class Chef::Knife::RoleRunListReplace

def replace_in_env_run_list(role, environment, old_entry, new_entry)
  nlist = []
  role.run_list_for(environment).each do |entry|
    if entry == old_entry
      nlist << new_entry
    else
      nlist << entry
    end
  end
  role.env_run_lists_add(environment => nlist)
end