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from waflib.Options import OptionsContext
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):
return "{0} {1} [{2}]" \
.format(state, self.attributes['desc'], self.behaviour())
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
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