1# Copyright (c) 2011 Google Inc. All rights reserved.
2# Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met:
7#
8#     * Redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer.
10#     * Redistributions in binary form must reproduce the above
11# copyright notice, this list of conditions and the following disclaimer
12# in the documentation and/or other materials provided with the
13# distribution.
14#     * Neither the name of Google Inc. nor the names of its
15# contributors may be used to endorse or promote products derived from
16# this software without specific prior written permission.
17#
18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30"""In order for the multiprocessing module to spawn children correctly on
31Windows, we need to be running a Python module that can be imported
32(which means a file in sys.path that ends in .py). In addition, we need to
33ensure that sys.path / PYTHONPATH is set and propagating correctly.
34
35This module enforces that."""
36
37import os
38import subprocess
39import sys
40
41from webkitpy.common import version_check   # 'unused import' pylint: disable=W0611
42
43
44def run(*parts):
45    up = os.path.dirname
46    script_dir = up(up(up(os.path.abspath(__file__))))
47    env = os.environ
48    if 'PYTHONPATH' in env:
49        if script_dir not in env['PYTHONPATH']:
50            env['PYTHONPATH'] = env['PYTHONPATH'] + os.pathsep + script_dir
51    else:
52        env['PYTHONPATH'] = script_dir
53    module_path = os.path.join(script_dir, *parts)
54    cmd = [sys.executable, module_path] + sys.argv[1:]
55
56    proc = subprocess.Popen(cmd, env=env)
57    try:
58        proc.wait()
59    except KeyboardInterrupt:
60        # We need a second wait in order to make sure the subprocess exits fully.
61        # FIXME: It would be nice if we could put a timeout on this.
62        proc.wait()
63    sys.exit(proc.returncode)
64