From: Junio C Hamano <junkio@cox.net>
Date: Tue, 09 Jan 2007 07:07:36 GMT
Subject: Re: [PATCH] Detached HEAD (experimental)
Message-ID: <7v3b6ksmo7.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <20070109032640.GB1904@spearce.org>

"Shawn O. Pearce" <spearce@spearce.org> writes:

> The common case is probably going to be where the argument to
> `git checkout` is a fast-foward of the detached HEAD.  And that's
> pretty cheap to check.  So we perform that check, and if we fail
> that then we search through every ref to determine if the detached
> HEAD is fully contained in any of those.  Currently that would be
> pretty slow to do with the current tools, but a small modification
> of say git-merge-base (or git-describe) might make it cheap enough
> to run during this slightly less common case.

The needed change to merge-base is quite minimum.  Let me come
up with a patch...