git-diff/git-diff-files: Turn off copy-detection?

From: Marius Storm-Olsen <mstormo@gmail.com>
Date: Sep 29, 2009, 12:50 UTC
Message-ID: <4AC20286.6020108@gmail.com>

Hi,

I'm trying to diff the header files between two version of a repo, to do an ABI review, but get too many diffs from 'similar copy', which makes the review hard. These are generally unrelated files, but due to large copyright header, and spaces, the actual changes are not large enough to be detected as new files. I'd therefore like to turn off copy detection completely, or at least set some kind of threshold before a file is considered a copy in the diff.

Doing a 'git diff origin/4.5..origin/4.6 -- src/corelib' gives me this excerpt:

diff --git origin/4.5/src/corelib/tools/qtimeline.h 
origin/4.6/src/corelib/animation/qabstractanimation.h
similarity index 58%
...
diff --git origin/4.5/src/corelib/kernel/qsystemsemaphore.h 
origin/4.6/src/corelib/animation/qanimationgroup.h
similarity index 63%
...
diff --git origin/4.5/src/corelib/kernel/qsystemsemaphore.h 
origin/4.6/src/corelib/animation/qparallelanimationgroup.h
similarity index 63%
...
diff --git origin/4.5/src/corelib/io/qresource_iterator_p.h 
origin/4.6/src/corelib/animation/qpauseanimation.h
similarity index 68%
...
diff --git origin/4.5/src/corelib/kernel/qsystemsemaphore.h 
origin/4.6/src/corelib/animation/qpropertyanimation.h
similarity index 60%
...
diff --git origin/4.5/src/corelib/kernel/qsystemsemaphore.h 
origin/4.6/src/corelib/animation/qsequentialanimationgroup.h
similarity index 55%
...
diff --git origin/4.5/src/corelib/animation/qvariantanimation.h 
origin/4.6/src/corelib/animation/qvariantanimation.h
new file mode 100644
...
diff --git origin/4.5/src/corelib/arch/qatomic_arch.h 
origin/4.6/src/corelib/arch/qatomic_arch.h
index 52ab101..548a5e9 100644

So, not even related. They should really had shown up as new files, 
IMO. (I guess git stores the creation of the file as a delta of the 
indicated 'copy', but in this case I don't care about that :)

Thanks!

--
.marius