Script to download an Egghead.io course

index.js

import puppeteer from "puppeteer";
import fs from "fs";
import { execSync } from "child_process";

const folder = process.argv[2]; // This array contains command line args passed to node
// First entry is node path, second is script path, thrid onwards are the args passed.
const URL = `https://egghead.io/courses/${folder}`;

async function main() {
  const browser = await puppeteer.launch({
    headless: true,
  });
  const webpage = await browser.newPage();
  await webpage.goto(URL, {
    waitUntil: "networkidle0",
  });
  // Select anchor tags with classes text-lg and font-semibold.
  // Then get the property href for each, convert it to json and await all returned promises.
  const list = await webpage.$$("a.text-lg.font-semibold");
  const hrefs = await Promise.all(
    list.map((handle) =>
      handle.getProperty("href").then((href) => href.jsonValue())
    )
  );
  await browser.close();
  console.log(hrefs);
  // Write hrefs to file
  fs.writeFileSync(
    "url-list.txt",
    hrefs.reduce((prev, current) => {
      return prev + current + "\n";
    }, "")
  );
  // Run yt-dlp on batch file
  execSync(
    `yt-dlp --batch-file 'url-list.txt' --concurrent-fragments 6 --paths 'C:\\Users\\Manan\\Videos\\${folder}' --output '[%(autonumber)d] %(title)s.%(ext)s'`,
    { shell: "powershell.exe" },
    (error, stdout, stderr) => {
      console.log(error);
      console.log(stdout);
      console.log(stderr);
    }
  );
}

await main();
process.exit(0);