From mboxrd@z Thu Jan 1 00:00:00 1970 From: Junio C Hamano Subject: [PATCH] Short-circuit git-clone-pack while cloning locally (take 2). Date: Wed, 06 Jul 2005 13:04:21 -0700 Message-ID: <7vd5pvwvju.fsf@assigned-by-dhcp.cox.net> References: <20050704.125744.59481768.davem@davemloft.net> <7v8y0kxsfq.fsf_-_@assigned-by-dhcp.cox.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "David S. Miller" , Git Mailing List X-From: git-owner@vger.kernel.org Thu Jul 07 03:17:30 2005 Return-path: Received: from vger.kernel.org ([12.107.209.244]) by ciao.gmane.org with esmtp (Exim 4.43) id 1DqL0t-0006wj-0L for gcvg-git@gmane.org; Thu, 07 Jul 2005 03:17:15 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262283AbVGGBQc (ORCPT ); Wed, 6 Jul 2005 21:16:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262418AbVGGAXR (ORCPT ); Wed, 6 Jul 2005 20:23:17 -0400 Received: from fed1rmmtao09.cox.net ([68.230.241.30]:2975 "EHLO fed1rmmtao09.cox.net") by vger.kernel.org with ESMTP id S261801AbVGFUEY (ORCPT ); Wed, 6 Jul 2005 16:04:24 -0400 Received: from assigned-by-dhcp.cox.net ([68.4.60.172]) by fed1rmmtao09.cox.net (InterMail vM.6.01.04.00 201-2131-118-20041027) with ESMTP id <20050706200419.QLYP7275.fed1rmmtao09.cox.net@assigned-by-dhcp.cox.net>; Wed, 6 Jul 2005 16:04:19 -0400 To: Linus Torvalds User-Agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux) Sender: git-owner@vger.kernel.org Precedence: bulk X-Mailing-List: git@vger.kernel.org When we are cloning a repository on a local filesystem, it is faster to just create a hard linkfarm of .git/object hierarchy and copy the .git/refs files. By default, the script uses the clone-pack method, but it can be told with the -l flag to do the hard linkfarm (falling back on recursive file copy) to replicate the .git/object hierarchy. Signed-off-by: Junio C Hamano --- git-clone-script | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 67 insertions(+), 1 deletions(-) 2bff57b39b9fd13b1319d0192e2a887eb82fa189 diff --git a/git-clone-script b/git-clone-script --- a/git-clone-script +++ b/git-clone-script @@ -1,4 +1,70 @@ #!/bin/sh +# +# Copyright (c) 2005, Linus Torvalds +# Copyright (c) 2005, Junio C Hamano +# +# Clone a repository into a different directory that does not yet exist. + +usage() { + echo >&2 "* git clone [-l] " + exit 1 +} + +use_local=no +while + case "$#,$1" in + 0,*) break ;; + *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;; + *,-*) usage ;; + *) break ;; + esac +do + shift +done + repo="$1" dir="$2" -mkdir "$dir" && cd "$dir" && git-init-db && git-clone-pack "$repo" +mkdir "$dir" && +D=$( + (cd "$dir" && git-init-db && pwd) +) && +test -d "$D" || usage + +# We do local magic only when the user tells us to. +case "$use_local" in +yes) + ( cd "$repo/objects" ) || { + repo="$repo/.git" + ( cd "$repo/objects" ) || { + echo >&2 "-l flag seen but $repo is not local." + exit 1 + } + } + + # See if we can hardlink and drop "l" if not. + sample_file=$(cd "$repo" && \ + find objects -type f -print | sed -e 1q) + + # objects directory should not be empty since we are cloning! + test -f "$repo/$sample_file" || exit + + l= + if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null + then + l=l + fi && + rm -f "$D/.git/objects/sample" && + cp -r$l "$repo/objects" "$D/.git/" || exit 1 + + # Make a duplicate of refs and HEAD pointer + HEAD= + if test -f "$repo/HEAD" + then + HEAD=HEAD + fi + tar Ccf "$repo" - refs $HEAD | tar Cxf "$D/.git" - || exit 1 + exit 0 + ;; +esac + +cd "$D" && git clone-pack "$repo"