Gzip a file using the zlib module

zlib-gz-demo.ts

import zlib from "zlib";
import fs from "fs";
import stream from "stream";
import { promisify } from "util";
import readline from "readline";

const pipe = promisify(stream.pipeline);
const { stdin, stdout, stderr } = process;

(async function () {
	const rl = readline.createInterface({ input: stdin, output: stdout });
	const filename = await new Promise<string>((resolve, reject) =>
		rl.question("What file would you like to compress? ", (file) => resolve(file)));
	const input = fs.createReadStream(filename);
	const output = fs.createWriteStream(`${filename}.gz`);
	const gzip = zlib.createGzip();
	await pipe(input, gzip, output);
})();