GNU bug report logs - #34930
diff enhancement request

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Michael Aramini <m.aramini <at> verizon.net>
To: bug-diffutils <at> gnu.org
Subject: diff enhancement request
Date: Wed, 20 Mar 2019 21:29:19 +0000 (UTC)

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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.

-Michael Aramini

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Message #8 received at 34930 <at> debbugs.gnu.org (full text, mbox):

From: Tim Waugh <twaugh <at> redhat.com>
To: Michael Aramini <m.aramini <at> verizon.net>
Cc: 34930 <at> debbugs.gnu.org
Subject: Re: [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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