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annotate gamelib/config.py @ 459:e9393970b5f6

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author Adrianna Pińska <adrianna.pinska@gmail.com>
date Mon, 23 Nov 2009 20:12:03 +0000
parents 03d5cb669298
children 8897a436a8cb
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1 # level.py
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2
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3 from ConfigParser import RawConfigParser
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4 from optparse import OptionParser
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5
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6 class Config(object):
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7 """Container for various global configuration knobs and levers."""
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8
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9 valid_options = {
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10 'sound': {'type': 'boolean', 'default': 'true'},
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11 'level_name': {'type': 'string', 'default': 'two_weeks'},
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12 }
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13
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14 config_filename = 'config.ini'
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15
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16 def configure(self, params=None):
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17 self._config = RawConfigParser(dict(
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18 [(k, v['default']) for k, v in self.valid_options.items() if 'default' in v]
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19 ))
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20 self._config.add_section('Options')
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21 self._set_up_params(params)
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22 self._config.read(self.config_filename)
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23 self._process_params()
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24
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25 def _set_up_params(self, params):
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26 parser = OptionParser()
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27 parser.add_option("-c", "--config", metavar="FILE", dest="config_filename",
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28 help="read configuration from FILE")
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29 parser.add_option("-l", "--level", metavar="LEVEL", dest="level_name",
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30 help="select level LEVEL")
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31 parser.add_option("--sound", action="store_const", const="on", dest="sound",
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32 help="enable sound")
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33 parser.add_option("--no-sound", action="store_const", const="off", dest="sound",
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34 help="disable sound")
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35 (self._opts, _) = parser.parse_args(params or [])
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36 self.config_filename = self._opts.config_filename or self.config_filename
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37
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38 def _process_params(self):
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39 for name in self.valid_options:
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40 opt = getattr(self._opts, name)
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41 if opt is not None:
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42 self._config.set('Options', name, opt)
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43
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44 def __getattr__(self, name):
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45 if name not in self.valid_options:
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46 raise AttributeError(name)
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47 get_methods = {
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48 'string': lambda n: self._config.get('Options', n),
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49 'boolean': lambda n: self._config.getboolean('Options', n),
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50 }
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51 return get_methods[self.valid_options[name].get('type', 'string')](name)
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52
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53 # Here's a global variable. Don't try this at home, kids!
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54 config = Config()