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type Action = () => void | Promise<void>;
const actions: Action[] = [];const ss: Deno.SignalStream[] = [];
async function setupHook() {  if (Deno.build.os !== "windows") {    ss.push(      ...[        Deno.signals.quit(),        Deno.signals.interrupt(),        Deno.signals.terminate(),      ]    );    for (const s of ss) {      (async () => {        for await (const _ of s) {          for (const op of actions) {            await op();          }          Deno.exit(-128);        }      })();    }  }}
export function onExit(action: Action): void {  actions.push(action);  if (actions.length === 1) {    setupHook();  }}
export function exit(code?: number): never {  for (const s of ss) s.dispose();  return Deno.exit(code);}