From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Juri Linkov Newsgroups: gmane.emacs.devel Subject: Re: Thoughts on support for vc-diff unsaved buffer contents? Date: Sat, 23 Nov 2024 19:58:18 +0200 Organization: LINKOV.NET Message-ID: <87ttbxrfo9.fsf@mail.linkov.net> References: <68c0ce3e-8316-43db-8f3c-ead0ad028326@gmail.com> <878qtbogqi.fsf@mail.linkov.net> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31182"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/31.0.50 (x86_64-pc-linux-gnu) Cc: emacs-devel@gnu.org To: Campbell Barton Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Nov 23 19:05:23 2024 Return-path: Envelope-to: ged-emacs-devel@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 1tEuVX-00082V-AX for ged-emacs-devel@m.gmane-mx.org; Sat, 23 Nov 2024 19:05:23 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tEuUn-00058Y-LW; Sat, 23 Nov 2024 13:04:37 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tEuUl-00058P-88 for emacs-devel@gnu.org; Sat, 23 Nov 2024 13:04:35 -0500 Original-Received: from relay6-d.mail.gandi.net ([217.70.183.198]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tEuUj-000292-Hd for emacs-devel@gnu.org; Sat, 23 Nov 2024 13:04:35 -0500 Original-Received: by mail.gandi.net (Postfix) with ESMTPSA id BDF8FC0003; Sat, 23 Nov 2024 18:04:28 +0000 (UTC) In-Reply-To: (Campbell Barton's message of "Fri, 22 Nov 2024 20:05:07 +1100") X-GND-Sasl: juri@linkov.net Received-SPF: pass client-ip=217.70.183.198; envelope-from=juri@linkov.net; helo=relay6-d.mail.gandi.net X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:325630 Archived-At: >>> Hi, recently I've run into a situation where it's necessary to calculate >>> modified line ranges without first saving the buffer (where "modified" is >>> determined by a version control diff). >>> >>> I'm curious if this is something that might be supported - or, is already >>> supported (although I'm fairly sure it's not). >> 'diff-no-select' as well as 'multi-file-diff-no-select' accept >> unsaved buffers as their arguments. > > Thanks for the suggestion. > > The part I'm not sure about regarding `diff-no-select' & > `diff-buffer-with-file' is how they could work with version-control > (vc-diff or a related functions). > > As far as I can see the diff needs to be generated by version-control > (git/hg/svn etc) instead of a file - since the "original" file necessarily > exist as a file on disk. Probably there is no such existing function that uses vc-diff (and one of the backend commands such as vc-git-diff) on an unsaved working revision.