From 515a222cc451c2b7d656f702c6a396c0e6ec407d Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Thu, 22 Aug 2019 19:31:17 +0200
Subject: [PATCH] Upgrade to pip 19.1.1 for Python 3.4 projects

Python 3.4 support was dropped in pip >= 19.2. For projects still on
this Python version, use pip 19.1.1 instead of pip 19.2.1.
---
 bin/compile | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/bin/compile b/bin/compile
index fc3d82f..5a0292e 100755
--- a/bin/compile
+++ b/bin/compile
@@ -64,6 +64,19 @@ DEFAULT_PYTHON_STACK="cedar-14"
 # If pip doesn't match this version (the version we install), run the installer.
 PIP_UPDATE="19.2.3"
 
+for file in "$BUILD_DIR/runtime.txt" "$CACHE_DIR/.heroku/python-version" ; do
+    [ -f "$file" ] || continue
+
+    version=$(tr -d '[:space:]' < "$file")
+
+    case "$version" in "$PY34"*)
+        # Python 3.4 support was dropped in pip >= 19.2.
+        PIP_UPDATE="19.1.1"
+        break
+        ;;
+    esac
+done
+
 export DEFAULT_PYTHON_STACK PIP_UPDATE
 export PY37 PY36 PY35 PY27 PY34