From: Junio C Hamano <gitster@pobox.com>
Date: Wed, 27 Jun 2007 10:09:58 GMT
Subject: Re: post-update script to update wc - version 2
Message-ID: <7vved9pv2h.fsf@assigned-by-dhcp.pobox.com>
In-Reply-To: <81b0412b0706270221y40bac0a7gf6b73eda9f1e4bb0@mail.gmail.com>

"Alex Riesen" <raa.lkml@gmail.com> writes:

> On 6/27/07, Sam Vilain <sam@vilain.net> wrote:
>> Sam Vilain wrote:
>> >         this_tree=`git-cat-file commit $commit | awk '/^tree/ { print $2; exit }'`
>>
>> Of course on newer git, `git-rev-parse $commit:` will do that.
>
> Are you sure? Maybe you mean git-rev-parse "$commit"^{tree}?

I had the same "Huh?"  moment as you had, but what Sam said is
correct.  He is being too clever to confuse us ;-).

When "$commit" is a tree-ish,

	$commit:$path

is the name of the tree or blob object at that $path, and as 
very strange special case, an empty $path is the whole tree.

It's been this way since early this year (before v1.5.0-rc1),
thanks to Jeff King.