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Re: Reviewing git patches with the source file without applying the patc

From: mbork
Subject: Re: Reviewing git patches with the source file without applying the patch
Date: Tue, 05 Dec 2023 08:31:03 +0100
User-agent: mu4e 1.10.8; emacs 30.0.50

On 2023-12-04, at 22:59, wrote:

> Hello,
> I often receive patches (files generated by 'git format-path'
> command). I review these files in diff-mode. This is in most cases is
> enough. But sometimes, I want to see the source code before and after
> the change so that I can see the full context. I am not sure how to do
> this in emacs.
> diff-mode provides C-c C-c (which is diff-goto-source). This is great
> improvement, but it shows the source file only, not the changes before
> and after. I have to compute in my head the patch against the source
> file to undrestand the change. Additionally, diff-goto-source requires
> the path to the source file. I wish it would take the dir instead and it
> can compute the source file on its own.
> diff-mode also provides C-c C-e (which is diff-ediff-patch). This view
> is what I am looking for: it provides a view when I can see the source
> file before and after the change. However, diff-ediff-patch applies the
> change automatically, which is not what I want to do. Additionally,
> diff-ediff-patch generates .orig files which are also unwant.
> Any help is appreciated.

That is a great question, and I don't have a 100% solution, but I would
probably use Magit, which makes it easy to discard the changes after
(temporarily) applying the patch.


Marcin Borkowski

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