From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <junkio@cox.net>
Subject: Re: Question about possible git races
Date: Wed, 22 Mar 2006 17:46:48 -0800
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To: Radoslaw Szkodzinski <astralstorm@o2.pl>
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Radoslaw Szkodzinski <astralstorm@o2.pl> writes:

> For me fetch = git-*-fetch. Which in turn calls git-receive-pack.

Does anything other than git-send-pack call git-receive-pack?

For fetch, git-fetch-pack is called from the core level, but it
does not update refs itself.  It writes out enough information
to its standard output so that the script calling it can update
the refs.  So at the core level there cannot be any race, but
that does not necessarily mean existing scripts are race free.

Our barebone Porcelainish scripts _do_ use update-ref to do the
same lock - re-read - rename-to-update cycle when updating the
refs using that information, but that is something you
explicitly said you are not interested in ;-).