Duy Nguyen <pclo...@gmail.com> writes:
> On Wed, Jan 9, 2013 at 9:53 AM, Junio C Hamano <gits...@pobox.com> wrote:
>> * We would like to update "clone --depth=1" to end up with a tip
>> only repository, but let's not to touch "git fetch" (and "git
>> clone") and make them send 0 over the wire when the command line
>> tells them to use "--depth=1" (i.e. let's not do the "off-by-one"
> You can't anyway. Depth 0 on the wire is considered invalid by upload-pack.
Yes, that is a good point that we say "if (0 < opt->depth) do the
shallow thing" everywhere, so 0 is spcial in that sense.
Which suggests that if we wanted to, we could update the fetch side
to do the off-by-one thing against the current upload-pack when the
given depth is two or more, and still send 1 when depth=1. When
talking with an updated upload-pack that advertises exact-shallow
protocol extension, it can disable that off-by-one for all values of
depth. That way, the updated client gets history of wrong depth
only for --depth=1 when talking with the current upload-pack; all
other cases, it will get history of correct depth.
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