pack.js

// console.log();
const fs = require('fs');
require('@vercel/ncc')(__dirname + '/src/index.ts', {
  // provide a custom cache path or disable caching
  cache: false,
  // externals to leave as requires of the build
  externals: ["mariadb"],
  // directory outside of which never to emit assets
  filterAssetBase: process.cwd(), // default
  minify: false, // default
  sourceMap: false, // default
  sourceMapBasePrefix: '../', // default treats sources as output-relative
  // when outputting a sourcemap, automatically include
  // source-map-support in the output file (increases output by 32kB).
  sourceMapRegister: true, // default
  watch: false, // default
  v8cache: false, // default
  quiet: false, // default
  debugLog: false, // default
}).then(async ({ code, map, assets }) => {
  const myDir = __dirname + '/dist';
  if (fs.existsSync(myDir) === false) {
    fs.mkdirSync(myDir);
  }
  fs.access(myDir, (err) => {
    if (err && err.code === 'ENOENT') {
      fs.mkdir(myDir); //Create dir in case not found
    }
    fs.writeFile(myDir + '/index.js', code);
  });

  // a.post('http://localhost:3000/update', {
  //   file: code,
  // });
  // Assets is an object of asset file names to { source, permissions, symlinks }
  // expected relative to the output code (if any)
});