From: Junio C Hamano <gitster@pobox.com>
Date: Mon, 16 Jun 2008 21:45:59 GMT
Subject: Re: using git-blame with patches as input
Message-ID: <7vej6x9hpk.fsf@gitster.siamese.dyndns.org>
In-Reply-To: <20080616213517.GE20727@redhat.com>

Don Zickus <dzickus@redhat.com> writes:

> I deal with a lot of backported patches that are a combination of multiple
> commits.  I was looking to develop a tool that would help me determine
> which chunks of the patch are upstream (not necessarily currently in HEAD
> but at some point in the file's history).
>
> For example, if I took the top three commits from HEAD and appended them
> into one patch file and then ran this tool with the patch as input, I
> would hope that it gave as output the three original commits.

A quick and dirty hack would be to:

	rm .git/index
	sed -ne 's/^[+ ]//p' -e '/^@@/p' patches... >file
        git add file
        git commit -m 'only "a file" remains'
        git blame -C -C -w file

which would try blaming all the postimage concatenated together ;-)