# File lib/chef/knife/client_bulk_delete.rb, line 32
      def run
        if name_args.length < 1
          ui.fatal("You must supply a regular expression to match the results against")
          exit 42
        end
        all_clients = Chef::ApiClient.list(true)

        matcher = /#{name_args[0]}/
        clients_to_delete = {}
        all_clients.each do |name, client|
          next unless name =~ matcher
          clients_to_delete[client.name] = client
        end

        if clients_to_delete.empty?
          ui.info "No clients match the expression /#{name_args[0]}/"
          exit 0
        end

        ui.msg("The following clients will be deleted:")
        ui.msg("")
        ui.msg(ui.list(clients_to_delete.keys.sort, :columns_down))
        ui.msg("")
        ui.confirm("Are you sure you want to delete these clients")

        clients_to_delete.sort.each do |name, client|
          client.destroy
          ui.msg("Deleted client #{name}")
        end
      end