git actions: fail build if extensions aren't built

we run running again and again into situation our wheels are missing
some of the part we expect cause of extensions silently failing

with this change we can stop the builds cause of that, and attend to it

Author: fruch

.github/workflows/build-push.yml

@@ -12,7 +12,7 @@ env:
  CIBW_TEST_COMMAND_WINDOWS: "pytest {project}/tests/unit  -k \"not (test_deserialize_date_range_year or test_datetype or test_libevreactor)\" "
  CIBW_BEFORE_TEST: "pip install -r {project}/test-requirements.txt"
  CIBW_BEFORE_BUILD_LINUX: "rm -rf ~/.pyxbld && rpm --import https://repo.almalinux.org/almalinux/RPM-GPG-KEY-AlmaLinux && yum install -y libffi-devel libev libev-devel openssl openssl-devel"
- CIBW_ENVIRONMENT: "CASS_DRIVER_BUILD_CONCURRENCY=2 CFLAGS='-g0 -O3'"
+ CIBW_ENVIRONMENT: "CASS_DRIVER_BUILD_CONCURRENCY=2 CASS_DRIVER_BUILD_EXTENSIONS_ARE_MUST=yes CFLAGS='-g0 -O3'"
  CIBW_SKIP: cp36* cp37* pp*i686 *musllinux*
  CIBW_MANYLINUX_X86_64_IMAGE: manylinux_2_28
  CIBW_MANYLINUX_PYPY_X86_64_IMAGE: manylinux_2_28

setup.py

@@ -204,7 +204,7 @@ def __init__(self, ext):
 sys.argv = [a for a in sys.argv if a not in ("--no-murmur3", "--no-libev", "--no-cython", "--no-extensions")]
 
 build_concurrency = int(os.environ.get('CASS_DRIVER_BUILD_CONCURRENCY', '0'))
-
+CASS_DRIVER_BUILD_EXTENSIONS_ARE_MUST = bool(os.environ.get('CASS_DRIVER_BUILD_EXTENSIONS_ARE_MUST', 'no') == 'yes')
 
 class NoPatchExtension(Extension):
 
@@ -284,6 +284,9 @@ def run(self):
         except DistutilsPlatformError as exc:
             sys.stderr.write('%s\n' % str(exc))
             warnings.warn(self.error_message % "C extensions.")
+            if CASS_DRIVER_BUILD_EXTENSIONS_ARE_MUST:
+                raise
+
 
     def build_extensions(self):
         if build_concurrency > 1:
@@ -302,6 +305,8 @@ def build_extension(self, ext):
             sys.stderr.write('%s\n' % str(exc))
             name = "The %s extension" % (ext.name,)
             warnings.warn(self.error_message % (name,))
+            if CASS_DRIVER_BUILD_EXTENSIONS_ARE_MUST:
+                raise
 
     def _setup_extensions(self):
         # We defer extension setup until this command to leveraage 'setup_requires' pulling in Cython before we
@@ -325,13 +330,14 @@ def _setup_extensions(self):
                                extra_compile_args=compile_args)
                         for m in cython_candidates],
                     nthreads=build_concurrency,
-                    exclude_failures=True))
+                    exclude_failures=not CASS_DRIVER_BUILD_EXTENSIONS_ARE_MUST))
 
                 self.extensions.extend(cythonize(NoPatchExtension("*", ["cassandra/*.pyx"], extra_compile_args=compile_args),
                                                  nthreads=build_concurrency))
             except Exception:
                 sys.stderr.write("Failed to cythonize one or more modules. These will not be compiled as extensions (optional).\n")
-
+                if CASS_DRIVER_BUILD_EXTENSIONS_ARE_MUST:
+                    raise
 
 def pre_build_check():
     """