The Tor Browser / file comparison
comparison: media/webrtc/trunk/build/ios/clean_env.py
media/webrtc/trunk/build/ios/clean_env.py
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
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| -1:000000000000 | 0:7644ca423e38 |
|---|---|
| 1 #!/usr/bin/python | |
| 2 # Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 3 # Use of this source code is governed by a BSD-style license that can be | |
| 4 # found in the LICENSE file. | |
| 5 | |
| 6 import os | |
| 7 import sys | |
| 8 | |
| 9 def Main(argv): | |
| 10 """This is like 'env -i', but it uses a whitelist of env variables to allow | |
| 11 through to the command being run. It attempts to strip off Xcode-added | |
| 12 values from PATH. | |
| 13 """ | |
| 14 # Note: An attempt was made to do something like: env -i bash -lc '[command]' | |
| 15 # but that fails to set the things set by login (USER, etc.), so instead | |
| 16 # the only approach that seems to work is to have a whitelist. | |
| 17 env_key_whitelist = ( | |
| 18 'HOME', | |
| 19 'LOGNAME', | |
| 20 # 'PATH' added below (but filtered). | |
| 21 'PWD', | |
| 22 'SHELL', | |
| 23 'TEMP', | |
| 24 'TMPDIR', | |
| 25 'USER' | |
| 26 ) | |
| 27 | |
| 28 # Need something to run. | |
| 29 # TODO(lliabraa): Make this output a usage string and exit (here and below). | |
| 30 assert(len(argv) > 0) | |
| 31 | |
| 32 add_to_path = []; | |
| 33 first_entry = argv[0]; | |
| 34 if first_entry.startswith('ADD_TO_PATH='): | |
| 35 argv = argv[1:]; | |
| 36 add_to_path = first_entry.replace('ADD_TO_PATH=', '', 1).split(':') | |
| 37 | |
| 38 # Still need something to run. | |
| 39 assert(len(argv) > 0) | |
| 40 | |
| 41 clean_env = {} | |
| 42 | |
| 43 # Pull over the whitelisted keys. | |
| 44 for key in env_key_whitelist: | |
| 45 val = os.environ.get(key, None) | |
| 46 if not val is None: | |
| 47 clean_env[key] = val | |
| 48 | |
| 49 # Collect the developer dir as set via Xcode, defaulting it. | |
| 50 dev_prefix = os.environ.get('DEVELOPER_DIR', '/Developer/') | |
| 51 if dev_prefix[-1:] != '/': | |
| 52 dev_prefix += '/' | |
| 53 | |
| 54 # Now pull in PATH, but remove anything Xcode might have added. | |
| 55 initial_path = os.environ.get('PATH', '') | |
| 56 filtered_chunks = \ | |
| 57 [x for x in initial_path.split(':') if not x.startswith(dev_prefix)] | |
| 58 if filtered_chunks: | |
| 59 clean_env['PATH'] = ':'.join(add_to_path + filtered_chunks) | |
| 60 | |
| 61 # Add any KEY=VALUE args before the command to the cleaned environment. | |
| 62 args = argv[:] | |
| 63 while '=' in args[0]: | |
| 64 (key, val) = args[0].split('=', 1) | |
| 65 clean_env[key] = val | |
| 66 args = args[1:] | |
| 67 | |
| 68 # Still need something to run. | |
| 69 assert(len(args) > 0) | |
| 70 | |
| 71 # Off it goes... | |
| 72 os.execvpe(args[0], args, clean_env) | |
| 73 # Should never get here, so return a distinctive, non-zero status code. | |
| 74 return 66 | |
| 75 | |
| 76 if __name__ == '__main__': | |
| 77 sys.exit(Main(sys.argv[1:])) |
