Re: [PATCH] Get commits from remote repositories by HTTP

[tony . luck]

> ...and this is precisely why ls-tree actually outputs those "blob" and
> "tree" tags. ;-)

Doh!

Here's a fresh copy with "if [ $tag = tree ]".  I just used it to pull
from Linus into an "empty" directory (just ran init-db to make the .git
.git/objects and .git/objects/xx directories).

-Tony


#!/bin/bash

# Copyright (C) 2005 Tony Luck

REMOTE=http://www.kernel.org/pub/linux/kernel/people/torvalds/linux-2.6.git/

rm -rf .gittmp
# set up a temp git repository so that we can use cat-file and ls-tree on the
# objects we pull without installing them into our tree. This allows us to
# restart if the download is interrupted
mkdir .gittmp
cd .gittmp
init-db

wget -q $REMOTE/HEAD

if cmp -s ../.git/HEAD HEAD
then
        echo Already have HEAD = `cat ../.git/HEAD`
        cd ..
        rm -rf .gittmp
        exit 0
fi

sha1=`cat HEAD`
sha1file=${sha1:0:2}/${sha1:2}

if [ -f ../.git/objects/$sha1file ]
then
        echo Already have most recent commit. Update HEAD to $sha1
        cd ..
        rm -rf .gittmp
        exit 0
fi

wget -q $REMOTE/objects/$sha1file -O .git/objects/$sha1file

treesha1=`cat-file commit $sha1 | (read tag tree ; echo $tree)`

get_tree()
{
        treesha1file=${1:0:2}/${1:2}
        if [ -f ../.git/objects/$treesha1file ]
        then
                return
        fi
        wget -q $REMOTE/objects/$treesha1file -O .git/objects/$treesha1file
        ls-tree $1 | while read mode tag sha1 name
        do
                subsha1file=${sha1:0:2}/${sha1:2}
                if [  -f ../.git/objects/$subsha1file ]
                then
                        continue
                fi
                if [ $tag = tree ]
                then
                        get_tree $sha1 `expr $2 + 1`
                else
                        echo objects/$subsha1file >> needbloblist
                fi
        done
}

# get all the tree objects to our .gittmp area, and create list of needed blobs
get_tree $treesha1

# now get the blobs
cd ../.git
if [ -s ../.gittmp/needbloblist ]
then
        wget -q -r -nH  --cut-dirs=6 --base=$REMOTE -i ../.gittmp/needbloblist
fi

# Now we have the blobs, move the trees and commit from .gitttmp
cd ../.gittmp/.git/objects
find ?? -type f -print | while read f
do
        mv $f ../../../.git/objects/$f
done

# update HEAD
cd ../..
mv HEAD ../.git

cd ..
rm -rf .gittmp
-
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