On Tue, Jun 14, 2011 at 6:17 PM, Jakub Narebski <jnareb@xxxxxxxxx> wrote:
> Francis Moreau wrote:
>> On Tue, Jun 14, 2011 at 11:00 AM, Jakub Narebski <jnareb@xxxxxxxxx> wrote:
>> > Francis Moreau <francis.moro@xxxxxxxxx> 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
>
> But that is the SHA-1 id of a _tag object_, not of commit (revision)
> it points to. '^{}' means peel to not tag, '^{commit}' means peel to
> commit.
>
Oh I see now, thanks a lot !
--
Francis
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