From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH v3] filter-branch.sh: support nearly proper tag name
 filtering
Date: Wed, 26 Mar 2008 00:57:08 -0700
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Cc: Johannes Schindelin <Johannes.Schindelin@gmx.de>,
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To: Brandon Casey <casey@nrlssc.navy.mil>
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Brandon Casey <casey@nrlssc.navy.mil> writes:

> If you think the strict ordering that mktag requires could be relaxed in the
> future, then the line number addresses in sed could be changed to ranges
> like:
>
> 	-e "1,4s/^object ..*/object $newobject/"
>
> Of course, if we use ranges, we may have to worry about matching against
> the tag body if the header gets any longer.

I do not think you have to worry if you did this:

        1,/^$/{
                s/object .*/object $newobject/
                s/type .*/type $newtype/
                ...
        }