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import sys

vi = sys.version_info

if vi < (3, 8):

raise RuntimeError('uvloop requires Python 3.8 or greater')

if sys.platform in ('win32', 'cygwin', 'cli'):

raise RuntimeError('uvloop does not support Windows at the moment')

import os

import os.path

import pathlib

import platform

import re

import shlex

import shutil

import subprocess

import sys

from setuptools import setup, Extension

from setuptools.command.build_ext import build_ext

from setuptools.command.sdist import sdist

CYTHON_DEPENDENCY = 'Cython~=3.1'

MACHINE = platform.machine()

MODULES_CFLAGS = shlex.split(os.getenv('UVLOOP_OPT_CFLAGS', '-O2'))

_ROOT = pathlib.Path(__file__).parent

LIBUV_DIR = str(_ROOT / 'vendor' / 'libuv')

LIBUV_BUILD_DIR = str(_ROOT / 'build' / 'libuv-{}'.format(MACHINE))

def _libuv_build_env():

env = os.environ.copy()

cur_cflags = env.get('CFLAGS', '')

if not re.search(r'-O\d', cur_cflags):

cur_cflags += ' -O2'

env['CFLAGS'] = (cur_cflags + ' -fPIC ' + env.get('ARCHFLAGS', ''))

return env

def _libuv_autogen(env):

if os.path.exists(os.path.join(LIBUV_DIR, 'configure')):

# No need to use autogen, the configure script is there.

return

if not os.path.exists(os.path.join(LIBUV_DIR, 'autogen.sh')):

raise RuntimeError(

'the libuv submodule has not been checked out; '

'try running "git submodule init; git submodule update"')

subprocess.run(

['/bin/sh', 'autogen.sh'], cwd=LIBUV_DIR, env=env, check=True)

class uvloop_sdist(sdist):

def run(self):

# Make sure sdist archive contains configure

# to avoid the dependency on autotools.

_libuv_autogen(_libuv_build_env())

super().run()

class uvloop_build_ext(build_ext):

user_options = build_ext.user_options + [

('cython-always', None,

'run cythonize() even if .c files are present'),

('cython-annotate', None,

'Produce a colorized HTML version of the Cython source.'),

('cython-directives=', None,

'Cythion compiler directives'),

('use-system-libuv', None,

'Use the system provided libuv, instead of the bundled one'),

]

boolean_options = build_ext.boolean_options + [

'cython-always',

'cython-annotate',

'use-system-libuv',

]

def initialize_options(self):

super().initialize_options()

self.use_system_libuv = False

self.cython_always = False

self.cython_annotate = None

self.cython_directives = None

def finalize_options(self):

need_cythonize = self.cython_always

cfiles = {}

for extension in self.distribution.ext_modules:

for i, sfile in enumerate(extension.sources):

if sfile.endswith('.pyx'):

prefix, ext = os.path.splitext(sfile)

cfile = prefix + '.c'

if os.path.exists(cfile) and not self.cython_always:

extension.sources[i] = cfile

else:

if os.path.exists(cfile):

cfiles[cfile] = os.path.getmtime(cfile)

else:

cfiles[cfile] = 0

need_cythonize = True

if need_cythonize:

from packaging.requirements import Requirement

# Double check Cython presence in case setup_requires

# didn't go into effect (most likely because someone

# imported Cython before setup_requires injected the

# correct egg into sys.path.

try:

import Cython

except ImportError:

raise RuntimeError(

'please install {} to compile uvloop from source'.format(

CYTHON_DEPENDENCY))

cython_dep = Requirement(CYTHON_DEPENDENCY)

if not cython_dep.specifier.contains(Cython.__version__):

raise RuntimeError(

'uvloop requires {}, got Cython=={}'.format(

CYTHON_DEPENDENCY, Cython.__version__

))

from Cython.Build import cythonize

directives = {}

if self.cython_directives:

for directive in self.cython_directives.split(','):

k, _, v = directive.partition('=')

if v.lower() == 'false':

v = False

if v.lower() == 'true':

v = True

directives[k] = v

self.cython_directives = directives

self.distribution.ext_modules[:] = cythonize(

self.distribution.ext_modules,

compiler_directives=directives,

annotate=self.cython_annotate,

compile_time_env=dict(DEFAULT_FREELIST_SIZE=250),

emit_linenums=self.debug)

super().finalize_options()

def build_libuv(self):

env = _libuv_build_env()

# Make sure configure and friends are present in case

# we are building from a git checkout.

_libuv_autogen(env)

# Copy the libuv tree to build/ so that its build

# products don't pollute sdist accidentally.

if os.path.exists(LIBUV_BUILD_DIR):

shutil.rmtree(LIBUV_BUILD_DIR)

shutil.copytree(LIBUV_DIR, LIBUV_BUILD_DIR)

# Sometimes pip fails to preserve the timestamps correctly,

# in which case, make will try to run autotools again.

subprocess.run(

['touch', 'configure.ac', 'aclocal.m4', 'configure',

'Makefile.am', 'Makefile.in'],

cwd=LIBUV_BUILD_DIR, env=env, check=True)

if 'LIBUV_CONFIGURE_HOST' in env:

cmd = ['./configure', '--host=' + env['LIBUV_CONFIGURE_HOST']]

else:

cmd = ['./configure']

subprocess.run(

cmd,

cwd=LIBUV_BUILD_DIR, env=env, check=True)

try:

njobs = len(os.sched_getaffinity(0))

except AttributeError:

njobs = os.cpu_count()

j_flag = '-j{}'.format(njobs or 1)

c_flag = "CFLAGS={}".format(env['CFLAGS'])

subprocess.run(

['make', j_flag, c_flag],

cwd=LIBUV_BUILD_DIR, env=env, check=True)

def build_extensions(self):

if self.use_system_libuv:

self.compiler.add_library('uv')

if sys.platform == 'darwin' and \

os.path.exists('/opt/local/include'):

# Support macports on Mac OS X.

self.compiler.add_include_dir('/opt/local/include')

else:

libuv_lib = os.path.join(LIBUV_BUILD_DIR, '.libs', 'libuv.a')

if not os.path.exists(libuv_lib):

self.build_libuv()

if not os.path.exists(libuv_lib):

raise RuntimeError('failed to build libuv')

self.extensions[-1].extra_objects.extend([libuv_lib])

self.compiler.add_include_dir(os.path.join(LIBUV_DIR, 'include'))

if sys.platform.startswith('linux'):

self.compiler.add_library('rt')

elif sys.platform.startswith(('freebsd', 'dragonfly')):

self.compiler.add_library('kvm')

elif sys.platform.startswith('sunos'):

self.compiler.add_library('kstat')

self.compiler.add_library('pthread')

super().build_extensions()

with open(str(_ROOT / 'uvloop' / '_version.py')) as f:

for line in f:

if line.startswith('__version__ ='):

_, _, version = line.partition('=')

VERSION = version.strip(" \n'\"")

break

else:

raise RuntimeError(

'unable to read the version from uvloop/_version.py')

setup_requires = []

if not (_ROOT / 'uvloop' / 'loop.c').exists() or '--cython-always' in sys.argv:

# No Cython output, require Cython to build.

setup_requires.append(CYTHON_DEPENDENCY)

setup(

version=VERSION,

cmdclass={

'sdist': uvloop_sdist,

'build_ext': uvloop_build_ext

ext_modules=[

Extension(

"uvloop.loop",

sources=[

"uvloop/loop.pyx",

extra_compile_args=MODULES_CFLAGS

setup_requires=setup_requires,

)

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