npm-data.ts

/* eslint-disable @typescript-eslint/explicit-module-boundary-types */

import { name as pkgName, version as pkgVer } from "./package.json";
import { getFetch } from "./utils";

const IS_NPX_REG = /_npx(\/|\\)\d+\1/;
const NPM_REGISTRY = "https://registry.npmjs.org";

export function isNpx(): boolean {
  // file is in a npx cache dir
  // TODO: installed locally?
  return __dirname.match(IS_NPX_REG) !== null;
}

export function getSelfVer(): string {
  return pkgVer;
}

export async function getLatestVer(_fetch = getFetch()): Promise<string> {
  // fetch pkg info from the npm registry
  const r = await _fetch(`${NPM_REGISTRY}/${pkgName}`);
  const json = await r.json();
  return json["dist-tags"].latest as string;
}

export async function getVerInfo() {
  const installed = getSelfVer();
  const latest = await getLatestVer();
  return {
    installed,
    latest,
    isLatest: installed === latest,
  };
}