Re: [BUG] branch renamed to 'HEAD'

> On Mon, Feb 27, 2017 at 04:33:36PM -0800, Junio C Hamano wrote:
>
>> A flag to affect the behaviour (as opposed to &flag as a secondary
>> return value, like Peff's patch does) can be made to work.  Perhaps
>> a flag that says "keep the input as is if the result is not a local
>> branch name" would pass an input "@" intact and that may be
>> sufficient to allow "git branch -m @" to rename the current branch
>> to "@" (I do not think it is a sensible rename, though ;-).  But
>> probably some callers need to keep the original input and compare
>> with the result to see if we expanded anything if we go that route.
>> At that point, I am not sure if there are much differences in the
>> ease of use between the two approaches.
>
> I just went into more detail in my reply to Jacob, but I do think this
> is a workable approach (and fortunately we seem to have banned bare "@"
> as a name, along with anything containing "@{}", so I think we would end
> up rejecting these nonsense names).
>
> I'll see if I can work up a patch. We'll still need to pass the flag
> around through the various functions, but at least it will be a flag and
> not a confusing negated out-parameter.
>
> -Peff