DXR will be turned off on Tuesday, December 29th. It will redirect to Searchfox.
See the announcement on Discourse.

DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (cdf352f02ac4)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322
# 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/.

from __future__ import absolute_import, print_function, unicode_literals

import argparse
import logging
import os
import sys
import tempfile
from multiprocessing import cpu_count

from concurrent.futures import (
    ThreadPoolExecutor,
    as_completed,
    thread,
)

import mozinfo
from mozfile import which
from manifestparser import TestManifest
from manifestparser import filters as mpf

from mozbuild.base import (
    MachCommandBase,
)
from mozbuild.virtualenv import VirtualenvManager

from mach.decorators import (
    CommandArgument,
    CommandProvider,
    Command,
)

here = os.path.abspath(os.path.dirname(__file__))


@CommandProvider
class MachCommands(MachCommandBase):
    @Command('python', category='devenv',
             description='Run Python.')
    @CommandArgument('--no-virtualenv', action='store_true',
                     help='Do not set up a virtualenv')
    @CommandArgument('--exec-file',
                     default=None,
                     help='Execute this Python file using `exec`')
    @CommandArgument('--ipython',
                     action='store_true',
                     default=False,
                     help='Use ipython instead of the default Python REPL.')
    @CommandArgument('args', nargs=argparse.REMAINDER)
    def python(self, no_virtualenv, exec_file, ipython, args):
        # Avoid logging the command
        self.log_manager.terminal_handler.setLevel(logging.CRITICAL)

        # Note: subprocess requires native strings in os.environ on Windows.
        append_env = {
            b'PYTHONDONTWRITEBYTECODE': str('1'),
        }

        if no_virtualenv:
            python_path = sys.executable
            append_env[b'PYTHONPATH'] = os.pathsep.join(sys.path)
        else:
            self._activate_virtualenv()
            python_path = self.virtualenv_manager.python_path

        if exec_file:
            exec(open(exec_file).read())
            return 0

        if ipython:
            bindir = os.path.dirname(python_path)
            python_path = which('ipython', path=bindir)
            if not python_path:
                if not no_virtualenv:
                    # Use `_run_pip` directly rather than `install_pip_package` to bypass
                    # `req.check_if_exists()` which may detect a system installed ipython.
                    self.virtualenv_manager._run_pip(['install', 'ipython'])
                    python_path = which('ipython', path=bindir)

                if not python_path:
                    print("error: could not detect or install ipython")
                    return 1

        return self.run_process([python_path] + args,
                                pass_thru=True,  # Allow user to run Python interactively.
                                ensure_exit_code=False,  # Don't throw on non-zero exit code.
                                append_env=append_env)

    @Command('python-test', category='testing',
             description='Run Python unit tests with an appropriate test runner.')
    @CommandArgument('-v', '--verbose',
                     default=False,
                     action='store_true',
                     help='Verbose output.')
    @CommandArgument('--python',
                     default='2.7',
                     help='Version of Python for Pipenv to use. When given a '
                          'Python version, Pipenv will automatically scan your '
                          'system for a Python that matches that given version.')
    @CommandArgument('-j', '--jobs',
                     default=None,
                     type=int,
                     help='Number of concurrent jobs to run. Default is the number of CPUs '
                          'in the system.')
    @CommandArgument('-x', '--exitfirst',
                     default=False,
                     action='store_true',
                     help='Runs all tests sequentially and breaks at the first failure.')
    @CommandArgument('--subsuite',
                     default=None,
                     help=('Python subsuite to run. If not specified, all subsuites are run. '
                           'Use the string `default` to only run tests without a subsuite.'))
    @CommandArgument('tests', nargs='*',
                     metavar='TEST',
                     help=('Tests to run. Each test can be a single file or a directory. '
                           'Default test resolution relies on PYTHON_UNITTEST_MANIFESTS.'))
    @CommandArgument('extra', nargs=argparse.REMAINDER,
                     metavar='PYTEST ARGS',
                     help=('Arguments that aren\'t recognized by mach. These will be '
                           'passed as it is to pytest'))
    def python_test(self, *args, **kwargs):
        try:
            tempdir = os.environ[b'PYTHON_TEST_TMP'] = str(tempfile.mkdtemp(suffix='-python-test'))
            return self.run_python_tests(*args, **kwargs)
        finally:
            import mozfile
            mozfile.remove(tempdir)

    def run_python_tests(self,
                         tests=None,
                         test_objects=None,
                         subsuite=None,
                         verbose=False,
                         jobs=None,
                         python=None,
                         exitfirst=False,
                         extra=None,
                         **kwargs):
        self._activate_test_virtualenvs(python)

        if test_objects is None:
            from moztest.resolve import TestResolver
            resolver = self._spawn(TestResolver)
            # If we were given test paths, try to find tests matching them.
            test_objects = resolver.resolve_tests(paths=tests, flavor='python')
        else:
            # We've received test_objects from |mach test|. We need to ignore
            # the subsuite because python-tests don't use this key like other
            # harnesses do and |mach test| doesn't realize this.
            subsuite = None

        mp = TestManifest()
        mp.tests.extend(test_objects)

        filters = []
        if subsuite == 'default':
            filters.append(mpf.subsuite(None))
        elif subsuite:
            filters.append(mpf.subsuite(subsuite))

