From 806067f09f6a6e0fd605728e0914a986dd4f936f Mon Sep 17 00:00:00 2001
From: Tzu-ping Chung <uranusjr@gmail.com>
Date: Fri, 24 Apr 2020 18:53:56 +0800
Subject: [PATCH] Move yanked link warning into the legacy resolver

---
 src/pip/_internal/index/package_finder.py       | 16 ----------------
 src/pip/_internal/resolution/legacy/resolver.py | 17 ++++++++++++++++-
 2 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/src/pip/_internal/index/package_finder.py b/src/pip/_internal/index/package_finder.py
index 98a6acaab..441992b92 100644
--- a/src/pip/_internal/index/package_finder.py
+++ b/src/pip/_internal/index/package_finder.py
@@ -556,23 +556,7 @@ class CandidateEvaluator(object):
         """
         if not candidates:
             return None
-
         best_candidate = max(candidates, key=self._sort_key)
-
-        # Log a warning per PEP 592 if necessary before returning.
-        link = best_candidate.link
-        if link.is_yanked:
-            reason = link.yanked_reason or '<none given>'
-            msg = (
-                # Mark this as a unicode string to prevent
-                # "UnicodeEncodeError: 'ascii' codec can't encode character"
-                # in Python 2 when the reason contains non-ascii characters.
-                u'The candidate selected for download or install is a '
-                'yanked version: {candidate}\n'
-                'Reason for being yanked: {reason}'
-            ).format(candidate=best_candidate, reason=reason)
-            logger.warning(msg)
-
         return best_candidate
 
     def compute_best_candidate(
diff --git a/src/pip/_internal/resolution/legacy/resolver.py b/src/pip/_internal/resolution/legacy/resolver.py
index 3cf68bbd2..2854e2103 100644
--- a/src/pip/_internal/resolution/legacy/resolver.py
+++ b/src/pip/_internal/resolution/legacy/resolver.py
@@ -267,7 +267,22 @@ class Resolver(BaseResolver):
         best_candidate = self.finder.find_requirement(req, upgrade)
         if not best_candidate:
             return None
-        return best_candidate.link
+
+        # Log a warning per PEP 592 if necessary before returning.
+        link = best_candidate.link
+        if link.is_yanked:
+            reason = link.yanked_reason or '<none given>'
+            msg = (
+                # Mark this as a unicode string to prevent
+                # "UnicodeEncodeError: 'ascii' codec can't encode character"
+                # in Python 2 when the reason contains non-ascii characters.
+                u'The candidate selected for download or install is a '
+                'yanked version: {candidate}\n'
+                'Reason for being yanked: {reason}'
+            ).format(candidate=best_candidate, reason=reason)
+            logger.warning(msg)
+
+        return link
 
     def _populate_link(self, req):
         # type: (InstallRequirement) -> None