Jeff King <peff <at> peff.net> writes:
>
> On Sat, Feb 27, 2010 at 10:37:25AM +0800, Tay Ray Chuan wrote:
>
> > yes, just make sure the objects/info/alternates file points to the
> > location of that cloned repo's object directory; for example:
> >
> > $ echo /path/to/cloned/repo/.git/objects > .git/objects/info/alternates
>
> You will probably want to then get rid of anything in the child that is
> now available in the alternates repository.
>
> I would have thought "git repack -adl" works, but I think there is
> something a little funny in the logic. It reports "nothing new to pack",
> but does not delete the loose objects. But packing first then worked:
>
> $ git clone large-parent child
> $ echo $PWD/large-parent/.git/objects >child/.git/objects/info/alternates
> $ cd child
>
> $ du -sh .git/objects
> 51M .git/objects
>
> $ git repack -adl && du -sh .git/objects
> Nothing new to pack.
> 51M .git/objects
>
> $ git repack -ad && du -sh .git/objects
> Counting objects: 3, done.
> Delta compression using up to 2 threads.
> Compressing objects: 100% (2/2), done.
> Writing objects: 100% (3/3), done.
> Total 3 (delta 0), reused 0 (delta 0)
> 51M .git/objects
>
> $ git repack -adl && du -sh .git/objects
> Nothing new to pack.
> 20K .git/objects
>
> -Peff
>
Excellent, this is exactly what I need. Thanks very much Tay
and Jeff.
I now have a plan to write a script to attach and
detach repositories to and from local mirrors on demand:
attach =
echo "/path/to/mirror" > .git/objects/info/alternates &&
git repack -adl &&
git repack -ad &&
git repack -adl
detach =
git repack -a &&
rm .git/objects/info/alternates
Cheers,
Steve
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