review comment: renamed and moved up ExtrasCandidate._ireq

Author: sanderr

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

@@ -427,10 +427,11 @@ def __init__(
         self,
         base: BaseCandidate,
         extras: FrozenSet[str],
-        ireq: Optional[InstallRequirement] = None,
+        *,
+        comes_from: Optional[InstallRequirement] = None,
     ) -> None:
         """
-        :param ireq: the InstallRequirement that led to this candidate, if it
+        :param ireq: the InstallRequirement that led to this candidate if it
             differs from the base's InstallRequirement. This will often be the
             case in the sense that this candidate's requirement has the extras
             while the base's does not. Unlike the InstallRequirement backed
@@ -439,7 +440,7 @@ def __init__(
         """
         self.base = base
         self.extras = extras
-        self._ireq = ireq
+        self._comes_from = comes_from if comes_from is not None else self.base._ireq
 
     def __str__(self) -> str:
         name, rest = str(self.base).split(" ", 1)
@@ -514,7 +515,7 @@ def iter_dependencies(self, with_requires: bool) -> Iterable[Optional[Requiremen
         for r in self.base.dist.iter_dependencies(valid_extras):
             yield from factory.make_requirements_from_spec(
                 str(r),
-                self._ireq if self._ireq is not None else self.base._ireq,
+                self._comes_from,
                 valid_extras,
             )
 

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

@@ -142,13 +142,14 @@ def _make_extras_candidate(
         self,
         base: BaseCandidate,
         extras: FrozenSet[str],
-        ireq: Optional[InstallRequirement] = None,
+        *,
+        comes_from: Optional[InstallRequirement] = None,
     ) -> ExtrasCandidate:
         cache_key = (id(base), extras)
         try:
             candidate = self._extras_candidate_cache[cache_key]
         except KeyError:
-            candidate = ExtrasCandidate(base, extras, ireq=ireq)
+            candidate = ExtrasCandidate(base, extras, comes_from=comes_from)
             self._extras_candidate_cache[cache_key] = candidate
         return candidate
 
@@ -165,7 +166,7 @@ def _make_candidate_from_dist(
             self._installed_candidate_cache[dist.canonical_name] = base
         if not extras:
             return base
-        return self._make_extras_candidate(base, extras, ireq=template)
+        return self._make_extras_candidate(base, extras, comes_from=template)
 
     def _make_candidate_from_link(
         self,
@@ -227,7 +228,7 @@ def _make_candidate_from_link(
 
         if not extras:
             return base
-        return self._make_extras_candidate(base, extras, ireq=template)
+        return self._make_extras_candidate(base, extras, comes_from=template)
 
     def _iter_found_candidates(
         self,