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89 lines
2.8 KiB
89 lines
2.8 KiB
import logging |
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from email.message import Message |
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from email.parser import FeedParser |
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from typing import Optional, Tuple |
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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._vendor.pkg_resources import Distribution |
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from pip._internal.exceptions import NoneMetadataError |
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from pip._internal.utils.misc import display_path |
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logger = logging.getLogger(__name__) |
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def check_requires_python(requires_python, version_info): |
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# type: (Optional[str], Tuple[int, ...]) -> bool |
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""" |
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Check if the given Python version matches a "Requires-Python" specifier. |
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:param version_info: A 3-tuple of ints representing a Python |
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major-minor-micro version to check (e.g. `sys.version_info[:3]`). |
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:return: `True` if the given Python version satisfies the requirement. |
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Otherwise, return `False`. |
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:raises InvalidSpecifier: If `requires_python` has 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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python_version = version.parse(".".join(map(str, version_info))) |
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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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""" |
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:raises NoneMetadataError: if the distribution reports `has_metadata()` |
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True but `get_metadata()` returns None. |
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""" |
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metadata_name = "METADATA" |
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if isinstance(dist, pkg_resources.DistInfoDistribution) and dist.has_metadata( |
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metadata_name |
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): |
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metadata = dist.get_metadata(metadata_name) |
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elif dist.has_metadata("PKG-INFO"): |
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metadata_name = "PKG-INFO" |
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metadata = dist.get_metadata(metadata_name) |
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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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if metadata is None: |
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raise NoneMetadataError(dist, metadata_name) |
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feed_parser = FeedParser() |
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# The following line errors out if with a "NoneType" TypeError if |
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# passed metadata=None. |
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feed_parser.feed(metadata) |
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return feed_parser.close() |
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def get_requires_python(dist): |
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# type: (pkg_resources.Distribution) -> Optional[str] |
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""" |
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Return the "Requires-Python" metadata for a distribution, or None |
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if not present. |
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""" |
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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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if requires_python is not None: |
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# Convert to a str to satisfy the type checker, since requires_python |
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# can be a Header object. |
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requires_python = str(requires_python) |
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return requires_python |
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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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