From c07ef581e729ea26110afeed5f084d3162a87f1f Mon Sep 17 00:00:00 2001
From: Pradyun Gedam <pradyunsg@users.noreply.github.com>
Date: Thu, 10 Sep 2020 17:15:32 +0530
Subject: [PATCH 1/5] Factor out logger.into into a single call

This makes it easier to conditionally print this information.
---
 src/pip/_internal/operations/prepare.py | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/pip/_internal/operations/prepare.py b/src/pip/_internal/operations/prepare.py
index 5eb71ce073f..95ffec562dc 100644
--- a/src/pip/_internal/operations/prepare.py
+++ b/src/pip/_internal/operations/prepare.py
@@ -373,12 +373,15 @@ def _download_should_save(self):
 
     def _log_preparing_link(self, req):
         # type: (InstallRequirement) -> None
-        """Log the way the link prepared."""
+        """Provide context for the requirement being prepared."""
         if req.link.is_file:
-            path = req.link.file_path
-            logger.info('Processing %s', display_path(path))
+            message = "Processing %s"
+            information = str(display_path(req.link.file_path))
         else:
-            logger.info('Collecting %s', req.req or req)
+            message = "Collecting %s"
+            information = str(req.req or req)
+
+        logger.info(message, information)
 
     def _get_download_dir(self, link):
         # type: (Link) -> Optional[str]

From 963e390abe3c7ac00c90a189b3557981e92f5dde Mon Sep 17 00:00:00 2001
From: Pradyun Gedam <pradyunsg@users.noreply.github.com>
Date: Thu, 10 Sep 2020 17:21:04 +0530
Subject: [PATCH 2/5] Improve how cached wheels are presented

This is specifically for the case of look ups done in the new resolver.
---
 src/pip/_internal/operations/prepare.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/pip/_internal/operations/prepare.py b/src/pip/_internal/operations/prepare.py
index 95ffec562dc..756adfa43e5 100644
--- a/src/pip/_internal/operations/prepare.py
+++ b/src/pip/_internal/operations/prepare.py
@@ -374,7 +374,7 @@ def _download_should_save(self):
     def _log_preparing_link(self, req):
         # type: (InstallRequirement) -> None
         """Provide context for the requirement being prepared."""
-        if req.link.is_file:
+        if req.link.is_file and not req.original_link_is_in_wheel_cache:
             message = "Processing %s"
             information = str(display_path(req.link.file_path))
         else:
@@ -383,6 +383,10 @@ def _log_preparing_link(self, req):
 
         logger.info(message, information)
 
+        if req.original_link_is_in_wheel_cache:
+            with indent_log():
+                logger.info("Using cached %s", req.link.filename)
+
     def _get_download_dir(self, link):
         # type: (Link) -> Optional[str]
         if link.is_wheel and self.wheel_download_dir:

From 3d32960c80ffed7946d84c636318153619fa5bf6 Mon Sep 17 00:00:00 2001
From: Pradyun Gedam <pradyunsg@users.noreply.github.com>
Date: Thu, 10 Sep 2020 17:21:42 +0530
Subject: [PATCH 3/5] Only Print "Collecting ..." when the requirement changes

---
 src/pip/_internal/operations/prepare.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/pip/_internal/operations/prepare.py b/src/pip/_internal/operations/prepare.py
index 756adfa43e5..6f899e6ff12 100644
--- a/src/pip/_internal/operations/prepare.py
+++ b/src/pip/_internal/operations/prepare.py
@@ -357,6 +357,9 @@ def __init__(
         # Memoized downloaded files, as mapping of url: (path, mime type)
         self._downloaded = {}  # type: Dict[str, Tuple[str, str]]
 
+        # Previous "header" printed for a link-based InstallRequirement
+        self._previous_requirement_header = None
+
     @property
     def _download_should_save(self):
         # type: () -> bool
@@ -381,7 +384,9 @@ def _log_preparing_link(self, req):
             message = "Collecting %s"
             information = str(req.req or req)
 
-        logger.info(message, information)
+        if (message, information) != self._previous_requirement_header:
+            self._previous_requirement_header = (message, information)
+            logger.info(message, information)
 
         if req.original_link_is_in_wheel_cache:
             with indent_log():

From cc472fd54ae4cc860b014fcb23378ba73a538a3d Mon Sep 17 00:00:00 2001
From: Pradyun Gedam <pradyunsg@users.noreply.github.com>
Date: Thu, 10 Sep 2020 17:32:58 +0530
Subject: [PATCH 4/5] Use a symmetric type and make mypy happy

---
 src/pip/_internal/operations/prepare.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pip/_internal/operations/prepare.py b/src/pip/_internal/operations/prepare.py
index 6f899e6ff12..bf89091aa94 100644
--- a/src/pip/_internal/operations/prepare.py
+++ b/src/pip/_internal/operations/prepare.py
@@ -358,7 +358,7 @@ def __init__(
         self._downloaded = {}  # type: Dict[str, Tuple[str, str]]
 
         # Previous "header" printed for a link-based InstallRequirement
-        self._previous_requirement_header = None
+        self._previous_requirement_header = ("", "")
 
     @property
     def _download_should_save(self):

From 0fc1044ff44a83b3c4f5ed340217c940def6ad37 Mon Sep 17 00:00:00 2001
From: Pradyun Gedam <pradyunsg@users.noreply.github.com>
Date: Wed, 16 Sep 2020 17:49:15 +0530
Subject: [PATCH 5/5] :newspaper:

---
 news/8861.bugfix | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 news/8861.bugfix

diff --git a/news/8861.bugfix b/news/8861.bugfix
new file mode 100644
index 00000000000..d623419fae5
--- /dev/null
+++ b/news/8861.bugfix
@@ -0,0 +1 @@
+Tweak the output during dependency resolution in the new resolver.