tree 9f67675b9d77ce9ec6cf4003b8b57181915d86de
parent 7bbc4e8fdb33e0a8e42e77cc05460d4c4f615f4d
author Jeff King <peff@peff.net> 1400568560 -0400
committer Junio C Hamano <gitster@pobox.com> 1400609343 -0700

move "--follow needs one pathspec" rule to diff_setup_done

Because of the way "--follow" is implemented, we must have
exactly one pathspec. "git log" enforces this restriction,
but other users of the revision traversal code do not. For
example, "git format-patch --follow" will segfault during
try_to_follow_renames, as we have no pathspecs at all.

We can push this check down into diff_setup_done, which is
probably a better place anyway. It is the diff code that
introduces this restriction, so other parts of the code
should not need to care themselves.

Reported-by: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>