Create menus and menu items.
drush generate-menus
number_menus : Number of menus to generate. Defaults to 2.
number_links : Number of links to generate. Defaults to 50.
max_depth : Max link depth. Defaults to 3
max_width : Max width of first level of links. Defaults to 8.
--kill : Delete all previously generated menus and links before generating new menus and links.
--pipe : Returns the list of generated menus, one per line.