// BuildIndex causes the storage layer to create an index for the given
// reference over the snapshot identified by the transaction.
func (s *Storage) BuildIndex(ctx context.Context, txn Transaction, ref ast.Ref) error {
path, err := NewPathForRef(ref.GroundPrefix())
if err != nil {
return indexingNotSupportedError()
}
// TODO(tsandall): for now we prevent indexing against stores other than the
// built-in. This will be revisited in the future. To determine the
// reference touches an external store, we collect the ground portion of
// the reference and see if it matches any mounts.
for _, mount := range s.mounts {
if path.HasPrefix(mount.path) || mount.path.HasPrefix(path) {
return indexingNotSupportedError()
}
}
return s.indices.Build(ctx, s.builtin, txn, ref)
}
