tools/distrib/python/grpcio_tools/setup.py - third_party/grpc - Git at Google

 # Copyright 2016 gRPC authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.

 from distutils import cygwinccompiler
 from distutils import extension
 from distutils import util
 import errno
 import os
 import os.path
 import pkg_resources
 import platform
 import re
 import shlex
 import shutil
 import sys
 import sysconfig

 import setuptools
 from setuptools.command import build_ext

 import subprocess
 from subprocess import PIPE

 # TODO(atash) add flag to disable Cython use

 _PACKAGE_PATH = os.path.realpath(os.path.dirname(__file__))
 _README_PATH = os.path.join(_PACKAGE_PATH, 'README.rst')

 os.chdir(os.path.dirname(os.path.abspath(__file__)))
 sys.path.insert(0, os.path.abspath('.'))

 import _parallel_compile_patch
 import protoc_lib_deps
 import grpc_version

 _EXT_INIT_SYMBOL = None
 if sys.version_info[0] == 2:
     _EXT_INIT_SYMBOL = "init_protoc_compiler"
 else:
     _EXT_INIT_SYMBOL = "PyInit__protoc_compiler"

 _parallel_compile_patch.monkeypatch_compile_maybe()

 CLASSIFIERS = [
     'Development Status :: 5 - Production/Stable',
     'Programming Language :: Python',
     'Programming Language :: Python :: 2',
     'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3',
     'Programming Language :: Python :: 3.4',
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
     'License :: OSI Approved :: Apache Software License',
 ]

 PY3 = sys.version_info.major == 3


 def _env_bool_value(env_name, default):
     """Parses a bool option from an environment variable"""
     return os.environ.get(env_name, default).upper() not in ['FALSE', '0', '']


 # Environment variable to determine whether or not the Cython extension should
 # *use* Cython or use the generated C files. Note that this requires the C files
 # to have been generated by building first *with* Cython support.
 BUILD_WITH_CYTHON = _env_bool_value('GRPC_PYTHON_BUILD_WITH_CYTHON', 'False')

 # Export this variable to force building the python extension with a statically linked libstdc++.
 # At least on linux, this is normally not needed as we can build manylinux-compatible wheels on linux just fine
 # without statically linking libstdc++ (which leads to a slight increase in the wheel size).
 # This option is useful when crosscompiling wheels for aarch64 where
 # it's difficult to ensure that the crosscompilation toolchain has a high-enough version
 # of GCC (we require >4.9) but still uses old-enough libstdc++ symbols.
 # TODO(jtattermusch): remove this workaround once issues with crosscompiler version are resolved.
 BUILD_WITH_STATIC_LIBSTDCXX = _env_bool_value(
     'GRPC_PYTHON_BUILD_WITH_STATIC_LIBSTDCXX', 'False')


 def check_linker_need_libatomic():
     """Test if linker on system needs libatomic."""
     code_test = (b'#include <atomic>\n' +
                  b'int main() { return std::atomic<int64_t>{}; }')
     cxx = os.environ.get('CXX', 'c++')
     cpp_test = subprocess.Popen([cxx, '-x', 'c++', '-std=c++11', '-'],
                                 stdin=PIPE,
                                 stdout=PIPE,
                                 stderr=PIPE)
     cpp_test.communicate(input=code_test)
     if cpp_test.returncode == 0:
         return False
     # Double-check to see if -latomic actually can solve the problem.
     # https://github.com/grpc/grpc/issues/22491
     cpp_test = subprocess.Popen(
         [cxx, '-x', 'c++', '-std=c++11', '-latomic', '-'],
         stdin=PIPE,
         stdout=PIPE,
         stderr=PIPE)
     cpp_test.communicate(input=code_test)
     return cpp_test.returncode == 0


 class BuildExt(build_ext.build_ext):
     """Custom build_ext command."""

     def get_ext_filename(self, ext_name):
         # since python3.5, python extensions' shared libraries use a suffix that corresponds to the value
         # of sysconfig.get_config_var('EXT_SUFFIX') and contains info about the architecture the library targets.
         # E.g. on x64 linux the suffix is ".cpython-XYZ-x86_64-linux-gnu.so"
         # When crosscompiling python wheels, we need to be able to override this suffix
         # so that the resulting file name matches the target architecture and we end up with a well-formed
         # wheel.
         filename = build_ext.build_ext.get_ext_filename(self, ext_name)
         orig_ext_suffix = sysconfig.get_config_var('EXT_SUFFIX')
         new_ext_suffix = os.getenv('GRPC_PYTHON_OVERRIDE_EXT_SUFFIX')
         if new_ext_suffix and filename.endswith(orig_ext_suffix):
             filename = filename[:-len(orig_ext_suffix)] + new_ext_suffix
         return filename


