From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: John Yates Newsgroups: gmane.emacs.devel Subject: vc-find-revision-no-save? Date: Sun, 23 Oct 2022 20:27:24 -0400 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="14085"; mail-complaints-to="usenet@ciao.gmane.io" To: Emacs developers Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Oct 24 08:35:03 2022 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 1omr37-0003Rc-UT for ged-emacs-devel@m.gmane-mx.org; Mon, 24 Oct 2022 08:35:01 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1omnby-00035Q-7T; Sun, 23 Oct 2022 22:54:46 -0400 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 1omlJa-00026D-Lw for emacs-devel@gnu.org; Sun, 23 Oct 2022 20:27:38 -0400 Original-Received: from mail-pj1-f54.google.com ([209.85.216.54]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1omlJY-0001Z5-Sv for emacs-devel@gnu.org; Sun, 23 Oct 2022 20:27:38 -0400 Original-Received: by mail-pj1-f54.google.com with SMTP id 3-20020a17090a0f8300b00212d5cd4e5eso5938268pjz.4 for ; Sun, 23 Oct 2022 17:27:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=iuJILYYA5V3Qts/yoMR1IS+YIzwTyCze8p7zr5aNDVY=; b=7jEKufFA1ZTdj1wY2nMNBmR9KkHI8gOHZdQw462q0OHbPUU4Zj56CR7virOklMd6lO c8i5DOHTgmXmVVqvgwPiZZof+aQ18zNv4kJVG8QMTOA7ySSRkun4f8wFS0/DMT/gHrxH 0XkPHURV7dvIX/sFa8E4VErZUxDYvzoXG/jDb55OhgmNcAudpmspI6d7Lo1EzWuqRL4m 7QJWSF3Om8YokWks8KOd+xA/E+biLYZUmT1R2TokNmUdbgCFncCo8SXt6gW6JBz7Ggl0 ZmYUIrMJUud1AJh6G4x3Zp3vfJrq6STko7meneNQnhZTKkPsjHomidJ/i4tYuxNqAf10 b4Pg== X-Gm-Message-State: ACrzQf14SIys8lX6HXs+jsRcaqOr5q9C6uNQ/sMN31V26nWetdfCwPQw 90+ttqWA/JYqjrxj8kdUZHXWfzWelppr9rBYNRD4MtYKBrI= X-Google-Smtp-Source: AMsMyM6+g0uUQf9vybJ5t38vFAaZuFd3u2se+gpeky3+08aMe5xvLniMT1Iv0BJCbEJeJgDL8A/Wq7iIEn/RlFcy0B0= X-Received: by 2002:a17:90b:1806:b0:20d:a753:7d4b with SMTP id lw6-20020a17090b180600b0020da7537d4bmr35928785pjb.160.1666571254939; Sun, 23 Oct 2022 17:27:34 -0700 (PDT) Received-SPF: pass client-ip=209.85.216.54; envelope-from=john.yates.sheets@gmail.com; helo=mail-pj1-f54.google.com X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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: , Original-Sender: "Emacs-devel" Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:298343 Archived-At: (I am working on incorporating git-timemachine-like functionality into vc. If I should post questions such as the following in help-gnu-emacs, just let me know.) vc.el contains the following defcustom: (defcustom vc-find-revision-no-save nil "If non-nil, `vc-find-revision' doesn't write the created buffer to file." :type 'boolean :version "27.1") Notice that the default is nil. What is the logic in allowing an historic revision to be associated with a file? Why is it not merely a readonly buffer with no backing file? Perhaps I have been too influenced by git... My mental model is that revisions are immutable _values_. Is that not vc's model?