From: Duy Nguyen <pclouds@gmail.com>
Date: Wed, 03 Dec 2014 12:50:31 GMT
Subject: Re: [PATCH 24/34] checkout: reject if the branch is already checked out elsewhere
Message-ID: <CACsJy8DLd4biEHo+FWYLqc4HKezHfv1ymWSQ8kLHLTQv=YKc3A@mail.gmail.com>
In-Reply-To: <xmqq4mtem029.fsf@gitster.dls.corp.google.com>

On Wed, Dec 3, 2014 at 12:30 AM, Junio C Hamano <gitster@pobox.com> wrote:
>> I do like "read-only" ref concept where we can keep ref name
>> (especially tags) in HEAD until the next commit. But it didn't go
>> anywhere
>
> Remind me.  That sounds somewhat interesting.

Couldn't find anything in my mail archive. But the idea is simple:

 - we delay detaching HEAD until we need to update the associated ref
at commit/reset time
 - currently refs/tags/* are read-only. we generalize it to allow this
'read-only' attribute on some refs/heads/* as well. Because we can't
really add attributes to refs, config var could be used.
-- 
Duy