def main()

in schemes.py [0:0]

• 46 lines of code
• 10 McCabe index (conditional complexity)

def main(args=None):
    global orig_attrs
    if not args:
        parser = argparse.ArgumentParser()
        set_argparser(parser)
        args = parser.parse_args()

    _damon.chk_permission()
    _damon.chk_update_debugfs(args.debugfs)
    scheme_version = 0
    if _damon.feature_supported('schemes_speed_limit'):
        scheme_version = 1
    if _damon.feature_supported('schemes_prioritization'):
        scheme_version = 2
    if _damon.feature_supported('schemes_wmarks'):
        scheme_version = 3
    if _damon.feature_supported('schemes_quotas'):
        scheme_version = 4

    signal.signal(signal.SIGINT, sighandler)
    signal.signal(signal.SIGTERM, sighandler)
    orig_attrs = _damon.current_attrs()

    args.rbuf = 0
    args.out = 'null'
    args.schemes = _convert_damos.convert(args.schemes, args.sample, args.aggr,
            scheme_version)
    new_attrs = _damon.cmd_args_to_attrs(args)
    init_regions = _damon.cmd_args_to_init_regions(args)
    numa_node = args.numa_node
    target = args.target

    target_fields = target.split()
    if target == 'paddr':   # physical memory address space
        if not init_regions:
            if numa_node:
                init_regions = _paddr_layout.paddr_region_of(numa_node)
            else:
                init_regions = [_paddr_layout.default_paddr_region()]
        run_damon(target, False, init_regions, new_attrs, orig_attrs)
    elif not subprocess.call('which %s &> /dev/null' % target_fields[0],
            shell=True, executable='/bin/bash'):
        run_damon(target, True, init_regions, new_attrs, orig_attrs)
    else:
        try:
            pid = int(target)
        except:
            print('target \'%s\' is neither a command, nor a pid' % target)
            exit(1)
        run_damon(target, False, init_regions, new_attrs, orig_attrs)