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      1 # Copyright (c) 2011 Google Inc. All rights reserved.
      2 # Copyright (C) 2010 Chris Jerdonek (cjerdonek (at] 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
     31 Windows, 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
     33 ensure that sys.path / PYTHONPATH is set and propagating correctly.
     34 
     35 This module enforces that."""
     36 
     37 import os
     38 import subprocess
     39 import sys
     40 
     41 from webkitpy.common import version_check   # 'unused import' pylint: disable=W0611
     42 
     43 
     44 def 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