601 lines
20 KiB
Python
601 lines
20 KiB
Python
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import logging
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import sys
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from pip._vendor.contextlib2 import suppress
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from pip._vendor.packaging.specifiers import InvalidSpecifier, SpecifierSet
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from pip._vendor.packaging.utils import canonicalize_name
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from pip._vendor.packaging.version import Version
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from pip._internal.exceptions import HashError, MetadataInconsistent
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from pip._internal.network.lazy_wheel import (
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HTTPRangeRequestUnsupported,
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dist_from_wheel_url,
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)
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from pip._internal.req.constructors import (
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install_req_from_editable,
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install_req_from_line,
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)
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from pip._internal.req.req_install import InstallRequirement
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from pip._internal.utils.logging import indent_log
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from pip._internal.utils.misc import dist_is_editable, normalize_version_info
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from pip._internal.utils.packaging import get_requires_python
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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from .base import Candidate, format_name
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if MYPY_CHECK_RUNNING:
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from typing import Any, FrozenSet, Iterable, Optional, Tuple, Union
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from pip._vendor.packaging.version import _BaseVersion
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from pip._vendor.pkg_resources import Distribution
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from pip._internal.distributions import AbstractDistribution
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from pip._internal.models.link import Link
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from .base import Requirement
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from .factory import Factory
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BaseCandidate = Union[
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"AlreadyInstalledCandidate",
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"EditableCandidate",
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"LinkCandidate",
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]
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logger = logging.getLogger(__name__)
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def make_install_req_from_link(link, template):
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# type: (Link, InstallRequirement) -> InstallRequirement
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assert not template.editable, "template is editable"
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if template.req:
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line = str(template.req)
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else:
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line = link.url
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ireq = install_req_from_line(
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line,
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user_supplied=template.user_supplied,
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comes_from=template.comes_from,
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use_pep517=template.use_pep517,
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isolated=template.isolated,
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constraint=template.constraint,
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options=dict(
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install_options=template.install_options,
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global_options=template.global_options,
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hashes=template.hash_options
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),
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)
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ireq.original_link = template.original_link
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ireq.link = link
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return ireq
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def make_install_req_from_editable(link, template):
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# type: (Link, InstallRequirement) -> InstallRequirement
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assert template.editable, "template not editable"
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return install_req_from_editable(
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link.url,
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user_supplied=template.user_supplied,
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comes_from=template.comes_from,
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use_pep517=template.use_pep517,
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isolated=template.isolated,
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constraint=template.constraint,
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options=dict(
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install_options=template.install_options,
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global_options=template.global_options,
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hashes=template.hash_options
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),
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)
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def make_install_req_from_dist(dist, template):
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# type: (Distribution, InstallRequirement) -> InstallRequirement
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project_name = canonicalize_name(dist.project_name)
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if template.req:
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line = str(template.req)
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elif template.link:
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line = "{} @ {}".format(project_name, template.link.url)
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else:
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line = "{}=={}".format(project_name, dist.parsed_version)
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ireq = install_req_from_line(
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line,
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user_supplied=template.user_supplied,
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comes_from=template.comes_from,
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use_pep517=template.use_pep517,
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isolated=template.isolated,
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constraint=template.constraint,
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options=dict(
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install_options=template.install_options,
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global_options=template.global_options,
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hashes=template.hash_options
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),
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)
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ireq.satisfied_by = dist
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return ireq
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class _InstallRequirementBackedCandidate(Candidate):
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"""A candidate backed by an ``InstallRequirement``.
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This represents a package request with the target not being already
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in the environment, and needs to be fetched and installed. The backing
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``InstallRequirement`` is responsible for most of the leg work; this
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class exposes appropriate information to the resolver.
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:param link: The link passed to the ``InstallRequirement``. The backing
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``InstallRequirement`` will use this link to fetch the distribution.
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:param source_link: The link this candidate "originates" from. This is
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different from ``link`` when the link is found in the wheel cache.
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``link`` would point to the wheel cache, while this points to the
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found remote link (e.g. from pypi.org).
