GNU bug report logs - #65854
Multi-file replacement diff

Previous Next

Full log

Message #20 received at 65854 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Eshel Yaron <me <at> eshelyaron.com>
Cc: 65854 <at> debbugs.gnu.org, juri <at> linkov.net
Subject: Re: bug#65854: Multi-file replacement diff
Date: Mon, 11 Sep 2023 15:35:47 +0300

> Cc: 65854 <at> debbugs.gnu.org
> Date: Mon, 11 Sep 2023 09:23:37 +0200
> From:  Eshel Yaron via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> >> I wonder what happens if I call `multi-file-replace-regexp-as-diff` and
> >> select a file `foo.txt`, that I already have open and modified in a
> >> buffer.  IIUC, this will generate the diff based on the contents of the
> >> file on disk, not the buffer, so it might not match when I subsequently
> >> try to apply the diff to the buffer.  WDYT?
> >
> > For such cases you can use multi-buffer-replace-regexp-as-diff
> > from this patch instead of multi-file-replace-regexp-as-diff.
> 
> Well, in the simple example of one file, yes that possible, but the
> point is that you don't always know (or worry about) whether there's an
> overlap between the files you have open and modified and the files your
> regexp/wildcard matches.  Let's say I'm editing an HTML file, and find
> something that I'd like to change.  So I do it.  Than I think "actually,
> let's change that across all my HTML files in this directory".  IMO It
> would be great if I could use this new command,
> `multi-file-replace-regexp-as-diff`, to get a diff showing how that'd
> look.  But in the proposed implementation, that won't work if one of
> those HTML files is open and modified--without any warning, Emacs would
> create a diff that doesn't apply.

Our usual paradigm for these commands is to offer saving any buffers
with unsaved edits, before running the main part of the command.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.