do not write null sha1s to on-disk index

diff --git a/string-list.c b/string-list.c
index 9b023a25841cb7a9c1faecc30c484eba0e16d6af..d9810aba421cbbc844b45ea5ca713a480a699eb2 100644 (file)
--- a/string-list.c
+++ b/string-list.c
@@ -153,6 +153,7 @@ struct string_list_item *string_list_append(struct string_list *list, const char
        ALLOC_GROW(list->items, list->nr + 1, list->alloc);
        list->items[list->nr].string =
                list->strdup_strings ? xstrdup(string) : (char *)string;
+       list->items[list->nr].util = NULL;
        return list->items + list->nr++;
 }
 
@@ -184,3 +185,12 @@ int unsorted_string_list_has_string(struct string_list *list,
        return unsorted_string_list_lookup(list, string) != NULL;
 }
 
+void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util)
+{
+       if (list->strdup_strings)
+               free(list->items[i].string);
+       if (free_util)
+               free(list->items[i].util);
+       list->items[i] = list->items[list->nr-1];
+       list->nr--;
+}