def add_cli_options(parser, cfgfile=None, datadir=None):
"""Add common CLI options to the given arg parser."""
from . import config
config.add_cli_options(parser, cfgfile)
datadirhelp = "The directory in which to store data files."
if datadir:
datadirhelp += " (default: {!r})".format(datadir)
parser.add_option("-d", "--data-path", metavar="PATH", default=datadir,
help=datadirhelp)