Re: [GSoC PATCH v4 2/7] list-objects-filter: add list_objects_filter__filter_oidset()

> diff --git a/list-objects-filter.c b/list-objects-filter.c
> index c912ff3079..6a2e9d5b24 100644
> --- a/list-objects-filter.c
> +++ b/list-objects-filter.c
> @@ -828,3 +828,48 @@ void list_objects_filter__free(struct filter *filter)
>         filter->free_fn(filter->filter_data);
>         free(filter);
>  }
> +
> +/*
> + * NEEDSWORK: this reimplements the blob:limit size check rather than
> + * reusing the existing filter machinery in
> + * list_objects_filter__filter_object(). That machinery is currently
> + * tied to the object-walk path and cannot easily be driven from a
> + * plain oidset. It would be nice to refactor the filter code so this
> + * helper can reuse it instead of duplicating the size check.
> + */
> +int list_objects_filter__filter_oidset(struct repository *r,
> +       struct list_objects_filter_options *opts,

> +       const struct oidset *in,
> +       struct oidset *omitted)
> +{
> +       struct oidset_iter iter;
> +       const struct object_id *oid;
> +
> +       if (opts->choice != LOFC_BLOB_LIMIT)
> +               return error(_("filter_oidset: only blob:limit filters are supported"));
> +
> +       oidset_iter_init(in, &iter);
> +       while ((oid = oidset_iter_next(&iter))) {
> +               struct object_info info = OBJECT_INFO_INIT;
> +               enum object_type type;
> +               unsigned long size;
> +
> +               info.typep = &type;
> +               info.sizep = &size;
> +
> +               /*
> +                * Use OBJECT_INFO_SKIP_FETCH_OBJECT to avoid triggering
> +                * a lazy fetch while inspecting candidates for removal.
> +                */
> +               if (odb_read_object_info_extended(r->objects, oid, &info,
> +                               OBJECT_INFO_SKIP_FETCH_OBJECT) < 0)
> +                       continue;
> +
> +               if (type != OBJ_BLOB)
> +                       continue;
> +
> +               if (size >= opts->blob_limit_value)
> +                       oidset_insert(omitted, oid);
> +       }
> +       return 0;
> +}