Mercurial > hg > config

annotate python/optparse_undefined.py @ 566:e3341b7ce4ef

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
binarysearch
author Jeff Hammel <jhammel@mozilla.com>
date Mon, 30 Dec 2013 12:22:13 -0800
parents 3efe894f9d79
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
193
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
1 #!/usr/bin/env python
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
2
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
3 """
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
4 illustrates usage of the undefined pattern from e.g.
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
5 http://k0s.org/mozilla/hg/bzconsole/file/tip/bzconsole/command.py
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
6
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
7 This is useful for scenarios similar to:
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
8 - you have base configuration in a file
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
9 - you have an OptionParser to read options in the command line
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
10 - the CLI options should overwrite the file configuration iff
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
11 the user specifies an option
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
12 """
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
13
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
14 from optparse import OptionParser
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
15
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
16 class Undefined(object):
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
17 def __init__(self, default):
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
18 self.default=default
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
19
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
20 class UndefinedOptionParser(OptionParser):
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
21
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
22 def add_option(self, *args, **kwargs):
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
23 kwargs['default'] = Undefined(kwargs.get('default'))
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
24 OptionParser.add_option(self, *args, **kwargs)
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
25
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
26 def parse_args(self, *args, **kwargs):
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
27 options, args = OptionParser.parse_args(self, *args, **kwargs)
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
28 return options, args
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
29
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
30 if __name__ == '__main__':
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
31
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
32 myparser = UndefinedOptionParser()
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
33 myparser.add_option("--foo", dest='foo', default='hello')
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
34 myparser.add_option("--bar", dest='bar', default='goodbye')
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
35 myparser.add_option("--baz", dest='baz', default='helloagain')
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
36 myparser.add_option("--fleem", dest='fleem', default='aufwiedersehen')
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
37
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
38 myconfiguration = {'foo': 'hi',
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
39 'bar': 'ciao'}
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
40 options, args = myparser.parse_args(['--foo', 'hello', '--baz', 'hola'])
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
41 for key, value in options.__dict__.items():
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
42 # XXX ideally you would move this to parse_args
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
43 if isinstance(value, Undefined):
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
44 options.__dict__[key] = myconfiguration.get(key, value.default)
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
45
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
46 assert options.foo == 'hello'
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
47 assert options.bar == 'ciao'
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
48 assert options.baz == 'hola'
3efe894f9d79 add a simple example for optparse_undefined
Jeff Hammel <jhammel@mozilla.com>
parents:
diff changeset
49 assert options.fleem == 'aufwiedersehen'