Update factory implementation for resolvelib 0.7.0

news/resolvelib.vendor.rst

-Upgrade vendored resolvelib to 0.6.0.
+Upgrade vendored resolvelib to 0.7.0.

src/pip/_internal/resolution/resolvelib/provider.py

-from typing import (
-    TYPE_CHECKING,
-    Dict,
-    Iterable,
-    Iterator,
-    Mapping,
-    Optional,
-    Sequence,
-    Union,
-)
+from typing import TYPE_CHECKING, Dict, Iterable, Iterator, Mapping, Sequence, Union
 
 from pip._vendor.resolvelib.providers import AbstractProvider
 
@@ -75,11 +66,11 @@ class PipProvider(_ProviderBase):
 
     def get_preference(
         self,
-        resolution,  # type: Optional[Candidate]
-        candidates,  # type: Iterable[Candidate]
-        information,  # type: Iterable[PreferenceInformation]
-    ):
-        # type: (...) -> Preference
+        identifier: str,
+        resolutions: Mapping[str, Candidate],
+        candidates: Mapping[str, Iterator[Candidate]],
+        information: Mapping[str, Iterator["PreferenceInformation"]],
+    ) -> "Preference":
         """Produce a sort key for given requirement based on preference.
 
         The lower the return value is, the more preferred this group of
@@ -127,9 +118,8 @@ class PipProvider(_ProviderBase):
             # A "bare" requirement without any version requirements.
             return 3
 
-        restrictive = _get_restrictive_rating(req for req, _ in information)
-        key = next(iter(candidates)).name if candidates else ""
-        order = self._user_requested.get(key, float("inf"))
+        rating = _get_restrictive_rating(r for r, _ in information[identifier])
+        order = self._user_requested.get(identifier, float("inf"))
 
         # HACK: Setuptools have a very long and solid backward compatibility
         # track record, and extremely few projects would request a narrow,
@@ -139,9 +129,9 @@ class PipProvider(_ProviderBase):
         # delaying Setuptools helps reduce branches the resolver has to check.
         # This serves as a temporary fix for issues like "apache-airlfow[all]"
         # while we work on "proper" branch pruning techniques.
-        delay_this = key == "setuptools"
+        delay_this = identifier == "setuptools"
 
-        return (delay_this, restrictive, order, key)
+        return (delay_this, rating, order, identifier)
 
     def find_matches(
         self,