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import util from "./util.ts";
export const builtinModuleExts = ["tsx", "ts", "mts", "jsx", "js", "mjs"];
export class FetchError extends Error {  constructor(    public status: number,    public details: Record<string, unknown>,    message: string,    opts?: ErrorOptions,  ) {    super(message, opts);  }
  static async fromResponse(res: Response): Promise<FetchError> {    let message = res.statusText;    let details: Record<string, unknown> = {};    if (res.headers.get("content-type")?.startsWith("application/json")) {      details = await res.json();      if (typeof details.message === "string") {        message = details.message;      }    } else {      message = await res.text();    }    return new FetchError(res.status, details, message);  }}
/** * fix remote url to local path. * e.g. `https://esm.sh/react@17.0.2?dev` -> `/-/esm.sh/react@17.0.2?dev` */export function toLocalPath(url: string): string {  if (util.isLikelyHttpURL(url)) {    let { hostname, pathname, port, protocol, search } = new URL(url);    const isHttp = protocol === "http:";    if ((isHttp && port === "80") || (protocol === "https:" && port === "443")) {      port = "";    }    return [      "/-/",      isHttp && "http_",      hostname,      port && "_" + port,      util.trimSuffix(pathname, "/"),      search,    ].filter(Boolean).join("");  }  return url;}
/** * restore the remote url from local path. * e.g. `/-/esm.sh/react@17.0.2` -> `https://esm.sh/react@17.0.2` */export function restoreUrl(pathname: string): string {  let [h, ...rest] = pathname.substring(3).split("/");  let protocol = "https";  if (h.startsWith("http_")) {    h = h.substring(5);    protocol = "http";  }  const [host, port] = h.split("_");  return `${protocol}://${host}${port ? ":" + port : ""}/${rest.join("/")}`;}
export function globalIt<T>(name: string, fn: () => T): T {  const cache: T | undefined = Reflect.get(globalThis, name);  if (cache !== undefined) {    return cache;  }  const ret = fn();  if (ret !== undefined) {    Reflect.set(globalThis, name, ret);  }  return ret;}