From mboxrd@z Thu Jan  1 00:00:00 1970
From: Finn Arne Gangstad <finnag@pvv.org>
Subject: Re: Fetching SHA id's instead of named references?
Date: Mon, 6 Apr 2009 15:16:43 +0200
Message-ID: <20090406131643.GA16229@pvv.org>
References: <33f4f4d70904060513k320fb6a0ya928c714dcd11e89@mail.gmail.com> <alpine.DEB.1.00.0904061431020.6619@intel-tinevez-2-302> <33f4f4d70904060541s6dfb7e8ctf50f5e8a872ae1c@mail.gmail.com> <vpqprfq3ptb.fsf@bauges.imag.fr> <33f4f4d70904060606h4d014fbdibe195a83233d8899@mail.gmail.com>
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Cc: Matthieu Moy <Matthieu.Moy@imag.fr>,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	Git Users List <git@vger.kernel.org>
To: Klas Lindberg <klas.lindberg@gmail.com>
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On Mon, Apr 06, 2009 at 03:06:46PM +0200, Klas Lindberg wrote:
> On Mon, Apr 6, 2009 at 2:54 PM, Matthieu Moy <Matthieu.Moy@imag.fr> wrote:
> 
> > What Johannes pointed out is that someone could fetch from your repo
> > _after_ you correct the mistake (if you don't control garbage
> > collection).
> 
> Aha, ok. But how then does submodule update work? Git will only see
> SHA keys for each submodule in the cotntainer tree commit, so how does
> it perform fetching of those (unnamed) references?

git submodule update just does "git fetch" and hopes that the required
commit appears. In practice this means that you (may) need to invent a
tag or a branch for all the submodules, otherwise they are not
fetchable.

This bit us pretty hard when we tried to use submodules earlier, so we
gave up. Maybe some day...

- Finn Arne