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🎥 Command line media player
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374from waflib.Options import OptionsContextimport optparse
class Feature(object): def __init__(self, group, feature): self.group = group self.identifier, self.attributes = feature['name'], feature
def add_options(self): [self.add_option(option_rule) for option_rule in self.option_rules()]
def add_option(self, rule): self.group.add_option(self.option(rule['state']), action=rule['action'], default=rule['default'], dest=self.storage(), help=self.help(rule['state']))
# private def option_rules(self): return { 'autodetect': [ {'state': 'disable', 'action': 'store_false', 'default': None}, {'state': 'enable', 'action': 'store_true', 'default': None}, ], 'disable': [ {'state': 'disable', 'action': 'store_false', 'default': False}, {'state': 'enable', 'action': 'store_true', 'default': False}, ], 'enable': [ {'state': 'disable', 'action': 'store_false', 'default': True}, ], }[self.behaviour()]
def behaviour(self): if 'default' in self.attributes: return self.attributes['default'] else: return 'autodetect'
def option(self, state): return "--{0}-{1}".format(state, self.identifier)
def help(self, state): default = self.behaviour() if (default, state) == ("autodetect", "enable") or default == state: return optparse.SUPPRESS_HELP return "{0} {1} [{2}]" \ .format(state, self.attributes['desc'], default)
def storage(self): return "enable_{0}".format(self.identifier)
def add_feature(group, feature): Feature(group, feature).add_options()
def parse_features(opt, group_name, features): def is_feature(dep): return dep['name'].find('--') >= 0
def strip_feature(dep): dep['name'] = dep['name'].lstrip('-') return dep
features = [strip_feature(dep) for dep in features if is_feature(dep)] group = opt.get_option_group(group_name) if not group: group = opt.add_option_group(group_name) [add_feature(group, feature) for feature in features]
OptionsContext.parse_features = parse_features