From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Eric S. Raymond" Subject: Re: I have end-of-lifed cvsps Date: Thu, 12 Dec 2013 13:29:32 -0500 Organization: Eric Conspiracy Secret Labs Message-ID: <20131212182932.GB16960@thyrsus.com> References: <20131212001738.996EB38055C@snark.thyrsus.com> <20131212042624.GB8909@thyrsus.com> <20131212171756.GA6954@inner.h.apk.li> Reply-To: esr@thyrsus.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Martin Langhoff , Git Mailing List To: Andreas Krey X-From: git-owner@vger.kernel.org Thu Dec 12 19:29:43 2013 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VrB10-0005fB-8z for gcvg-git-2@plane.gmane.org; Thu, 12 Dec 2013 19:29:38 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751653Ab3LLS3e (ORCPT ); Thu, 12 Dec 2013 13:29:34 -0500 Received: from static-71-162-243-5.phlapa.fios.verizon.net ([71.162.243.5]:40959 "EHLO snark.thyrsus.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751092Ab3LLS3d (ORCPT ); Thu, 12 Dec 2013 13:29:33 -0500 Received: by snark.thyrsus.com (Postfix, from userid 1000) id 8722B380445; Thu, 12 Dec 2013 13:29:32 -0500 (EST) Content-Disposition: inline In-Reply-To: <20131212171756.GA6954@inner.h.apk.li> X-Eric-Conspiracy: There is no conspiracy User-Agent: Mutt/1.5.21 (2010-09-15) Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: Andreas Krey : > But anyway, the replacement question is a) how fast the cvs-fast-export is > and b) whether its output is stable, that is, if the cvs repo C yields > a git repo G, will then C with a few extra commits yield G' where every > commit in G (as identified by its SHA1) is also in G', and G' additionally > contains the new commits that were made to the CVS repo. > > If that is the case you effectively have an incremental mode, except that > it's not quite as fast. I am almost certain the output of cvs-fast-export is stable. I believe the output of cvsps-3.x was, too. Not sure about 2.x. I wrote the output stages for both cvsps-3.x and cvs-fast-export, and went to some effort to verify that they write streams in the same "most natural" way - marks sequential from :1, blobs always witten as late as possible, fileops in the same sort order the git tools emit, etc. I have added writing a regression test test to verify the stability property to the TODO list. I will have this nailed down before the next point release, in a few days. -- Eric S. Raymond