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"""Provides distutils command classes for the GRPC Python setup process.""" import distutils import glob import os import os.path import platform import re import shutil import subprocess import sys import traceback import setuptools from setuptools.command import build_ext from setuptools.command import build_py from setuptools.command import easy_install from setuptools.command import install from setuptools.command import test import support PYTHON_STEM = os.path.dirname(os.path.abspath(__file__)) GRPC_STEM = os.path.abspath(PYTHON_STEM + '../../../../') PROTO_STEM = os.path.join(GRPC_STEM, 'src', 'proto') PROTO_GEN_STEM = os.path.join(GRPC_STEM, 'src', 'python', 'gens') CYTHON_STEM = os.path.join(PYTHON_STEM, 'grpc', '_cython') CONF_PY_ADDENDUM = """ extensions.append('sphinx.ext.napoleon') napoleon_google_docstring = True napoleon_numpy_docstring = True napoleon_include_special_with_doc = True html_theme = 'sphinx_rtd_theme' copyright = "2016, The gRPC Authors" """ API_GLOSSARY = """ Glossary ================ .. glossary:: metadatum A key-value pair included in the HTTP header. It is a 2-tuple where the first entry is the key and the second is the value, i.e. (key, value). The metadata key is an ASCII str, and must be a valid HTTP header name. The metadata value can be either a valid HTTP ASCII str, or bytes. If bytes are provided, the key must end with '-bin', i.e. ``('binary-metadata-bin', b'\\x00\\xFF')`` metadata A sequence of metadatum. """ class CommandError(Exception): """Simple exception class for GRPC custom commands.""" # TODO(atash): Remove this once PyPI has better Linux bdist support. See # https://bitbucket.org/pypa/pypi/issues/120/binary-wheels-for-linux-are-not-supported def _get_grpc_custom_bdist(decorated_basename, target_bdist_basename): """Returns a string path to a bdist file for Linux to install. If we can retrieve a pre-compiled bdist from online, uses it. Else, emits a warning and builds from source. """ # TODO(atash): somehow the name that's returned from `wheel` is different # between different versions of 'wheel' (but from a compatibility standpoint, # the names are compatible); we should have some way of determining name # compatibility in the same way `wheel` does to avoid having to rename all of # the custom wheels that we build/upload to GCS. # Break import style to ensure that setup.py has had a chance to install the # relevant package. from six.moves.urllib import request decorated_path = decorated_basename + GRPC_CUSTOM_BDIST_EXT try: url = BINARIES_REPOSITORY + '/{target}'.format(target=decorated_path) bdist_data = request.urlopen(url).read() except IOError as error: raise CommandError( '{}\n\nCould not find the bdist {}: {}' .format(traceback.format_exc(), decorated_path, error.message)) # Our chosen local bdist path. bdist_path = target_bdist_basename + GRPC_CUSTOM_BDIST_EXT try: with open(bdist_path, 'w') as bdist_file: bdist_file.write(bdist_data) except IOError as error: raise CommandError( '{}\n\nCould not write grpcio bdist: {}' .format(traceback.format_exc(), error.message)) return bdist_path class SphinxDocumentation(setuptools.Command): """Command to generate documentation via sphinx.""" description = 'generate sphinx documentation' user_options = [] def initialize_options(self): pass def finalize_options(self): pass def run(self): # We import here to ensure that setup.py has had a chance to install the # relevant package eggs first. import sphinx import sphinx.apidoc metadata = self.distribution.metadata src_dir = os.path.join(PYTHON_STEM, 'grpc') sys.path.append(src_dir) sphinx.apidoc.main([ '', '--force', '--full', '-H', metadata.name, '-A', metadata.author, '-V', metadata.version, '-R', metadata.version, '-o', os.path.join('doc', 'src'), src_dir]) conf_filepath = os.path.join('doc', 'src', 'conf.py') with open(conf_filepath, 'a') as conf_file: conf_file.write(CONF_PY_ADDENDUM) glossary_filepath = os.path.join('doc', 'src', 'grpc.rst') with open(glossary_filepath, 'a') as glossary_filepath: glossary_filepath.write(API_GLOSSARY) sphinx.main(['', os.path.join('doc', 'src'), os.path.join('doc', 'build')]) class BuildProjectMetadata(setuptools.Command): """Command to generate project metadata in a module.""" description = 'build grpcio project metadata files' user_options = [] def initialize_options(self): pass def finalize_options(self): pass def run(self): with open(os.path.join(PYTHON_STEM, 'grpc/_grpcio_metadata.py'), 'w') as module_file: module_file.write('__version__ = """{}"""'.format( self.distribution.get_version())) class BuildPy(build_py.build_py): """Custom project build command.""" def run(self): self.run_command('build_project_metadata') build_py.build_py.run(self) def _poison_extensions(extensions, message): """Includes a file that will always fail to compile in all extensions.""" poison_filename = os.path.join(PYTHON_STEM, 'poison.c') with open(poison_filename, 'w') as poison: poison.write('#error {}'.format(message)) for extension in extensions: extension.sources = [poison_filename] def check_and_update_cythonization(extensions): """Replace .pyx files with their generated counterparts and return whether or not cythonization still needs to occur.""" for extension in extensions: generated_pyx_sources = [] other_sources = [] for source in extension.sources: base, file_ext = os.path.splitext(source) if file_ext == '.pyx': generated_pyx_source = next( (base + gen_ext for gen_ext in ('.c', '.cpp',) if os.path.isfile(base + gen_ext)), None) if generated_pyx_source: generated_pyx_sources.append(generated_pyx_source) else: sys.stderr.write('Cython-generated files are missing...\n') return False else: other_sources.append(source) extension.sources = generated_pyx_sources + other_sources sys.stderr.write('Found cython-generated files...\n') return True def try_cythonize(extensions, linetracing=False, mandatory=True): """Attempt to cythonize the extensions. Args: extensions: A list of `distutils.extension.Extension`. linetracing: A bool indicating whether or not to enable linetracing. mandatory: Whether or not having Cython-generated files is mandatory. If it is, extensions will be poisoned when they can't be fully generated. """ try: # Break import style to ensure we have access to Cython post-setup_requires import Cython.Build except ImportError: if mandatory: sys.stderr.write( "This package needs to generate C files with Cython but it cannot. " "Poisoning extension sources to disallow extension commands...") _poison_extensions( extensions, "Extensions have been poisoned due to missing Cython-generated code.") return extensions cython_compiler_directives = {} if linetracing: additional_define_macros = [('CYTHON_TRACE_NOGIL', '1')] cython_compiler_directives['linetrace'] = True return Cython.Build.cythonize( extensions, include_path=[ include_dir for extension in extensions for include_dir in extension.include_dirs ] + [CYTHON_STEM], compiler_directives=cython_compiler_directives ) class BuildExt(build_ext.build_ext): """Custom build_ext command to enable compiler-specific flags.""" C_OPTIONS = { 'unix': ('-pthread', '-std=gnu99'), 'msvc': (), } LINK_OPTIONS = {} def build_extensions(self): compiler = self.compiler.compiler_type if compiler in BuildExt.C_OPTIONS: for extension in self.extensions: extension.extra_compile_args += list(BuildExt.C_OPTIONS[compiler]) if compiler in BuildExt.LINK_OPTIONS: for extension in self.extensions: extension.extra_link_args += list(BuildExt.LINK_OPTIONS[compiler]) if not check_and_update_cythonization(self.extensions): self.extensions = try_cythonize(self.extensions) try: build_ext.build_ext.build_extensions(self) except Exception as error: formatted_exception = traceback.format_exc() support.diagnose_build_ext_error(self, error, formatted_exception) raise CommandError( "Failed `build_ext` step:\n{}".format(formatted_exception)) class Gather(setuptools.Command): """Command to gather project dependencies.""" description = 'gather dependencies for grpcio' user_options = [ ('test', 't', 'flag indicating to gather test dependencies'), ('install', 'i', 'flag indicating to gather install dependencies') ] def initialize_options(self): self.test = False self.install = False def finalize_options(self): # distutils requires this override. pass def run(self): if self.install and self.distribution.install_requires: self.distribution.fetch_build_eggs(self.distribution.install_requires) if self.test and self.distribution.tests_require: self.distribution.fetch_build_eggs(self.distribution.tests_require)