* Retrospectively add alternates to a repository?
@ 2010-02-26 23:54 Steve Folly
2010-02-27 2:37 ` Tay Ray Chuan
0 siblings, 1 reply; 7+ messages in thread
From: Steve Folly @ 2010-02-26 23:54 UTC (permalink / raw)
To: git
Hi,
I have a local mirror of a remote repository (to save time
cloning over a slow network). But before I created the
local mirror I already cloned the remote repo directly.
Is it possible to retrospectively add an alternates spec
to this local repository (the equivalent of doing what
--reference does during the clone)?
Thanks for any help.
Regards,
Steve
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Retrospectively add alternates to a repository?
2010-02-26 23:54 Retrospectively add alternates to a repository? Steve Folly
@ 2010-02-27 2:37 ` Tay Ray Chuan
2010-02-27 8:34 ` Jeff King
0 siblings, 1 reply; 7+ messages in thread
From: Tay Ray Chuan @ 2010-02-27 2:37 UTC (permalink / raw)
To: Steve Folly; +Cc: git
Hi,
On Sat, Feb 27, 2010 at 7:54 AM, Steve Folly <steve@spfweb.co.uk> wrote:
> I have a local mirror of a remote repository (to save time
> cloning over a slow network). But before I created the
> local mirror I already cloned the remote repo directly.
>
> Is it possible to retrospectively add an alternates spec
> to this local repository (the equivalent of doing what
> --reference does during the clone)?
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
--
Cheers,
Ray Chuan
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Retrospectively add alternates to a repository?
2010-02-27 2:37 ` Tay Ray Chuan
@ 2010-02-27 8:34 ` Jeff King
2010-02-27 11:43 ` Steve Folly
0 siblings, 1 reply; 7+ messages in thread
From: Jeff King @ 2010-02-27 8:34 UTC (permalink / raw)
To: Tay Ray Chuan; +Cc: Steve Folly, git
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
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Retrospectively add alternates to a repository?
2010-02-27 8:34 ` Jeff King
@ 2010-02-27 11:43 ` Steve Folly
2010-02-27 12:30 ` Jeff King
0 siblings, 1 reply; 7+ messages in thread
From: Steve Folly @ 2010-02-27 11:43 UTC (permalink / raw)
To: git
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
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: Retrospectively add alternates to a repository?
2010-02-27 11:43 ` Steve Folly
@ 2010-02-27 12:30 ` Jeff King
2010-05-16 13:55 ` Felipe Contreras
0 siblings, 1 reply; 7+ messages in thread
From: Jeff King @ 2010-02-27 12:30 UTC (permalink / raw)
To: Steve Folly; +Cc: git
On Sat, Feb 27, 2010 at 11:43:55AM +0000, Steve Folly wrote:
> I now have a plan to write a script to attach and
> detach repositories to and from local mirrors on demand:
I think they should work, but:
> attach =
> echo "/path/to/mirror" > .git/objects/info/alternates &&
> git repack -adl &&
> git repack -ad &&
> git repack -adl
I don't think the first repack is doing anything (I showed it in my
example only to show that it was not actually working).
-Peff
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Retrospectively add alternates to a repository?
2010-02-27 12:30 ` Jeff King
@ 2010-05-16 13:55 ` Felipe Contreras
2010-05-22 5:38 ` Jeff King
0 siblings, 1 reply; 7+ messages in thread
From: Felipe Contreras @ 2010-05-16 13:55 UTC (permalink / raw)
To: Jeff King; +Cc: Steve Folly, git
On Sat, Feb 27, 2010 at 3:30 PM, Jeff King <peff@peff.net> wrote:
> On Sat, Feb 27, 2010 at 11:43:55AM +0000, Steve Folly wrote:
>> attach =
>> echo "/path/to/mirror" > .git/objects/info/alternates &&
>> git repack -adl &&
>> git repack -ad &&
>> git repack -adl
>
> I don't think the first repack is doing anything (I showed it in my
> example only to show that it was not actually working).
That's a bug, isn't it? Has anyone taken a look into it?
--
Felipe Contreras
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Retrospectively add alternates to a repository?
2010-05-16 13:55 ` Felipe Contreras
@ 2010-05-22 5:38 ` Jeff King
0 siblings, 0 replies; 7+ messages in thread
From: Jeff King @ 2010-05-22 5:38 UTC (permalink / raw)
To: Felipe Contreras; +Cc: Steve Folly, git
On Sun, May 16, 2010 at 04:55:21PM +0300, Felipe Contreras wrote:
> On Sat, Feb 27, 2010 at 3:30 PM, Jeff King <peff@peff.net> wrote:
> > On Sat, Feb 27, 2010 at 11:43:55AM +0000, Steve Folly wrote:
> >> attach =
> >> echo "/path/to/mirror" > .git/objects/info/alternates &&
> >> git repack -adl &&
> >> git repack -ad &&
> >> git repack -adl
> >
> > I don't think the first repack is doing anything (I showed it in my
> > example only to show that it was not actually working).
>
> That's a bug, isn't it? Has anyone taken a look into it?
Yes, it's a bug. I don't think anybody is looking at it. I started to
write a length explanation, but the more I thought about it, the more I
am not actually sure what is going on. So please, if you are interested,
take a look and see if you can come up with a patch.
-Peff
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2010-05-22 5:41 UTC | newest]
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-- links below jump to the message on this page --
2010-02-26 23:54 Retrospectively add alternates to a repository? Steve Folly
2010-02-27 2:37 ` Tay Ray Chuan
2010-02-27 8:34 ` Jeff King
2010-02-27 11:43 ` Steve Folly
2010-02-27 12:30 ` Jeff King
2010-05-16 13:55 ` Felipe Contreras
2010-05-22 5:38 ` Jeff King
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