Re: Hooks for moving an article and for setting it expirable

[Eric Abrahamsen <eric@ericabrahamsen.net>]

Christopher Culver <crculver@christopherculver.com> writes:

> Eric Abrahamsen <eric@ericabrahamsen.net> writes:
>> In gnus-sum.el there are a series of `gnus-data-*' functions for
>> working with the data vector, there's a `gnus-data-number', for
>> instance. Of course, all that does is take the car of the vector! But
>> if you're doing more than that, it's probably better to use the
>> pre-made functions.
>
> How does one use that? To save the article number as a variable specific
> to the function I’m writing, I had (defvar the-article-number (aref
> data-header 0)), which works. However, changing that to
> (gnus-data-number data-header) gives an error.

Huh, that's weird, I don't see why (aref ARRAY 0) would be any different
from (car ARRAY)... What error do you get?

> The problem now with my function is that gnus-article-move-hook is
> apparently called *after* the message has been totally moved from the
> group in question and deleted from the summary buffer. Without the
> article still present in the summary buffer, I cannot use the following
> functions that I had expected to:
>
> (gnus-summary-goto-subject the-article-number)  
> (gnus-summary-save-in-pipe "my-piped-command" t)
>
> Trying to use those functions results in the following error message:
>
> No such file: /home/crculver/Mail/mail/misc/54433
> No such article (may have expired or been canceled)
>
> Does Gnus have a way of accessing messages in other groups than what is
> visible in the summary buffer? Of course, the article number will change in
> the group to which the message is moved.
>
> Or is there a way to run the gnus-article-move-hook function *prior* to
> the moving of the message?

There are several dynamic variables bound during
`gnus-summary-move-article' that you might be able to use. In the
message moving loop, the variables to-group and to-article *ought* to be
bound to the destination group, and the message's new article number in
that group. Maybe try using those variables in your hook function to
find the article at its new location?

HTH,
Eric