From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ramkumar Ramachandra Subject: [GSoC update] git-remote-svn: Week 9 Date: Thu, 1 Jul 2010 15:13:10 +0200 Message-ID: <20100701131310.GA28607@debian> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Sverre Rabbelier , Jonathan Nieder , David Michael Barr , Daniel Shahaf , Sam Vilain , Eric Wong , Junio C Hamano , "Shawn O. Pearce" To: Git Mailing List X-From: git-owner@vger.kernel.org Thu Jul 01 15:37:56 2010 Return-path: Envelope-to: gcvg-git-2@lo.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1OUJxj-0000Z0-On for gcvg-git-2@lo.gmane.org; Thu, 01 Jul 2010 15:37:56 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754312Ab0GANhu (ORCPT ); Thu, 1 Jul 2010 09:37:50 -0400 Received: from mail-fx0-f46.google.com ([209.85.161.46]:62607 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752677Ab0GANhs (ORCPT ); Thu, 1 Jul 2010 09:37:48 -0400 Received: by fxm14 with SMTP id 14so1286668fxm.19 for ; Thu, 01 Jul 2010 06:37:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:date:from:to:cc:subject :message-id:mail-followup-to:mime-version:content-type :content-disposition:user-agent; bh=5QLcg46HnWGQ+ub4LmXnrYtHpkLgTmrweeE9PU6HTEw=; b=BANq6CBX5wDqo6Z9jLrdByyCpSl3Lrqlr7D8AuZumLzX4aAWphy0edmPJp/LDH5JuG OQ6K5+bcZUmmAUHoad9DGsbDF8IlNCQOqKDiuVyvP+g+puSFXC8HPu7glGD6UswzS9Ep g0Z7EpmLy7FF2/XN8ExjVOoj8UbWmZN/NsG5A= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:mail-followup-to:mime-version :content-type:content-disposition:user-agent; b=SFyj+xk5ETPchTTaPDiWP5B91CChI+Ts2H1yQF3zoewmfkf2gl7TyHnyXLB7P4+j4S jIGAyeh6PrdH8XG/UBEOT38zQ1ulQ+SEKwgFdO1CbfZILlEOzl6/GXciAKKHw3qtEOuU uZVUYaIIDB6VDSsVy6uMQ0rORJBu77b1ZNSiQ= Received: by 10.223.99.212 with SMTP id v20mr9471839fan.44.1277989890049; Thu, 01 Jul 2010 06:11:30 -0700 (PDT) Received: from debian (adm12-98.itu.dk [130.226.133.98]) by mx.google.com with ESMTPS id p21sm53087746fak.45.2010.07.01.06.11.26 (version=TLSv1/SSLv3 cipher=RC4-MD5); Thu, 01 Jul 2010 06:11:28 -0700 (PDT) Mail-Followup-To: Git Mailing List , Sverre Rabbelier , Jonathan Nieder , David Michael Barr , Daniel Shahaf , Sam Vilain , Eric Wong , Junio C Hamano , "Shawn O. Pearce" Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: Hi, In terms of code, this week was unproductive. However, there was one very long and productive discussion about the design of svn-fe. We can now prove that the design of svn-fe is most efficient, and that any other dumpfile importer will do worse than svn-fe. I'll put this proof down in another email, and use this one for just a status update. We have also determined that some some extensions to git-fast-import will significantly reduce the complexity of svn-fe. Here are the current list of tasks along with their status: 1. The svnclient_ra. I have stopped working on a stopgap implementation of svnclient_ra that dumps full text/ props; to do this, it needs to interrupt a replay and open a new connection- it seems that this is quite non-trivial to get right. I've decided to complete the delta dump generator instead. Unfortunately, this means that I won't have a complete chain to show a remote helper by mid-term evaluations: just individual components. 2. Ternary treap fork. This only changes the underlying data structure- nothing else should change. David is close to completing this. 3. Make svn-fe support deltified dumps. This can only be done after we have a Git object store backing. Deferred for the moment. 4. git-fast-import only supports filecopy for trees from the parent commit; make it support copies from all commits. Jonathan has already sent an RFC patch on the list for this. 5. Zero-tree fork. svn-fe currently maintains trees for all revisions; Jonathan suggested that it can lazily fetch tree objects from the Git store backing. This change will significantly reduce the complexity of svn-fe. 6. git-fast-import needs to be extended to print-marks. Sverre suggested this, and Jonathan has sent an RFC patch on the list. This is required for the Git object store to communicate back commit hashes to the caller (svn-fe in this case). In other news, we managed to get colabti.org to log the channel where we have most of our discussions: #git-devel on Freenode IRC. This information is probably helpful for other GSoC students and developers who are looking to collaborate on projects. -- Ram