 # There are some situations (like on Windows) where CC, CFLAGS, and LDFLAGS are
 # entirely ignored/dropped/forgotten by distutils and its Cygwin/MinGW support.
 # We use these environment variables to thus get around that without locking
 # ourselves in w.r.t. the multitude of operating systems this ought to build on.
 # We can also use these variables as a way to inject environment-specific
 # compiler/linker flags. We assume GCC-like compilers and/or MinGW as a
 # reasonable default.
 EXTRA_ENV_COMPILE_ARGS = os.environ.get('GRPC_PYTHON_CFLAGS', None)
 EXTRA_ENV_LINK_ARGS = os.environ.get('GRPC_PYTHON_LDFLAGS', None)
 if EXTRA_ENV_COMPILE_ARGS is None:
     EXTRA_ENV_COMPILE_ARGS = '-std=c++11'
     if 'win32' in sys.platform:
         if sys.version_info < (3, 5):
             # We use define flags here and don't directly add to DEFINE_MACROS below to
             # ensure that the expert user/builder has a way of turning it off (via the
             # envvars) without adding yet more GRPC-specific envvars.
             # See https://sourceforge.net/p/mingw-w64/bugs/363/
             if '32' in platform.architecture()[0]:
                 EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime32 -D_timeb=__timeb32 -D_ftime_s=_ftime32_s -D_hypot=hypot'
             else:
                 EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime64 -D_timeb=__timeb64 -D_hypot=hypot'
         else:
             # We need to statically link the C++ Runtime, only the C runtime is
             # available dynamically
             EXTRA_ENV_COMPILE_ARGS += ' /MT'
     elif "linux" in sys.platform or "darwin" in sys.platform:
         EXTRA_ENV_COMPILE_ARGS += ' -fno-wrapv -frtti'
 if EXTRA_ENV_LINK_ARGS is None:
     EXTRA_ENV_LINK_ARGS = ''
     # NOTE(rbellevi): Clang on Mac OS will make all static symbols (both
     # variables and objects) global weak symbols. When a process loads the
     # protobuf wheel's shared object library before loading *this* C extension,
     # the runtime linker will prefer the protobuf module's version of symbols.
     # This results in the process using a mixture of symbols from the protobuf
     # wheel and this wheel, which may be using different versions of
     # libprotobuf. In the case that they *are* using different versions of
     # libprotobuf *and* there has been a change in data layout (or in other
     # invariants) segfaults, data corruption, or "bad things" may happen.
     #
     # This flag ensures that on Mac, the only global symbol is the one loaded by
     # the Python interpreter. The problematic global weak symbols become local
     # weak symbols.  This is not required on Linux since the compiler does not
     # produce global weak symbols. This is not required on Windows as our ".pyd"
     # file does not contain any symbols.
     #
     # Finally, the leading underscore here is part of the Mach-O ABI. Unlike
     # more modern ABIs (ELF et al.), Mach-O prepends an underscore to the names
     # of C functions.
     if "darwin" in sys.platform:
         EXTRA_ENV_LINK_ARGS += ' -Wl,-exported_symbol,_{}'.format(
             _EXT_INIT_SYMBOL)
     if "linux" in sys.platform or "darwin" in sys.platform:
         EXTRA_ENV_LINK_ARGS += ' -lpthread'
         if check_linker_need_libatomic():
             EXTRA_ENV_LINK_ARGS += ' -latomic'
     elif "win32" in sys.platform and sys.version_info < (3, 5):
         msvcr = cygwinccompiler.get_msvcr()[0]
         EXTRA_ENV_LINK_ARGS += (
             ' -static-libgcc -static-libstdc++ -mcrtdll={msvcr}'
             ' -static -lshlwapi'.format(msvcr=msvcr))

 EXTRA_COMPILE_ARGS = shlex.split(EXTRA_ENV_COMPILE_ARGS)
 EXTRA_LINK_ARGS = shlex.split(EXTRA_ENV_LINK_ARGS)

 if BUILD_WITH_STATIC_LIBSTDCXX:
     EXTRA_LINK_ARGS.append('-static-libstdc++')

