Canonical way to find messages by message-id

Canonical way to find messages by message-id

[Sacha Chua]

Hello, everyone!

What is the canonical way to find a message by message ID? I maintain
planner.el, and right now we're doing it with this code snippet:

(defun planner-gnus-browse-url (url)
  "If this is a Gnus URL, jump to it."
  (when (string-match "^gnus://\\(.+\\)/\\(.+\\)" url)
    (let ((group (match-string 1 url))
          (article (match-string 2 url)))
      (gnus-fetch-group group 1)
      (or (gnus-summary-goto-article article nil t)
          (when (fboundp 'gnus-summary-insert-cached-articles)
            (gnus-summary-insert-cached-articles)
            (gnus-summary-goto-article article nil t))
          (message "Message could not be found."))
      t)))

where an example URL would be

gnus://mail.planner/<20040813162910.GA3241@khazad-dum>

Unfortunately, (gnus-fetch-group group 1) fails when the most recent
message is no longer in the group, and we occasionally have problems
with cached articles.

(gnus-fetch-group group) sorta works if we remember to specify a large
enough number of messages, but the prompt can be slightly annoying.
Loading all messages and waiting for the summary to display takes a
lot of time.

Is there a way to quickly jump to a specific message given the message
ID, and then display the article and the summary buffer with just that
message in it? I tried tracing through some functions in the summary
and article code, but got pretty lost. <sheepish grin>

Thanks for your help!

-- 
Sacha Chua <sacha@free.net.ph> - open source geekette
interests: emacs, gnu/linux, making computer science education fun
wearable computing, personal information management
http://sacha.free.net.ph/ - PGP Key ID: 0xE7FDF77C

Re: Canonical way to find messages by message-id

[Ted Zlatanov]

On Sun, 15 Aug 2004, sacha@free.net.ph wrote:

> Is there a way to quickly jump to a specific message given the message
> ID, and then display the article and the summary buffer with just that
> message in it? I tried tracing through some functions in the summary
> and article code, but got pretty lost. <sheepish grin>

If the gnus-registry is enabled, this is easy (in fact, this is the
registry's main purpose).  So you may want to check if the registry is
loaded and then use the slower method you showed as a fallback.

Ted