Load recursive sources/filters

doc/denite.txt

@@ -1786,7 +1786,7 @@ converter_relative_word
 CREATE SOURCE						*denite-create-source*
 
 To create source, you should read default sources implementation in
-rplugin/python3/denite/source/*.py.
+rplugin/python3/denite/source/**/*.py.
 
 The files are automatically loaded and denite creates new Source class object.
 Source class must extend Base class in ".base".
@@ -1946,7 +1946,7 @@ CREATE KIND						*denite-create-kind*
 
 Custom Kind can be created to contain extra actions for your custom source.
 Before create your new kind, you should have a look at existing kinds in
-rplugin/python3/denite/kind/*.py
+rplugin/python3/denite/kind/**/*.py
 
 Instead of create new kind from scratch, you can extend one of the existing
 Kind class, let's take "openable" for example: >
@@ -2030,7 +2030,7 @@ action_{name} (Function) 			(Optional)
 CREATE FILTER						*denite-create-filter*
 
 To create filter, you should read default filters implementation in
-rplugin/python3/denite/filter/*.py.
+rplugin/python3/denite/filter/**/*.py.
 
 The files are automatically loaded and denite creates new Filter class object.
 Filter class must extend Base class in ".base".

rplugin/python3/denite/util.py

@@ -175,9 +175,9 @@ def find_rplugins(context, source, loaded_paths):
     Searches $VIMRUNTIME/*/rplugin/python3/denite/$source/
     """
 
-    src = join('rplugin/python3/denite', source, '*.py')
+    src = join('rplugin/python3/denite', source, '**/*.py')
     for runtime in context.get('runtimepath', '').split(','):
-        for path in glob.iglob(os.path.join(runtime, src)):
+        for path in glob.iglob(os.path.join(runtime, src), recursive=True):
             name = os.path.splitext(os.path.basename(path))[0]
             if ((source != 'kind' and name == 'base') or
                     name == '__init__' or path in loaded_paths):