Add support for Python 3.9.8 (#1263)

https://blog.python.org/2021/11/python-398-and-3110a2-are-now-available.html
https://www.python.org/downloads/release/python-398/
https://docs.python.org/release/3.9.8/whatsnew/changelog.html#python-3-9-8-final

Of note, the build of this version uses the new compiler options first used for the
Python 3.10.0 release on Heroku. See #1246 for more details.

GUS-W-9093279.

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- Python 3.9.8 is now available ([#1263](https://github.com/heroku/heroku-buildpack-python/pull/1263)).
+- The default Python version for new apps is now 3.9.8 (previously 3.9.7) ([#1263](https://github.com/heroku/heroku-buildpack-python/pull/1263)).
 
 ## v202 (2021-11-01)
 

README.md

@@ -42,7 +42,7 @@ A `requirements.txt` must be present at the root of your application's repositor
 
 To specify your python version, you also need a `runtime.txt` file - unless you are using the default Python runtime version.
 
-Current default Python Runtime: Python 3.9.7
+Current default Python Runtime: Python 3.9.8
 
 Alternatively, you can provide a `setup.py` file, or a `Pipfile`.
 Using `pipenv` will generate `runtime.txt` at build time if one of the field `python_version` or `python_full_version` is specified in the `requires` section of your `Pipfile`.
@@ -61,7 +61,7 @@ Specify a Python Runtime
 Supported runtime options include:
 
 - `python-3.10.0`
-- `python-3.9.7`
+- `python-3.9.8`
 - `python-3.8.12`
 - `python-3.7.12`
 - `python-3.6.15`

bin/default_pythons

@@ -6,7 +6,7 @@
 # shellcheck disable=2034
 
 LATEST_310="python-3.10.0"
-LATEST_39="python-3.9.7"
+LATEST_39="python-3.9.8"
 LATEST_38="python-3.8.12"
 LATEST_37="python-3.7.12"
 LATEST_36="python-3.6.15"

builds/runtimes/python-3.9.8

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

builds/runtimes/python3-new

@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 
 # This file will eventually be merged into the main `python3` build script,
-# however for Python 3.10 we are using some new configure options that we wish
-# to trial only in the Python 3.10 builds first.
+# however for Python 3.9/3.10 we are using some new configure options that we wish
+# to trial only in new Python builds first.
 
 set -euo pipefail
 

spec/fixtures/pipenv_and_runtime_txt/runtime.txt

@@ -1 +1 @@
-python-3.9.7
+python-3.9.8

spec/fixtures/python_3.9/runtime.txt

@@ -1 +1 @@
-python-3.9.7
+python-3.9.8

spec/fixtures/runtime_txt_only/runtime.txt

@@ -1 +1 @@
-python-3.9.7
+python-3.9.8

spec/fixtures/runtime_txt_with_stray_whitespace/runtime.txt

@@ -1,3 +1,3 @@
 
- python-3.9.7 
+ python-3.9.8 
 

spec/hatchet/python_version_spec.rb

@@ -187,7 +187,7 @@
     include_examples 'builds with the requested Python version', LATEST_PYTHON_3_8
   end
 
-  context 'when runtime.txt contains python-3.9.7' do
+  context 'when runtime.txt contains python-3.9.8' do
     let(:app) { Hatchet::Runner.new('spec/fixtures/python_3.9') }
 
     include_examples 'builds with the requested Python version', LATEST_PYTHON_3_9

spec/hatchet/stack_spec.rb

@@ -54,6 +54,7 @@
           remote: -----> No Python version was specified. Using the same version as the last build: python-#{DEFAULT_PYTHON_VERSION}
           remote:        To use a different version, see: https://devcenter.heroku.com/articles/python-runtimes
           remote: python: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by python)
+          remote: python: /lib/x86_64-linux-gnu/libpthread.so.0: version `GLIBC_2.30' not found (required by python)
           remote: python: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.28' not found (required by python)
           remote: -----> Stack has changed from heroku-20 to heroku-18, clearing cache
           remote: -----> No change in requirements detected, installing from cache

spec/spec_helper.rb

@@ -12,7 +12,7 @@
 LATEST_PYTHON_3_6 = '3.6.15'
 LATEST_PYTHON_3_7 = '3.7.12'
 LATEST_PYTHON_3_8 = '3.8.12'
-LATEST_PYTHON_3_9 = '3.9.7'
+LATEST_PYTHON_3_9 = '3.9.8'
 LATEST_PYTHON_3_10 = '3.10.0'
 LATEST_PYPY_2_7 = '7.3.2'
 LATEST_PYPY_3_6 = '7.3.2'