gistfile1.py

def parse_args():
    ''' None -> None
    Parse command line arguments and configuration
    file values
    '''

    conf_dir = os.path.expanduser('~/.dockerreg')
    user_conf_file = os.path.join(conf_dir, 'config')

    config = SafeConfigParser()
    config.read(user_conf_file)
    
    options_table = [
        Option('-s','--server', action='store',
               help='connect to this server',
               default=config.get('registry','server')),
        Option('-p','--port', action='store',
               help='connect to this port',
               default=config.get('registry','port')),
        Option('-l','--list-repos', action='store',
               help='list all repos'),
        Option('-r','--repo', action='store',
               help='repository'),
        Option('--tags', action='store',
               help='list tags, requires -r')
        ]

    usage = 'usage: %prog [options] [command]'
    
    parser = OptionParser(option_list=options_table, usage=usage)
    (options, args) = parser.parse_args()

    if not options.server:
        print "try: " + sys.argv[0] + " --help"
        sys.exit(2)
        
    if not options.port:
        print "try: "+sys.argv[0]+" --help"
        sys.exit(2)
            
    return options