From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Eric S. Raymond" Newsgroups: gmane.emacs.devel Subject: Re: Everyone, please stop making my life more difficult Date: Fri, 12 Sep 2014 12:12:40 -0400 Organization: Eric Conspiracy Secret Labs Message-ID: <20140912161240.GB5086@thyrsus.com> References: <20140912043652.4D6D8380604@snark.thyrsus.com> <83zje56ymd.fsf@gnu.org> <20140912083430.GA32586@thyrsus.com> <87mwa59i1r.fsf@igel.home> <87ioksx5v8.fsf@fencepost.gnu.org> Reply-To: esr@thyrsus.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1410538576 14559 80.91.229.3 (12 Sep 2014 16:16:16 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 12 Sep 2014 16:16:16 +0000 (UTC) Cc: Emacs developers To: Yuri Khan Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Sep 12 18:16:10 2014 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 1XSTW6-0000zZ-7u for ged-emacs-devel@m.gmane.org; Fri, 12 Sep 2014 18:16:10 +0200 Original-Received: from localhost ([::1]:46206 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XSTW5-0005ZB-Oj for ged-emacs-devel@m.gmane.org; Fri, 12 Sep 2014 12:16:09 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44958) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XSTSo-0001oO-Ua for emacs-devel@gnu.org; Fri, 12 Sep 2014 12:12:51 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XSTSk-0006ZX-2I for emacs-devel@gnu.org; Fri, 12 Sep 2014 12:12:46 -0400 Original-Received: from static-71-162-243-5.phlapa.fios.verizon.net ([71.162.243.5]:34715 helo=snark.thyrsus.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XSTSj-0006Yu-Mu for emacs-devel@gnu.org; Fri, 12 Sep 2014 12:12:41 -0400 Original-Received: by snark.thyrsus.com (Postfix, from userid 1000) id 0EDEF38066F; Fri, 12 Sep 2014 12:12:40 -0400 (EDT) Content-Disposition: inline In-Reply-To: X-Eric-Conspiracy: There is no conspiracy User-Agent: Mutt/1.5.21 (2010-09-15) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 71.162.243.5 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:174234 Archived-At: Yuri Khan : > Neither does author/timestamp uniquely identify a commit in a > rebaseful commit graph. But at least the commits having the same > author/timestamp all conceptually represent the same change. That is an interesting point. We are still at a point where I could, theoretically, change this. I could run the through the revision-ID mapping replacing committer-based version stamps with author-based version stamps. I am not sure this would be a good idea, though. It wouldn't actually eliminate the multiple-target problem in searches using revision stamps as keys; the best it would do is support an argument that the ambiguity might not matter as much. Maybe - usually when a branch is rebased on to trunk it's because someone is treating *that* as a conceptual unit too, representing a feature landing. And we really aren't guaranteed that future VCSes will have the distinction; darcs, or something else like it based on a patch algebra, could still win. For now, I ask everyone to generate committer-based version stamps. If we switch, I'll do it in one big operation. -- Eric S. Raymond