From: Linus Torvalds <torvalds@osdl.org>
Date: Thu, 28 Apr 2005 21:32:34 GMT
Subject: Re: Finding file revisions
Message-ID: <Pine.LNX.4.58.0504281428300.18901@ppc970.osdl.org>
In-Reply-To: <200504281658.39300.mason@suse.com>



On Thu, 28 Apr 2005, Chris Mason wrote:

> On Thursday 28 April 2005 15:11, Kay Sievers wrote:
> >
> > Can you confirm this with the kernel tree?
> >   file-changes -c 9acf6597c533f3d5c991f730c6a1be296679018e drivers/usb/core/usb.c
> >
> > lists the commit:
> >   diff-tree -r 1d66c64c3cee10a465cd3f8bd9191bbeb718f650 c79bea07ec4d3ef087962699fe8b2f6dc5ca7754
> > f0534ee064901d0108eb7b2b1fcb59a98bb53c2b->c231b4bef314284a168fedb6c5f6c47aec5084fc drivers/usb/core/usb.c
> >
> >  cat-file commit c79bea07ec4d3ef087962699fe8b2f6dc5ca7754
> >
> > which seems not to have changed the file asked for.
> 
> Hmmm, that does work here:
> 
> coffee:/src/git # diff-tree -r 1d66c64c3cee10a465cd3f8bd9191bbeb718f650 c79bea07ec4d3ef087962699fe8b2f6dc5ca7754 | grep usb.core.usb.c
> *100644->100644 blob    f0534ee064901d0108eb7b2b1fcb59a98bb53c2b->c231b4bef314284a168fedb6c5f6c47aec5084fc      drivers/usb/core/usb.c

I think Key is confused by the fact that the commit is a -merge- commit, 
and the first parent has _not_ changed that file - it got changed through 
the merge.

Ie:

	cat-file commit c79bea07ec4d3ef087962699fe8b2f6dc5ca7754

gives

	tree 3fbdc4745cfde60df7d05815b343e4a253020530
	parent a9e4820c4c170b3df0d2185f7b4130b0b2daed2c
	parent 1d66c64c3cee10a465cd3f8bd9191bbeb718f650
	author Linus Torvalds <torvalds@ppc970.osdl.org.(none)> 1113921100 -0700
	committer Linus Torvalds <torvalds@ppc970.osdl.org.(none)> 1113921100 -0700

	Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/i2c-2.6.git/

and if you do a diff against the _first_ parent you don't see anything 
changing in USB..

		Linus