File: mach_commands.py

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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# Integrates Talos mozharness with mach

from __future__ import absolute_import, print_function, unicode_literals

import os
import sys
import json
import socket

from mozbuild.base import MozbuildObject, MachCommandBase
from mach.decorators import CommandProvider, Command

HERE = os.path.dirname(os.path.realpath(__file__))


class TalosRunner(MozbuildObject):
    def run_test(self, talos_args):
        """
        We want to do couple of things before running Talos
        1. Clone mozharness
        2. Make config for Talos Mozharness
        3. Run mozharness
        """

        self.init_variables(talos_args)
        self.make_config()
        self.write_config()
        self.make_args()
        return self.run_mozharness()

    def init_variables(self, talos_args):
        self.talos_dir = os.path.join(self.topsrcdir, 'testing', 'talos')
        self.mozharness_dir = os.path.join(self.topsrcdir, 'testing',
                                           'mozharness')
        self.talos_json = os.path.join(self.talos_dir, 'talos.json')
        self.config_file_path = os.path.join(self._topobjdir, 'testing',
                                             'talos-in_tree_conf.json')
        self.binary_path = self.get_binary_path()
        self.virtualenv_script = os.path.join(self.topsrcdir, 'third_party', 'python',
                                              'virtualenv', 'virtualenv.py')
        self.virtualenv_path = os.path.join(self._topobjdir, 'testing',
                                            'talos-venv')
        self.python_interp = sys.executable
        self.talos_args = talos_args

    def make_config(self):
        default_actions = ['populate-webroot']
        default_actions.extend([
            'create-virtualenv',
            'setup-mitmproxy',
            'run-tests',
        ])
        self.config = {
            'run_local': True,
            'talos_json': self.talos_json,
            'binary_path': self.binary_path,
            'repo_path': self.topsrcdir,
            'obj_path': self.topobjdir,
            'log_name': 'talos',
            'virtualenv_path': self.virtualenv_path,
            'pypi_url': 'http://pypi.python.org/simple',
            'base_work_dir': self.mozharness_dir,
            'exes': {
                'python': self.python_interp,
                'virtualenv': [self.python_interp, self.virtualenv_script]
            },
            'title': socket.gethostname(),
            'default_actions': default_actions,
            'talos_extra_options': ['--develop'] + self.talos_args,
            'python3_manifest': {
                'win32': 'python3.manifest',
                'win64': 'python3_x64.manifest',
            }
        }

    def make_args(self):
        self.args = {
            'config': {},
            'initial_config_file': self.config_file_path,
        }

    def write_config(self):
        try:
            config_file = open(self.config_file_path, 'wb')
            config_file.write(json.dumps(self.config))
        except IOError as e:
            err_str = "Error writing to Talos Mozharness config file {0}:{1}"
            print(err_str.format(self.config_file_path, str(e)))
            raise e

    def run_mozharness(self):
        sys.path.insert(0, self.mozharness_dir)
        from mozharness.mozilla.testing.talos import Talos
        talos_mh = Talos(config=self.args['config'],
                         initial_config_file=self.args['initial_config_file'])
        return talos_mh.run()


def create_parser():
    sys.path.insert(0, HERE)  # allow to import the talos package
    from talos.cmdline import create_parser
    return create_parser(mach_interface=True)


@CommandProvider
class MachCommands(MachCommandBase):
    @Command('talos-test', category='testing',
             description='Run talos tests (performance testing).',
             parser=create_parser)
    def run_talos_test(self, **kwargs):
        talos = self._spawn(TalosRunner)

        try:
            return talos.run_test(sys.argv[2:])
        except Exception as e:
            print(str(e))
            return 1