GNU bug report logs - #26904
Wishlist: Tell grep to stop when a line matches something else.

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

From: LA-notifications <at> xecu.net
To: bug-grep <at> gnu.org
Subject: Wishlist: Tell grep to stop when a line matches something else.
Date: Sat, 13 May 2017 01:10:52 -0400

Hello.

I wish I could tell grep to stop searching in a file when it gets to a 
line matching something else. So if grep is searching a file for 'foo' 
then finds a line matching 'bar', stop searching for 'foo'. It would 
help me out a lot when searching for things in my perl modules where I 
do not want my perl pod searched.

LA

Message #8 received at 26904 <at> debbugs.gnu.org (full text, mbox):

From: Shlomi Fish <shlomif <at> shlomifish.org>
To: LA-notifications <at> xecu.net
Cc: 26904 <at> debbugs.gnu.org
Subject: Re: bug#26904: Wishlist: Tell grep to stop when a line matches
 something else.
Date: Sat, 13 May 2017 09:31:05 +0300

Hi LA,

On Sat, 13 May 2017 01:10:52 -0400
LA-notifications <at> xecu.net wrote:

> Hello.
> 
> I wish I could tell grep to stop searching in a file when it gets to a 
> line matching something else. So if grep is searching a file for 'foo' 
> then finds a line matching 'bar', stop searching for 'foo'. It would 
> help me out a lot when searching for things in my perl modules where I 
> do not want my perl pod searched.
> 

It may be out of the scope of GNU grep, but should be doable in perl -ln or sed.
E.g (untested):

perl -ln -E '/bar/?exit:/foo/?say:0'

Regards,

	Shlomi Fish

> LA
> 
> 
> 



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