GNU bug report logs - #46859
28.0.50; [PATCH]: Add option to truncate long lines in xref.el

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Message #38 received at 46859 <at> debbugs.gnu.org (full text, mbox):

From: Gregory Heytings <gregory <at> heytings.org>
To: Juri Linkov <juri <at> linkov.net>
Cc: 46859 <at> debbugs.gnu.org
Subject: Re: bug#46859: 28.0.50; [PATCH]: Add option to truncate long lines
 in xref.el
Date: Wed, 03 Mar 2021 09:52:38 +0000

>>> But maybe your new option would be easier to customize.
>>
>> Yeah, maybe.  However, without benchmarking, it is quite clear that 
>> adding your option is faster than my patch, since ripgrep has to search 
>> the whole minified file.  I assume it short circuits, so that results 
>> are delivered quicker to emacs.  Maybe this bug can be closed.
>
> Your new option is still necessary for the default case when 
> 'xref-search-program' is 'grep' since GNU grep has no option to truncate 
> output, so xref should do post-processing for grep.
>

Actually, it is possible to truncate output with GNU grep:

grep -oE '.{0,100}PATTERN.{0,100}'

prints at most 100 characters before and after PATTERN.  I find this much 
better than ripgrep -M.

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