build.js

const { exec } = require('child_process');
const themeColors = {
  text: '#ff8e4d',
  variable: '#ff624d',
  error: '#f5426c',
};

const main = () => {
  console.log(chalk.hex(themeColors.text)('Starting build...'));
  exec('tsc', (err, stdout, stderr) => {
    if (err) {
      console.log(
        chalk.hex(themeColors.error)('Build failed with the following error: ')
      );
      console.log(chalk.hex(themeColors.error)(stdout));
      return;
    }
    console.log(
      chalk.hex(themeColors.text)(
        `Build successful! You can start the bot by running ${chalk.hex(themeColors.variable)('npm start')}\n`
      )
    );
  });
};

try {
  var chalk = require('chalk');
  main();
} catch (e) {
  if (e.code === 'MODULE_NOT_FOUND') {
    console.log(
      '\x1b[31mNode modules are not installed. \x1b[33mInstalling...\x1b[37m'
    );
    exec('npm i', (err, stdout, stderr) => {
      if (err) {
        console.log('\x1b[31mFailed to install node modules. \x1b[37m');
        console.log(err);
        process.exit(1);
      }
      console.log(stdout);
      console.log(
        '\x1b[32mNode modules successfully installed. \x1b[33mRestarting in 3 seconds... \x1b[37m'
      );
      setTimeout(() => {
        exec('node build.js', (err, stdout, stderr) => {
          if (err) {
            console.log('\x1b[31mFailed to restart. \x1b[37m');
            console.log(err);
            process.exit(1);
          }
          console.log(stdout);
        });
      }, 3000);
    });
  }
}