traverse.nix

# this is a home-manager module
{lib, options, ...}: let
  settings-binds-type = let
    traverse = v:
      if (v ? _type && v._type == "option")
      then
        {
          ${lib.concatStringsSep "." v.loc} = v;
        }
        // traverse (v.type.getSubOptions v.loc)
      else lib.concatMapAttrs (lib.const traverse) (lib.filterAttrs (name: lib.const (name != "_module")) v);
  in
    # based on global attr path if you run home manager as a nixos module
    # (traverse options.programs.niri.settings)."home-manager.users.sodiboo.programs.niri.settings.binds".type;
    # manually specify the base path
    # (traverse (options.programs.niri.settings.type.getSubOptions ["settings"]))."settings.binds".type;
    # shortest
    (traverse (options.programs.niri.settings.type.getSubOptions []))."binds".type;
in {
  # ... configuration making use of above type
};