From: Jeff King <peff@peff.net>
Date: Tue, 19 Jul 2011 20:14:00 GMT
Subject: Re: [PATCH 1/2] diff-lib: simplify do_diff_cache()
Message-ID: <20110719201400.GA2938@sigill.intra.peff.net>
In-Reply-To: <1311099186-16482-2-git-send-email-gitster@pobox.com>

On Tue, Jul 19, 2011 at 11:13:05AM -0700, Junio C Hamano wrote:

> Since 34110cd (Make 'unpack_trees()' have a separate source and
> destination index, 2008-03-06), we can run unpack_trees() without munging
> the index at all, but do_diff_cache() tried ever so carefully to work
> around the old behaviour of the function.
> 
> We can just tell unpack_trees() not to touch the original index and there
> is no need to clean-up whatever the previous round has done.

Can we drop the calls to discard_cache in reset.c now?

$ git grep -B1 discard_cache builtin/reset.c
builtin/reset.c-        /* do_diff_cache() mangled the index */
builtin/reset.c:        discard_cache();
--
builtin/reset.c-                /* The index is still clobbered from do_diff_cache() */
builtin/reset.c:                discard_cache();

-Peff