Added automatic inline migration for databases created with older Zope...

Added automatic inline migration for databases created with older Zope versions. The `Versions` screen from the `Control_Panel` is now automatically removed on Zope startup.

doc/CHANGES.rst

@@ -23,6 +23,10 @@ Known issues
 Restructuring
 +++++++++++++
 
+- Added automatic inline migration for databases created with older Zope
+  versions. The `Versions` screen from the `Control_Panel` is now
+  automatically removed on Zope startup.
+
 - Removed more unused code of the versions support feature including the
   Globals.VersionNameName constant.
 

src/App/ApplicationManager.py

@@ -139,18 +139,6 @@ class DatabaseChooser(SimpleItem):
 InitializeClass(DatabaseChooser)
 
 
-class VersionManager(Item, Implicit):
-    """Version management"""
-
-    id        ='Versions'
-    name=title='Version Management'
-    meta_type ='Version Management'
-
-InitializeClass(VersionManager)
-
-
-
-
 # refcount snapshot info
 _v_rcs=None
 _v_rst=None

src/HelpSys/HelpTopic.py

@@ -140,6 +140,7 @@ class HelpTopic(Implicit, HelpTopicBase, Item, PropertyManager, Persistent):
         self._v_last_read = mtime
 
     def _check_for_update(self):
+        import Globals
         if Globals.DevelopmentMode:
             try:    mtime=os.stat(self.file)[8]
             except: mtime=0

src/OFS/Application.py

@@ -289,6 +289,17 @@ class AppInitializer:
             cpl._init()
             app._setObject('Control_Panel', cpl)
             self.commit('Added Control_Panel')
+        else:
+            # Inline migration of old databases
+            cp = app.Control_Panel
+            ids = [i['id'] for i in cp._objects]
+            if 'Versions' in ids:
+                new = []
+                for entry in cp._objects:
+                    if entry['id'] != 'Versions':
+                        new.append(entry)
+                cp._objects = tuple(new)
+                self.commit('Removed Control_Panel.Versions')
 
         # b/c: Ensure that a ProductFolder exists.
         if not hasattr(aq_base(app.Control_Panel), 'Products'):