Use the commit id for the snapshot name

sugar/objects/objecttype.py

@@ -0,0 +1,43 @@
+_SERVICE = "org.laptop.ObjectTypeRegistry"
+_PATH = "/org/laptop/ObjectTypeRegistry"
+_IFACE = "org.laptop.ObjectTypeRegistry"
+
+def _object_type_from_dict(info_dict):
+    if info_dict:
+        return ObjectType(info_dict['type_id'],
+                          info_dict['name'],
+                          info_dict['icon'])
+    else:
+        return None
+
+class ObjectType(object):
+    def __init__(self, type_id, name, icon, mime_types):
+        self.type_id = type_id
+        self.name = name
+        self.icon = icon
+        self.mime_types = []
+
+    def to_dict(self):
+        return { 'type_id' : self.type_id,
+                 'name'    : self.name,
+                 'icon'    : self.icon
+                }
+
+class ObjectTypeRegistry(object):
+    def __init__(self):
+        bus = dbus.SessionBus()
+        bus_object = bus.get_object(_SERVICE, _PATH)
+        self._registry = dbus.Interface(bus_object, _IFACE)
+
+    def get_type(type_id):
+        type_dict = self._registry.GetType(type_id)
+        return _object_type_from_dict(type_dict)
+
+    def get_type_for_mime(mime_type):
+        type_dict = self._registry.GetTypeForMime(type_id)
+        return _object_type_from_dict(type_dict)
+
+_registry = ObjectRegistry()
+
+def get_registry():
+    return _registry