        tests = mp.active_tests(
            filters=filters,
            disabled=False,
            python=self.virtualenv_manager.version_info[0],
            **mozinfo.info)

        if not tests:
            submsg = "for subsuite '{}' ".format(subsuite) if subsuite else ""
            message = "TEST-UNEXPECTED-FAIL | No tests collected " + \
                      "{}(Not in PYTHON_UNITTEST_MANIFESTS?)".format(submsg)
            self.log(logging.WARN, 'python-test', {}, message)
            return 1

        parallel = []
        sequential = []
        os.environ.setdefault('PYTEST_ADDOPTS', '')

        if extra:
            os.environ['PYTEST_ADDOPTS'] += " " + " ".join(extra)

        if exitfirst:
            sequential = tests
            os.environ['PYTEST_ADDOPTS'] += " -x"
        else:
            for test in tests:
                if test.get('sequential'):
                    sequential.append(test)
                else:
                    parallel.append(test)

        self.jobs = jobs or cpu_count()
        self.terminate = False
        self.verbose = verbose

        return_code = 0

        def on_test_finished(result):
            output, ret, test_path = result

            for line in output:
                self.log(logging.INFO, 'python-test', {'line': line.rstrip()}, '{line}')

            if ret and not return_code:
                self.log(logging.ERROR, 'python-test', {'test_path': test_path, 'ret': ret},
                         'Setting retcode to {ret} from {test_path}')
            return return_code or ret

        with ThreadPoolExecutor(max_workers=self.jobs) as executor:
            futures = [executor.submit(self._run_python_test, test)
                       for test in parallel]

            try:
                for future in as_completed(futures):
                    return_code = on_test_finished(future.result())
            except KeyboardInterrupt:
                # Hack to force stop currently running threads.
                # https://gist.github.com/clchiou/f2608cbe54403edb0b13
                executor._threads.clear()
                thread._threads_queues.clear()
                raise

        for test in sequential:
            return_code = on_test_finished(self._run_python_test(test))
            if return_code and exitfirst:
                break

        self.log(logging.INFO, 'python-test', {'return_code': return_code},
                 'Return code from mach python-test: {return_code}')
        return return_code

    def _activate_test_virtualenvs(self, python):
        """Make sure the test suite virtualenvs are set up and activated.

        Args:
            python: Optional python version string we want to run the suite with.
                See the `--python` argument to the `mach python-test` command.
        """
        from mozbuild.pythonutil import find_python3_executable

        default_manager = self.virtualenv_manager

        # Grab the default virtualenv properties before we activate other virtualenvs.
        python = python or default_manager.python_path
        py3_root = default_manager.virtualenv_root + '_py3'

        self.activate_pipenv(pipfile=None, populate=True, python=python)

        # The current process might be running under Python 2 and the Python 3
        # virtualenv will not be set up by mach bootstrap. To avoid problems in tests
        # that implicitly depend on the Python 3 virtualenv we ensure the Python 3
        # virtualenv is up to date before the tests start.
        python3, version = find_python3_executable(min_version='3.5.0')

        py3_manager = VirtualenvManager(
            default_manager.topsrcdir,
            default_manager.topobjdir,
            py3_root,
            default_manager.log_handle,
            default_manager.manifest_path,
        )
        py3_manager.ensure(python3)

    def _run_python_test(self, test):
        from mozprocess import ProcessHandler

        if test.get('requirements'):
            self.virtualenv_manager.install_pip_requirements(test['requirements'], quiet=True)

        output = []

        def _log(line):
            # Buffer messages if more than one worker to avoid interleaving
            if self.jobs > 1:
                output.append(line)
            else:
                self.log(logging.INFO, 'python-test', {'line': line.rstrip()}, '{line}')

        file_displayed_test = []  # used as boolean

        def _line_handler(line):
            if not file_displayed_test:
                output = ('Ran' in line or 'collected' in line or
                          line.startswith('TEST-'))
                if output:
                    file_displayed_test.append(True)

            # Hack to make sure treeherder highlights pytest failures
            if b'FAILED' in line.rsplit(b' ', 1)[-1]:
                line = line.replace(b'FAILED', b'TEST-UNEXPECTED-FAIL')

            _log(line)

        _log(test['path'])
        python = self.virtualenv_manager.python_path
        cmd = [python, test['path']]
        env = os.environ.copy()
        env[b'PYTHONDONTWRITEBYTECODE'] = b'1'

        # Homebrew on OS X will change Python's sys.executable to a custom value
        # which messes with mach's virtualenv handling code. Override Homebrew's
        # changes with the correct sys.executable value.
        env[b'PYTHONEXECUTABLE'] = python.encode('utf-8')

        proc = ProcessHandler(cmd, env=env, processOutputLine=_line_handler, storeOutput=False)
        proc.run()

        return_code = proc.wait()

        if not file_displayed_test:
            _log('TEST-UNEXPECTED-FAIL | No test output (missing mozunit.main() '
                 'call?): {}'.format(test['path']))

        if self.verbose:
            if return_code != 0:
                _log('Test failed: {}'.format(test['path']))
            else:
                _log('Test passed: {}'.format(test['path']))

        return output, return_code, test['path']