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1 #!/usr/bin/python | 1 #!/usr/bin/python |
2 # Copyright 2013 The Chromium Authors. All rights reserved. | 2 # Copyright 2013 The Chromium Authors. All rights reserved. |
3 # Use of this source code is governed by a BSD-style license that can be | 3 # Use of this source code is governed by a BSD-style license that can be |
4 # found in the LICENSE file. | 4 # found in the LICENSE file. |
5 | 5 |
6 # This script can either source a file and dump the enironment changes done by | 6 # This script can either source a file and dump the enironment changes done by |
7 # it, or just simply dump the current environment as JSON into a file. | 7 # it, or just simply dump the current environment as JSON into a file. |
8 | 8 |
9 import json | 9 import json |
10 import optparse | 10 import optparse |
11 import os | 11 import os |
12 import pipes | 12 import pipes |
13 import subprocess | 13 import subprocess |
14 import sys | 14 import sys |
15 | 15 |
16 | 16 |
17 def main(): | 17 def main(): |
18 parser = optparse.OptionParser() | 18 parser = optparse.OptionParser() |
19 parser.add_option('-f', '--output-json', | 19 parser.add_option('-f', '--output-json', |
20 help='File to dump the environment as JSON into.') | 20 help='File to dump the environment as JSON into.') |
21 parser.add_option( | 21 parser.add_option( |
22 '-d', '--dump-mode', action='store_true', | 22 '-d', '--dump-mode', action='store_true', |
23 help='Dump the environment to the file and exit immediately.') | 23 help='Dump the environment to sys.stdout and exit immediately.') |
24 | 24 |
25 options, args = parser.parse_args() | 25 options, args = parser.parse_args() |
26 if not options.output_json: | 26 if options.dump_mode: |
27 parser.error('Requires --output-json option.') | 27 if args or options.output_json: |
| 28 parser.error('Cannot specify args or --output-json with --dump-mode.') |
| 29 json.dump(dict(os.environ), sys.stdout) |
| 30 else: |
| 31 if not options.output_json: |
| 32 parser.error('Requires --output-json option.') |
28 | 33 |
29 if options.dump_mode: | |
30 if args: | |
31 parser.error("Cannot specify args with --dump-mode") | |
32 with open(options.output_json, 'w') as f: | |
33 json.dump(dict(os.environ), f) | |
34 else: | |
35 envsetup_cmd = ' '.join(map(pipes.quote, args)) | 34 envsetup_cmd = ' '.join(map(pipes.quote, args)) |
36 full_cmd = [ | 35 full_cmd = [ |
37 'bash', '-c', | 36 'bash', '-c', |
38 '. %s; %s -d -f %s' % (envsetup_cmd, os.path.abspath(__file__), | 37 '. %s > /dev/null; %s -d' % (envsetup_cmd, os.path.abspath(__file__)) |
39 options.output_json) | |
40 ] | 38 ] |
41 ret = subprocess.call(full_cmd) | 39 try: |
42 if ret: | 40 output = subprocess.check_output(full_cmd) |
43 sys.exit('Error running %s and dumping env' % envsetup_cmd) | 41 except Exception as e: |
| 42 sys.exit('Error running %s and dumping environment.' % envsetup_cmd) |
| 43 |
| 44 env_diff = {} |
| 45 new_env = json.loads(output) |
| 46 for k, val in new_env.items(): |
| 47 if k == '_' or (k in os.environ and os.environ[k] == val): |
| 48 continue |
| 49 env_diff[k] = val |
| 50 with open(options.output_json, 'w') as f: |
| 51 json.dump(env_diff, f) |
44 | 52 |
45 | 53 |
46 if __name__ == '__main__': | 54 if __name__ == '__main__': |
47 sys.exit(main()) | 55 sys.exit(main()) |
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