 CC_FILES = [os.path.normpath(cc_file) for cc_file in protoc_lib_deps.CC_FILES]
 PROTO_FILES = [
     os.path.normpath(proto_file) for proto_file in protoc_lib_deps.PROTO_FILES
 ]
 CC_INCLUDE = os.path.normpath(protoc_lib_deps.CC_INCLUDE)
 PROTO_INCLUDE = os.path.normpath(protoc_lib_deps.PROTO_INCLUDE)

 GRPC_PYTHON_TOOLS_PACKAGE = 'grpc_tools'
 GRPC_PYTHON_PROTO_RESOURCES_NAME = '_proto'

 DEFINE_MACROS = ()
 if "win32" in sys.platform:
     DEFINE_MACROS += (('WIN32_LEAN_AND_MEAN', 1),)
     if '64bit' in platform.architecture()[0]:
         DEFINE_MACROS += (('MS_WIN64', 1),)
 elif "linux" in sys.platform or "darwin" in sys.platform:
     DEFINE_MACROS += (('HAVE_PTHREAD', 1),)

 # By default, Python3 distutils enforces compatibility of
 # c plugins (.so files) with the OSX version Python was built with.
 # We need OSX 10.10, the oldest which supports C++ thread_local.
 if 'darwin' in sys.platform:
     mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
     if mac_target and (pkg_resources.parse_version(mac_target) <
                        pkg_resources.parse_version('10.10.0')):
         os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.10'
         os.environ['_PYTHON_HOST_PLATFORM'] = re.sub(
             r'macosx-[0-9]+\.[0-9]+-(.+)', r'macosx-10.10-\1',
             util.get_platform())


 def package_data():
     tools_path = GRPC_PYTHON_TOOLS_PACKAGE.replace('.', os.path.sep)
     proto_resources_path = os.path.join(tools_path,
                                         GRPC_PYTHON_PROTO_RESOURCES_NAME)
     proto_files = []
     for proto_file in PROTO_FILES:
         source = os.path.join(PROTO_INCLUDE, proto_file)
         target = os.path.join(proto_resources_path, proto_file)
         relative_target = os.path.join(GRPC_PYTHON_PROTO_RESOURCES_NAME,
                                        proto_file)
         try:
             os.makedirs(os.path.dirname(target))
         except OSError as error:
             if error.errno == errno.EEXIST:
                 pass
             else:
                 raise
         shutil.copy(source, target)
         proto_files.append(relative_target)
     return {GRPC_PYTHON_TOOLS_PACKAGE: proto_files}


 def extension_modules():
     if BUILD_WITH_CYTHON:
         plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.pyx')]
     else:
         plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.cpp')]

     plugin_sources += [
         os.path.join('grpc_tools', 'main.cc'),
         os.path.join('grpc_root', 'src', 'compiler', 'python_generator.cc')
     ] + [os.path.join(CC_INCLUDE, cc_file) for cc_file in CC_FILES]

     plugin_ext = extension.Extension(
         name='grpc_tools._protoc_compiler',
         sources=plugin_sources,
         include_dirs=[
             '.',
             'grpc_root',
             os.path.join('grpc_root', 'include'),
             CC_INCLUDE,
         ],
         language='c++',
         define_macros=list(DEFINE_MACROS),
         extra_compile_args=list(EXTRA_COMPILE_ARGS),
         extra_link_args=list(EXTRA_LINK_ARGS),
     )
     extensions = [plugin_ext]
     if BUILD_WITH_CYTHON:
         from Cython import Build
         return Build.cythonize(extensions)
     else:
         return extensions


 setuptools.setup(name='grpcio-tools',
                  version=grpc_version.VERSION,
                  description='Protobuf code generator for gRPC',
                  long_description=open(_README_PATH, 'r').read(),
                  author='The gRPC Authors',
                  author_email='grpc-io@googlegroups.com',
                  url='https://grpc.io',
                  license='Apache License 2.0',
                  classifiers=CLASSIFIERS,
                  ext_modules=extension_modules(),
                  packages=setuptools.find_packages('.'),
                  install_requires=[
                      'protobuf>=3.5.0.post1, < 4.0dev',
                      'grpcio>={version}'.format(version=grpc_version.VERSION),
                      'setuptools',
                  ],
                  package_data=package_data(),
                  cmdclass={
                      'build_ext': BuildExt,
                  })
	# Copyright 2016 gRPC authors.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	from distutils import cygwinccompiler
	from distutils import extension
	from distutils import util
	import errno
	import os
	import os.path
	import pkg_resources
	import platform
	import re
	import shlex
	import shutil
	import sys
	import sysconfig

