move get-pip to s3

Author: CaseyFaist

bin/steps/python

@@ -97,6 +97,15 @@ if [ ! "$SKIP_INSTALL" ]; then
   hash -r
 fi
 
+# Heroku uses the get-pip utility maintained by the Python community to vendor Pip.
+# https://github.com/pypa/get-pip
+GETPIP="https://lang-python.s3.amazonaws.com/etc/get-pip.py"
+
+if ! curl "${GETPIP}" -o "$ROOT_DIR/get-pip.py"; then
+    mcount "failure.python.get-pip"
+    echo "Failed to pull down get-pip"
+    exit 1
+fi
 
 # If Pip isn't up to date:
 if [ "$FRESH_PYTHON" ] || [[ ! $(pip --version) == *$PIP_UPDATE* ]]; then
@@ -107,7 +116,7 @@ if [ "$FRESH_PYTHON" ] || [[ ! $(pip --version) == *$PIP_UPDATE* ]]; then
   rm -fr /app/.heroku/python/lib/python*/site-packages/pip-*
   rm -fr /app/.heroku/python/lib/python*/site-packages/setuptools-*
 
-  /app/.heroku/python/bin/python "$ROOT_DIR/vendor/get-pip.py" pip=="$PIP_UPDATE" &> /dev/null
+  /app/.heroku/python/bin/python "$ROOT_DIR/get-pip.py" pip=="$PIP_UPDATE" &> /dev/null
   /app/.heroku/python/bin/pip install "$ROOT_DIR/vendor/setuptools-39.0.1-py2.py3-none-any.whl" &> /dev/null
 fi