Junio C Hamano <gitster@xxxxxxxxx> writes:
> I think we need a protocol update to fix this; instead of sending
> "Now I want your tips and N commits behind it, please update my
> shallow bottom accordingly", which creates the above by giving you Z
> and 3 generations back and updates your cut-off point to W, the
> receiving end should be able to ask "I have a shallow history that
> cuts off at these commits. I want to get the history leading up to
> your tips, and also deepen the history further back from my current
> cut-off points by N commits", so that you would instead end up with
> something like this:
>
> (you)
> o---o---o---A---B---C---D---E---F---...---W---X---Y---Z
>
> That is, truly "deepen my history by 3". We could call that "git
> fetch --deepen=3" or something.
I take that back. If you start from
> (upstream)
> ---o---o---o---A---B
>
> (you)
> A---B
and you are interested in peeking the history a bit deeper, you
should be able to ask "I have a shallow history that cuts off at
these commits. I want my history deepened by N commits. I do not
care where your current tips are, by the way." with
git fetch --deepen=3
and end up with
> (you)
> o---o---o---A---B
without getting the new history leading to the updated tip at the
upstream. If you want the new history leading to the updated tip,
you can just say:
git fetch
without any --depth nor --deepen option to end up with:
> (you)
> A---B---C---D---E---F---...---W---X---Y---Z
instead.
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