media/webrtc/trunk/build/ios/clean_env.py@6474c204b198 (annotated)
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.
| michael@0 | 1 | #!/usr/bin/python |
| michael@0 | 2 | # Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| michael@0 | 3 | # Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 4 | # found in the LICENSE file. |
| michael@0 | 5 | |
| michael@0 | 6 | import os |
| michael@0 | 7 | import sys |
| michael@0 | 8 | |
| michael@0 | 9 | def Main(argv): |
| michael@0 | 10 | """This is like 'env -i', but it uses a whitelist of env variables to allow |
| michael@0 | 11 | through to the command being run. It attempts to strip off Xcode-added |
| michael@0 | 12 | values from PATH. |
| michael@0 | 13 | """ |
| michael@0 | 14 | # Note: An attempt was made to do something like: env -i bash -lc '[command]' |
| michael@0 | 15 | # but that fails to set the things set by login (USER, etc.), so instead |
| michael@0 | 16 | # the only approach that seems to work is to have a whitelist. |
| michael@0 | 17 | env_key_whitelist = ( |
| michael@0 | 18 | 'HOME', |
| michael@0 | 19 | 'LOGNAME', |
| michael@0 | 20 | # 'PATH' added below (but filtered). |
| michael@0 | 21 | 'PWD', |
| michael@0 | 22 | 'SHELL', |
| michael@0 | 23 | 'TEMP', |
| michael@0 | 24 | 'TMPDIR', |
| michael@0 | 25 | 'USER' |
| michael@0 | 26 | ) |
| michael@0 | 27 | |
| michael@0 | 28 | # Need something to run. |
| michael@0 | 29 | # TODO(lliabraa): Make this output a usage string and exit (here and below). |
| michael@0 | 30 | assert(len(argv) > 0) |
| michael@0 | 31 | |
| michael@0 | 32 | add_to_path = []; |
| michael@0 | 33 | first_entry = argv[0]; |
| michael@0 | 34 | if first_entry.startswith('ADD_TO_PATH='): |
| michael@0 | 35 | argv = argv[1:]; |
| michael@0 | 36 | add_to_path = first_entry.replace('ADD_TO_PATH=', '', 1).split(':') |
| michael@0 | 37 | |
| michael@0 | 38 | # Still need something to run. |
| michael@0 | 39 | assert(len(argv) > 0) |
| michael@0 | 40 | |
| michael@0 | 41 | clean_env = {} |
| michael@0 | 42 | |
| michael@0 | 43 | # Pull over the whitelisted keys. |
| michael@0 | 44 | for key in env_key_whitelist: |
| michael@0 | 45 | val = os.environ.get(key, None) |
| michael@0 | 46 | if not val is None: |
| michael@0 | 47 | clean_env[key] = val |
| michael@0 | 48 | |
| michael@0 | 49 | # Collect the developer dir as set via Xcode, defaulting it. |
| michael@0 | 50 | dev_prefix = os.environ.get('DEVELOPER_DIR', '/Developer/') |
| michael@0 | 51 | if dev_prefix[-1:] != '/': |
| michael@0 | 52 | dev_prefix += '/' |
| michael@0 | 53 | |
| michael@0 | 54 | # Now pull in PATH, but remove anything Xcode might have added. |
| michael@0 | 55 | initial_path = os.environ.get('PATH', '') |
| michael@0 | 56 | filtered_chunks = \ |
| michael@0 | 57 | [x for x in initial_path.split(':') if not x.startswith(dev_prefix)] |
| michael@0 | 58 | if filtered_chunks: |
| michael@0 | 59 | clean_env['PATH'] = ':'.join(add_to_path + filtered_chunks) |
| michael@0 | 60 | |
| michael@0 | 61 | # Add any KEY=VALUE args before the command to the cleaned environment. |
| michael@0 | 62 | args = argv[:] |
| michael@0 | 63 | while '=' in args[0]: |
| michael@0 | 64 | (key, val) = args[0].split('=', 1) |
| michael@0 | 65 | clean_env[key] = val |
| michael@0 | 66 | args = args[1:] |
| michael@0 | 67 | |
| michael@0 | 68 | # Still need something to run. |
| michael@0 | 69 | assert(len(args) > 0) |
| michael@0 | 70 | |
| michael@0 | 71 | # Off it goes... |
| michael@0 | 72 | os.execvpe(args[0], args, clean_env) |
| michael@0 | 73 | # Should never get here, so return a distinctive, non-zero status code. |
| michael@0 | 74 | return 66 |
| michael@0 | 75 | |
| michael@0 | 76 | if __name__ == '__main__': |
| michael@0 | 77 | sys.exit(Main(sys.argv[1:])) |
