From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Sean Whitton via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#71461: 30.0.50; Want VC command to view a single revision like a patch Date: Mon, 10 Jun 2024 16:00:44 +0800 Message-ID: <878qzd1b2r.fsf@melete.silentflame.com> Reply-To: Sean Whitton Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="988"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: juri@linkov.net, dmitry@gutov.dev To: 71461@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Jun 10 10:26:11 2024 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sGaLy-000AYS-Hf for geb-bug-gnu-emacs@m.gmane-mx.org; 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Mon, 10 Jun 2024 08:00:47 +0000 (UTC) Original-Received: by melete.silentflame.com (Postfix, from userid 1000) id 8C6D97F49E1; Mon, 10 Jun 2024 09:00:44 +0100 (BST) Received-SPF: pass client-ip=34.202.193.197; envelope-from=spwhitton@spwhitton.name; helo=sendmail.purelymail.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:287019 Archived-At: 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 RET = and C-u C-x v D ~1 RET 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