From mboxrd@z Thu Jan  1 00:00:00 1970
From: Johannes Sixt <J.Sixt@eudaptics.com>
Subject: Re: [PATCH] Add git-filter-branch
Date: Wed, 06 Jun 2007 17:22:43 +0200
Organization: eudaptics software gmbh
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Cc: git@vger.kernel.org
To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
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Johannes Schindelin wrote:
> Of course, it would be even more so if the target branch name was
> "filtered", overrideable by "--target <name>".

My plan for this is:

1. run the rev-list args ("$@") through rev-parse
2. pick only the positive ones (/^[a-z0-9]{40}$/)
3. filter show-ref against the result of 2.
4. foreach ref in the result of 3. install a refs/rewritten/$ref
   with the mapped id if and only if the mapped id is different
   from the original id of $ref.

Then you can, for example, 'git filter-branch --all' to rewrite all
branches.

-- Hannes