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from pip._vendor.packaging.utils import canonicalize_name
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
from .base import Requirement, format_name
if MYPY_CHECK_RUNNING:
from typing import Sequence
from pip._vendor.packaging.specifiers import SpecifierSet
from pip._internal.req.req_install import InstallRequirement
from .base import Candidate
from .factory import Factory
class ExplicitRequirement(Requirement):
def __init__(self, candidate):
# type: (Candidate) -> None
self.candidate = candidate
def __repr__(self):
# type: () -> str
return "{class_name}({candidate!r})".format(
class_name=self.__class__.__name__,
candidate=self.candidate,
)
@property
def name(self):
# type: () -> str
# No need to canonicalise - the candidate did this
return self.candidate.name
def find_matches(self):
# type: () -> Sequence[Candidate]
return [self.candidate]
def is_satisfied_by(self, candidate):
# type: (Candidate) -> bool
return candidate == self.candidate
class SpecifierRequirement(Requirement):
def __init__(self, ireq, factory):
# type: (InstallRequirement, Factory) -> None
assert ireq.link is None, "This is a link, not a specifier"
self._ireq = ireq
self._factory = factory
self.extras = ireq.req.extras
def __str__(self):
# type: () -> str
return str(self._ireq.req)
def __repr__(self):
# type: () -> str
return "{class_name}({requirement!r})".format(
class_name=self.__class__.__name__,
requirement=str(self._ireq.req),
)
@property
def name(self):
# type: () -> str
canonical_name = canonicalize_name(self._ireq.req.name)
return format_name(canonical_name, self.extras)
def find_matches(self):
# type: () -> Sequence[Candidate]
it = self._factory.iter_found_candidates(self._ireq, self.extras)
return list(it)
def is_satisfied_by(self, candidate):
# type: (Candidate) -> bool
assert candidate.name == self.name, \
"Internal issue: Candidate is not for this requirement " \
" {} vs {}".format(candidate.name, self.name)
# We can safely always allow prereleases here since PackageFinder
# already implements the prerelease logic, and would have filtered out
# prerelease candidates if the user does not expect them.
spec = self._ireq.req.specifier
return spec.contains(candidate.version, prereleases=True)
class RequiresPythonRequirement(Requirement):
"""A requirement representing Requires-Python metadata.
"""
def __init__(self, specifier, match):
# type: (SpecifierSet, Candidate) -> None
self.specifier = specifier
self._candidate = match
def __repr__(self):
# type: () -> str
return "{class_name}({specifier!r})".format(
class_name=self.__class__.__name__,
specifier=str(self.specifier),
)
@property
def name(self):
# type: () -> str
return self._candidate.name
def find_matches(self):
# type: () -> Sequence[Candidate]
if self._candidate.version in self.specifier:
return [self._candidate]
return []
def is_satisfied_by(self, candidate):
# type: (Candidate) -> bool
assert candidate.name == self._candidate.name, "Not Python candidate"
# We can safely always allow prereleases here since PackageFinder
# already implements the prerelease logic, and would have filtered out
# prerelease candidates if the user does not expect them.
return self.specifier.contains(candidate.version, prereleases=True)
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