From: Junio C Hamano <junkio@cox.net>
Date: Wed, 14 Sep 2005 18:09:32 GMT
Subject: Re: git-diff-tree rename detection bug
Message-ID: <7vwtljjzc3.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <59a6e583050914094777c4fe96@mail.gmail.com>

Wayne Scott <wsc9tt@gmail.com> writes:

> Look at the diffs between ad6571a78ac74e9fa27e581834709067dba459af and
> it's parent with and without rename detection enabled.  (In linux-2.6
> git tree)

> Notice how the the fact that include/asm-ppc64/termios.h is
> deleted gets lost?  Looks broken to me.

I suspect that what is deleted is not asm-ppc64/termios.h but
asm-ppc/termios.h.  The below is an output without grep which
seems to confuse things.

$ git-diff-tree -r -M ad6571a78ac74e9fa27e581834709067dba459af |
  sed -ne 's/^.* \([AMCRDU]\)/\1/p'
R092    include/asm-ppc64/mman.h        include/asm-powerpc/mman.h
R097    include/asm-ppc64/termbits.h    include/asm-powerpc/termbits.h
R098    include/asm-ppc64/termios.h     include/asm-powerpc/termios.h
D       include/asm-ppc/mman.h
D       include/asm-ppc/termbits.h
D       include/asm-ppc/termios.h

$ git-diff-tree -r ad6571a78ac74e9fa27e581834709067dba459af |
  sed -ne 's/^.* \([AMCRDU]\)/\1/p'
A       include/asm-powerpc/mman.h
A       include/asm-powerpc/termbits.h
A       include/asm-powerpc/termios.h
D       include/asm-ppc/mman.h
D       include/asm-ppc/termbits.h
D       include/asm-ppc/termios.h
D       include/asm-ppc64/mman.h
D       include/asm-ppc64/termbits.h
D       include/asm-ppc64/termios.h

The first 3 A and last 3 D are accounted for in the -M output as
renames from asm-ppc64 to asm-powerpc.  Middle 3 D from asm-ppc
are shown in the -M output.  So I do not think we are losing
anything.  Am I missing something?