On Sun, Oct 28, 2012 at 02:59:33PM -0700, Shawn Pearce wrote:
> Looks like the Gerrit meaning is basically the same as Ævar's. Gerrit
> updates the parent project as if you had done:
> 
>   $ git submodule foreach 'git checkout $(git config --file
> $toplevel/.gitmodules submodule.$name.branch) && git pull'
>   $ git commit -a -m "Updated submodules"
>   $ git push

Ah, good, then we *are* all using the option for the same thing.

> On Tue, Oct 23, 2012 at 2:57 PM, W. Trevor King <wking@tremily.us> wrote:
> > I'm not clear on what that means, but they accept special values like
> > '.', so their usage is not compatible with Ævar's proposal.
> 
> "." is a special value to mean use the parent project's branch name.
> So its more like this:
> 
>   $ git submodule foreach 'git checkout $(git --git-dir $toplevel/.git
> read-ref HEAD | sed s,^refs/heads/,,) && git pull'
>   $ git commit -a -m "Updated submodules"
>   $ git push
> 
> We use "." in Gerrit to make branching an entire forest of projects
> easier. Setting up dev-fix-yy in the parent project will automatically
> track dev-fix-yy in each submodule.

Ok.  If we wanted "." expansion to be a general submodule thing, it
would add a special case to Phil's submodule_<var-name> export.  I
don't think such a special case would be worth the mental overhead,
but obviously the Gerrit folks think it is.  I don't care either way
on this one.

Trevor

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