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import { Cache, extname, green } from "./deps.ts";
export interface CrossOptions {  name: string;  urls: { [os in typeof Deno.build.os]?: string };  policy?: CachePolicy;  cache?: string;  log?: boolean;}
export interface SingleOptions {  name: string;  url: string;  policy?: CachePolicy;  cache?: string;  log?: boolean;}
export type Options = CrossOptions | SingleOptions;
export enum CachePolicy {  NONE,  STORE,}
interface UnstableCore {  opSync: <T>(opName: string, arg1?: unknown, arg2?: unknown) => T;  opAsync: <T>(opName: string, arg1?: unknown, arg2?: unknown) => Promise<T>;}
export class PlugError extends Error {  constructor(message: string) {    super(message);
    this.name = "PlugError";    this.stack = undefined;  }}
export class PlugImportError extends Error {  constructor(message: string) {    super(message);
    this.name = "PlugImportError";    this.stack = undefined;  }}
export async function prepare(options: Options): Promise<number> {  const directory = options.cache ?? Cache.options.directory;  const policy = options.policy === CachePolicy.NONE    ? Cache.RELOAD_POLICY    : undefined;  Cache.configure({ directory });
  let url;  if ("urls" in options) {    url = options.urls[os];    if (!url) {      throw new PlugImportError(`URL for "${os}" platform was not provided.`);    }  } else {    url = options.url;  }
  const pref = prefixes[os];  const ext = extensions[os];
  url = Object.values(extensions).includes(extname(url))    ? url    : `${url}${(url.endsWith("/") ? "" : "/")}${pref}${options.name}${ext}`;
  const plug = Cache.namespace("plug");  if ((options.log ?? true) && !(await plug.exists(url))) {    console.log(`${green("Download")} ${url}`);  }  const file = await plug.cache(url, policy);
  // deno-lint-ignore ban-ts-comment  // @ts-ignore  return Deno.openPlugin(file.path);}
// deno-lint-ignore ban-ts-comment// @ts-ignoreexport const core = Deno.core as UnstableCore;export const os = Deno.build.os;export const extensions: { [os in typeof Deno.build.os]: string } = {  darwin: ".dylib",  linux: ".so",  windows: ".dll",};export const prefixes: { [os in typeof Deno.build.os]: string } = {  darwin: "lib",  linux: "lib",  windows: "",};