23 lines
689 B
Python
23 lines
689 B
Python
import argparse
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import re
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VALID_HOSTNAME = re.compile(r"^[a-z0-9]([-a-z0-9]*[a-z0-9])?$", re.IGNORECASE)
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def validate_hostname(hostname: str) -> bool:
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if len(hostname) > 63:
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return False
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return VALID_HOSTNAME.match(hostname) is not None
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def machine_name_type(arg_value: str) -> str:
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if len(arg_value) > 63:
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raise argparse.ArgumentTypeError(
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"Machine name must be less than 63 characters long"
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)
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if not VALID_HOSTNAME.match(arg_value):
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raise argparse.ArgumentTypeError(
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"Invalid character in machine name. Allowed characters are a-z, 0-9, ., -, and _. Must not start with a number"
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)
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return arg_value
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