From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH] Add --show-touched option to show "diff --git" line when contents are unchanged
Date: Fri, 03 Aug 2007 14:50:15 -0700
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Cc: Steven Grimm <koreth@midwinter.com>,
	Jean-Francois Veillette <jean_francois_veillette@yahoo.ca>,
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To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
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In-Reply-To: <vpqps24i9sx.fsf@bauges.imag.fr> (Matthieu Moy's message of "Fri,
	03 Aug 2007 23:32:14 +0200")
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Matthieu Moy <Matthieu.Moy@imag.fr> writes:

> Also, is there any particular reason not to update the index stat
> information when files are found to be identical?

Very much --- diff is a read-only operation.

"git-status $args" on the other hand is a preview of "what would
happen if I say 'git-commit $args'", and in order to compute
that, you would fundamentally need to be able to write into the
object store.  In a special case of giving empty $args it can be
read-only.  The commit Dscho quoted earlier was to hack that
around so that "git-status" can pretend to be a read-only
operation in a repository you do not have write permission to.