repo-add: do not recreate the database if nothing was changed
Signed-off-by: Ivan Shapovalov <intelfx@intelfx.name>
Signed-off-by: Allan McRae <allan@archlinux.org>
repo-add: clarify exit messages
Clarify if repo-add does not create a new database due to failures
or due to there being nothing to do.
Signed-off-by: Allan McRae <allan@archlinux.org>