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|
#!/usr/bin/python3
import argparse
import logging
import os
import string_utils
logger = logging.getLogger(__name__)
class ActionNoYes(argparse.Action):
def __init__(
self,
option_strings,
dest,
default=None,
required=False,
help=None
):
if default is None:
msg = 'You must provide a default with Yes/No action'
logger.critical(msg)
raise ValueError(msg)
if len(option_strings) != 1:
msg = 'Only single argument is allowed with YesNo action'
logger.critical(msg)
raise ValueError(msg)
opt = option_strings[0]
if not opt.startswith('--'):
msg = 'Yes/No arguments must be prefixed with --'
logger.critical(msg)
raise ValueError(msg)
opt = opt[2:]
opts = ['--' + opt, '--no_' + opt]
super().__init__(
opts,
dest,
nargs=0,
const=None,
default=default,
required=required,
help=help
)
def __call__(self, parser, namespace, values, option_strings=None):
if (
option_strings.startswith('--no-') or
option_strings.startswith('--no_')
):
setattr(namespace, self.dest, False)
else:
setattr(namespace, self.dest, True)
def valid_bool(v):
if isinstance(v, bool):
return v
return string_utils.to_bool(v)
def valid_ip(ip: str) -> str:
s = string_utils.extract_ip_v4(ip.strip())
if s is not None:
return s
msg = f"{ip} is an invalid IP address"
logger.warning(msg)
raise argparse.ArgumentTypeError(msg)
def valid_mac(mac: str) -> str:
s = string_utils.extract_mac_address(mac)
if s is not None:
return s
msg = f"{mac} is an invalid MAC address"
logger.warning(msg)
raise argparse.ArgumentTypeError(msg)
def valid_percentage(num: str) -> float:
n = float(num)
if 0.0 <= n <= 100.0:
return n
msg = f"{num} is an invalid percentage; expected 0 <= n <= 100.0"
logger.warning(msg)
raise argparse.ArgumentTypeError(msg)
def valid_filename(filename: str) -> str:
s = filename.strip()
if os.path.exists(s):
return s
msg = f"{filename} was not found and is therefore invalid."
logger.warning(msg)
raise argparse.ArgumentTypeError(msg)
|
