From: Nicolas Pitre <nico@fluxnic.net>
Date: Fri, 04 Feb 2011 02:45:57 GMT
Subject: Re: Q: does index-pack work in place on windows?
Message-ID: <alpine.LFD.2.00.1102032137230.12104@xanadu.home>
In-Reply-To: <7v1v3ozhij.fsf@alter.siamese.dyndns.org>

On Thu, 3 Feb 2011, Junio C Hamano wrote:

> Nicolas Pitre <nico@fluxnic.net> writes:
> 
> > However index-pack won't tell you what is broken in the pack when 
> > corruptions are to be found.
> 
> Yes, but at that point, you are pretty much lost anyway, as the only thing
> you can do to salvage salvageable parts of the broken pack, if you still
> trust its associated .idx file, is to walk the table of contents and ask
> for each individual object; knowing where the .pack or .idx is broken with
> the current verify-pack does not help you very much.

Well... given that you do have to compare both the generated index and 
the on-disk index at some point, it is then possible to identify 
corrupted objects and their location.  And with pack index version 2 
including a CRC for the packed data, you should be able to tell if the 
corruption is actually in the pack or in the index (or both if the final 
pack/index SHA1 sum doesn't match).


Nicolas