From: Junio C Hamano <gitster@pobox.com>
Date: Tue, 02 Dec 2014 17:30:22 GMT
Subject: Re: [PATCH 24/34] checkout: reject if the branch is already checked out elsewhere
Message-ID: <xmqq4mtem029.fsf@gitster.dls.corp.google.com>
In-Reply-To: <CACsJy8DjbgNpbf9Z-OVCpv+YNmvsuHfcPW_Jfm3_gbq2VgYgkQ@mail.gmail.com>

Duy Nguyen <pclouds@gmail.com> writes:

> FWIW git-branch usually can show the original branch of detached head
> (must not always). I don't think we have a plumbing equivalent for it
> though. People can "tail -1 $GIT_DIR/logs/HEAD| sed .." but that seems
> hacky.

@{-1}, i.e. "the last branch I checked out"?

> 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.