ninjs-lodash/lib/libs/cleanup.js

lodash wrapper + utils

'use strict'

const _ = require('lodash')

module.exports = cleanup
_.mixin({ cleanup: cleanup })

// attach user callback to the process event emitter
  // if no callback, it will still exit gracefully on Ctrl-C
function cleanup(callback) {
  callback = callback || function() {}
  process.on('cleanup', callback);
  // do app specific cleaning before exiting
  process.on('exit', () => { process.emit('cleanup') })
  // catch ctrl+c event and exit normally
  process.on('SIGINT', () => { console.log('Ctrl-C...'); process.exit(2) })
  //catch uncaught exceptions, trace, then exit normally
  process.on('uncaughtException', (e) => { console.log('Uncaught Exception...'); console.log(e.stack); process.exit(99) })
}

// USE BELOW ONLY FOR TESTING!

// Emits an uncaught exception when called because module does not exist
// exports.error = function() {
//   console.log('error')
//   var x = require('')
// }

// Prevents the program from closing instantly
// exports.resume = function() { process.stdin.resume() }