Re: [PATCH 0/2] Documentation updates for SHA-256

From: Junio C Hamano <gitster@pobox.com>
Date: Aug 14, 2020, 20:25 UTC
Message-ID: <xmqqtux5ug9t.fsf@gitster.c.googlers.com>
In-Reply-To: <20200814202031.GM8085@camp.crustytoothpaste.net>

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

Show 12 quoted lines

> On 2020-08-14 at 04:47:19, Junio C Hamano wrote:
>> Derrick Stolee <stolee@gmail.com> writes:
>> 
>> > Is that really a concern? Maybe, but also Git will never move data like
>> > that.
>> 
>> I would say that we can safely say that this year ;-) as dumb HTTP
>> would be mostly dead.
>
> We do fetch the refs first for dumb HTTP so last I checked, we correctly
> detected this case and failed.  I'd personally be happy to let the
> DAV-based protocol die, but there are folks who like it.

I didn't mean DAV.

The oldest dumb HTTP code grabs all packfiles listed in objects/info/packs and there is nothing to prevent folks from running the current client to fetch from SHA-256 repository into a SHA-1 repository. The resulting packfiles that do not identify with the version number what hash it uses would be very hard to use.