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"""
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is_installed = False
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def __init__(
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self,
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link, # type: Link
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source_link, # type: Link
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ireq, # type: InstallRequirement
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factory, # type: Factory
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name=None, # type: Optional[str]
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version=None, # type: Optional[_BaseVersion]
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):
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# type: (...) -> None
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self._link = link
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self._source_link = source_link
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self._factory = factory
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self._ireq = ireq
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self._name = name
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self._version = version
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self._dist = None # type: Optional[Distribution]
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self._prepared = False
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def __repr__(self):
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# type: () -> str
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return "{class_name}({link!r})".format(
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class_name=self.__class__.__name__,
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link=str(self._link),
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)
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def __hash__(self):
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# type: () -> int
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return hash((self.__class__, self._link))
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def __eq__(self, other):
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# type: (Any) -> bool
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if isinstance(other, self.__class__):
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return self._link == other._link
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return False
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# Needed for Python 2, which does not implement this by default
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def __ne__(self, other):
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# type: (Any) -> bool
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return not self.__eq__(other)
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@property
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def source_link(self):
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# type: () -> Optional[Link]
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return self._source_link
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@property
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def name(self):
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# type: () -> str
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"""The normalised name of the project the candidate refers to"""
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if self._name is None:
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self._name = canonicalize_name(self.dist.project_name)
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return self._name
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@property
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def version(self):
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# type: () -> _BaseVersion
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if self._version is None:
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self._version = self.dist.parsed_version
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return self._version
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def format_for_error(self):
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# type: () -> str
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return "{} {} (from {})".format(
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self.name,
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self.version,
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self._link.file_path if self._link.is_file else self._link
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)
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def _prepare_abstract_distribution(self):
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# type: () -> AbstractDistribution
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raise NotImplementedError("Override in subclass")
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def _check_metadata_consistency(self):
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# type: () -> None
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"""Check for consistency of project name and version of dist."""
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# TODO: (Longer term) Rather than abort, reject this candidate
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# and backtrack. This would need resolvelib support.
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dist = self._dist # type: Distribution
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name = canonicalize_name(dist.project_name)
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if self._name is not None and self._name != name:
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raise MetadataInconsistent(self._ireq, "name", dist.project_name)
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version = dist.parsed_version
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if self._version is not None and self._version != version:
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raise MetadataInconsistent(self._ireq, "version", dist.version)
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def _prepare(self):
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# type: () -> None
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if self._prepared:
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return
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try:
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abstract_dist = self._prepare_abstract_distribution()
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except HashError as e:
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e.req = self._ireq
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raise
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self._dist = abstract_dist.get_pkg_resources_distribution()
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assert self._dist is not None, "Distribution already installed"
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self._check_metadata_consistency()
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self._prepared = True
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def _fetch_metadata(self):
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# type: () -> None
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"""Fetch metadata, using lazy wheel if possible."""
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preparer = self._factory.preparer
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use_lazy_wheel = self._factory.use_lazy_wheel
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remote_wheel = self._link.is_wheel and not self._link.is_file
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if use_lazy_wheel and remote_wheel and not preparer.require_hashes:
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assert self._name is not None
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logger.info('Collecting %s', self._ireq.req or self._ireq)
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# If HTTPRangeRequestUnsupported is raised, fallback silently.
