register_cli_opts() does not work after register_opts()

[Baohua Yang]

The following code will not register the common_opts as cli options, unless we put register_cli_opts() ahead of register_opts()

==================
import sys
from oslo.config import cfg

if __name__ == "__main__":
    common_opts = [ cfg.StrOpt('bind_host', default='0.0.0.0', help='IP address to listen on'), cfg.IntOpt('bind_port', default=9292, help='Port number to listen on') ]

    CONF = cfg.CONF
    CONF.register_opts(common_opts)
    CONF.register_cli_opts(common_opts)

    CONF(args=sys.argv[1:])
===================

I think the usage order should not affect the registration.

[Doug Hellmann (doug-hellmann)]

I'm not sure this is really a bug. Command line options must all be registered before the command line arguments are parsed. File-only options can be registered at any point while the program is running.

[Baohua Yang (yangbaohua)]

To Doug Hellmann (doug-hellmann):
    Thanks for the comments, doug!
    Yes, the file-only options can be registered at any point. However, if it's registered before the cmd options, it will disable the following cmd option registration. This is inconvenient and not necessary to have the limit.
    So I suggest we trace the option owner and register correctly based on their categories.
    Thanks!

[Ben Nemec (bnemec)]

Why was oslo-incubator added to this bug? It doesn't exist anymore, and I don't believe any of the relevant code here ever lived in incubator anyway.

[Baohua Yang (yangbaohua)]

invalid after lots of change.