From: Avery Pennarun <apenwarr@gmail.com>
Date: Wed, 21 Jul 2010 21:20:33 GMT
Subject: Re: Avery Pennarun's git-subtree?
Message-ID: <AANLkTik0gqWjvHhULey89JuatjSSYsCwFegfr6E4bUKx@mail.gmail.com>
In-Reply-To: <AANLkTimiROxqf7KcRKTZvMvsFdd4w3jK_GLeZR8n7tdA@mail.gmail.com>

On Wed, Jul 21, 2010 at 5:09 PM, Avery Pennarun <apenwarr@gmail.com> wrote:
> All the submodules have
> to get pushed to and fetched from the same repo by default.  Anything
> else is insane.

...and just to clarify, by far the least insane option here is to have
the whole thing all under a single ref, which is currently impossible
with submodules.

>> What's missing from that (which would be nice) is the ability to check
>> out a subdirectory from another repository. That could (I think) be
>> done by just adding a normal "tree" entry, and then specifying that
>> that tree can be found in git://... instead of the main tree.
>
> Actually that's already easy with submodules (and git-subtree makes it
> easy too, though slightly different).  Just fetch the commit from the
> other repo, and do:
>
>   git checkout FETCH_HEAD -- subdirname

Sorry, that's not right.  You can use this instead for roughly the
effect you want:

    git read-tree --prefix subdirname FETCH_HEAD: && git checkout subdirname

Have fun,

Avery