1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
#!/usr/bin/env python
from ConfigParser import ConfigParser, NoSectionError
from random import getrandbits
import sys
def update_config(parser, items):
configurable = set(['session.secret', 'mongo.host', 'mongo.port'])
for key, value in items:
if key not in configurable:
continue
parser.set('app:main', key, value)
def read_config(files):
new_config = ConfigParser()
new_config.read(files)
return new_config
def write_new_config(changes, default, override, target):
new_config = read_config([default, override])
old_config = read_config(target)
try:
update_config(new_config, old_config.items('app:main', raw=True))
except NoSectionError:
pass
update_config(new_config, changes)
if new_config.get('app:main', 'session.secret') == '':
new_config.set('app:main', 'session.secret', str(getrandbits(32)))
with open(target, 'w') as output:
new_config.write(output)
class UsageError(Exception):
"""An error triggered by incorrect usage"""
def main():
if len(sys.argv) < 4:
raise UsageError('Usage: %s DEFAULTS OVERRIDES TARGET [HOST [PORT]]')
changes = {}
if len(sys.argv) > 4:
changes['mongo.host'] = sys.argv[4]
if len(sys.argv) > 5:
changes['mongo.port'] = sys.argv[5]
parser = write_new_config(changes.items(), default=sys.argv[1],
override=sys.argv[2], target=sys.argv[3])
if __name__ == '__main__':
try:
main()
except UsageError as e:
sys.stderr.write(str(e))
sys.exit(1)
|