearch")
nil

So maybe a combination of checks is needed.  Or just check if the
backend is in a banned list which includes nnmairix, nnir, etc.
This is what the registry does in gnus.el:

;; The Gnus registry's ignored groups
(gnus-define-group-parameter
 registry-ignore
 :type list
 :function-document
 "Whether this group should be ignored by the registry."
 :variable gnus-registry-ignored-groups
 :variable-default (mapcar
                    (lambda (g) (list g t))
                    '("delayed$" "drafts$" "queue$" "INBOX$"
                      "^nnmairix:" "^nnir:" "archive"))
...

Or maybe gnus-virtual-group-p should be changed to declare that nnmairix
groups are virtual?  This could be accomplished by changing
gnus-valid-select-methods.  In gnus.el, it doesn't list nnmairix at all,
but somehow when using nnmairix, an entry for nnmairix gets added to
this list, without the virtual keyword (see below).

I don't know enough about the internals to know the best way to
proceed.

Dan


gnus-valid-select-methods is a variable defined in `gnus.el'.

Value: (("nntp" post address prompt-address physical-address cloud)
 ("nnspool" post address)
 ("nnvirtual" post-mail virtual prompt-address)
 ("nnmbox" mail respool address)
 ("nnml" post-mail respool address)
 ("nnmh" mail respool address)
 ("nndir" post-mail prompt-address physical-address)
 ("nneething" none address prompt-address physical-address)
 ("nndoc" none address prompt-address)
 ("nnbabyl" mail address respool)
 ("nndraft" post-mail)
 ("nnfolder" mail respool address)
 ("nngateway" post-mail address prompt-address physical-address)
 ("nnweb" none)
 ("nnrss" none global)
 ("nnagent" post-mail)
 ("nnimap" post-mail address prompt-address physical-address respool server-marks cloud)
 ("nnmaildir" mail respool address server-marks)
 ("nnnil" none)
 ("nnmairix" mail address)
 ("nnir" mail virtual))