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with indent_log(), suppress(HTTPRangeRequestUnsupported):
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logger.info(
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'Obtaining dependency information from %s %s',
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self._name, self._version,
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)
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url = self._link.url.split('#', 1)[0]
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session = preparer.downloader._session
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self._dist = dist_from_wheel_url(self._name, url, session)
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self._check_metadata_consistency()
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if self._dist is None:
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self._prepare()
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@property
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def dist(self):
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# type: () -> Distribution
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if self._dist is None:
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self._fetch_metadata()
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return self._dist
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def _get_requires_python_specifier(self):
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# type: () -> Optional[SpecifierSet]
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requires_python = get_requires_python(self.dist)
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if requires_python is None:
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return None
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try:
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spec = SpecifierSet(requires_python)
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except InvalidSpecifier as e:
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logger.warning(
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"Package %r has an invalid Requires-Python: %s", self.name, e,
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)
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return None
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return spec
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def iter_dependencies(self, with_requires):
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# type: (bool) -> Iterable[Optional[Requirement]]
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if not with_requires:
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return
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for r in self.dist.requires():
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yield self._factory.make_requirement_from_spec(str(r), self._ireq)
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python_dep = self._factory.make_requires_python_requirement(
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self._get_requires_python_specifier(),
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)
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if python_dep:
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yield python_dep
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def get_install_requirement(self):
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# type: () -> Optional[InstallRequirement]
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self._prepare()
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return self._ireq
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class LinkCandidate(_InstallRequirementBackedCandidate):
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is_editable = False
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def __init__(
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self,
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link, # type: Link
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template, # type: InstallRequirement
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factory, # type: Factory
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name=None, # type: Optional[str]
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version=None, # type: Optional[_BaseVersion]
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):
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# type: (...) -> None
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source_link = link
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cache_entry = factory.get_wheel_cache_entry(link, name)
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if cache_entry is not None:
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logger.debug("Using cached wheel link: %s", cache_entry.link)
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link = cache_entry.link
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ireq = make_install_req_from_link(link, template)
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if (cache_entry is not None and
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cache_entry.persistent and
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template.link is template.original_link):
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ireq.original_link_is_in_wheel_cache = True
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super(LinkCandidate, self).__init__(
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link=link,
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source_link=source_link,
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ireq=ireq,
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factory=factory,
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name=name,
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version=version,
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)
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def _prepare_abstract_distribution(self):
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# type: () -> AbstractDistribution
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return self._factory.preparer.prepare_linked_requirement(
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self._ireq, parallel_builds=True,
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)
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class EditableCandidate(_InstallRequirementBackedCandidate):
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is_editable = True
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def __init__(
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self,
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link, # type: Link
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template, # type: InstallRequirement
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factory, # type: Factory
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name=None, # type: Optional[str]
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version=None, # type: Optional[_BaseVersion]
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):
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# type: (...) -> None
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super(EditableCandidate, self).__init__(
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link=link,
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source_link=link,
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ireq=make_install_req_from_editable(link, template),
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factory=factory,
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name=name,
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version=version,
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)
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def _prepare_abstract_distribution(self):
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# type: () -> AbstractDistribution
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return self._factory.preparer.prepare_editable_requirement(self._ireq)
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class AlreadyInstalledCandidate(Candidate):
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is_installed = True
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source_link = None
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def __init__(
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self,
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dist, # type: Distribution
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template, # type: InstallRequirement
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factory, # type: Factory
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):
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# type: (...) -> None
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self.dist = dist
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self._ireq = make_install_req_from_dist(dist, template)
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self._factory = factory
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# This is just logging some messages, so we can do it eagerly.
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# The returned dist would be exactly the same as self.dist because we
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# set satisfied_by in make_install_req_from_dist.
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# TODO: Supply reason based on force_reinstall and upgrade_strategy.
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skip_reason = "already satisfied"
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factory.preparer.prepare_installed_requirement(self._ireq, skip_reason)
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def __repr__(self):
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# type: () -> str
|
||
|
|
return "{class_name}({distribution!r})".format(
|
||
|
|
class_name=self.__class__.__name__,
|
||
|
|
distribution=self.dist,
|
||
|
|
)
|
||
|
|
|
||
|
|
def __hash__(self):
|
||
|
|
# type: () -> int
|
||
|
|
return hash((self.__class__, self.name, self.version))
|
||
|
|
|
||
|
|
def __eq__(self, other):
|
||
|
|
# type: (Any) -> bool
|
||
|
|
if isinstance(other, self.__class__):
|
||
|
|
return self.name == other.name and self.version == other.version
|
||
|
|
return False
|
||
|
|
|
||
|
|
# Needed for Python 2, which does not implement this by default
|
||
|
|
def __ne__(self, other):
|
||
|
|
# type: (Any) -> bool
|
||
|
|
return not self.__eq__(other)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def name(self):
|
||
|
|
# type: () -> str
|
||
|
|
return canonicalize_name(self.dist.project_name)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def version(self):
|
||
|
|
# type: () -> _BaseVersion
|
||
|
|
return self.dist.parsed_version
|
||
|
|
|
||
|
|
@property
|
||
|
|
def is_editable(self):
|
||
|
|
# type: () -> bool
|
||
|
|
return dist_is_editable(self.dist)
|
||
|
|
|
||
|
|
def format_for_error(self):
|
||
|
|
# type: () -> str
|
||
|
|
return "{} {} (Installed)".format(self.name, self.version)
|
||
|
|
|
||
|
|
def iter_dependencies(self, with_requires):
|
||
|
|
# type: (bool) -> Iterable[Optional[Requirement]]
|
||
|
|
if not with_requires:
|
||
|
|
return
|
||
|
|
for r in self.dist.requires():
|
||
|
|
yield self._factory.make_requirement_from_spec(str(r), self._ireq)
|
||
|
|
|
||
|
|
def get_install_requirement(self):
|
||
|
|
# type: () -> Optional[InstallRequirement]
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
class ExtrasCandidate(Candidate):
|
||
|
|
"""A candidate that has 'extras', indicating additional dependencies.
