From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: RCS: (vc-next-action 1) only New Backend Date: Sat, 19 Sep 2015 13:40:26 +0300 Message-ID: <83twqqpu91.fsf@gnu.org> References: <87mvwjohyi.fsf@mat.ucm.es> <838u83r6hl.fsf@gnu.org> <87k2rn5ucg.fsf@mat.ucm.es> <837fnmrizs.fsf@gnu.org> <877fnm4wzn.fsf@mat.ucm.es> <876136lr83.fsf@fencepost.gnu.org> <83y4g2pxh3.fsf@gnu.org> <871tdulodu.fsf@fencepost.gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1442659255 23550 80.91.229.3 (19 Sep 2015 10:40:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 19 Sep 2015 10:40:55 +0000 (UTC) Cc: oub@mat.ucm.es, emacs-devel@gnu.org To: David Kastrup Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Sep 19 12:40:47 2015 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZdFZX-0002VL-HZ for ged-emacs-devel@m.gmane.org; Sat, 19 Sep 2015 12:40:47 +0200 Original-Received: from localhost ([::1]:45043 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZdFZW-0000vG-M6 for ged-emacs-devel@m.gmane.org; Sat, 19 Sep 2015 06:40:46 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41938) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZdFZG-0000v3-9z for emacs-devel@gnu.org; Sat, 19 Sep 2015 06:40:31 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZdFZE-0003Xn-LF for emacs-devel@gnu.org; Sat, 19 Sep 2015 06:40:30 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:60700) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZdFZ8-0003R7-Mh; Sat, 19 Sep 2015 06:40:22 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0NUX002006RJ2X00@a-mtaout22.012.net.il>; Sat, 19 Sep 2015 13:40:21 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NUX001EC6Z8PQ90@a-mtaout22.012.net.il>; Sat, 19 Sep 2015 13:40:21 +0300 (IDT) In-reply-to: <871tdulodu.fsf@fencepost.gnu.org> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 X-Received-From: 80.179.55.172 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:190094 Archived-At: > From: David Kastrup > Cc: oub@mat.ucm.es, emacs-devel@gnu.org > Date: Sat, 19 Sep 2015 12:00:45 +0200 > > Eli Zaretskii writes: > > >> From: David Kastrup > >> Cc: Eli Zaretskii , emacs-devel@gnu.org > >> Date: Sat, 19 Sep 2015 10:59:24 +0200 > >> > >> I seem to remember that some RCS-only features were debated and possibly > >> dropped at that time because ESR (along with a lot of others) were not > >> terribly sympathetic towards complicating the generic framework because > >> of the possibility of its continued use (mostly expected to be due to > >> nostalgia). > > > > I guess you are referring to this discussion: > > > > http://lists.gnu.org/archive/html/emacs-devel/2014-12/msg01164.html > > > > It talks about "rollback", whereas it seems that what was removed > > includes a possibility to tell RCS how to number the version it is > > about to commit. > > Entirely possible that this is what I remembered. However, the > responsible commit turns out to be a good match to my vague recollection > regarding content, commit message, date and author: > > commit 2f4f92007956983e6f5cb5136a57ddaa0cd9428e > Author: Eric S. Raymond > Date: Mon Dec 1 06:23:10 2014 -0500 > > VC API simplification: remove ability to set initial revision. > > This hasn't made any sense since RCS, and was a dumb stunt then. > > * vc/vc.el and all backends: API simplification; init-revision is > gone, and vc-registered functions no longer take an initial-revision > argument. > > and so my comments regarding the likely reaction to a wish for > resurrection of that feature are probably not wide off the mark. I already resurrected it. The motivation for removing that functionality was that it complicates the back-ends. I've made the REVISION argument to back-end's checkin method optional and silently ignored by back-ends that don't support it, so I don't think the back-ends should be affected, except by having that optional ignored arg. There was a similar ability in vc-register. I didn't restore it, because one can now register as usual and then immediately checkin a change with a specific version, thus allowing a reasonably convenient workaround without any need to change the back-ends yet again. (If I knew that removing this "rollback" also removes the ability to force a revision at checkin time, I'd have objected to the removal. But that never came up, AFAIR; instead, the only issue discussed at length was the meaning of "rollback" for modern VCSes.)