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86 lines
2.7 KiB
Python
86 lines
2.7 KiB
Python
6 years ago
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from __future__ import absolute_import
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import logging
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import sys
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from email.parser import FeedParser
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from pip._vendor import pkg_resources
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from pip._vendor.packaging import specifiers, version
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from pip._internal import exceptions
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from pip._internal.utils.misc import display_path
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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if MYPY_CHECK_RUNNING:
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from typing import Optional # noqa: F401
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from email.message import Message # noqa: F401
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from pip._vendor.pkg_resources import Distribution # noqa: F401
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logger = logging.getLogger(__name__)
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def check_requires_python(requires_python):
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# type: (Optional[str]) -> bool
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"""
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Check if the python version in use match the `requires_python` specifier.
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Returns `True` if the version of python in use matches the requirement.
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Returns `False` if the version of python in use does not matches the
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requirement.
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Raises an InvalidSpecifier if `requires_python` have an invalid format.
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"""
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if requires_python is None:
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# The package provides no information
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return True
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requires_python_specifier = specifiers.SpecifierSet(requires_python)
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# We only use major.minor.micro
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python_version = version.parse('.'.join(map(str, sys.version_info[:3])))
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return python_version in requires_python_specifier
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def get_metadata(dist):
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# type: (Distribution) -> Message
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if (isinstance(dist, pkg_resources.DistInfoDistribution) and
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dist.has_metadata('METADATA')):
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metadata = dist.get_metadata('METADATA')
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elif dist.has_metadata('PKG-INFO'):
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metadata = dist.get_metadata('PKG-INFO')
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else:
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logger.warning("No metadata found in %s", display_path(dist.location))
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metadata = ''
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feed_parser = FeedParser()
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feed_parser.feed(metadata)
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return feed_parser.close()
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def check_dist_requires_python(dist):
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pkg_info_dict = get_metadata(dist)
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requires_python = pkg_info_dict.get('Requires-Python')
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try:
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if not check_requires_python(requires_python):
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raise exceptions.UnsupportedPythonVersion(
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"%s requires Python '%s' but the running Python is %s" % (
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dist.project_name,
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requires_python,
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'.'.join(map(str, sys.version_info[:3])),)
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)
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except specifiers.InvalidSpecifier as e:
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logger.warning(
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"Package %s has an invalid Requires-Python entry %s - %s",
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dist.project_name, requires_python, e,
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)
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return
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def get_installer(dist):
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# type: (Distribution) -> str
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if dist.has_metadata('INSTALLER'):
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for line in dist.get_metadata_lines('INSTALLER'):
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if line.strip():
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return line.strip()
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return ''
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