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from pip._vendor.packaging.utils import canonicalize_name
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
if MYPY_CHECK_RUNNING:
from typing import Optional, Sequence, Set
from pip._internal.req.req_install import InstallRequirement
from pip._vendor.packaging.version import _BaseVersion
def format_name(project, extras):
# type: (str, Set[str]) -> str
if not extras:
return project
canonical_extras = sorted(canonicalize_name(e) for e in extras)
return "{}[{}]".format(project, ",".join(canonical_extras))
class Requirement(object):
@property
def name(self):
# type: () -> str
raise NotImplementedError("Subclass should override")
def find_matches(self):
# type: () -> Sequence[Candidate]
raise NotImplementedError("Subclass should override")
def is_satisfied_by(self, candidate):
# type: (Candidate) -> bool
return False
class Candidate(object):
@property
def name(self):
# type: () -> str
raise NotImplementedError("Override in subclass")
@property
def version(self):
# type: () -> _BaseVersion
raise NotImplementedError("Override in subclass")
def get_dependencies(self):
# type: () -> Sequence[Requirement]
raise NotImplementedError("Override in subclass")
def get_install_requirement(self):
# type: () -> Optional[InstallRequirement]
raise NotImplementedError("Override in subclass")