|
||
|
|
|
||
|
|
Requirements can be for a project with dependencies, something like
|
||
|
|
foo[extra]. The extras don't affect the project/version being installed
|
||
|
|
directly, but indicate that we need additional dependencies. We model that
|
||
|
|
by having an artificial ExtrasCandidate that wraps the "base" candidate.
|
||
|
|
|
||
|
|
The ExtrasCandidate differs from the base in the following ways:
|
||
|
|
|
||
|
|
1. It has a unique name, of the form foo[extra]. This causes the resolver
|
||
|
|
to treat it as a separate node in the dependency graph.
|
||
|
|
2. When we're getting the candidate's dependencies,
|
||
|
|
a) We specify that we want the extra dependencies as well.
|
||
|
|
b) We add a dependency on the base candidate.
|
||
|
|
See below for why this is needed.
|
||
|
|
3. We return None for the underlying InstallRequirement, as the base
|
||
|
|
candidate will provide it, and we don't want to end up with duplicates.
|
||
|
|
|
||
|
|
The dependency on the base candidate is needed so that the resolver can't
|
||
|
|
decide that it should recommend foo[extra1] version 1.0 and foo[extra2]
|
||
|
|
version 2.0. Having those candidates depend on foo=1.0 and foo=2.0
|
||
|
|
respectively forces the resolver to recognise that this is a conflict.
|
||
|
|
"""
|
||
|
|
def __init__(
|
||
|
|
self,
|
||
|
|
base, # type: BaseCandidate
|
||
|
|
extras, # type: FrozenSet[str]
|
||
|
|
):
|
||
|
|
# type: (...) -> None
|
||
|
|
self.base = base
|
||
|
|
self.extras = extras
|
||
|
|
|
||
|
|
def __repr__(self):
|
||
|
|
# type: () -> str
|
||
|
|
return "{class_name}(base={base!r}, extras={extras!r})".format(
|
||
|
|
class_name=self.__class__.__name__,
|
||
|
|
base=self.base,
|
||
|
|
extras=self.extras,
|
||
|
|
)
|
||
|
|
|
||
|
|
def __hash__(self):
|
||
|
|
# type: () -> int
|
||
|
|
return hash((self.base, self.extras))
|
||
|
|
|
||
|
|
def __eq__(self, other):
|
||
|
|
# type: (Any) -> bool
|
||
|
|
if isinstance(other, self.__class__):
|
||
|
|
return self.base == other.base and self.extras == other.extras
|
||
|
|
return False
|
||
|
|
|
||
|
|
# Needed for Python 2, which does not implement this by default
|
||
|
|
def __ne__(self, other):
|
||
|
|
# type: (Any) -> bool
|
||
|
|
return not self.__eq__(other)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def name(self):
|
||
|
|
# type: () -> str
|
||
|
|
"""The normalised name of the project the candidate refers to"""
|
||
|
|
return format_name(self.base.name, self.extras)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def version(self):
|
||
|
|
# type: () -> _BaseVersion
|
||
|
|
return self.base.version
|
||
|
|
|
||
|
|
def format_for_error(self):
|
||
|
|
# type: () -> str
|
||
|
|
return "{} [{}]".format(
|
||
|
|
self.base.format_for_error(),
|
||
|
|
", ".join(sorted(self.extras))
|
||
|
|
)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def is_installed(self):
|
||
|
|
# type: () -> bool
|
||
|
|
return self.base.is_installed
|
||
|
|
|
||
|
|
@property
|
||
|
|
