Using subtree with vcsh and mr?

[Adam Spiers]

On 8 August 2014 17:05, Michael McCracken <michael.mccracken at gmail.com> wrote:
> On Fri, Aug 8, 2014 at 8:56 AM, Richard Hartmann <richih.mailinglist at gmail.com> wrote:
>> On Fri, Aug 8, 2014 at 4:34 PM, Michael McCracken <michael.mccracken at gmail.com> wrote:
>> > I suspect I'm missing a straightforward way to solve this, but in searching
>> > through the vcsh issues on github, it seems like it wasn't solved (or no
>> > one updated the issue, #27 [1]).
>>
>> I talked to the authors of `git submodule` about this issue at the
>> last CeBIT, but the very short version is that this is hard for
>> submodule-internal reasons but that `git subtree` is working
>
> That sounds like good news. At the risk of sounding dense, is there any
> example of it working with mr & vcsh that I can learn from?

Why is git subtree or submodule required at all?  Can't vcsh just set
GIT_DIR to something other than $HOME?