From: Istvan Marko <notmuch@kismala.com>
To: notmuch@notmuchmail.org
Subject: Re: Reply all - issue
References: <000001cdfcd9$82500f00$86f02d00$@nl>
	<CA+pa1O0mTxkj_FMQH_jXWajmUAKHWbMsB4Yhp_4UX7hnhwgBrg@mail.gmail.com>
	<000001ce0161$5da40990$18ec1cb0$@nl>
	<CA+pa1O3zdpz+43eJpsJwakV72_Fr5U4Dvk1ta1su7M701bx9mw@mail.gmail.com>
Date: Wed, 06 Feb 2013 10:19:50 -0800
In-Reply-To:
 <CA+pa1O3zdpz+43eJpsJwakV72_Fr5U4Dvk1ta1su7M701bx9mw@mail.gmail.com>
	(=?utf-8?Q?=22Micha=C5=82?= Nazarewicz"'s message of "Mon, 4 Feb 2013
	11:39:44 +0100")
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Micha=C5=82 Nazarewicz <mina86-deATy8a+UHjQT0dZR+AlfA@public.gmane.org>
writes:

> I was actually wondering that instead of hard coding the logic into notmu=
ch
> itself, maybe it would be better to provide some sort of "split-thread" a=
nd
> "join-threads" which could than be used by separate tagging tool.

Such a customized threading feature would be great, I would use it to
tie together "loose threads" originating from crappy ticket tracking
tools that don't insert any In-Reply-To or References headers. Currently
I handle this by inserting fake In-Reply-To headers during delivery and
I would love to have a cleaner way.

To make this useful it would have to be persistent across dumps and
restores.=20

If we only consider splitting then a relatively easy way might be to
allow the user to configure some tags to mark a split. In
.notmuch-config you'd have:

split_tags: split

And then you'd tag +split the message to mark the start of a new
thread. The threading code would watch for such tags. Which might get
hairy if the tag information is not already at hand during threading.

I don't see how this would work for joins so it would not help me but it
could address the original problem.

--=20
	Istvan