Re: diff against a tag ?

From: Linus Torvalds <torvalds@osdl.org>
Date: Apr 28, 2005, 21:01 UTC
Message-ID: <Pine.LNX.4.58.0504281358060.18901@ppc970.osdl.org>
In-Reply-To: <7vpswe7hvj.fsf@assigned-by-dhcp.cox.net>

On Thu, 28 Apr 2005, Junio C Hamano wrote:

> 
> Depends on your definition of today, but with the patch below I
> sent today, you can say "diff-tree -p $tag $(cat .git/HEAD)".

I think Dave was wondering how to _find_ the tag in the first place, which is a different issue.

Right now fsck is the only thing that reports tags that aren't referenced some other way. Once you know the tag, things are easy - even without Junio's patch you can just do

	object=$(cat-file tag $tag | sed 's/object //;q')

and then you can just do

	diff-tree $object $(cat .git/HEAD)

or whatever you want to do.

Dave: do a "fsck --tags" in your tree, and it will talk about the tags it
finds. Then you can create files like .git/refs/tags/v2.6.12-rc2 that
contain pointers to those tags..

		Linus