From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Stephen J. Turnbull" Newsgroups: gmane.emacs.devel Subject: Re: Everyone, please stop making my life more difficult Date: Sat, 13 Sep 2014 02:44:06 +0900 Message-ID: <8738bw68ex.fsf@uwakimon.sk.tsukuba.ac.jp> References: <20140912043652.4D6D8380604@snark.thyrsus.com> <83zje56ymd.fsf@gnu.org> <20140912083430.GA32586@thyrsus.com> <87mwa59i1r.fsf@igel.home> <87ioksx5v8.fsf@fencepost.gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 X-Trace: ger.gmane.org 1410544004 24226 80.91.229.3 (12 Sep 2014 17:46:44 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 12 Sep 2014 17:46:44 +0000 (UTC) Cc: emacs-devel@gnu.org To: sds@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Sep 12 19:46:37 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 1XSUva-0002hq-O6 for ged-emacs-devel@m.gmane.org; Fri, 12 Sep 2014 19:46:34 +0200 Original-Received: from localhost ([::1]:46645 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XSUva-0002Ef-EF for ged-emacs-devel@m.gmane.org; Fri, 12 Sep 2014 13:46:34 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:37130) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XSUtV-0000iX-O5 for emacs-devel@gnu.org; Fri, 12 Sep 2014 13:44:33 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XSUtM-0005GM-6K for emacs-devel@gnu.org; Fri, 12 Sep 2014 13:44:25 -0400 Original-Received: from shako.sk.tsukuba.ac.jp ([130.158.97.161]:47011) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XSUtL-0005FN-Mg; Fri, 12 Sep 2014 13:44:16 -0400 Original-Received: from uwakimon.sk.tsukuba.ac.jp (uwakimon.sk.tsukuba.ac.jp [130.158.99.156]) by shako.sk.tsukuba.ac.jp (Postfix) with ESMTP id 96F8F1C3AF6; Sat, 13 Sep 2014 02:44:06 +0900 (JST) Original-Received: by uwakimon.sk.tsukuba.ac.jp (Postfix, from userid 1000) id 85FA61A2829; Sat, 13 Sep 2014 02:44:06 +0900 (JST) In-Reply-To: X-Mailer: VM undefined under 21.5 (beta34) "kale" acf1c26e3019 XEmacs Lucid (x86_64-unknown-linux) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 130.158.97.161 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:174248 Archived-At: Sam Steingold writes: > I thought that rebase _moves_ commits, not _creates_ them anew. It's easy to that this must be so. The data of a commit, in all of the DAG-based VCSes, not just git, contains the parent of that commit. Rebase by definition changes the parent of at least one commit, and therefore must create new a commit to store it. I'm sure you can handle the recursive proof for the descendants of that commit. OTOH, rebase merely moves *trees*; those (and the blobs that they point to in turn) are not rewritten.