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from typing import TYPE_CHECKING, List, Optional
from pip._vendor.resolvelib.resolvers import RequirementInformation
from pip._internal.models.candidate import InstallationCandidate
from pip._internal.models.link import Link
from pip._internal.req.constructors import install_req_from_req_string
from pip._internal.resolution.resolvelib.factory import Factory
from pip._internal.resolution.resolvelib.provider import PipProvider
from pip._internal.resolution.resolvelib.requirements import SpecifierRequirement
if TYPE_CHECKING:
from pip._internal.resolution.resolvelib.provider import PreferenceInformation
def build_requirement_information(
name: str, parent: Optional[InstallationCandidate]
) -> List["PreferenceInformation"]:
install_requirement = install_req_from_req_string(name)
# RequirementInformation is typed as a tuple, but it is a namedtupled.
# https://github.com/sarugaku/resolvelib/blob/7bc025aa2a4e979597c438ad7b17d2e8a08a364e/src/resolvelib/resolvers.pyi#L20-L22
requirement_information: "PreferenceInformation" = RequirementInformation(
requirement=SpecifierRequirement(install_requirement), # type: ignore[call-arg]
parent=parent,
)
return [requirement_information]
def test_provider_known_depths(factory: Factory) -> None:
# Root requirement is specified by the user
# therefore has an inferred depth of 1
root_requirement_name = "my-package"
provider = PipProvider(
factory=factory,
constraints={},
ignore_dependencies=False,
upgrade_strategy="to-satisfy-only",
user_requested={root_requirement_name: 0},
)
root_requirement_information = build_requirement_information(
name=root_requirement_name, parent=None
)
provider.get_preference(
identifier=root_requirement_name,
resolutions={},
candidates={},
information={root_requirement_name: root_requirement_information},
backtrack_causes=[],
)
assert provider._known_depths == {root_requirement_name: 1.0}
# Transative requirement is a dependency of root requirement
# theforefore has an inferred depth of 2
root_package_candidate = InstallationCandidate(
root_requirement_name,
"1.0",
Link("https://{root_requirement_name}.com"),
)
transative_requirement_name = "my-transitive-package"
transative_package_information = build_requirement_information(
name=transative_requirement_name, parent=root_package_candidate
)
provider.get_preference(
identifier=transative_requirement_name,
resolutions={},
candidates={},
information={
root_requirement_name: root_requirement_information,
transative_requirement_name: transative_package_information,
},
backtrack_causes=[],
)
assert provider._known_depths == {
transative_requirement_name: 2.0,
root_requirement_name: 1.0,
}
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