Search based on the resource type name

Adds the filtering support to resource type based on
the type name pattern.

implements blueprint heat-resource-type-search

Change-Id: Id492d260b87464af385d58db7c017ba648fde411

heat/engine/environment.py

@@ -16,6 +16,7 @@ import fnmatch
 import glob
 import itertools
 import os.path
+import re
 import warnings
 
 from oslo_config import cfg
@@ -438,7 +439,10 @@ class ResourceRegistry(object):
 
         return _as_dict(self._registry)
 
-    def get_types(self, cnxt=None, support_status=None):
+    def get_types(self,
+                  cnxt=None,
+                  support_status=None,
+                  type_name=None):
         '''Return a list of valid resource types.'''
 
         # validate the support status
@@ -478,8 +482,15 @@ class ResourceRegistry(object):
 
         enforcer = policy.ResourceEnforcer()
 
+        def name_matches(name):
+            try:
+                return type_name is None or re.match(type_name, name)
+            except:  # noqa
+                return False
+
         return [name for name, cls in six.iteritems(self._registry)
                 if (is_resource(name) and
+                    name_matches(name) and
                     status_matches(cls) and
                     is_available(cls) and
                     is_allowed(enforcer, name) and

heat/tests/test_environment.py

@@ -762,6 +762,23 @@ class ResourceRegistryTest(common.HeatTestCase):
         self.assertIn('ResourceTypeUnSupportedLiberty', types)
         self.assertIn('GenericResourceType', types)
 
+    def test_list_type_with_name(self):
+        registry = resources.global_env().registry
+        types = registry.get_types(type_name='ResourceType*')
+        self.assertIn('ResourceTypeUnSupportedLiberty', types)
+        self.assertNotIn('GenericResourceType', types)
+
+    def test_list_type_with_name_none(self):
+        registry = resources.global_env().registry
+        types = registry.get_types(type_name=None)
+        self.assertIn('ResourceTypeUnSupportedLiberty', types)
+        self.assertIn('GenericResourceType', types)
+
+    def test_list_type_with_invalid_type_name(self):
+        registry = resources.global_env().registry
+        types = registry.get_types(type_name="r'[^\+]'")
+        self.assertEqual([], types)
+
 
 class HookMatchTest(common.HeatTestCase):