{ lib }:
let
  entryType = lib.types.submodule {
    options = {
      command = lib.mkOption {
        type = lib.types.str;
        example = "nvim";
        description = "Command expanded by this shell shortcut.";
      };

      abbreviation = lib.mkOption {
        type = lib.types.bool;
        default = true;
        description = "Whether fish realizes this shell shortcut as an abbreviation instead of an alias.";
      };
    };
  };
in
{
  type = lib.types.coercedTo lib.types.str (command: { inherit command; }) entryType;
}