From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lea Wiemann <lewiemann@gmail.com>
Subject: Re: Adding a 'version' command to the server
Date: Sat, 28 Jun 2008 14:25:20 +0200
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References: <7viqvupm3l.fsf@gitster.siamese.dyndns.org> <486572BC.9070201@gmail.com> <20080628114337.GA3489@steel.home>
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Cc: Junio C Hamano <gitster@pobox.com>, git@vger.kernel.org
To: Alex Riesen <raa.lkml@gmail.com>
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Alex Riesen wrote:
> And exactly how are the incompatibility problems avoided? By denying
> the service if the versions don't match?

No, by talking to older servers in a way they understand it.  So for 
instance it would call "git-upload-pack" instead of "git upload-pack".

(See also the SSH protocol with two versions, and I think Subversion's 
svnserve also somehow identifies its own capabilities and/or version.)

-- Lea