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"""Build optional cython modules."""

import logging

import os

from distutils.command.build_ext import build_ext

from typing import Any

try:

from setuptools import Extension

except ImportError:

from distutils.core import Extension

_LOGGER = logging.getLogger(__name__)

TO_CYTHONIZE = [

"src/zeroconf/_dns.py",

"src/zeroconf/_cache.py",

"src/zeroconf/_history.py",

"src/zeroconf/_record_update.py",

"src/zeroconf/_listener.py",

"src/zeroconf/_protocol/incoming.py",

"src/zeroconf/_protocol/outgoing.py",

"src/zeroconf/_handlers/answers.py",

"src/zeroconf/_handlers/record_manager.py",

"src/zeroconf/_handlers/multicast_outgoing_queue.py",

"src/zeroconf/_handlers/query_handler.py",

"src/zeroconf/_services/__init__.py",

"src/zeroconf/_services/browser.py",

"src/zeroconf/_services/info.py",

"src/zeroconf/_services/registry.py",

"src/zeroconf/_updates.py",

"src/zeroconf/_utils/ipaddress.py",

"src/zeroconf/_utils/time.py",

]

EXTENSIONS = [

Extension(

ext.removeprefix("src/").removesuffix(".py").replace("/", "."),

[ext],

language="c",

extra_compile_args=["-O3", "-g0"],

)

for ext in TO_CYTHONIZE

]

class BuildExt(build_ext):

def build_extensions(self) -> None:

try:

super().build_extensions()

except Exception:

_LOGGER.info("Failed to build cython extensions")

def build(setup_kwargs: Any) -> None:

if os.environ.get("SKIP_CYTHON", False):

return

try:

from Cython.Build import cythonize

setup_kwargs.update(

{

"ext_modules": cythonize(

EXTENSIONS,

compiler_directives={"language_level": "3"}, # Python 3

),

"cmdclass": {"build_ext": BuildExt},

}

)

setup_kwargs["exclude_package_data"] = {pkg: ["*.c"] for pkg in setup_kwargs["packages"]}

except Exception:

if os.environ.get("REQUIRE_CYTHON"):

raise