GNU bug report logs - #34930
diff enhancement request

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From: Tim Waugh <twaugh <at> redhat.com>
To: Michael Aramini <m.aramini <at> verizon.net>
Cc: 34930 <at> debbugs.gnu.org
Subject: bug#34930: [bug-diffutils] bug#34930: diff enhancement request
Date: Thu, 21 Mar 2019 09:28:58 +0000

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On Wed, 20 Mar 2019 at 23:12, Michael Aramini <m.aramini <at> verizon.net> wrote:

> I wish to request an enhancement to diff which would add a command line
> option which takes a regular expression and suppresses differences none of
> whose lines match the regular expression.  Multiple instances of this
> option can be used to specify multiple regular expressions, which cases
> differences will be suppressed if none of the lines of the difference match
> any of the regular expressions.  (Such a feature would be more or less the
> complement of the existing --ignore-matching-lines=*regexp* (-I *regexp*)
> command line option to diff.)
>
> Please let me know if there already is way to accomplish this using
> existing options to GNU diff and/or by the use of other GNU Diffutils.
>

The grepdiff tool (from patchutils) might be able to do what you want,
perhaps in conjunction with other tools:
http://cyberelk.net/tim/software/patchutils/

Tim.
*/

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