Specialed Exception class for unset attribute

mpcdf_common.py

@@ -33,6 +33,10 @@ def project_meta(api_url, project):
     return ElementTree.fromstringlist(osc.core.show_project_meta(api_url, project))
 
 
+class UnsetAttributeException(Exception):
+    pass
+
+
 def get_attribute(api_url, project, package, attribute, with_project=False):
     attribute_meta = osc.core.show_attribute_meta(api_url, project, package, None, attribute, False, with_project)
     if attribute_meta is None:
@@ -43,7 +47,7 @@ def get_attribute(api_url, project, package, attribute, with_project=False):
     if attribute is not None:
         return root
     else:
-        raise Exception("Attribute not set")
+        raise UnsetAttributeException("Attribute not set")
 
 
 def get_attribute_values(api_url, project, package, attribute, with_project=False):

mpcdf_sync_projects.py

@@ -76,7 +76,9 @@ def do_mpcdf_sync_projects(self, subcmd, opts, *args):
         for attribute in package_attributes:
             try:
                 attr = mpcdf_common.get_attribute(api_url, from_project, orig_package, attribute)
-            except Exception:
+            except mpcdf_common.UnsetAttributeException:
+                if mpcdf_common.has_attribute(api_url, to_project, orig_package, attribute):
+                    mpcdf_common.remove_attribute(api_url, to_project, orig_package, attribute)
                 continue
             mpcdf_common.set_attribute(api_url, to_project, orig_package, attr)