From: Junio C Hamano <gitster@pobox.com>
Date: Fri, 14 Aug 2020 20:22:29 GMT
Subject: Re: [PATCH 2/3] commit-graph: use the hash version byte
Message-ID: <xmqqy2mhuge2.fsf@gitster.c.googlers.com>
In-Reply-To: <20200814201153.GK8085@camp.crustytoothpaste.net>

"brian m. carlson" <sandals@crustytoothpaste.net> writes:

> Can we maybe say something like this?
>
>   switch (hash_algo_by_ptr(the_hash_algo)) {
>     case GIT_HASH_SHA1:
>       return 1;
>     case GIT_HASH_SHA256:
>       return 2;
>     default:
>       die(_("invalid hash version"));
>   }
>
> That way if SHA-256 gets broken and we switch to another 256-bit hash
> (SHA-3-256?), we'll be forced to update this properly.

Excellent.