Re: [PATCH] Add new @ shortcut for HEAD

From: Duy Nguyen <pclouds@gmail.com>
Date: Apr 30, 2013, 10:12 UTC
Message-ID: <CACsJy8ATWBuvqmjon7-s9KfPcWGHPUFbd6gHR2CqaOwHAgWZrg@mail.gmail.com>
In-Reply-To: <517F6E40.1040606@alum.mit.edu>

On Tue, Apr 30, 2013 at 2:09 PM, Michael Haggerty <mhagger@alum.mit.edu> wrote:

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> According to git-check-ref-format(1), an "@" character is currently
> legal in a reference name as long as it is not followed by "{".  As an
> example, git-svn uses "@" in reference names (e.g.,
> "refs/remotes/svn/tags/foo@56945"), I believe when a Subversion branch
> or tag is deleted then re-created.

Thanks! I was looking for this document but couldn't remember its name.

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> Amusingly, it is already possible to define a reference or symbolic
> reference named "@".  So all that you need to do is type
>
>     git symbolic-ref -m "Create @ alias for HEAD" @ HEAD
>
> to get the shortcut that you want :-)

Not so amusingly (and off topic), why reading the code this patch touches, I think if we have a ref whose last component is exactly 40 chars and contains only [0-9a-fA-F], then we simply consider it sha-1 and return without reading the ref. -- Duy