cloudfunctions/ClearingRedundantFolders/node_modules/archiver/lib/plugins/tar.js

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/**
 * TAR Format Plugin
 *
 * @module plugins/tar
 * @license [MIT]{@link https://github.com/archiverjs/node-archiver/blob/master/LICENSE}
 * @copyright (c) 2012-2014 Chris Talkington, contributors.
 */
var zlib = require('zlib');

var engine = require('tar-stream');
var util = require('archiver-utils');

/**
 * @constructor
 * @param {TarOptions} options
 */
var Tar = function(options) {
  if (!(this instanceof Tar)) {
    return new Tar(options);
  }

  options = this.options = util.defaults(options, {
    gzip: false
  });

  if (typeof options.gzipOptions !== 'object') {
    options.gzipOptions = {};
  }

  this.supports = {
    directory: true,
    symlink: true
  };

  this.engine = engine.pack(options);
  this.compressor = false;

  if (options.gzip) {
    this.compressor = zlib.createGzip(options.gzipOptions);
    this.compressor.on('error', this._onCompressorError.bind(this));
  }
};

/**
 * [_onCompressorError description]
 *
 * @private
 * @param  {Error} err
 * @return void
 */
Tar.prototype._onCompressorError = function(err) {
  this.engine.emit('error', err);
};

/**
 * [append description]
 *
 * @param  {(Buffer|Stream)} source
 * @param  {TarEntryData} data
 * @param  {Function} callback