setup.py

# Copyright 2015, Google Inc.
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# modification, are permitted provided that the following conditions are
# met:
#
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# this software without specific prior written permission.
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"""A setup module for the GRPC Python package."""

import os
import os.path
import shlex
import shutil
import sys
import sysconfig

from distutils import core as _core
from distutils import extension as _extension
import pkg_resources
import setuptools
from setuptools.command import egg_info

# Redirect the manifest template from MANIFEST.in to PYTHON-MANIFEST.in.
egg_info.manifest_maker.template = 'PYTHON-MANIFEST.in'

PY3 = sys.version_info.major == 3
PYTHON_STEM = './src/python/grpcio'
CORE_INCLUDE = ('./include', '.',)
BORINGSSL_INCLUDE = ('./third_party/boringssl/include',)
ZLIB_INCLUDE = ('./third_party/zlib',)

# Ensure we're in the proper directory whether or not we're being used by pip.
os.chdir(os.path.dirname(os.path.abspath(__file__)))
sys.path.insert(0, os.path.abspath(PYTHON_STEM))

# Break import-style to ensure we can actually find our in-repo dependencies.
import commands
import grpc_core_dependencies
import grpc_version

LICENSE = '3-clause BSD'

# 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 = os.environ.get('GRPC_PYTHON_BUILD_WITH_CYTHON', False)

# Environment variable to determine whether or not to enable coverage analysis
# in Cython modules.
ENABLE_CYTHON_TRACING = os.environ.get(
    'GRPC_PYTHON_ENABLE_CYTHON_TRACING', False)

CYTHON_EXTENSION_PACKAGE_NAMES = ()

CYTHON_EXTENSION_MODULE_NAMES = ('grpc._cython.cygrpc',)

CYTHON_HELPER_C_FILES = (
    os.path.join(PYTHON_STEM, 'grpc/_cython/loader.c'),
    os.path.join(PYTHON_STEM, 'grpc/_cython/imports.generated.c'),
)

CORE_C_FILES = ()
if not "win32" in sys.platform:
  CORE_C_FILES += tuple(grpc_core_dependencies.CORE_SOURCE_FILES)

EXTENSION_INCLUDE_DIRECTORIES = (
    (PYTHON_STEM,) + CORE_INCLUDE + BORINGSSL_INCLUDE + ZLIB_INCLUDE)

EXTENSION_LIBRARIES = ()
if "linux" in sys.platform:
  EXTENSION_LIBRARIES += ('rt',)
if not "win32" in sys.platform:
  EXTENSION_LIBRARIES += ('m',)

DEFINE_MACROS = (('OPENSSL_NO_ASM', 1), ('_WIN32_WINNT', 0x600), ('GPR_BACKWARDS_COMPATIBILITY_MODE', 1),)

LDFLAGS = shlex.split(os.environ.get('GRPC_PYTHON_LDFLAGS', ''))
CFLAGS = shlex.split(os.environ.get('GRPC_PYTHON_CFLAGS', ''))

if "linux" in sys.platform:
  LDFLAGS += ('-Wl,-wrap,memcpy',)
if "linux" in sys.platform or "darwin" in sys.platform:
  CFLAGS += ('-fvisibility=hidden',)

  pymodinit_type = 'PyObject*' if PY3 else 'void'

  pymodinit = '__attribute__((visibility ("default"))) {}'.format(pymodinit_type)
  DEFINE_MACROS += (('PyMODINIT_FUNC', pymodinit),)


# By default, Python3 distutils enforces compatibility of
# c plugins (.so files) with the OSX version Python3 was built with.
# For Python3.4, this is OSX 10.6, but we need Thread Local Support (__thread)
if 'darwin' in sys.platform and PY3:
  mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
  if mac_target and (pkg_resources.parse_version(mac_target) <
                     pkg_resources.parse_version('10.7.0')):
    os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.7'


def cython_extensions(module_names, extra_sources, include_dirs,
                      libraries, define_macros, build_with_cython=False):
  # Set compiler directives linetrace argument only if we care about tracing;
  # this is due to Cython having different behavior between linetrace being
  # False and linetrace being unset. See issue #5689.
  cython_compiler_directives = {}
  if ENABLE_CYTHON_TRACING:
    define_macros = define_macros + [('CYTHON_TRACE_NOGIL', 1)]
    cython_compiler_directives['linetrace'] = True
  file_extension = 'pyx' if build_with_cython else 'c'
  module_files = [os.path.join(PYTHON_STEM,
                               name.replace('.', '/') + '.' + file_extension)
                  for name in module_names]
  extensions = [
      _extension.Extension(
          name=module_name,
          sources=[module_file] + extra_sources,
          include_dirs=include_dirs, libraries=libraries,
          define_macros=define_macros,
          extra_compile_args=list(CFLAGS),
          extra_link_args=list(LDFLAGS),
      ) for (module_name, module_file) in zip(module_names, module_files)
  ]
  if build_with_cython:
    import Cython.Build
    return Cython.Build.cythonize(
        extensions,
        include_path=include_dirs,
        compiler_directives=cython_compiler_directives)
  else:
    return extensions

CYTHON_EXTENSION_MODULES = cython_extensions(
    list(CYTHON_EXTENSION_MODULE_NAMES),
    list(CYTHON_HELPER_C_FILES) + list(CORE_C_FILES),
    list(EXTENSION_INCLUDE_DIRECTORIES), list(EXTENSION_LIBRARIES),
    list(DEFINE_MACROS), bool(BUILD_WITH_CYTHON))

PACKAGE_DIRECTORIES = {
    '': PYTHON_STEM,
}

INSTALL_REQUIRES = (
    'six>=1.5.2',
    'enum34>=1.0.4',
    'futures>=2.2.0',
    # TODO(atash): eventually split the grpcio package into a metapackage
    # depending on protobuf and the runtime component (independent of protobuf)
    'protobuf>=3.0.0a3',
)

SETUP_REQUIRES = INSTALL_REQUIRES + (
    'sphinx>=1.3',
    'sphinx_rtd_theme>=0.1.8',
    'six>=1.10',
)

COMMAND_CLASS = {
    'doc': commands.SphinxDocumentation,
    'build_project_metadata': commands.BuildProjectMetadata,
    'build_py': commands.BuildPy,
    'build_ext': commands.BuildExt,
    'gather': commands.Gather,
}

# Ensure that package data is copied over before any commands have been run:
credentials_dir = os.path.join(PYTHON_STEM, 'grpc/_cython/_credentials')
try:
  os.mkdir(credentials_dir)
except OSError:
  pass
shutil.copyfile('etc/roots.pem', os.path.join(credentials_dir, 'roots.pem'))

PACKAGE_DATA = {
    # Binaries that may or may not be present in the final installation, but are
    # mentioned here for completeness.
    'grpc._cython': [
        '_credentials/roots.pem',
        '_windows/grpc_c.32.python',
        '_windows/grpc_c.64.python',
    ],
}
PACKAGES = setuptools.find_packages(PYTHON_STEM)

setuptools.setup(
  name='grpcio',
  version=grpc_version.VERSION,
  license=LICENSE,
  ext_modules=CYTHON_EXTENSION_MODULES,
  packages=list(PACKAGES),
  package_dir=PACKAGE_DIRECTORIES,
  package_data=PACKAGE_DATA,
  install_requires=INSTALL_REQUIRES,
  setup_requires=SETUP_REQUIRES,
  cmdclass=COMMAND_CLASS,
)