	import setuptools
	from setuptools.command import build_ext

	import subprocess
	from subprocess import PIPE

	# TODO(atash) add flag to disable Cython use

	_PACKAGE_PATH = os.path.realpath(os.path.dirname(__file__))
	_README_PATH = os.path.join(_PACKAGE_PATH, 'README.rst')

	os.chdir(os.path.dirname(os.path.abspath(__file__)))
	sys.path.insert(0, os.path.abspath('.'))

	import _parallel_compile_patch
	import protoc_lib_deps
	import grpc_version

	_EXT_INIT_SYMBOL = None
	if sys.version_info[0] == 2:
	_EXT_INIT_SYMBOL = "init_protoc_compiler"
	else:
	_EXT_INIT_SYMBOL = "PyInit__protoc_compiler"

	_parallel_compile_patch.monkeypatch_compile_maybe()

	CLASSIFIERS = [
	'Development Status :: 5 - Production/Stable',
	'Programming Language :: Python',
	'Programming Language :: Python :: 2',
	'Programming Language :: Python :: 2.7',
	'Programming Language :: Python :: 3',
	'Programming Language :: Python :: 3.4',
	'Programming Language :: Python :: 3.5',
	'Programming Language :: Python :: 3.6',
	'License :: OSI Approved :: Apache Software License',
	]

	PY3 = sys.version_info.major == 3


	def _env_bool_value(env_name, default):
	"""Parses a bool option from an environment variable"""
	return os.environ.get(env_name, default).upper() not in ['FALSE', '0', '']


	# Environment variable to determine whether or not the Cython extension should
	# use Cython or use the generated C files. Note that this requires the C files
	# to have been generated by building first with Cython support.
	BUILD_WITH_CYTHON = _env_bool_value('GRPC_PYTHON_BUILD_WITH_CYTHON', 'False')

	# Export this variable to force building the python extension with a statically linked libstdc++.
	# At least on linux, this is normally not needed as we can build manylinux-compatible wheels on linux just fine
	# without statically linking libstdc++ (which leads to a slight increase in the wheel size).
	# This option is useful when crosscompiling wheels for aarch64 where
	# it's difficult to ensure that the crosscompilation toolchain has a high-enough version
	# of GCC (we require >4.9) but still uses old-enough libstdc++ symbols.
	# TODO(jtattermusch): remove this workaround once issues with crosscompiler version are resolved.
	BUILD_WITH_STATIC_LIBSTDCXX = _env_bool_value(
	'GRPC_PYTHON_BUILD_WITH_STATIC_LIBSTDCXX', 'False')


	def check_linker_need_libatomic():
	"""Test if linker on system needs libatomic."""
	code_test = (b'#include <atomic>\n' +
	b'int main() { return std::atomic<int64_t>{}; }')
	cxx = os.environ.get('CXX', 'c++')
	cpp_test = subprocess.Popen([cxx, '-x', 'c++', '-std=c++11', '-'],
	stdin=PIPE,
	stdout=PIPE,
	stderr=PIPE)
	cpp_test.communicate(input=code_test)
	if cpp_test.returncode == 0:
	return False
	# Double-check to see if -latomic actually can solve the problem.
	# https://github.com/grpc/grpc/issues/22491
	cpp_test = subprocess.Popen(
	[cxx, '-x', 'c++', '-std=c++11', '-latomic', '-'],
	stdin=PIPE,
	stdout=PIPE,
	stderr=PIPE)
	cpp_test.communicate(input=code_test)
	return cpp_test.returncode == 0


	class BuildExt(build_ext.build_ext):
	"""Custom build_ext command."""

	def get_ext_filename(self, ext_name):
	# since python3.5, python extensions' shared libraries use a suffix that corresponds to the value
	# of sysconfig.get_config_var('EXT_SUFFIX') and contains info about the architecture the library targets.
	# E.g. on x64 linux the suffix is ".cpython-XYZ-x86_64-linux-gnu.so"
	# When crosscompiling python wheels, we need to be able to override this suffix
	# so that the resulting file name matches the target architecture and we end up with a well-formed
	# wheel.
	filename = build_ext.build_ext.get_ext_filename(self, ext_name)
	orig_ext_suffix = sysconfig.get_config_var('EXT_SUFFIX')
	new_ext_suffix = os.getenv('GRPC_PYTHON_OVERRIDE_EXT_SUFFIX')
	if new_ext_suffix and filename.endswith(orig_ext_suffix):
	filename = filename[:-len(orig_ext_suffix)] + new_ext_suffix
	return filename


