Update pipenv from 2020.11.15 to 2023.2.4 (/2022.4.8) (#1407)

Updates Pipenv from 2020.11.15 to:
  - 2022.4.8 for Python 3.6
  - 2023.2.4 for Python 3.7+

Release notes:
https://github.com/pypa/pipenv/blob/main/CHANGELOG.rst#pipenv-202324-2023-02-04

Full changes:
pypa/pipenv@v2020.11.15...v2023.2.4

Closes #1403.
GUS-W-9348641.

Author: edmorley

CHANGELOG.md

@@ -4,6 +4,9 @@
 
 - Python 3.10.10 and 3.11.2 are now available ([#1405](https://github.com/heroku/heroku-buildpack-python/pull/1405)).
 - The default Python version for new apps is now 3.10.10 (previously 3.10.9) ([#1405](https://github.com/heroku/heroku-buildpack-python/pull/1405)).
+- Update Pipenv from 2020.11.15 to: ([#1407](https://github.com/heroku/heroku-buildpack-python/pull/1407))
+  - 2022.4.8 for Python 3.6
+  - 2023.2.4 for Python 3.7+
 - Add a deprecation warning for Python 3.7 ([#1404](https://github.com/heroku/heroku-buildpack-python/pull/1404)).
 
 ## v224 (2022-12-07)

bin/steps/pipenv

@@ -42,13 +42,16 @@ if [ ! "$SKIP_PIPENV_INSTALL" ]; then
             mcount "buildvar.PIP_EXTRA_INDEX_URL"
         fi
 
-        PIPENV_VERSION='2020.11.15'
+        PIPENV_VERSION='2023.2.4'
 
-        # Install pipenv.
-        # Due to weird old pip behavior and pipenv behavior, pipenv upgrades pip
-        # to latest if only --upgrade is specified. Specify upgrade strategy to
-        # avoid this eager behavior.
-        /app/.heroku/python/bin/pip install "pipenv==${PIPENV_VERSION}" --upgrade --upgrade-strategy only-if-needed &> /dev/null
+        case "${PYTHON_VERSION}" in
+            python-3.6.*)
+                # Python 3.6 support was dropped in pipenv 2022.4.20.
+                PIPENV_VERSION='2022.4.8'
+                ;;
+        esac
+
+        /app/.heroku/python/bin/pip install --quiet --disable-pip-version-check --no-cache-dir "pipenv==${PIPENV_VERSION}"
 
         # Install the test dependencies, for CI.
         if [ "$INSTALL_TEST" ]; then

bin/steps/python

@@ -213,7 +213,7 @@ if ! curl --silent --show-error --fail --retry 3 --retry-connrefused --connect-t
   exit 1
 fi
 
-/app/.heroku/python/bin/python "${PIP_WHEEL}/pip" install --quiet --disable-pip-version-check --no-cache \
+/app/.heroku/python/bin/python "${PIP_WHEEL}/pip" install --quiet --disable-pip-version-check --no-cache-dir \
   "${PIP_WHEEL}" "setuptools==${SETUPTOOLS_VERSION}" "wheel==${WHEEL_VERSION}"
 
 hash -r

spec/fixtures/pipenv_and_requirements_txt/Pipfile.lock

@@ -9,4 +9,4 @@ urllib3 = "*"
 [dev-packages]
 
 [requires]
-python_version = "3.8"
+python_version = "3.9"