mach
author Ryan VanderMeulen <ryanvm@gmail.com>
Fri, 01 Sep 2017 15:37:08 -0400
changeset 430269 1d02aa80f2f8c283428f0a8a6310e7d1fec3936c
parent 374253 1f85e7bfe97d54892bc08f3d5a80e9bab52f0189
child 553786 d5ef7a5e02a4d12e6349beb11a2cee666ea75b44
permissions -rwxr-xr-x
Backed out 9 changesets (bug 1383880) for decision task bustage. Backed out changeset 53f5d47a7cb0 (bug 1383880) Backed out changeset a0abda41172a (bug 1383880) Backed out changeset 729a7e2091e8 (bug 1383880) Backed out changeset a33f5a14a471 (bug 1383880) Backed out changeset 5b10d321cfee (bug 1383880) Backed out changeset 8056488d8aed (bug 1383880) Backed out changeset e62c90e3c1e8 (bug 1383880) Backed out changeset 91f116ce6c2a (bug 1383880) Backed out changeset 045498bc36c4 (bug 1383880)

#!/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 http://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.
'''which' python2.7 > /dev/null && exec python2.7 "$0" "$@" || exec python "$0" "$@"
'''

from __future__ import print_function, unicode_literals

import os
import sys

def ancestors(path):
    while path:
        yield path
        (path, child) = os.path.split(path)
        if child == "":
            break

def load_mach(dir_path, mach_path):
    import imp
    with open(mach_path, 'r') as fh:
        imp.load_module('mach_bootstrap', fh, mach_path,
                        ('.py', 'r', imp.PY_SOURCE))
    import mach_bootstrap
    return mach_bootstrap.bootstrap(dir_path)


def check_and_get_mach(dir_path):
    bootstrap_paths = (
        'build/mach_bootstrap.py',
        # test package bootstrap
        'tools/mach_bootstrap.py',
    )
    for bootstrap_path in bootstrap_paths:
        mach_path = os.path.join(dir_path, bootstrap_path)
        if os.path.isfile(mach_path):
            return load_mach(dir_path, mach_path)
    return None


def get_mach():
    # Check whether the current directory is within a mach src or obj dir.
    for dir_path in ancestors(os.getcwd()):
        # If we find a "config.status" and "mozinfo.json" file, we are in the objdir.
        config_status_path = os.path.join(dir_path, 'config.status')
        mozinfo_path = os.path.join(dir_path, 'mozinfo.json')
        if os.path.isfile(config_status_path) and os.path.isfile(mozinfo_path):
            import json
            info = json.load(open(mozinfo_path))
            if 'mozconfig' in info and 'MOZCONFIG' not in os.environ:
                # If the MOZCONFIG environment variable is not already set, set it
                # to the value from mozinfo.json.  This will tell the build system
                # to look for a config file at the path in $MOZCONFIG rather than
                # its default locations.
                #
                # Note: subprocess requires native strings in os.environ on Windows
                os.environ[b'MOZCONFIG'] = str(info['mozconfig'])

            if 'topsrcdir' in info:
                # Continue searching for mach_bootstrap in the source directory.
                dir_path = info['topsrcdir']

        mach = check_and_get_mach(dir_path)
        if mach:
            return mach

    # If we didn't find a source path by scanning for a mozinfo.json, check
    # whether the directory containing this script is a source directory. We
    # follow symlinks so mach can be run even if cwd is outside the srcdir.
    return check_and_get_mach(os.path.dirname(os.path.realpath(__file__)))

def main(args):
    mach = get_mach()
    if not mach:
        print('Could not run mach: No mach source directory found.')
        sys.exit(1)
    sys.exit(mach.run(args))


if __name__ == '__main__':
    main(sys.argv[1:])