fix(crc32c): Drop support for Python 3.8 and 3.9 (googleapis#16955)

This PR updates \`google-crc32c\` to establish Python 3.10 as the
minimum supported version, dropping support for Python 3.7, 3.8, and
3.9.

### Changes

* Configuration: Updated \`setup.cfg\` and \`pyproject.toml\` to require
Python 3.10+ and remove references to Python 3.8 and 3.9.
* Nox: Updated \`noxfile.py\` to remove Python 3.7, 3.8, and 3.9 from
unit test versions.
* Documentation: Updated \`README.md\` to reflect supported Python
versions and published wheels.

Note: Verification tests were skipped locally due to environment issues
with building the C library in the Docker container, but changes are
strictly metadata and configuration!

Fixes internal issue: http://b/482126936 🦕

Author: chalmerlowe

packages/google-crc32c/README.md

@@ -9,8 +9,8 @@ C toolchain.
 
 # Currently Published Wheels
 
-Wheels are currently published for CPython 3.9, 3.10, 3.11, 3.12, 3.13 and 3.14
-for multiple architectures. PyPy 3.9 and 3.10 are also supported for Linux.
+Wheels are currently published for CPython 3.10, 3.11, 3.12, 3.13 and 3.14
+for multiple architectures. PyPy 3.10 is also supported for Linux.
 For information on building your own wheels please view [BUILDING.md](BUILDING.md).
 
 

packages/google-crc32c/mypy.ini

@@ -1,3 +1,3 @@
 [mypy]
-python_version = 3.9
+python_version = 3.10
 exclude = tests/unit/resources/

packages/google-crc32c/noxfile.py

@@ -25,9 +25,8 @@
 
 # Constants
 DEFAULT_PYTHON_VERSION = "3.14"
-UNIT_TEST_PYTHON_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+UNIT_TEST_PYTHON_VERSIONS = ["3.10", "3.11", "3.12", "3.13", "3.14"]
 ALL_PYTHON = list(UNIT_TEST_PYTHON_VERSIONS)
-ALL_PYTHON.extend(["3.7"])
 
 FLAKE8_VERSION = "flake8==6.1.0"
 BLACK_VERSION = "black[jupyter]==23.7.0"

packages/google-crc32c/pyproject.toml

@@ -21,5 +21,5 @@ name = "google-crc32c"
 version = "1.8.0"
 description = "A python wrapper of the C library 'Google CRC32C'"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.10"
 license = {text = "Apache-2.0"}

packages/google-crc32c/scripts/manylinux/build_on_centos.sh

@@ -48,10 +48,7 @@ if [[ -z ${BUILD_PYTHON} ]]; then
     # Collect all target Python versions.
     for PYTHON_BIN in /opt/python/*/bin; do
         # H/T: https://stackoverflow.com/a/229606/1068170
-        if [[ "${PYTHON_BIN}" == *"39"* ]]; then
-            PYTHON_VERSIONS="${PYTHON_VERSIONS} ${PYTHON_BIN}"
-            continue
-        elif [[ "${PYTHON_BIN}" == *"310"* ]]; then
+        if [[ "${PYTHON_BIN}" == *"310"* ]]; then
             PYTHON_VERSIONS="${PYTHON_VERSIONS} ${PYTHON_BIN}"
             continue
         elif [[ "${PYTHON_BIN}" == *"311"* ]]; then

packages/google-crc32c/scripts/osx/build.sh

@@ -41,7 +41,7 @@ ${OSX_DIR}/build_c_lib.sh
 rm -rf /Users/kbuilder/.pyenv
 git clone https://github.com/pyenv/pyenv.git /Users/kbuilder/.pyenv
 
-SUPPORTED_PYTHON_VERSIONS=("3.9" "3.10" "3.11" "3.12" "3.13" "3.14")
+SUPPORTED_PYTHON_VERSIONS=("3.10" "3.11" "3.12" "3.13" "3.14")
 
 for PYTHON_VERSION in ${SUPPORTED_PYTHON_VERSIONS[@]}; do
     echo "Build wheel for Python ${PYTHON_VERSION}"

packages/google-crc32c/scripts/osx/publish_python_wheel.sh

@@ -15,11 +15,11 @@
 
 set -eo pipefail
 
-if [ -z "$(pyenv versions --bare | grep 3.8)" ]; then
-    echo "Python 3.8 is not installed. Installing..."
-    pyenv install 3.8
+if [ -z "$(pyenv versions --bare | grep 3.10)" ]; then
+    echo "Python 3.10 is not installed. Installing..."
+    pyenv install 3.10
 fi
-pyenv shell 3.8
+pyenv shell 3.10
 
 python -m pip install "setuptools<71"
 

packages/google-crc32c/setup.cfg

@@ -29,8 +29,6 @@ classifiers =
     Intended Audience :: Developers
     Operating System :: OS Independent
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
@@ -39,7 +37,7 @@ classifiers =
 
 [options]
 zip_safe = True
-python_requires = >=3.8
+python_requires = >=3.10
 
 [options.extras_require]
 testing = pytest

packages/google-crc32c/setup.py

@@ -104,9 +104,7 @@ def build_c_extension():
         package_dir={"": "src"},
         ext_modules=[module],
         cmdclass={"build_ext": BuildExtWithDLL},
-        install_requires=[
-            "importlib_resources>=1.3 ; python_version < '3.9' and os_name == 'nt'"
-        ],
+        install_requires=[],
     )
 
 

packages/google-crc32c/src/google_crc32c/__config__.py

@@ -30,7 +30,6 @@ def modify_path():
 
         extra_dll_dir = str(_resources_files("google_crc32c") / "extra-dll")
         if os.path.isdir(extra_dll_dir):
-            # Python 3.8+ uses add_dll_directory.
             os.add_dll_directory(extra_dll_dir)
     except ImportError:
         pass