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"""Checks if the version is acceptable, as per this project's release process.
"""
import sys
from datetime import datetime
from typing import Optional
from packaging.version import InvalidVersion, Version
def is_this_a_good_version_number(string: str) -> Optional[str]:
try:
v = Version(string)
except InvalidVersion as e:
return str(e)
if v.local:
return "Nope. PyPI refuses local release versions."
if v.dev:
return "No development releases on PyPI. What are you even thinking?"
if v.pre and v.pre[0] != "b":
return "Only beta releases are allowed. No alphas."
release = v.release
expected_major = datetime.now().year % 100
if len(release) not in [2, 3]:
return "Not of the form: {0}.N or {0}.N.P".format(expected_major)
return None
def main() -> None:
problem = is_this_a_good_version_number(sys.argv[1])
if problem is not None:
print("ERROR:", problem)
sys.exit(1)
if __name__ == "__main__":
main()
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