From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: git-ls-files --added?
Date: Sun, 24 May 2009 23:33:16 -0700
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In-Reply-To: <7vmy921i3j.fsf@alter.siamese.dyndns.org> (Junio C. Hamano's message of "Sun\, 24 May 2009 11\:17\:04 -0700")
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Junio C Hamano <gitster@pobox.com> writes:

> Jon Seymour <jon.seymour@gmail.com> writes:
> ...
>> I am still interested in the rationale for git-ls-files not supporting
>> such an option directly, since git-diff still seems a little indirect.
> 
> Partly historical, but more fundamental reason is because ls-files
> plumbing is about the index.
> ...
> Added is _not_ about comparision between the index and the work tree.  It
> is between the HEAD commit and the index, and it does not belong to
> ls-files plumbing.

Having said all that, I think you might be interested in pursuing

  http://thread.gmane.org/gmane.comp.version-control.git/97830/focus=99134

Also, the following thread may serve as a food for thought; it shows that
there is real need for some concise, easy to parse output for people who
want their own Porcelain.

  http://thread.gmane.org/gmane.comp.version-control.git/106122/focus=108110

In short, ls-files and diff-index _can_ give you what you want, but often
people would want information from both, consolidated.