Option.force_default() -> opt value returns the default value

tiramisu/config.py

@@ -245,8 +245,8 @@ class Config(object):
                 else:
                     _result = result
                 return _result
-        # mandatory options
         if not isinstance(opt_or_descr, OptionDescription):
+            # mandatory options
             homeconfig = self._cfgimpl_get_toplevel()
             mandatory = homeconfig._cfgimpl_mandatory
             if opt_or_descr.is_mandatory() and mandatory:
@@ -254,6 +254,10 @@ class Config(object):
                   and opt_or_descr.getdefault() == None:
                     raise MandatoryError("option: {0} is mandatory " 
                                           "and shall have a value".format(name))
+            # frozen and force default
+            if opt_or_descr.is_forced_on_freeze():
+                return opt_or_descr.getdefault()
+        
         return self._cfgimpl_values[name]
                 
     def __dir__(self):

tiramisu/option.py

@@ -83,6 +83,7 @@ class Multi(list):
 class Option(HiddenBaseType, DisabledBaseType):
     #reminder: an Option object is **not** a container for the value
     _frozen = False
+    _force_default_on_freeze = False
     def __init__(self, name, doc, default=None, default_multi=None, 
                  requires=None, mandatory=False, multi=False, callback=None, 
                  callback_params=None):
@@ -141,6 +142,15 @@ class Option(HiddenBaseType, DisabledBaseType):
     def getdefault(self):
         return self.default
 
+    def force_default(self):
+        self._force_default_on_freeze = True
+
+    def is_forced_on_freeze(self):
+        if self._frozen and self._force_default_on_freeze:
+            return True
+        else: 
+            return False
+
     def getdoc(self):
         return self.doc
 
@@ -372,7 +382,8 @@ class ArbitraryOption(Option):
         return self.default
 
 class OptionDescription(HiddenBaseType, DisabledBaseType):
-    
+    group_type = 'default'
+
     def __init__(self, name, doc, children, requires=None):
         self._name = name
         self.doc = doc
@@ -380,8 +391,7 @@ class OptionDescription(HiddenBaseType, DisabledBaseType):
         self._requires = requires
         self._build()
         self.properties = [] # 'hidden', 'disabled'...
-        self.group_type = 'default'
-
+        
     def getdoc(self):
         return self.doc