@platform-os/marketplace-kit/lib/prepareArchive.js

const fs = require('fs'),
  shell = require('shelljs'),
  logger = require('./logger'),
  archiver = require('archiver');

const prepareDestination = (path) => {
  shell.mkdir('-p', 'tmp');
  shell.rm('-rf', path);
};
const prepareArchive = (path, verbose = true) => {
  prepareDestination(path);
  const output = fs.createWriteStream(path);
  const archive = archiver('zip', { zlib: { level: 6 } });

  // listen for all archive data to be written
  // 'close' event is fired only when a file descriptor is involved
  output.on('close', () => {
    if(verbose) {
      const sizeInMB = archive.pointer() / 1024 / 1024;
      logger.Info(`Archive size: ${sizeInMB.toFixed(2)} MB`);
    }
  });
  archive.on('warning', err => {
    if (err.code === 'ENOENT') {
      logger.Error(err);
    } else throw err;
  });
  archive.on('error', err => {
    throw err;
  });
  archive.pipe(output);
  return archive;
};

module.exports = prepareArchive;