Re: [PATCH v4 1/5] refs: introduce `is_pseudoref()` and `is_headref()`

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

Patrick Steinhardt <ps@pks.im> writes:

> I wonder whether we can maybe consolidate the interface into one or
> maybe even two functions where the behaviour can be tweaked with a flag
> field. Something like `refname_is_valid()` with a bunch of flags:
>
>   - REFNAME_ACCEPT_HEAD to accept "HEAD"
>   - REFNAME_ACCEPT_PSEUDOREF to accept all of the refs ending with
>     "_HEAD" or being one of the irregular pseudorefs.
>   - REFNAME_ACCEPT_INVALID_BUT_SAFE to accept refnames which aren't
>     valid, but which would pass `refname_is_safe()`.

I am certain we _can_, but it will take an actual patch to see if
such a refactoring makes the callers easier to follow, which is the
real test.  FWIW, I am much less skeptical than hopeful in this
particular case.