78 строки
2.2 KiB
Python
Executable File
78 строки
2.2 KiB
Python
Executable File
#!/usr/bin/python
|
|
# Copyright (c) 2012 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.
|
|
|
|
import os
|
|
import sys
|
|
|
|
def Main(argv):
|
|
"""This is like 'env -i', but it uses a whitelist of env variables to allow
|
|
through to the command being run. It attempts to strip off Xcode-added
|
|
values from PATH.
|
|
"""
|
|
# Note: An attempt was made to do something like: env -i bash -lc '[command]'
|
|
# but that fails to set the things set by login (USER, etc.), so instead
|
|
# the only approach that seems to work is to have a whitelist.
|
|
env_key_whitelist = (
|
|
'HOME',
|
|
'LOGNAME',
|
|
# 'PATH' added below (but filtered).
|
|
'PWD',
|
|
'SHELL',
|
|
'TEMP',
|
|
'TMPDIR',
|
|
'USER'
|
|
)
|
|
|
|
# Need something to run.
|
|
# TODO(lliabraa): Make this output a usage string and exit (here and below).
|
|
assert(len(argv) > 0)
|
|
|
|
add_to_path = [];
|
|
first_entry = argv[0];
|
|
if first_entry.startswith('ADD_TO_PATH='):
|
|
argv = argv[1:];
|
|
add_to_path = first_entry.replace('ADD_TO_PATH=', '', 1).split(':')
|
|
|
|
# Still need something to run.
|
|
assert(len(argv) > 0)
|
|
|
|
clean_env = {}
|
|
|
|
# Pull over the whitelisted keys.
|
|
for key in env_key_whitelist:
|
|
val = os.environ.get(key, None)
|
|
if not val is None:
|
|
clean_env[key] = val
|
|
|
|
# Collect the developer dir as set via Xcode, defaulting it.
|
|
dev_prefix = os.environ.get('DEVELOPER_DIR', '/Developer/')
|
|
if dev_prefix[-1:] != '/':
|
|
dev_prefix += '/'
|
|
|
|
# Now pull in PATH, but remove anything Xcode might have added.
|
|
initial_path = os.environ.get('PATH', '')
|
|
filtered_chunks = \
|
|
[x for x in initial_path.split(':') if not x.startswith(dev_prefix)]
|
|
if filtered_chunks:
|
|
clean_env['PATH'] = ':'.join(add_to_path + filtered_chunks)
|
|
|
|
# Add any KEY=VALUE args before the command to the cleaned environment.
|
|
args = argv[:]
|
|
while '=' in args[0]:
|
|
(key, val) = args[0].split('=', 1)
|
|
clean_env[key] = val
|
|
args = args[1:]
|
|
|
|
# Still need something to run.
|
|
assert(len(args) > 0)
|
|
|
|
# Off it goes...
|
|
os.execvpe(args[0], args, clean_env)
|
|
# Should never get here, so return a distinctive, non-zero status code.
|
|
return 66
|
|
|
|
if __name__ == '__main__':
|
|
sys.exit(Main(sys.argv[1:]))
|