137 lines
4.4 KiB
Python
137 lines
4.4 KiB
Python
from pip._vendor.packaging.utils import canonicalize_name
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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from .base import Requirement, format_name
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if MYPY_CHECK_RUNNING:
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from pip._vendor.packaging.specifiers import SpecifierSet
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from pip._internal.req.req_install import InstallRequirement
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from .base import Candidate, CandidateLookup
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class ExplicitRequirement(Requirement):
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def __init__(self, candidate):
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# type: (Candidate) -> None
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self.candidate = candidate
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def __repr__(self):
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# type: () -> str
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return "{class_name}({candidate!r})".format(
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class_name=self.__class__.__name__,
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candidate=self.candidate,
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)
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@property
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def name(self):
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# type: () -> str
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# No need to canonicalise - the candidate did this
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return self.candidate.name
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def format_for_error(self):
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# type: () -> str
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return self.candidate.format_for_error()
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def get_candidate_lookup(self):
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# type: () -> CandidateLookup
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return self.candidate, None
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def is_satisfied_by(self, candidate):
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# type: (Candidate) -> bool
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return candidate == self.candidate
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class SpecifierRequirement(Requirement):
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def __init__(self, ireq):
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# type: (InstallRequirement) -> None
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assert ireq.link is None, "This is a link, not a specifier"
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self._ireq = ireq
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self._extras = frozenset(ireq.extras)
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def __str__(self):
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# type: () -> str
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return str(self._ireq.req)
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def __repr__(self):
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# type: () -> str
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return "{class_name}({requirement!r})".format(
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class_name=self.__class__.__name__,
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requirement=str(self._ireq.req),
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)
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@property
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def name(self):
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# type: () -> str
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canonical_name = canonicalize_name(self._ireq.req.name)
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return format_name(canonical_name, self._extras)
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def format_for_error(self):
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# type: () -> str
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# Convert comma-separated specifiers into "A, B, ..., F and G"
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# This makes the specifier a bit more "human readable", without
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# risking a change in meaning. (Hopefully! Not all edge cases have
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# been checked)
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parts = [s.strip() for s in str(self).split(",")]
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if len(parts) == 0:
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return ""
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elif len(parts) == 1:
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return parts[0]
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return ", ".join(parts[:-1]) + " and " + parts[-1]
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def get_candidate_lookup(self):
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# type: () -> CandidateLookup
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return None, self._ireq
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def is_satisfied_by(self, candidate):
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# type: (Candidate) -> bool
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assert candidate.name == self.name, \
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"Internal issue: Candidate is not for this requirement " \
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" {} vs {}".format(candidate.name, self.name)
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# We can safely always allow prereleases here since PackageFinder
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# already implements the prerelease logic, and would have filtered out
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# prerelease candidates if the user does not expect them.
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spec = self._ireq.req.specifier
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return spec.contains(candidate.version, prereleases=True)
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class RequiresPythonRequirement(Requirement):
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"""A requirement representing Requires-Python metadata.
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"""
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def __init__(self, specifier, match):
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# type: (SpecifierSet, Candidate) -> None
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self.specifier = specifier
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self._candidate = match
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def __repr__(self):
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# type: () -> str
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return "{class_name}({specifier!r})".format(
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class_name=self.__class__.__name__,
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specifier=str(self.specifier),
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)
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@property
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def name(self):
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# type: () -> str
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return self._candidate.name
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def format_for_error(self):
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# type: () -> str
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return "Python " + str(self.specifier)
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def get_candidate_lookup(self):
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# type: () -> CandidateLookup
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if self.specifier.contains(self._candidate.version, prereleases=True):
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return self._candidate, None
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return None, None
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def is_satisfied_by(self, candidate):
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# type: (Candidate) -> bool
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assert candidate.name == self._candidate.name, "Not Python candidate"
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# We can safely always allow prereleases here since PackageFinder
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# already implements the prerelease logic, and would have filtered out
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# prerelease candidates if the user does not expect them.
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return self.specifier.contains(candidate.version, prereleases=True)
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