On Wed, May 01, 2024 at 10:22:28PM +0200, Karthik Nayak wrote:
> From: Karthik Nayak <karthik.188@gmail.com>
> 
> The `refs_create_symref()` function is used to update/create a symref.
> But it doesn't check the old target of the symref, if existing. It force
> updates the symref. In this regard, the name `refs_create_symref()` is a
> bit misleading. So let's rename it to `refs_update_symref()`. This is
> akin to how 'git-update-ref(1)' also allows us to create apart from
> update.

Arguably, as we are already updating all callsites anyway, I don't see a
reason why we shouldn't also update the function to accept the old OID
or old target so that callers can make raceless updates.

The only problem is that we don't have any users yet, and consequently
we have no way to verify that it works as intended. So maybe this is
better left for a future patch series, unless we have places where we
can reasonably update the callers to pass in the old value, as well.

Patrick