From c44b1f98e7c3f82f938261dd265abeea1855e705 Mon Sep 17 00:00:00 2001
From: Vitya Alexandrov <vitya.alexandrov@gmail.com>
Date: Thu, 8 Oct 2020 08:54:09 -0700
Subject: [PATCH 1/3] manual override of pip version for pipenv users (PR)

Allow for a manual override of pip version for pipenv users (PR)
https://github.com/heroku/heroku-buildpack-python/issues/1093
---
 bin/steps/python | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/bin/steps/python b/bin/steps/python
index 45d34e6eb..e7d29f92e 100755
--- a/bin/steps/python
+++ b/bin/steps/python
@@ -179,7 +179,12 @@ if [[ -f "$BUILD_DIR/Pipfile" ]]; then
   # The buildpack is pinned to old pipenv, which requires older pip.
   # Pip 9.0.2 doesn't support installing itself from a wheel, so we have to use split
   # versions here (ie: installer pip version different from target pip version).
-  PIP_VERSION='9.0.2'
+  if [ -z "$PIP_VERSION_OVERRIDE" ]
+    then
+      PIP_VERSION='9.0.2'
+    else
+      PIP_VERSION=PIP_VERSION_OVERRIDE
+  fi
   PIP_TO_INSTALL="pip==${PIP_VERSION}"
 else
   PIP_TO_INSTALL="${PIP_WHEEL}"

From 83df26e996ca49d230eaff7aee544c4f3b6f90d5 Mon Sep 17 00:00:00 2001
From: Vitya Alexandrov <vitya.alexandrov@gmail.com>
Date: Thu, 8 Oct 2020 09:01:01 -0700
Subject: [PATCH 2/3] Update CHANGELOG.md

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5b4b0dbd..d04657256 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Unreleased
 
 - Add support for Heroku-20 (#968).
+- allow pipenv users to specify pip version via `PIP_VERSION_OVERRIDE` variable (#1094)
 
 ## v182 (2020-10-06)
 

From abb9394a65316388554f6cfd2bfa3834cd40ec6b Mon Sep 17 00:00:00 2001
From: Vitya Alexandrov <vitya.alexandrov@gmail.com>
Date: Thu, 8 Oct 2020 09:02:13 -0700
Subject: [PATCH 3/3] style formatting

---
 CHANGELOG.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d04657256..f029b4cab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 ## Unreleased
 
 - Add support for Heroku-20 (#968).
-- allow pipenv users to specify pip version via `PIP_VERSION_OVERRIDE` variable (#1094)
+- Allow pipenv users to specify pip version via `PIP_VERSION_OVERRIDE` variable (#1094)
 
 ## v182 (2020-10-06)