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- from __future__ import absolute_import
- from email.parser import FeedParser
- import logging
- import sys
- from pip._vendor.packaging import specifiers
- from pip._vendor.packaging import version
- from pip._vendor import pkg_resources
- from pip import exceptions
- logger = logging.getLogger(__name__)
- def check_requires_python(requires_python):
- """
- Check if the python version in use match the `requires_python` specifier.
- Returns `True` if the version of python in use matches the requirement.
- Returns `False` if the version of python in use does not matches the
- requirement.
- Raises an InvalidSpecifier if `requires_python` have an invalid format.
- """
- if requires_python is None:
- # The package provides no information
- return True
- requires_python_specifier = specifiers.SpecifierSet(requires_python)
- # We only use major.minor.micro
- python_version = version.parse('.'.join(map(str, sys.version_info[:3])))
- return python_version in requires_python_specifier
- def get_metadata(dist):
- if (isinstance(dist, pkg_resources.DistInfoDistribution) and
- dist.has_metadata('METADATA')):
- return dist.get_metadata('METADATA')
- elif dist.has_metadata('PKG-INFO'):
- return dist.get_metadata('PKG-INFO')
- def check_dist_requires_python(dist):
- metadata = get_metadata(dist)
- feed_parser = FeedParser()
- feed_parser.feed(metadata)
- pkg_info_dict = feed_parser.close()
- requires_python = pkg_info_dict.get('Requires-Python')
- try:
- if not check_requires_python(requires_python):
- raise exceptions.UnsupportedPythonVersion(
- "%s requires Python '%s' but the running Python is %s" % (
- dist.project_name,
- requires_python,
- '.'.join(map(str, sys.version_info[:3])),)
- )
- except specifiers.InvalidSpecifier as e:
- logger.warning(
- "Package %s has an invalid Requires-Python entry %s - %s" % (
- dist.project_name, requires_python, e))
- return
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