Re: A few usability question about git diff --cached

"J. Bruce Fields" [off-list ref] writes:

Yes, the index differs from the work tree or HEAD temporarily, 

Temporarily, yes, but the _point_ of having it is to have it differ
from HEAD (otherwise, you can't create a new revision), and from the
tree (otherwise, index-related commands are useless).

The stat-information, and sha1sum are actually a cache, but they don't
have to be user-visible, except for speed. "diff --cached" has nothing
to do with the stat information for the user.

-- 
Matthieu