def is_editable(self):
|
||
|
|
# type: () -> bool
|
||
|
|
return self.base.is_editable
|
||
|
|
|
||
|
|
@property
|
||
|
|
def source_link(self):
|
||
|
|
# type: () -> Optional[Link]
|
||
|
|
return self.base.source_link
|
||
|
|
|
||
|
|
def iter_dependencies(self, with_requires):
|
||
|
|
# type: (bool) -> Iterable[Optional[Requirement]]
|
||
|
|
factory = self.base._factory
|
||
|
|
|
||
|
|
# Add a dependency on the exact base
|
||
|
|
# (See note 2b in the class docstring)
|
||
|
|
yield factory.make_requirement_from_candidate(self.base)
|
||
|
|
if not with_requires:
|
||
|
|
return
|
||
|
|
|
||
|
|
# The user may have specified extras that the candidate doesn't
|
||
|
|
# support. We ignore any unsupported extras here.
|
||
|
|
valid_extras = self.extras.intersection(self.base.dist.extras)
|
||
|
|
invalid_extras = self.extras.difference(self.base.dist.extras)
|
||
|
|
for extra in sorted(invalid_extras):
|
||
|
|
logger.warning(
|
||
|
|
"%s %s does not provide the extra '%s'",
|
||
|
|
self.base.name,
|
||
|
|
self.version,
|
||
|
|
extra
|
||
|
|
)
|
||
|
|
|
||
|
|
for r in self.base.dist.requires(valid_extras):
|
||
|
|
requirement = factory.make_requirement_from_spec(
|
||
|
|
str(r), self.base._ireq, valid_extras,
|
||
|
|
)
|
||
|
|
if requirement:
|
||
|
|
yield requirement
|
||
|
|
|
||
|
|
def get_install_requirement(self):
|
||
|
|
# type: () -> Optional[InstallRequirement]
|
||
|
|
# We don't return anything here, because we always
|
||
|
|
# depend on the base candidate, and we'll get the
|
||
|
|
# install requirement from that.
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
class RequiresPythonCandidate(Candidate):
|
||
|
|
is_installed = False
|
||
|
|
source_link = None
|
||
|
|
|
||
|
|
def __init__(self, py_version_info):
|
||
|
|
# type: (Optional[Tuple[int, ...]]) -> None
|
||
|
|
if py_version_info is not None:
|
||
|
|
version_info = normalize_version_info(py_version_info)
|
||
|
|
else:
|
||
|
|
version_info = sys.version_info[:3]
|
||
|
|
self._version = Version(".".join(str(c) for c in version_info))
|
||
|
|
|
||
|
|
# We don't need to implement __eq__() and __ne__() since there is always
|
||
|
|
# only one RequiresPythonCandidate in a resolution, i.e. the host Python.
|
||
|
|
# The built-in object.__eq__() and object.__ne__() do exactly what we want.
|
||
|
|
|
||
|
|
@property
|
||
|
|
def name(self):
|
||
|
|
# type: () -> str
|
||
|
|
# Avoid conflicting with the PyPI package "Python".
|
||
|
|
return "<Python from Requires-Python>"
|
||
|
|
|
||
|
|
@property
|
||
|
|
def version(self):
|
||
|
|
# type: () -> _BaseVersion
|
||
|
|
return self._version
|
||
|
|
|
||
|
|
def format_for_error(self):
|
||
|
|
# type: () -> str
|
||
|
|
return "Python {}".format(self.version)
|
||
|
|
|
||
|
|
def iter_dependencies(self, with_requires):
|
||
|
|
# type: (bool) -> Iterable[Optional[Requirement]]
|
||
|
|
return ()
|
||
|
|
|
||
|
|
def get_install_requirement(self):
|
||
|
|
# type: () -> Optional[InstallRequirement]
|
||
|
|
return None
|