* bug#71461: 30.0.50; Want VC command to view a single revision like a patch
@ 2024-06-10 8:00 Sean Whitton via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-06-10 21:06 ` Dmitry Gutov
0 siblings, 1 reply; 4+ messages in thread
From: Sean Whitton via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2024-06-10 8:00 UTC (permalink / raw)
To: 71461; +Cc: juri, dmitry
X-debbugs-cc: juri@linkov.net, dmitry@gutov.dev
Hello,
I do security work which involves backporting specific upstream commits
to older versions of the software. I often end up with a list of
revision hashes and I use 'git cherry-pick -x' to grab them.
While resolving conflicts, I often just want to look at a summary of a
single revision. I want to see the revision's root diff, and sometimes
also its log message.
This isn't very easy with VC at present. There is
C-x v b L <revision> RET =
and
C-u C-x v D <revision>~1 RET <revision> RET
but neither are very nice (and the latter requires you to specify the
previous revision using VCS-specific notation).
Could we add a backend-generic command for this?
And might we bind it under 'C-x v' ?
I came up with the following as a start; it's not great.
--8<---------------cut here---------------start------------->8---
(defun vc-root-revision (rev)
(interactive (list (vc-read-revision "Revision to show: ")))
(let ((patch (vc-call-backend (vc-responsible-backend default-directory)
'prepare-patch rev))
(buf (get-buffer-create "*vc-revision*")))
(set-buffer buf)
(let ((inhibit-read-only t))
(erase-buffer)
(insert-buffer-substring (plist-get patch :buffer)
(plist-get patch :body-start)
(plist-get patch :body-end)))
(setq buffer-read-only t)
(diff-mode)
(pop-to-buffer buf)
(goto-char (point-min))))
--8<---------------cut here---------------end--------------->8---
--
Sean Whitton
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#71461: 30.0.50; Want VC command to view a single revision like a patch
2024-06-10 8:00 bug#71461: 30.0.50; Want VC command to view a single revision like a patch Sean Whitton via Bug reports for GNU Emacs, the Swiss army knife of text editors
@ 2024-06-10 21:06 ` Dmitry Gutov
[not found] ` <87plsoysxk.fsf@melete.silentflame.com>
0 siblings, 1 reply; 4+ messages in thread
From: Dmitry Gutov @ 2024-06-10 21:06 UTC (permalink / raw)
To: Sean Whitton, 71461; +Cc: juri
Hi!
On 10/06/2024 11:00, Sean Whitton wrote:
> While resolving conflicts, I often just want to look at a summary of a
> single revision. I want to see the revision's root diff, and sometimes
> also its log message.
>
> This isn't very easy with VC at present. There is
> C-x v b L <revision> RET =
> and
> C-u C-x v D <revision>~1 RET <revision> RET
> but neither are very nice (and the latter requires you to specify the
> previous revision using VCS-specific notation).
There is this somewhat clunky sequence: M-1 C-x v L <revision> RET
Does this work for you?
There is description for this subfeature in vc-print-root-log's docstring.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2024-06-10 8:00 bug#71461: 30.0.50; Want VC command to view a single revision like a patch Sean Whitton via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-06-10 21:06 ` Dmitry Gutov
[not found] ` <87plsoysxk.fsf@melete.silentflame.com>
2024-06-11 11:40 ` Dmitry Gutov
2024-06-14 1:05 ` Sean Whitton via Bug reports for GNU Emacs, the Swiss army knife of text editors
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