From: Francis Moreau <francis.moro@gmail.com>
Date: Tue, 14 Jun 2011 15:56:43 GMT
Subject: Re: Is current HEAD pointing at a given revision ?
Message-ID: <BANLkTimMkOS_Q9gb_ta2P3NSMGyNJtKgJA@mail.gmail.com>
In-Reply-To: <m3mxhkvlcw.fsf@localhost.localdomain>

On Tue, Jun 14, 2011 at 11:00 AM, Jakub Narebski <jnareb@gmail.com> wrote:
> Francis Moreau <francis.moro@gmail.com> writes:
>
>> I have a given revision (tag, sha1 ...) and I'd like to know if that
>> revisions corresponds to what the current HEAD is pointing at.
>>
>> Could anybody give me some advices for achieving this ?
>
> If you want to know if given revision (or ref) points at the same
> thing as HEAD, you can use
>
>  [ "$(git rev-parse HEAD)" = "$(git rev-parse $ref^{commit})" ]
>
> or something like that.  The '^{commit}' is here in case $ref points
> only indirectly to commit, via a tag object.
>

I see thanks.

I'm not sure what the ^{commit} is for because in the case of tag
object, git-rev-parse seems to work fine without the suffix:

git rev-parse v2.6.39
8b0753a3df28c21b0570fa21362c5f1b3b4f59bf

This is in a kernel git repository

Thanks
-- 
Francis