From: Alex Riesen <fork0@users.sourceforge.net>
Date: Wed, 26 Oct 2005 20:47:27 GMT
Subject: Re: [PATCH 1/4] git-init-db should error out with a message
Message-ID: <20051026204727.GA19846@steel.home>
In-Reply-To: <7v3bmoc9d7.fsf@assigned-by-dhcp.cox.net>

Junio C Hamano, Wed, Oct 26, 2005 22:27:00 +0200:
> > Not just that. It would be interesting to give the user an option to
> > use the file references ("ref: refs/heads/master").
> 
> Actually, the users should not have to care how HEAD reference
> is implemented.  It might make sense to use regular file symref
> regardless of platforms (i.e. never define USE_SYMLINK_HEAD on
> any platform).

This my idea too. All the time I was doing that patch :)

> HOWEVER, I think "falling back" (both in Johannes' patch which
> is in the "master" branch, and your version) has a funny failure
> mode.  What happens when two processes try redirecting .git/HEAD
> simultaneously, possibly to different branch heads?  Both of
> them unlink(), one successfully does symlink(), and the other
> gets EEXIST and falls back to create regular file symref.

I think the file ref version uses rename of HEAD.lock into HEAD, doesn't it?
Rename(2) should just remove the symlink, right?