Hey Ludo,

Thanks for reviewing :)

> It LGTM, and I like that it’s actually a small patch.
>
> Until now, we had conditionals like the ‘module-defined?’ thing above to
> allow for a smooth transition from older Guile-Git versions.  Do we want
> to keep doing that?
>
> If we do, then perhaps you should arrange so that uses of the new
> Guile-Git APIs that appeared in 0.3.0 are conditional.
>
> I’d say we should do it if it’s easy to do and not too intrusive.
> Otherwise, let’s just require 0.3.0 and be done with it.  (‘guix pull’
> gets 0.3.0 anyway.)

Here's a version with optional authentication support. I do not find it
too intrusive, but let me know what you think!

Thanks,

Mathieu