From: Junio C Hamano <gitster@pobox.com>
Date: Thu, 18 Apr 2013 16:39:23 GMT
Subject: Re: [PATCH] t3400 (rebase): add failing test for a peculiar rev spec
Message-ID: <7vmwsv94jo.fsf@alter.siamese.dyndns.org>
In-Reply-To: <1366275155-26244-1-git-send-email-artagnon@gmail.com>

Ramkumar Ramachandra <artagnon@gmail.com> writes:

> 'git rebase' does not recognize revisions specified as :/text.  This
> is because the attempts to rev-parse ${REV}^0, which fails in this
> case.  Add a test to document this failure.

>  - The failure occurs in git-rebase.sh:403.  Is it using the ^0 only
>    to make sure that the revision specified is a commit?  Surely,
>    there'a a better way to do this?
>
>  Can someone point me in the right direction?

How about ${REV}^0 into

	nREV=$(git rev-parse "${REV}")^0

and use it where you need an object name that needs to be parsed by
get_sha1(), e.g.
	
	git checkout -q "$nREV^0"

I would suggest a helper function in git-sh-setup, something like:

	peel_committish () {
		case "$1" in
                :/*)	
			peeltmp=$(git rev-parse --verify "$1") &&
                	git rev-parse --verify "$peeltmp^0"
                        ;;
		*)
			git rev-parse --verify "$1^0"
                        ;;
		esac
	}