Re: [PATCH] t6300: avoid creating refs/heads/HEAD

[Junio C Hamano <gitster@pobox.com>]

Jeff King <peff@peff.net> writes:

> I suspect there are a lot of other places that are less clear cut. E.g.,
> I think just:
>
>   git branch foo bar
>
> will put "foo" through the same interpretation. So you could do:
>
>   git branch -f @{-1} bar
>
> Is that insane? Maybe. But it does work now.

No, it _is_ very sensible, so is "git checkout -B @{-1} <someplace>"

Perhaps interpret-branch-name that does not error out when given "@"
is what is broken?  I suspect that calling interpret_empty_at() from
that function is fundamentally flawed.  The "@" end user types never
means refs/heads/HEAD, and HEAD@{either reflog or -1} would not mean
anything that should be taken as a branch_name, either.  

So perhaps what interpret_empty_at() does is necessary for the "four
capital letters is too many to type, so just type one key while
holding a shift", but it should be called from somewhere else, and
not from interpret_branch_name()?