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#!/bin/sh

# 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 https://mozilla.org/MPL/2.0/.

# The beginning of this script is both valid shell and valid python,

# such that the script starts with the shell and is reexecuted with

# the right python.

''':' && if [ ! -z "$MSYSTEM" ] ; then exec python "$0" "$@" ; else which python3 > /dev/null 2> /dev/null && exec python3 "$0" "$@" || exec python "$0" "$@" ; fi

'''

from __future__ import print_function, unicode_literals

import os

import sys

# Check for the current python version as some users (especially on archlinux)

# may not have python 2 installed and their /bin/python binary symlinked to

# python 3.

if sys.version_info < (3, 5):

print("mach does not support python 3 (< 3.5), please install python 3 (>= 3.5)")

sys.exit(1)

def main(args):

topdir = os.path.abspath(os.path.dirname(sys.argv[0]))

sys.path.insert(0, os.path.join(topdir, "python"))

import mach_bootstrap

if len(sys.argv) > 1 and sys.argv[1] == "bootstrap":

sys.exit(mach_bootstrap.bootstrap_command_only(topdir))

else:

mach = mach_bootstrap.bootstrap(topdir)

sys.exit(mach.run(sys.argv[1:]))

if __name__ == '__main__':

sys.dont_write_bytecode = True

if sys.platform == 'win32' and sys.version_info < (3, 4):

# This is a complete hack to work around the fact that Windows

# multiprocessing needs to import the original module (ie: this

# file), but only works if it has a .py extension.

# We do this by a sort of two-level function interposing. The first

# level interposes forking.get_command_line() with our version defined

# in my_get_command_line(). Our version of get_command_line will

# replace the command string with the contents of the fork_interpose()

# function to be used in the subprocess.

# The subprocess then gets an interposed imp.find_module(), which we

# hack up to find 'mach' without the .py extension, since we already

# know where it is (it's us!). If we're not looking for 'mach', then

# the original find_module will suffice.

# See also: http://bugs.python.org/issue19946

# And: https://bugzilla.mozilla.org/show_bug.cgi?id=914563

# XXX In Python 3.4 the multiprocessing module was re-written and the

# below code is no longer valid. The Python issue19946 also claims to

# be fixed in this version. It's not clear whether this hack is still

# needed in 3.4+ or not, but at least some basic mach commands appear

# to work without it. So skip it in 3.4+ until we determine it's still

# needed.

import inspect

from multiprocessing import forking

global orig_command_line

def fork_interpose():

import imp

import os

import sys

orig_find_module = imp.find_module

def my_find_module(name, dirs):

if name == 'mach':

path = os.path.join(dirs[0], 'mach')

f = open(path)

return (f, path, ('', 'r', imp.PY_SOURCE))

return orig_find_module(name, dirs)

# Don't allow writing bytecode file for mach module.

orig_load_module = imp.load_module

def my_load_module(name, file, path, description):

# multiprocess.forking invokes imp.load_module manually and

# hard-codes the name __parents_main__ as the module name.

if name == '__parents_main__':

old_bytecode = sys.dont_write_bytecode

sys.dont_write_bytecode = True

try:

return orig_load_module(name, file, path, description)

finally:

sys.dont_write_bytecode = old_bytecode

return orig_load_module(name, file, path, description)

imp.find_module = my_find_module

imp.load_module = my_load_module

from multiprocessing.forking import main; main()

def my_get_command_line():

fork_code, lineno = inspect.getsourcelines(fork_interpose)

# Remove the first line (for 'def fork_interpose():') and the three

# levels of indentation (12 spaces).

fork_string = ''.join(x[12:] for x in fork_code[1:])

cmdline = orig_command_line()

cmdline[2] = fork_string

return cmdline

orig_command_line = forking.get_command_line

forking.get_command_line = my_get_command_line

main(sys.argv)

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