nems/bin/start.js

nodejs-embedded-mongodb-standalone is a promise based embedded mongodb distribution library that downloads a appropriate mongodb and utilizes it as standalone, e.g. for integration/functional tests.

/** Download, extract & start a mongodb with given version and extraction directory or defaults **/

// toogle debug output for mongodb-download
process.env.DEBUG = '*';

var
  logger = require('npmlog'),
  sprintf = require('sprintf-js').sprintf,
  args = process.argv.splice(process.execArgv.length + 2),
  
  nems = require('../lib/nems'),

  MODULE_NAME = require('../package.json').name,
  MESSAGE_START = 'Starting distribution and execution of mongodb!',
  MESSAGE_USAGE = 'Usage:\n\nnode ./bin/start.js [version [dir [port [noprealloc [nojournal [dbpath]]]]]]\n\n' +
    'version - the version of the mongodb\n' +
    'dir - the directory to download and extract to\n' +
    'port - the mongodb port (optional)\n' +
    'noprealloc - `true´ to not pre-allocate (optional)\n' +
    'nojournal - `true´ to not use a journal (optional)\n\n' +
    'dbpath - db working directory, if different from installation path (optional)\n\n' +
    'DO NOT OMIT A PARAMETER IN SEQUENCE!\n' +
    'If no download directory is given, mongodb will be downloaded and extracted to the temporary folder of your OS.\n' +
    'If no version is given also, a default version will be downloaded and extracted.',
  MESSAGE_DEFAULTS = 'Using default configuration for download and extraction.',
  MESSAGE_STARTED = 'mongod started with pid %s .';


if (args.length > 6 || (args.length === 1 && ( args[0] === 'h' || args[0] === '-h' || args[0] === '--help'))) {
  logger.info(MODULE_NAME, MESSAGE_USAGE);
  return;
} else if (args.length === 0) {
  logger.info(MODULE_NAME, MESSAGE_DEFAULTS);
}

logger.info(MODULE_NAME, MESSAGE_START);

var
  VERSION = (args[0]) ? args[0] : '2.4.9',
  DOWNLOAD_DIR = args[1],
  PORT = args[2],
  NOPREALLOC = args[3],
  NOJOURNAL = args[4],
  DB_PATH = args[5];

nems.start(VERSION, DOWNLOAD_DIR, PORT, NOPREALLOC, NOJOURNAL, DB_PATH)
  .then(function(pid) {
    logger.info(MODULE_NAME, sprintf(MESSAGE_STARTED, pid));
  })
  .catch(function (err) {
    logger.error(MODULE_NAME, err.message);
  });