Re: git pack/unpack over bittorrent - works!

From: Luke Kenneth Casson Leighton <luke.leighton@gmail.com>
Date: Sep 2, 2010, 21:19 UTC
Message-ID: <AANLkTimTe8_P7uHA6Ytm3+3Ha7rygWHzrSFOUq7fdX-L@mail.gmail.com>
In-Reply-To: <AANLkTikSHXivniUk-1KU30Ws23ebnbDhOmjKmpmVH-Y9@mail.gmail.com>

sorry, shouldn't have hit send so quick.

On Thu, Sep 2, 2010 at 10:10 PM, Luke Kenneth Casson Leighton <luke.leighton@gmail.com> wrote:

> were talking about?  well, here it is *splat* - are you able to
> recreate the pack-object from that, for me, and if so please gimme
> again"

Show 5 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?

 becauuuuse... if soooo... then that's a solution!  you get the .idx
file first, you make sure that that's cached (and it's small, isn't
it, so that would be ok), then you transfer it around the network, and
you ask each repo if they can re-create the pack-object from the
contents of the .idx, if they can, blam, they're a seed/sharer for
that pack-object; if they can't, tough titty, they've probably had git
gc run, or had some more commits added, or whatever, and can't
participate, wow big deal, no great loss.

does that fly? :) if it doesn't fly (with --window=0 --delta=0) would it be easy to add an option to say "oi, gimme a pack with nothing but these refs, in exactly this order, no quibbling, no questions, just gimme"? and you could call it "the same as the original" because, duh, it would contain exactly the same objects as the original.

am i even vaaaguely along the right lines? *scratches head*.

l.