Re: git pack/unpack over bittorrent - works!

From: Luke Kenneth Casson Leighton <luke.leighton@gmail.com>
Date: Sep 3, 2010, 10:23 UTC
Message-ID: <AANLkTi=r21khJLMvwH7h2M_Yqv8QFAD-L2RX8NrbEjoc@mail.gmail.com>
In-Reply-To: <alpine.LFD.2.00.1009021931340.19366@xanadu.home>

very quick reply am off out

On Fri, Sep 3, 2010 at 1:29 AM, Nicolas Pitre <nico@fluxnic.net> wrote:

Show 8 quoted lines

>> sooo.... taking a wild guess, here: if you were to parse the .idx file
>> and extract the list of object-refs, and then pass that to "git
>> pack-objects --window=0 --delta=0", would you end up with the exact
>> same pack file, because you'd forced git pack-objects to only return
>> that specific list of object-refs?
>
> If you do this i.e. turn off delta compression, then the 615 MB
> repository above will turn itself into a multi-gigabyte pack!

 sorry nicolas, i believe you may have misunderstood.  first obtain
.idx which will return a delta-compressed list of objects, yes?  then
use --window=0 --delta=0 with exact same list, surely you will end up
with the exact same list which you gave to the *previous* command,
yes?

$ git pack-objects

>> .pack and .idx

$ mv .pack .pack2 $ extract_pack_objects_from_idx.sh .idx > foo $ git pack-objects --window=0 --delta=0 < foo $ diff .pack .pack2

so no, of _course_ not just ask --window=0 --delta=0 for the very first run: if that's what i'd said, that would indeed be dumb.

l.