From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Shawn O. Pearce" <spearce@spearce.org>
Subject: Re: How to fetch missing pack
Date: Thu, 24 Apr 2008 02:08:57 -0400
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References: <slrng019fg.nd8.joerg@alea.gnuu.de> <20080413094131.GA9437@xp.machine.xx> <slrng0v8h8.ujv.joerg@alea.gnuu.de> <200804240801.13674.chriscool@tuxfamily.org>
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Cc: Christian Couder <chriscool@tuxfamily.org>, git@vger.kernel.org
To: =?utf-8?B?SsO2cmc=?= Sommer <joerg@alea.gnuu.de>
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Christian Couder <chriscool@tuxfamily.org> wrote:
> Le mercredi 23 avril 2008, J=C3=B6rg Sommer a =C3=A9crit :
> > Peter Baumann <waste.manager@gmx.de> wrote:
> > >
> > > Try using git fsck --full to check you repo. If you are missing s=
ome
> > > objects, you could just grab them from another valid repo which s=
till
> > > has them.
> >
> > How can I exctract single objects from a pack?
>=20
> Please have a look at this:
>=20
> http://git.or.cz/gitwiki/GitFaq#head-ac11406480d09e2df98588e800e41b72=
56602074

If you know the name of the objects you are missing, you can
make a temporary pack to transfer the list of objects:

	# at good repo
	#
	git pack-objects --stdout <object.list >save.pack

	# at bad repo
	#
	git index-pack --stdin <save.pack

Make object.list just one SHA-1 per line.  The resulting pack is
not likely to be highly compressed, as it will probably contain
a non-delta version of each object, but its faster to create than
calling git-cat-file for each object, and may give you a smaller
pack than just copying everything as the FAQ entry recommends.

Note that you may need to do this several times; e.g. if you are
missing a tree you won't know what blobs you are missing until
you load the tree and run fsck --full again to parse the tree and
discover the missing blobs.  This iterative copying approach is
what the FAQ avoids when it suggests you copy everything.

--=20
Shawn.