mirror of https://github.com/pypa/pip
118 lines
3.4 KiB
Python
118 lines
3.4 KiB
Python
from pip._vendor.packaging.specifiers import SpecifierSet
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from pip._vendor.packaging.utils import canonicalize_name
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from pip._internal.req.req_install import InstallRequirement
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from pip._internal.utils.hashes import Hashes
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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if MYPY_CHECK_RUNNING:
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from typing import FrozenSet, Iterable, Optional, Tuple
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from pip._vendor.packaging.version import _BaseVersion
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from pip._internal.models.link import Link
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CandidateLookup = Tuple[
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Optional["Candidate"],
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Optional[InstallRequirement],
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]
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def format_name(project, extras):
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# type: (str, FrozenSet[str]) -> str
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if not extras:
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return project
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canonical_extras = sorted(canonicalize_name(e) for e in extras)
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return "{}[{}]".format(project, ",".join(canonical_extras))
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class Constraint(object):
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def __init__(self, specifier, hashes):
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# type: (SpecifierSet, Hashes) -> None
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self.specifier = specifier
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self.hashes = hashes
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@classmethod
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def empty(cls):
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# type: () -> Constraint
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return Constraint(SpecifierSet(), Hashes())
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@classmethod
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def from_ireq(cls, ireq):
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# type: (InstallRequirement) -> Constraint
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return Constraint(ireq.specifier, ireq.hashes(trust_internet=False))
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def __nonzero__(self):
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# type: () -> bool
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return bool(self.specifier) or bool(self.hashes)
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def __bool__(self):
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# type: () -> bool
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return self.__nonzero__()
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def __and__(self, other):
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# type: (InstallRequirement) -> Constraint
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if not isinstance(other, InstallRequirement):
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return NotImplemented
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specifier = self.specifier & other.specifier
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hashes = self.hashes & other.hashes(trust_internet=False)
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return Constraint(specifier, hashes)
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class Requirement(object):
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@property
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def name(self):
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# type: () -> str
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raise NotImplementedError("Subclass should override")
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def is_satisfied_by(self, candidate):
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# type: (Candidate) -> bool
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return False
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def get_candidate_lookup(self):
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# type: () -> CandidateLookup
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raise NotImplementedError("Subclass should override")
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def format_for_error(self):
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# type: () -> str
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raise NotImplementedError("Subclass should override")
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class Candidate(object):
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@property
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def name(self):
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# type: () -> str
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raise NotImplementedError("Override in subclass")
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@property
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def version(self):
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# type: () -> _BaseVersion
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raise NotImplementedError("Override in subclass")
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@property
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def is_installed(self):
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# type: () -> bool
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raise NotImplementedError("Override in subclass")
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@property
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def is_editable(self):
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# type: () -> bool
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raise NotImplementedError("Override in subclass")
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@property
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def source_link(self):
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# type: () -> Optional[Link]
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raise NotImplementedError("Override in subclass")
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def iter_dependencies(self, with_requires):
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# type: (bool) -> Iterable[Optional[Requirement]]
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raise NotImplementedError("Override in subclass")
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def get_install_requirement(self):
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# type: () -> Optional[InstallRequirement]
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raise NotImplementedError("Override in subclass")
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def format_for_error(self):
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# type: () -> str
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raise NotImplementedError("Subclass should override")
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