media/webrtc/trunk/build/ios/clean_env.py@6474c204b198
media/webrtc/trunk/build/ios/clean_env.py
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rwxr-xr-x
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
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.
6 import os
7 import sys
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 )
28 # Need something to run.
29 # TODO(lliabraa): Make this output a usage string and exit (here and below).
30 assert(len(argv) > 0)
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(':')
38 # Still need something to run.
39 assert(len(argv) > 0)
41 clean_env = {}
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
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 += '/'
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)
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:]
68 # Still need something to run.
69 assert(len(args) > 0)
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
76 if __name__ == '__main__':
77 sys.exit(Main(sys.argv[1:]))
