def _clean_tree(self):
# Read all variables.
variables = self.cfgtree.find('variables')
if variables is not None:
for element in variables:
varname = element.tag.strip()
value = resolve_variables(self.variables, element.text)
self.variables[varname] = value
# Resolve variables everywhere.
for element in self.cfgtree.iter():
if element.tag is etree.Comment:
continue
element.text = self._resolve(element.text)
for attr in element.attrib:
value = element.attrib[attr]
element.attrib[attr] = self._resolve(value)
def _resolve(self, text):
if not self.resolve:
return text
if text is None:
return None
return resolve_variables(self.variables, text.strip())