def build_extension()

in setup.py [0:0]
30 lines of code
4 McCabe index (conditional complexity)

    def build_extension(self, ext):
        source_path = pathlib.Path(__file__).parent.resolve()
        output_path = (
            pathlib.Path(self.get_ext_fullpath(ext.name))
            .parent.joinpath("libtorchbeast")
            .resolve()
        )

        os.makedirs(self.build_temp, exist_ok=True)

        build_type = "Debug" if self.debug else "Release"
        generator = "Ninja" if spawn.find_executable("ninja") else "Unix Makefiles"

        cmake_cmd = [
            "cmake",
            str(source_path),
            "-G%s" % generator,
            "-DPYTHON_SRC_PARENT=%s" % source_path,
            "-DPYTHON_EXECUTABLE=%s" % sys.executable,
            "-DPYTHON_INCLUDE_DIR=%s" % sysconfig.get_python_inc(),
            "-DPYTHON_LIBRARY=%s" % sysconfig.get_config_var("LIBDIR"),
            "-DCMAKE_BUILD_TYPE=%s" % build_type,
            "-DCMAKE_INSTALL_PREFIX=%s" % sys.base_prefix,
            "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=%s" % output_path,
        ]

        build_cmd = ["cmake", "--build", ".", "--parallel"]
        install_cmd = build_cmd + ["--target", "install"]

        try:
            subprocess.check_call(cmake_cmd, cwd=self.build_temp)
            subprocess.check_call(build_cmd, cwd=self.build_temp)
            subprocess.check_call(install_cmd, cwd=self.build_temp)
        except subprocess.CalledProcessError:
            # Don't obscure the error with a setuptools backtrace.
            sys.exit(1)