Made Helpsys.HelpSys internal ZCatalog creation lazy, so it isn't created unless first accessed.

doc/CHANGES.txt

@@ -9,6 +9,9 @@ Zope Changes
 
     Restructuring
 
+      - Made Helpsys.HelpSys internal ZCatalog creation lazy, so it isn't
+        created unless first accessed.
+
       - Turned deprecation warnings for manage_afterAdd, manage_beforeDelete
         and manage_afterClone methods into discouraged warnings. These methods
         will not be removed in Zope 2.11, but stay for the foreseeable future.

lib/python/HelpSys/HelpSys.py

@@ -219,7 +219,12 @@ class ProductHelp(Acquisition.Implicit, ObjectManager, Item, Persistent):
     def __init__(self, id='Help', title=''):
         self.id=id
         self.title=title
-        c=self.catalog=ZCatalog('catalog')
+        self._catalog = None
+
+    @property
+    def catalog(self):
+        if self._catalog is None:
+            c=self._catalog=ZCatalog('catalog')
             # clear catalog
             for index in c.indexes():
                 c.delIndex(index)
@@ -233,6 +238,7 @@ class ProductHelp(Acquisition.Implicit, ObjectManager, Item, Persistent):
             c.addColumn('title_or_id')
             c.addColumn('url')
             c.addColumn('id')
+        return self._catalog
 
     security.declareProtected(add_documents_images_and_files, 'addTopicForm')
     addTopicForm=DTMLFile('dtml/addTopic', globals())