Re: [PATCH v3 5/5] list-objects-filter: implement filter tree:0

>
> There are a couple of options here:
> [] If really want to omit all trees and blobs (and we DO NOT want
>     the oidset of everything omitted), then we might be able to
>     shortcut the traversal and speed things up.
>
>     {} add a LOFR_SKIP_TREE bit to list_objects_filter_result
>     {} test this bit process_tree() and avoid the init_tree_desc() and
>        the while loop and some adjacent setup/tear-down code.
>     {} make this filter something like:
>
>         case LOFS_BEGIN_TREE:
>                 if (filter_data->omits) {
>                         oidset_insert(filter_data->omits, &obj->oid);
>                         return LOFR_MARK_SEEN; /* ... (hard omit) */
>                 } else
>                         return LOFR_SKIP_TREE;
>         case LOFS_BLOB:
>                 if (filter_data->omits) {
>                         oidset_insert(filter_data->omits, &obj->oid);
>                         return LOFR_MARK_SEEN; /* ... (hard omit) */
>                 else
>                         assert(...should not happen...);
>
> [] Later, if we choose to actually support a depth>0, we'll probably
>     want a different filter function to conditionally include/exclude
>     blobs, include shallow tree[node]s, and do some of the provisional-
>     omit logic on deep tree[nodes] (in case a tree appears at multiple
>     places/depths in the history).  But that can wait.
>
> Jeff
>