From: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Date: Thu, 28 Aug 2008 13:02:12 +0000 (+0700)
Subject: diff*: fix worktree setup
X-Git-Tag: v1.6.0.2~22^2~4
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/4f38f6b5bafb1f7f85c7b54d0bb0a0e977cd947c?ds=inline;hp=4f38f6b5bafb1f7f85c7b54d0bb0a0e977cd947c

diff*: fix worktree setup

This fixes "git diff", "git diff-files" and "git diff-index" to work
correctly under worktree setup. Because diff* family works in many modes
and not all of them require worktree, Junio made a nice summary
(with a little modification from me):

* diff-files is about comparing with work tree, so it obviously needs a
work tree;

* diff-index also does, except "diff-index --cached" or "diff --cached TREE"

* no-index is about random files outside git context, so it obviously
doesn't need any work tree;

* comparing two (or more) trees doesn't;

* comparing two blobs doesn't;

* comparing a blob with a random file doesn't;

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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