# File lib/rugged_adapter/git_layer_rugged.rb, line 234
      def ls_files(query, options = {})
        ref = options[:ref] || "refs/heads/master"
        tree = @repo.lookup(sha_from_ref(ref)).tree
        tree = @repo.lookup(tree[options[:path]][:oid]) if options[:path]
        results = []
        tree.walk_blobs do |root, blob|
          next unless blob[:name] =~ /#{query}/
          path = options[:path] ? ::File.join(options[:path], root, blob[:name]) : "#{root}#{blob[:name]}"
          results << path
        end
        results
      end