Log errors and proceed when reindexing

.gitignore

@@ -17,3 +17,7 @@ Makefile
 .pydevproject
 .project
 .settings
+
+# virtual environment:
+lib64
+pip-selfcheck.json

sc/social/like/upgrades/v3046/__init__.py

@@ -5,6 +5,15 @@
 
 import transaction
 
+try:
+    # this exception must be resubmitted:
+    from ZODB.POSException import ConflictError
+except:
+    # we don't really *require* this;
+    #  if we don't have it, a dummy exception will do:
+    class ConflictError(Exception):
+        pass
+
 
 def reindex_catalog(setup_tool):
     """Reindex objects to fix interfaces on the catalog."""
@@ -16,13 +25,24 @@ def reindex_catalog(setup_tool):
     results = catalog()
     logger.info(u'Found {0} objects'.format(len(results)))
     n = 0
+    errors = 0
     for obj in get_valid_objects(results):
-        catalog.catalog_object(obj, idxs=['object_provides'], update_metadata=False)
+        try:
+            catalog.catalog_object(obj, idxs=['object_provides'], update_metadata=False)
+        except ConflictError as e:
+            raise
+        except Exception as e:
+            errors += 1
+            logger.error('%(e)r reindexing %(obj)r', locals())
+            if test:
+                raise
         n += 1
         if n % 1000 == 0 and not test:
             transaction.commit()
             logger.info('{0} items processed.'.format(n))
 
     if not test:
+        if errors:
+            logger.info('%(errors)d errors occured.', locals())
         transaction.commit()
     logger.info('Done.')