feat(native): Support explicit @config("<name>") annotations

Author: paveltiunov

packages/cubejs-backend-native/python/cube/src/conf/__init__.py

@@ -125,6 +125,9 @@ def __init__(self):
         self.orchestrator_options = None
 
     def __call__(self, func):
+        if isinstance(func, str):
+            return AttrRef(self, func)
+
         if not callable(func):
             raise ConfigurationException("@config decorator must be used with functions, actual: '%s'" % type(func).__name__)
 
@@ -133,6 +136,25 @@ def __call__(self, func):
         else:
             raise ConfigurationException("Unknown configuration property: '%s'" % func.__name__)
 
+class AttrRef:
+    config: Configuration
+    attribute: str
+
+    def __init__(self, config: Configuration, attribue: str):
+        self.config = config
+        self.attribute = attribue
+
+    def __call__(self, func):
+        if not callable(func):
+            raise ConfigurationException("@config decorator must be used with functions, actual: '%s'" % type(func).__name__)
+
+        if hasattr(self.config, self.attribute):
+            setattr(self.config, self.attribute, func)
+        else:
+            raise ConfigurationException("Unknown configuration property: '%s'" % func.__name__)
+
+        return func
+
 config = Configuration()
 # backward compatibility
 settings = config