Re: Threading without References header?

[Kai Grossjohann <grossjohann@charly.cs.uni-dortmund.de>]

>>>>> Lars Magne Ingebrigtsen writes:

  Lars> If there is no References line, then (by definition) there is
  Lars> no parent.

I'd like Gnus to perform magic :)  When generating a summary buffer
Gnus is smart enough to sort together articles with the same subject
but no reference thingy, assuming they're somehow related.  I like
that a lot.

However, by default this happens only if the two articles are both in
the summary buffer anyway.  WIBNI Gnus would do this even if it would
normally not present the article to me?

Here's the situation.

  - Nice: I write a mail.  I tick my own Gcc'd copy.  Somebody replies
    to the mail, but without references stuff.  I enter the group with
    the new article.  Gnus sorts my mail together with the reply,
    based on the fact that they have similar Subject lines (I guess).

  - Not nice: Same as above, but I mark my own copy as read.  Rest is
    same as above, but Gnus doesn't display my own copy in the summary
    at all when I enter the group with the reply in it.

I'd like Gnus to behave similar to the first case even in the second.
This ought to be possible by fetching old headers and searching them,
just like Gnus searches the ticked messages for one to sort together
with the reply.  You see, the `nice' case allows me to hit "T ^" for
the reply which will give me nice threading in the future.  But in the
`not nice' case I first have to hit "4 2 M-g" (say) to be able to do
that.

Of course, the best thing of all would be if Gnus would generate a
correct References header on its own, by reading the mail and seeing
which one it replies to!

Seriously, if there is a new mail, you can just strip the Re and make
it a child of the root of the thread you find with the subject.

I hope I explained my wish well enough to understand it.  Do you think
this would be nice to have?  Would it be difficult to do?  (Seems like
Gnus has got the old headers around anyway if I have set
gnus-fetch-old-headers to t so I like to think it wouldn't be too
difficult.)

kai
-- 
Life is hard and then you die.