You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
3.0 KiB
95 lines
3.0 KiB
5 years ago
|
from __future__ import absolute_import
|
||
|
|
|
||
|
|
import logging
|
||
|
|
from email.parser import FeedParser
|
||
|
|
|
||
|
|
from pip._vendor import pkg_resources
|
||
|
|
from pip._vendor.packaging import specifiers, version
|
||
|
|
|
||
|
|
from pip._internal.exceptions import NoneMetadataError
|
||
|
|
from pip._internal.utils.misc import display_path
|
||
|
|
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
|
||
|
|
|
||
|
|
if MYPY_CHECK_RUNNING:
|
||
|
|
from typing import Optional, Tuple
|
||
|
|
from email.message import Message
|
||
|
|
from pip._vendor.pkg_resources import Distribution
|
||
|
|
|
||
|
|
|
||
|
|
logger = logging.getLogger(__name__)
|
||
|
|
|
||
|
|
|
||
|
|
def check_requires_python(requires_python, version_info):
|
||
|
|
# type: (Optional[str], 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
|
||
|
|
|
||
|
|
|
||
|
|
def get_metadata(dist):
|
||
|
|
# type: (Distribution) -> Message
|
||
|
|
"""
|
||
|
|
:raises NoneMetadataError: if the distribution reports `has_metadata()`
|
||
|
|
True but `get_metadata()` returns None.
|
||
|
|
"""
|
||
|
|
metadata_name = 'METADATA'
|
||
|
|
if (isinstance(dist, pkg_resources.DistInfoDistribution) and
|
||
|
|
dist.has_metadata(metadata_name)):
|
||
|
|
metadata = dist.get_metadata(metadata_name)
|
||
|
|
elif dist.has_metadata('PKG-INFO'):
|
||
|
|
metadata_name = 'PKG-INFO'
|
||
|
|
metadata = dist.get_metadata(metadata_name)
|
||
|
|
else:
|
||
|
|
logger.warning("No metadata found in %s", display_path(dist.location))
|
||
|
|
metadata = ''
|
||
|
|
|
||
|
|
if metadata is None:
|
||
|
|
raise NoneMetadataError(dist, metadata_name)
|
||
|
|
|
||
|
|
feed_parser = FeedParser()
|
||
|
|
# The following line errors out if with a "NoneType" TypeError if
|
||
|
|
# passed metadata=None.
|
||
|
|
feed_parser.feed(metadata)
|
||
|
|
return feed_parser.close()
|
||
|
|
|
||
|
|
|
||
|
|
def get_requires_python(dist):
|
||
|
|
# type: (pkg_resources.Distribution) -> Optional[str]
|
||
|
|
"""
|
||
|
|
Return the "Requires-Python" metadata for a distribution, or None
|
||
|
|
if not present.
|
||
|
|
"""
|
||
|
|
pkg_info_dict = get_metadata(dist)
|
||
|
|
requires_python = pkg_info_dict.get('Requires-Python')
|
||
|
|
|
||
|
|
if requires_python is not None:
|
||
|
|
# Convert to a str to satisfy the type checker, since requires_python
|
||
|
|
# can be a Header object.
|
||
|
|
requires_python = str(requires_python)
|
||
|
|
|
||
|
|
return requires_python
|
||
|
|
|
||
|
|
|
||
|
|
def get_installer(dist):
|
||
|
|
# type: (Distribution) -> str
|
||
|
|
if dist.has_metadata('INSTALLER'):
|
||
|
|
for line in dist.get_metadata_lines('INSTALLER'):
|
||
|
|
if line.strip():
|
||
|
|
return line.strip()
|
||
|
|
return ''
|