| 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 |
