Begin implementation of new plugin list retrieval

lodel/plugin/datasource_plugin.py

@@ -1,5 +1,6 @@
 from .plugins import Plugin
 from .exceptions import *
+from lodel.settings.validator import SettingValidator
 
 ##@brief Designed to handles datasources plugins
 #
@@ -10,6 +11,13 @@ from .exceptions import *
 #@todo Refactor and rewrite lodel2 datasource handling
 class DatasourcePlugin(Plugin):
     
+    ##@brief Stores confspecs indicating where DatasourcePlugin list is stored
+    _plist_confspecs = {
+        'section': 'lodel2',
+        'key': 'datasources',
+        'default': None,
+        'validator': SettingValidator('list', none_is_valid = False) }
+    
     def __init__(self, name):
         super().__init__(name)
         self.__datasource_cls = None
@@ -22,6 +30,10 @@ class DatasourcePlugin(Plugin):
     def migration_handler(self):
         return self.loader_module().migration_handler_class()
 
+    @classmethod
+    def plist_confspec(cls):
+        return copy.copy(cls._plist_confspecs)
+
     ##@brief Return an initialized Datasource instance
     #@param ds_name str : The name of the datasource to instanciate
     #@param ro bool

lodel/plugin/plugins.py

@@ -430,6 +430,21 @@ name differ from the one found in plugin's init file"
     def confspecs(self):
         return copy.copy(self.__confspecs)
 
+    ##@brief Retrieves plugin list confspecs
+    #
+    #This method ask for each Plugin child class the confspecs specifying where
+    #the wanted plugin list is stored. (For example DatasourcePlugin expect
+    #that a list of ds plugin to load stored in lodel2 section, datasources key
+    # etc...
+    @classmethod
+    def plugin_list_confspec(cls):
+        from lodel.settings.validator import confspec_append
+        res = dict()
+        for pcls in cls.plugin_types():
+            plcs = pcls.plist_confspec()
+            confspec_append(res, plcs)
+        return res
+
     ##@brief Attempt to read plugin discover cache
     #@note If no cache yet make a discover with default plugin directory
     #@return a dict (see @ref _discover() )

lodel/settings/settings.py

@@ -128,7 +128,7 @@ class Settings(object, metaclass=MetaSettings):
         confkey=confname.rpartition('.')
         loader.setoption(confkey[0], confkey[2], confvalue, validator)
 
-    ##@brief This method handlers Settings instance bootstraping
+    ##@brief This method handles Settings instance bootstraping
     def __bootstrap(self):
         logger.debug("Settings bootstraping")
         lodel2_specs = LODEL2_CONF_SPECS

lodel/settings/validator.py

@@ -352,6 +352,23 @@ SettingValidator.create_re_validator(
 #   Lodel 2 configuration specification
 #
 
+##@brief Append a piece of confspec
+#@note orig is modified during the process
+#@param orig dict : the confspec to update
+#@param upd dict : the confspec to add
+#@return new confspec
+def confspec_append(orig, upd):
+    for section in orig:
+        if section in upd:
+            orig[section].update(upd[section])
+        else:
+            orig[section] = upd[section]
+    return orig
+
+def confspec_add(orig, section, key, default, validator):
+    if section not in orig:
+        section[orig] = dict()
+
 ##@brief Global specifications for lodel2 settings
 LODEL2_CONF_SPECS = {
     'lodel2': {