import { deferred, Deferred,} from "./vendor/https/deno.land/std/util/async.ts";
export function pathResolver(meta: ImportMeta): (p: string) => string { return (p) => new URL(p, meta.url).pathname;}
export interface PromiseWaitQueue<T, P> { enqueue(t: T): Promise<P>;}
export function promiseWaitQueue<T, P>( creator: (t: T) => Promise<P>,): PromiseWaitQueue<T, P> { const queue: { d: Deferred<P>; t: T; }[] = []; function enqueue(t: T): Promise<P> { const d = deferred<P>(); queue.push({ d, t }); if (queue.length === 1) { dequeue(); } return d; } function dequeue() { const [e] = queue; if (!e) return; creator(e.t) .then(e.d.resolve) .catch(e.d.reject) .finally(() => { queue.shift(); dequeue(); }); } return { enqueue };}