Generate hosts file with IPv4 and IPv6 support, mac

Generate hosts file.js

const fs = require("fs");
const a = require("child_process");

const excluded = [
  // Breaks google drive
  "clients6.google.com",
];

(async () => {
  const hostname = a.execSync("hostname").toString().trim();
  let header = `# Hosts file, → Autogenerated at ${new Date().toString()}
# Generated by ${__filename} (${hostname.split(".")[0]})

# BEGIN HEADER
127.0.0.1       localhost ${hostname}
255.255.255.255 broadcasthost
::1             localhost ${hostname}
::1             ip6-localhost ip6-loopback
fe00::0         ip6-localnet
ff00::0         ip6-mcastprefix
ff02::1         ip6-allnodes
ff02::2         ip6-allrouters
ff02::3         ip6-allhosts
# END HEADER`;
  // let blacklist = await fetch("https://scripttiger.github.io/alts/4_6/blacklist-fg.txt").then(r => r.text())
  let youtube = await fetch(
    "https://raw.githubusercontent.com/ewpratten/youtube_ad_blocklist/master/blocklist.txt"
  ).then((r) => r.text());
  let youtube2 = await fetch(
    "https://raw.githubusercontent.com/FadeMind/hosts.extras/master/GoodbyeAds-YouTube-Adblock-Extension/hosts"
  )
    .then((r) => r.text())
    .then((text) => {
      return text
        .split("N S")[1]
        .split("#")[1]
        .split("\n")
        .slice(1)
        .map((i) => i.replace("0.0.0.0 ", ""));
    });
  let spotify = await fetch(
    "https://raw.githubusercontent.com/FadeMind/hosts.extras/master/GoodbyeAds-Spotify-AdBlock-Extension/hosts"
  )
    .then((r) => r.text())
    .then((text) => {
      return text
        .split("N S")[1]
        .split("#")[1]
        .split("\n")
        .slice(1)
        .map((i) => i.replace("0.0.0.0 ", ""));
    });
  let morehosts = [
    await fetch(
      "https://raw.githubusercontent.com/liamengland1/mischosts/master/whiteops-hosts"
    ).then((r) => r.text()),
    await fetch(
      "https://raw.githubusercontent.com/liamengland1/mischosts/master/apple-telemetry"
    ).then((r) => r.text()),
  ]
    .map((i) => {
      return i
        .split("\n")
        .filter((j) => !j.startsWith("#"))
        .map((i) => i.replace("0.0.0.0 ", "").trim());
    })
    .flat();

  youtube = [...youtube.split("\n"), ...youtube2, ...spotify, ...morehosts]
    .filter((i) => i.trim().length)
    .filter((i) => !excluded.includes(i))
    .map((i) => {
      i = i.trim();
      return `0.0.0.0 ${i}\n:: ${i}`;
    })
    .join("\n");
  const other = `\n\n# YOUTUBE BLACKLIST\n\n${youtube}\n\n`;
  fs.writeFileSync("/etc/hosts", `${header}\n\n${other}`); // `# OTHER BLACKLIST\n\n${blacklist}`
})();