forked from varia/varia.website
58 lines
2.1 KiB
Python
58 lines
2.1 KiB
Python
|
import functools
|
||
|
|
import logging
|
||
|
|
import re
|
||
|
|
from typing import NewType, Optional, Tuple, cast
|
||
|
|
|
||
|
|
from pip._vendor.packaging import specifiers, version
|
||
|
|
from pip._vendor.packaging.requirements import Requirement
|
||
|
|
|
||
|
|
NormalizedExtra = NewType("NormalizedExtra", str)
|
||
|
|
|
||
|
|
logger = logging.getLogger(__name__)
|
||
|
|
|
||
|
|
|
||
|
|
def check_requires_python(
|
||
|
|
requires_python: Optional[str], version_info: Tuple[int, ...]
|
||
|
|
) -> bool:
|
||
|
|
"""
|
||
|
|
Check if the given Python version matches a "Requires-Python" specifier.
|
||
|
|
|
||
|
|
:param version_info: A 3-tuple of ints representing a Python
|
||
|
|
major-minor-micro version to check (e.g. `sys.version_info[:3]`).
|
||
|
|
|
||
|
|
:return: `True` if the given Python version satisfies the requirement.
|
||
|
|
Otherwise, return `False`.
|
||
|
|
|
||
|
|
:raises InvalidSpecifier: If `requires_python` has an invalid format.
|
||
|
|
"""
|
||
|
|
if requires_python is None:
|
||
|
|
# The package provides no information
|
||
|
|
return True
|
||
|
|
requires_python_specifier = specifiers.SpecifierSet(requires_python)
|
||
|
|
|
||
|
|
python_version = version.parse(".".join(map(str, version_info)))
|
||
|
|
return python_version in requires_python_specifier
|
||
|
|
|
||
|
|
|
||
|
|
@functools.lru_cache(maxsize=512)
|
||
|
|
def get_requirement(req_string: str) -> Requirement:
|
||
|
|
"""Construct a packaging.Requirement object with caching"""
|
||
|
|
# Parsing requirement strings is expensive, and is also expected to happen
|
||
|
|
# with a low diversity of different arguments (at least relative the number
|
||
|
|
# constructed). This method adds a cache to requirement object creation to
|
||
|
|
# minimize repeated parsing of the same string to construct equivalent
|
||
|
|
# Requirement objects.
|
||
|
|
return Requirement(req_string)
|
||
|
|
|
||
|
|
|
||
|
|
def safe_extra(extra: str) -> NormalizedExtra:
|
||
|
|
"""Convert an arbitrary string to a standard 'extra' name
|
||
|
|
|
||
|
|
Any runs of non-alphanumeric characters are replaced with a single '_',
|
||
|
|
and the result is always lowercased.
|
||
|
|
|
||
|
|
This function is duplicated from ``pkg_resources``. Note that this is not
|
||
|
|
the same to either ``canonicalize_name`` or ``_egg_link_name``.
|
||
|
|
"""
|
||
|
|
return cast(NormalizedExtra, re.sub("[^A-Za-z0-9.-]+", "_", extra).lower())
|