Re: [PATCH 1/5] http-protocol.txt: document SHA-256 "want"/"have" format

Junio C Hamano [off-list ref] writes:

"brian m. carlson" [off-list ref] writes:

quoted

On 2020-08-14 at 17:28:27, Junio C Hamano wrote:

quoted

Martin Ågren [off-list ref] writes:

quoted

Document that in SHA-1 repositories, we use SHA-1 for "want"s and
"have"s, and in SHA-256 repositories, we use SHA-256.

Ehh, doesn't this directly contradict the transition plan of "on the
wire everything will use SHA-1 version for now?"

SHA-256 repositories interoperate currently using SHA-256 object IDs.
It was originally intended that we wouldn't update the protocol, but
that leads to much of the testsuite failing since it's impossible to
move objects from one place to another.

If we wanted to be more pedantically correct and optimize for the
future, we could say that the values use the format negotiated by the
"object-format" protocol extension and SHA-1 otherwise.

Yes, that's wonderful.  I was confused when I said about the
evolution path.  We still would want to eventually do the on-the-fly
migration over the wire to make SHA-1 and SHA-256 repositories
interoperate, but at least we already can allow SHA-256 repositories
safely attempt to talk to SHA-1 repositories and gracefully fail.

Thanks.