GNU bug report logs - #64140
29.0.91; C-u M-x grep doesn't work correctly after M-x vc-git-grep

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Sean Whitton <spwhitton <at> spwhitton.name>
Cc: 64140 <at> debbugs.gnu.org, mardani29 <at> yahoo.es
Subject: bug#64140: 29.0.91; C-u M-x grep doesn't work correctly after M-x vc-git-grep
Date: Sat, 15 Mar 2025 12:49:32 +0200

> From: Sean Whitton <spwhitton <at> spwhitton.name>
> Cc: 64140 <at> debbugs.gnu.org,  mardani29 <at> yahoo.es
> Date: Sat, 15 Mar 2025 15:32:22 +0800
> 
> Hello,
> 
> On Fri 14 Mar 2025 at 10:42am +02, Eli Zaretskii wrote:
> 
> > That could be okay, but is not the most useful way of using Grep
> > history in git grep commands.  A more useful way would be to allow the
> > user to reuse Grep history in git grep commands by modifying them to
> > become valid command lines.  Because I think it would be extremely
> > useful to be able to run a "git grep" command that searches for the
> > same pattern as a previous Grep command, and vice versa.
> 
> Yes, you're right, that would be very useful.
> 
> I guess that we should say that grep owns the history variable, so
> vc-git-grep should be responsible for performing the transformations in
> either direction, when using the history variable for prompting, and
> when saving to it?

Yes, something like that.

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