src/python/grpcio_tests/commands.py

# Copyright 2015, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#     * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""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

PYTHON_STEM = os.path.dirname(os.path.abspath(__file__))
GRPC_STEM = os.path.abspath(PYTHON_STEM + '../../../../')
GRPC_PROTO_STEM = os.path.join(GRPC_STEM, 'src', 'proto')
PROTO_STEM = os.path.join(PYTHON_STEM, 'src', 'proto')
PYTHON_PROTO_TOP_LEVEL = os.path.join(PYTHON_STEM, 'src')


class CommandError(object):
    pass


class GatherProto(setuptools.Command):

    description = 'gather proto dependencies'
    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def run(self):
        # TODO(atash) ensure that we're running from the repository directory when
        # this command is used
        try:
            shutil.rmtree(PROTO_STEM)
        except Exception as error:
            # We don't care if this command fails
            pass
        shutil.copytree(GRPC_PROTO_STEM, PROTO_STEM)
        for root, _, _ in os.walk(PYTHON_PROTO_TOP_LEVEL):
            path = os.path.join(root, '__init__.py')
            open(path, 'a').close()


class BuildProtoModules(setuptools.Command):
    """Command to generate project *_pb2.py modules from proto files."""

    description = 'build protobuf modules'
    user_options = [
        ('include=', None, 'path patterns to include in protobuf generation'),
        ('exclude=', None, 'path patterns to exclude from protobuf generation')
    ]

    def initialize_options(self):
        self.exclude = None
        self.include = r'.*\.proto$'

    def finalize_options(self):
        pass

    def run(self):
        import grpc_tools.protoc as protoc

        include_regex = re.compile(self.include)
        exclude_regex = re.compile(self.exclude) if self.exclude else None
        paths = []
        for walk_root, directories, filenames in os.walk(PROTO_STEM):
            for filename in filenames:
                path = os.path.join(walk_root, filename)
                if include_regex.match(path) and not (
                        exclude_regex and exclude_regex.match(path)):
                    paths.append(path)

        # TODO(kpayson): It would be nice to do this in a batch command,
        # but we currently have name conflicts in src/proto
        for path in paths:
            command = [
                'grpc_tools.protoc',
                '-I {}'.format(PROTO_STEM),
                '--python_out={}'.format(PROTO_STEM),
                '--grpc_python_out={}'.format(PROTO_STEM),
            ] + [path]
            if protoc.main(command) != 0:
                sys.stderr.write(
                    'warning: Command:\n{}\nFailed'.format(command))

        # Generated proto directories dont include __init__.py, but
        # these are needed for python package resolution
        for walk_root, _, _ in os.walk(PROTO_STEM):
            path = os.path.join(walk_root, '__init__.py')
            open(path, 'a').close()


class BuildPy(build_py.build_py):
    """Custom project build command."""

    def run(self):
        try:
            self.run_command('build_package_protos')
        except CommandError as error:
            sys.stderr.write('warning: %s\n' % error.message)
        build_py.build_py.run(self)


class TestLite(setuptools.Command):
    """Command to run tests without fetching or building anything."""

    description = 'run tests without fetching or building anything.'
    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        # distutils requires this override.
        pass

    def run(self):
        self._add_eggs_to_path()

        import tests
        loader = tests.Loader()
        loader.loadTestsFromNames(['tests'])
        runner = tests.Runner()
        result = runner.run(loader.suite)
        if not result.wasSuccessful():
            sys.exit('Test failure')

    def _add_eggs_to_path(self):
        """Fetch install and test requirements"""
        self.distribution.fetch_build_eggs(self.distribution.install_requires)
        self.distribution.fetch_build_eggs(self.distribution.tests_require)


class RunInterop(test.test):

    description = 'run interop test client/server'
    user_options = [('args=', 'a', 'pass-thru arguments for the client/server'),
                    ('client', 'c', 'flag indicating to run the client'),
                    ('server', 's', 'flag indicating to run the server')]

    def initialize_options(self):
        self.args = ''
        self.client = False
        self.server = False

    def finalize_options(self):
        if self.client and self.server:
            raise DistutilsOptionError(
                'you may only specify one of client or server')

    def run(self):
        if self.distribution.install_requires:
            self.distribution.fetch_build_eggs(
                self.distribution.install_requires)
        if self.distribution.tests_require:
            self.distribution.fetch_build_eggs(self.distribution.tests_require)
        if self.client:
            self.run_client()
        elif self.server:
            self.run_server()

    def run_server(self):
        # We import here to ensure that our setuptools parent has had a chance to
        # edit the Python system path.
        from tests.interop import server
        sys.argv[1:] = self.args.split()
        server.serve()

    def run_client(self):
        # We import here to ensure that our setuptools parent has had a chance to
        # edit the Python system path.
        from tests.interop import client
        sys.argv[1:] = self.args.split()
        client.test_interoperability()