Add support for Python 3.8.8 and 3.9.2

https://www.python.org/downloads/release/python-388/
https://www.python.org/downloads/release/python-392/

Closes GUS-W-8159179.
Closes GUS-W-8513391.

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Python 3.8.8 and 3.9.2 are now available (CPython) ([#1178](https://github.com/heroku/heroku-buildpack-python/pull/1178)).
 
 ## v190 (2021-02-16)
 

README.md

@@ -60,8 +60,8 @@ Specify a Python Runtime
 
 Supported runtime options include:
 
-- `python-3.9.1`
-- `python-3.8.7`
+- `python-3.9.2`
+- `python-3.8.8`
 - `python-3.7.10`
 - `python-3.6.13`
 - `python-2.7.18`

bin/default_pythons

@@ -5,8 +5,8 @@
 # the env vars to subprocesses.
 # shellcheck disable=2034
 
-LATEST_39="python-3.9.1"
-LATEST_38="python-3.8.7"
+LATEST_39="python-3.9.2"
+LATEST_38="python-3.8.8"
 LATEST_37="python-3.7.10"
 LATEST_36="python-3.6.13"
 LATEST_35="python-3.5.10"

builds/runtimes/python-3.8.8

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+
+source $(dirname $0)/python3

builds/runtimes/python-3.9.2

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+
+source $(dirname $0)/python3

spec/fixtures/pipenv_and_runtime_txt/runtime.txt

@@ -1 +1 @@
-python-3.9.1
+python-3.9.2

spec/fixtures/python_3.8/runtime.txt

@@ -1 +1 @@
-python-3.8.7
+python-3.8.8

spec/fixtures/python_3.9/runtime.txt

@@ -1 +1 @@
-python-3.9.1
+python-3.9.2

spec/fixtures/runtime_txt_only/runtime.txt

@@ -1 +1 @@
-python-3.9.1
+python-3.9.2

spec/fixtures/runtime_txt_with_stray_whitespace/runtime.txt

@@ -1,3 +1,3 @@
 
- python-3.9.1 
+ python-3.9.2 
 

spec/hatchet/pipenv_spec.rb

@@ -131,7 +131,21 @@
   context 'with a Pipfile.lock containing python_full_version 3.9.1' do
     let(:app) { Hatchet::Runner.new('spec/fixtures/pipenv_python_full_version') }
 
-    include_examples 'builds using Pipenv with the requested Python version', '3.9.1'
+    it 'builds with the outdated Python version specified' do
+      app.deploy do |app|
+        expect(clean_output(app.output)).to match(Regexp.new(<<~REGEX))
+          remote: -----> Python app detected
+          remote:  !     Python has released a security update! Please consider upgrading to python-#{LATEST_PYTHON_3_9}
+          remote:        Learn More: https://devcenter.heroku.com/articles/python-runtimes
+          remote: cp: cannot stat '/tmp/build_.*/requirements.txt': No such file or directory
+          remote: -----> Installing python-3.9.1
+          remote: -----> Installing pip 20.1.1, setuptools 47.1.1 and wheel 0.34.2
+          remote: -----> Installing dependencies with Pipenv 2020.11.15
+          remote:        Installing dependencies from Pipfile.lock \\(e13df1\\)...
+          remote: -----> Installing SQLite3
+        REGEX
+      end
+    end
   end
 
   context 'with a Pipfile.lock containing an invalid python_version',

spec/hatchet/python_version_spec.rb

@@ -160,13 +160,13 @@
     include_examples 'builds with the requested Python version', LATEST_PYTHON_3_7
   end
 
-  context 'when runtime.txt contains python-3.8.7' do
+  context 'when runtime.txt contains python-3.8.8' do
     let(:app) { Hatchet::Runner.new('spec/fixtures/python_3.8') }
 
     include_examples 'builds with the requested Python version', LATEST_PYTHON_3_8
   end
 
-  context 'when runtime.txt contains python-3.9.1' do
+  context 'when runtime.txt contains python-3.9.2' do
     let(:app) { Hatchet::Runner.new('spec/fixtures/python_3.9') }
 
     include_examples 'builds with the requested Python version', LATEST_PYTHON_3_9

spec/spec_helper.rb

@@ -11,8 +11,8 @@
 LATEST_PYTHON_3_5 = '3.5.10'
 LATEST_PYTHON_3_6 = '3.6.13'
 LATEST_PYTHON_3_7 = '3.7.10'
-LATEST_PYTHON_3_8 = '3.8.7'
-LATEST_PYTHON_3_9 = '3.9.1'
+LATEST_PYTHON_3_8 = '3.8.8'
+LATEST_PYTHON_3_9 = '3.9.2'
 LATEST_PYPY_2_7 = '7.3.2'
 LATEST_PYPY_3_6 = '7.3.2'
 DEFAULT_PYTHON_VERSION = LATEST_PYTHON_3_6