respawns app if it dies

nodie.js

// mit licenced

var sys = require('util')
  , child_process = require('child_process')
  , proc

process.title = 'nodie'

;(function respawn(app) {
  console.log('Starting', app)
  
  try {
    proc = child_process.spawn(app)
  } catch(e) {
    return setTimeout(function() {
      respawn(app)
    }, 5000)
  }

  proc.stdout.on('data', function (data) {
    process.stdout.write(data)
  })

  proc.stderr.on('data', function (data) {
    sys.print(data)
  })

  proc.on('exit', function (err, sig) {
    if (err) {
      console.log('Process exited with error:', err, sig)
      console.log('Restarting in 5 seconds')
      setTimeout(function() {
        respawn(app)
      }, 5000)
    } else {
      console.log('Process exited gracefully')
      console.log('Restarting in 5 seconds')
      setTimeout(function() {
        respawn(app)
      }, 5000)      
    }
  })

}(process.argv[2]))