From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: Combined diff with name-only option
Date: Fri, 10 Jul 2015 10:47:46 -0700
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Janusz Bia=C5=82obrzewski  <Janusz.Bialobrzewski@biu.pl> writes:

> Is it a bug or is it done by design?

I suspect the answer is "no and not really".  The truth would be
closer to: we didn't bother to write code in the command line parser
to check and flag it as an error when "--cc" and "--name-only" is
given together.

Unlike "-c" that works solely on the tree level changes, "--cc"
looks into blob contents involved in the merge, but things like
"--name-status", etc., do not work at blob levels (you can consider
that part is "by design").

Similarly, if you make a whitespace-only change to a file and use

    git diff-tree -b -p

you will still see the name of the commit object, but no patch.

    git diff-tree -b --name-only

still reports the modified paths as tree-level differences.