index.js

const { spawn } = require("child_process");
const path = require("path");
const fs = require("fs");
var isRunning = false;

function start(file) {
  if (isRunning) return;
  isRunning = true;
  let pathFile = [path.join(__dirname, file), ...process.argv.slice(2)];
  let run = spawn(process.argv[0], pathFile, {
    stdio: ["inherit", "inherit", "inherit", "ipc"],
  });
  run.on("message", (data) => {
    switch (data) {
      case "reset":
        run.kill();
        isRunning = false;
        start.apply(this, arguments);
        break;
      case "uptime":
        run.send(process.uptime());
        break;
      case "close":
        run.kill();
        process.kill();
        break;
    }
  });
  run.on("exit", (code) => {
    isRunning = false;
    if (code == 1) return process.kill();
    console.error("Exited with code:", code);
    fs.watchFile(pathFile[0], () => {
      fs.unwatchFile(pathFile[0]);
      start(file);
    });
  });
}
start("main.js");