Revert build_ext changes

setup.py

@@ -8,7 +8,6 @@
 from os.path import join, dirname
 
 from setuptools import setup, find_packages
-from setuptools.command.build_ext import build_ext
 from setuptools.extension import Extension
 
 with open(join(dirname(__file__), 'thriftpy2', '__init__.py'), 'r') as f:
@@ -40,32 +39,32 @@
 ] + tornado_requires
 
 
+cmdclass = {}
+ext_modules = []
+
 # pypy detection
 PYPY = "__pypy__" in sys.modules
 UNIX = platform.system() in ("Linux", "Darwin")
 
-ext_modules = []
+# only build ext in CPython with UNIX platform
 if UNIX and not PYPY:
-    ext_modules = [
-        Extension("thriftpy2.transport.cybase", sources=["thriftpy2/transport/cybase.pyx"]),
-        Extension("thriftpy2.transport.buffered.cybuffered", sources=["thriftpy2/transport/buffered/cybuffered.pyx"]),
-        Extension("thriftpy2.transport.framed.cyframed", sources=["thriftpy2/transport/framed/cyframed.pyx"]),
-        Extension("thriftpy2.transport.memory.cymemory", sources=["thriftpy2/transport/memory/cymemory.pyx"]),
-        Extension("thriftpy2.transport.sasl.cysasl", sources=["thriftpy2/transport/sasl/cysasl.pyx"]),
-        Extension("thriftpy2.protocol.cybin", sources=["thriftpy2/protocol/cybin/cybin.pyx"]),
-    ]
-
-
-class CustomBuildExtCommand(build_ext):
-    """build_ext command for use when Cythonizing."""
-
-    def finalize_options(self):
-        # only build ext in CPython with UNIX platform
-        if self.distribution.ext_modules:
-            from Cython.Build import cythonize
-            self.distribution.ext_modules[:] = cythonize(self.distribution.ext_modules, force=self.force)
-        super().finalize_options()
-
+    from Cython.Build import cythonize
+    cythonize("thriftpy2/transport/cybase.pyx")
+    cythonize("thriftpy2/transport/**/*.pyx")
+    cythonize("thriftpy2/protocol/cybin/cybin.pyx")
+
+    ext_modules.append(Extension("thriftpy2.transport.cybase",
+                                 ["thriftpy2/transport/cybase.c"]))
+    ext_modules.append(Extension("thriftpy2.transport.buffered.cybuffered",
+                                 ["thriftpy2/transport/buffered/cybuffered.c"]))
+    ext_modules.append(Extension("thriftpy2.transport.memory.cymemory",
+                                 ["thriftpy2/transport/memory/cymemory.c"]))
+    ext_modules.append(Extension("thriftpy2.transport.framed.cyframed",
+                                 ["thriftpy2/transport/framed/cyframed.c"]))
+    ext_modules.append(Extension("thriftpy2.transport.sasl.cysasl",
+                                 ["thriftpy2/transport/sasl/cysasl.c"]))
+    ext_modules.append(Extension("thriftpy2.protocol.cybin",
+                                 ["thriftpy2/protocol/cybin/cybin.c"]))
 
 setup(name="thriftpy2",
       version=version,
@@ -89,8 +88,7 @@ def finalize_options(self):
           "dev": dev_requires,
           "tornado": tornado_requires
       },
-      setup_requires=["Cython"],
-      cmdclass={'build_ext': CustomBuildExtCommand},
+      cmdclass=cmdclass,
       ext_modules=ext_modules,
       include_package_data=True,
       classifiers=[