csv-append/dist/index.umd.js

Append data to a big csv file.

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('fs'), require('csv-write-stream'), require('pump')) :
  typeof define === 'function' && define.amd ? define(['exports', 'fs', 'csv-write-stream', 'pump'], factory) :
  (factory((global.TEMP_UMD_MODULE_NAME_CHANGE_ME = {}),global.fs,global.csvWriter,global.pump));
}(this, (function (exports,fs,csvWriter,pump) { 'use strict';

  fs = fs && fs.hasOwnProperty('default') ? fs['default'] : fs;
  csvWriter = csvWriter && csvWriter.hasOwnProperty('default') ? csvWriter['default'] : csvWriter;
  pump = pump && pump.hasOwnProperty('default') ? pump['default'] : pump;

  const csvAppend = (path, appendToExisting = false) => {
      const writeStream = fs.createWriteStream(path, {
          flags: appendToExisting ? "a" : "w"
      });
      const writer = csvWriter({ sendHeaders: !appendToExisting });
      writer.pipe(writeStream);
      const append = (args) => {
          if (Array.isArray(args)) {
              for (let arg of args) {
                  writer.write(arg);
              }
          }
          else {
              writer.write(args);
          }
          return writer;
      };
      const end = () => {
          return new Promise(resolve => {
              pump(writer, writeStream, err => {
                  resolve();
              });
              writer.end();
          });
      };
      return {
          append,
          end
      };
  };

  exports.csvAppend = csvAppend;
  exports.default = csvAppend;

  Object.defineProperty(exports, '__esModule', { value: true });

})));