	# There are some situations (like on Windows) where CC, CFLAGS, and LDFLAGS are
	# entirely ignored/dropped/forgotten by distutils and its Cygwin/MinGW support.
	# We use these environment variables to thus get around that without locking
	# ourselves in w.r.t. the multitude of operating systems this ought to build on.
	# We can also use these variables as a way to inject environment-specific
	# compiler/linker flags. We assume GCC-like compilers and/or MinGW as a
	# reasonable default.
	EXTRA_ENV_COMPILE_ARGS = os.environ.get('GRPC_PYTHON_CFLAGS', None)
	EXTRA_ENV_LINK_ARGS = os.environ.get('GRPC_PYTHON_LDFLAGS', None)
	if EXTRA_ENV_COMPILE_ARGS is None:
	EXTRA_ENV_COMPILE_ARGS = '-std=c++11'
	if 'win32' in sys.platform:
	if sys.version_info < (3, 5):
	# We use define flags here and don't directly add to DEFINE_MACROS below to
	# ensure that the expert user/builder has a way of turning it off (via the
	# envvars) without adding yet more GRPC-specific envvars.
	# See https://sourceforge.net/p/mingw-w64/bugs/363/
	if '32' in platform.architecture()[0]:
	EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime32 -D_timeb=__timeb32 -D_ftime_s=_ftime32_s -D_hypot=hypot'
	else:
	EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime64 -D_timeb=__timeb64 -D_hypot=hypot'
	else:
	# We need to statically link the C++ Runtime, only the C runtime is
	# available dynamically
	EXTRA_ENV_COMPILE_ARGS += ' /MT'
	elif "linux" in sys.platform or "darwin" in sys.platform:
	EXTRA_ENV_COMPILE_ARGS += ' -fno-wrapv -frtti'
	if EXTRA_ENV_LINK_ARGS is None:
	EXTRA_ENV_LINK_ARGS = ''
	# NOTE(rbellevi): Clang on Mac OS will make all static symbols (both
	# variables and objects) global weak symbols. When a process loads the
	# protobuf wheel's shared object library before loading this C extension,
	# the runtime linker will prefer the protobuf module's version of symbols.
	# This results in the process using a mixture of symbols from the protobuf
	# wheel and this wheel, which may be using different versions of
	# libprotobuf. In the case that they are using different versions of
	# libprotobuf and there has been a change in data layout (or in other
	# invariants) segfaults, data corruption, or "bad things" may happen.
	#
	# This flag ensures that on Mac, the only global symbol is the one loaded by
	# the Python interpreter. The problematic global weak symbols become local
	# weak symbols. This is not required on Linux since the compiler does not
	# produce global weak symbols. This is not required on Windows as our ".pyd"
	# file does not contain any symbols.
	#
	# Finally, the leading underscore here is part of the Mach-O ABI. Unlike
	# more modern ABIs (ELF et al.), Mach-O prepends an underscore to the names
	# of C functions.
	if "darwin" in sys.platform:
	EXTRA_ENV_LINK_ARGS += ' -Wl,-exported_symbol,_{}'.format(
	_EXT_INIT_SYMBOL)
	if "linux" in sys.platform or "darwin" in sys.platform:
	EXTRA_ENV_LINK_ARGS += ' -lpthread'
	if check_linker_need_libatomic():
	EXTRA_ENV_LINK_ARGS += ' -latomic'
	elif "win32" in sys.platform and sys.version_info < (3, 5):
	msvcr = cygwinccompiler.get_msvcr()[0]
	EXTRA_ENV_LINK_ARGS += (
	' -static-libgcc -static-libstdc++ -mcrtdll={msvcr}'
	' -static -lshlwapi'.format(msvcr=msvcr))

	EXTRA_COMPILE_ARGS = shlex.split(EXTRA_ENV_COMPILE_ARGS)
	EXTRA_LINK_ARGS = shlex.split(EXTRA_ENV_LINK_ARGS)

	if BUILD_WITH_STATIC_LIBSTDCXX:
	EXTRA_LINK_ARGS.append('-static-libstdc++')

