| # Copyright 2017 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Utility methods.""" |
| |
| import atexit |
| import distutils.spawn |
| import logging |
| import os |
| import platform |
| import resource |
| import sys |
| |
| |
| SRC_ROOT = os.path.dirname(os.path.dirname(os.path.dirname(__file__))) |
| |
| |
| def AddCommonOptionsAndParseArgs(parser): |
| parser.add_argument('--no-pypy', action='store_true', |
| help='Do not automatically switch to pypy when available') |
| parser.add_argument('-v', |
| '--verbose', |
| default=0, |
| action='count', |
| help='Verbose level (multiple times for more)') |
| |
| args = parser.parse_args() |
| |
| logging.basicConfig(level=logging.WARNING - args.verbose * 10, |
| format='%(levelname).1s %(relativeCreated)6d %(message)s') |
| |
| if not args.no_pypy and platform.python_implementation() == 'CPython': |
| # Switch to pypy if it's available. |
| pypy_path = distutils.spawn.find_executable('pypy') |
| if pypy_path: |
| logging.debug('Switching to pypy.') |
| os.execv(pypy_path, [pypy_path] + sys.argv) |
| # NOTE! Running with python: 6s. Running with pypy: 3s |
| logging.warning('This script runs more than 2x faster if you install pypy.') |
| |
| if logging.getLogger().isEnabledFor(logging.DEBUG): |
| atexit.register(_LogPeakRamUsage) |
| return args |
| |
| |
| def _LogPeakRamUsage(): |
| peak_ram_usage = resource.getrusage(resource.RUSAGE_SELF).ru_maxrss |
| peak_ram_usage += resource.getrusage(resource.RUSAGE_CHILDREN).ru_maxrss |
| logging.info('Peak RAM usage was %d MB.', peak_ram_usage / 1024) |
