From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Felipe Contreras" <felipe.contreras@gmail.com>
Subject: Re: [TOY PATCH] filter-branch: add option --delete-unchanged
Date: Sun, 14 Sep 2008 19:29:59 +0300
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Cc: git@vger.kernel.org, "Jan Wielemaker" <J.Wielemaker@uva.nl>
To: "Thomas Rast" <trast@student.ethz.ch>
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On Fri, Aug 8, 2008 at 11:10 PM, Thomas Rast <trast@student.ethz.ch> wrote:
> With --delete-unchanged, we nuke refs whose targets did not change
> during rewriting.  It is intended to be used along with
> --subdirectory-filter to clean out old refs from before the first
> commit to the filtered subdirectory.  (They would otherwise keep the
> old history alive.)
>
> Obviously this is a rather dangerous mode of operation.
>
> Note the "sort -u" is required: Without it, --all includes
> 'origin/master' twice (from 'origin/master' and via 'origin/HEAD'),
> and the second pass concludes it is unchanged and nukes the ref.

This is really useful, why isn't it merged?

Personally I use filter-branch to, duh, filter a branch, so I don't
want the commit objects that are not filtered, nor the refs to them.

-- 
Felipe Contreras