	CC_FILES = [os.path.normpath(cc_file) for cc_file in protoc_lib_deps.CC_FILES]
	PROTO_FILES = [
	os.path.normpath(proto_file) for proto_file in protoc_lib_deps.PROTO_FILES
	]
	CC_INCLUDE = os.path.normpath(protoc_lib_deps.CC_INCLUDE)
	PROTO_INCLUDE = os.path.normpath(protoc_lib_deps.PROTO_INCLUDE)

	GRPC_PYTHON_TOOLS_PACKAGE = 'grpc_tools'
	GRPC_PYTHON_PROTO_RESOURCES_NAME = '_proto'

	DEFINE_MACROS = ()
	if "win32" in sys.platform:
	DEFINE_MACROS += (('WIN32_LEAN_AND_MEAN', 1),)
	if '64bit' in platform.architecture()[0]:
	DEFINE_MACROS += (('MS_WIN64', 1),)
	elif "linux" in sys.platform or "darwin" in sys.platform:
	DEFINE_MACROS += (('HAVE_PTHREAD', 1),)

	# By default, Python3 distutils enforces compatibility of
	# c plugins (.so files) with the OSX version Python was built with.
	# We need OSX 10.10, the oldest which supports C++ thread_local.
	if 'darwin' in sys.platform:
	mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
	if mac_target and (pkg_resources.parse_version(mac_target) <
	pkg_resources.parse_version('10.10.0')):
	os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.10'
	os.environ['_PYTHON_HOST_PLATFORM'] = re.sub(
	r'macosx-[0-9]+\.[0-9]+-(.+)', r'macosx-10.10-\1',
	util.get_platform())


	def package_data():
	tools_path = GRPC_PYTHON_TOOLS_PACKAGE.replace('.', os.path.sep)
	proto_resources_path = os.path.join(tools_path,
	GRPC_PYTHON_PROTO_RESOURCES_NAME)
	proto_files = []
	for proto_file in PROTO_FILES:
	source = os.path.join(PROTO_INCLUDE, proto_file)
	target = os.path.join(proto_resources_path, proto_file)
	relative_target = os.path.join(GRPC_PYTHON_PROTO_RESOURCES_NAME,
	proto_file)
	try:
	os.makedirs(os.path.dirname(target))
	except OSError as error:
	if error.errno == errno.EEXIST:
	pass
	else:
	raise
	shutil.copy(source, target)
	proto_files.append(relative_target)
	return {GRPC_PYTHON_TOOLS_PACKAGE: proto_files}


	def extension_modules():
	if BUILD_WITH_CYTHON:
	plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.pyx')]
	else:
	plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.cpp')]

	plugin_sources += [
	os.path.join('grpc_tools', 'main.cc'),
	os.path.join('grpc_root', 'src', 'compiler', 'python_generator.cc')
	] + [os.path.join(CC_INCLUDE, cc_file) for cc_file in CC_FILES]

	plugin_ext = extension.Extension(
	name='grpc_tools._protoc_compiler',
	sources=plugin_sources,
	include_dirs=[
	'.',
	'grpc_root',
	os.path.join('grpc_root', 'include'),
	CC_INCLUDE,
	],
	language='c++',
	define_macros=list(DEFINE_MACROS),
	extra_compile_args=list(EXTRA_COMPILE_ARGS),
	extra_link_args=list(EXTRA_LINK_ARGS),
	)
	extensions = [plugin_ext]
	if BUILD_WITH_CYTHON:
	from Cython import Build
	return Build.cythonize(extensions)
	else:
	return extensions


	setuptools.setup(name='grpcio-tools',
	version=grpc_version.VERSION,
	description='Protobuf code generator for gRPC',
	long_description=open(_README_PATH, 'r').read(),
	author='The gRPC Authors',
	author_email='grpc-io@googlegroups.com',
	url='https://grpc.io',
	license='Apache License 2.0',
	classifiers=CLASSIFIERS,
	ext_modules=extension_modules(),
	packages=setuptools.find_packages('.'),
	install_requires=[
	'protobuf>=3.5.0.post1, < 4.0dev',
	'grpcio>={version}'.format(version=grpc_version.VERSION),
	'setuptools',
	],
	package_data=package_data(),
	cmdclass={
	'build_ext': BuildExt,
	})