A commandline widget to run neofetch on watch mode

hpg.js

#!/bin/env node

const child = require("child_process");
const readline = require("readline");
const { promisify } = require("util");

const getLines = () =>
	String(
		child.execSync("neofetch --config ~/.mkr/config/neofetch.conf --off"),
	)
		.split("\n")
		.slice(0, -3);

const [cursorTo, clearLine] = ["cursorTo", "clearLine"].map(f => (...args) =>
	promisify(readline[f])(process.stdout, ...args),
);

const cache = [];
const writeY = async (chunk, y) => {
	if (cache[y] === chunk) return;
	cache[y] = chunk;
	await cursorTo(0, y);
	await clearLine(0);
	process.stdout.write(chunk + "\n");
};

console.clear();
console.log(getLines().join("\n"));

setInterval(async () => {
	const lines = getLines();
	let i = 0;
	for (const line of lines) {
		if (line) await writeY(line, i);
		i += 1;
	}
}, process.env.INTERVAL || 1000);

process.on("SIGINT", async () => {
	// cleanup our mess
	console.clear();
	process.exit();
});

process.stdout.on("resize", () => {
	const lines = getLines();
	console.clear();
	console.log(lines.join("\n"));
});