Clearing mqtt retained messages using mqttjs

.gitignore

node_modules

index.js

/**
 * Module dependencies 
 */
var mqtt = require('mqtt');

/**
 * Check command line arguments
 */
if (process.argv.length != 2) {
  console.error('No topic specified');
  process.exit(-1);
}

/**
 * Topic to clear
 */
var topic = process.argv[1];

/**
 * Do it!
 */
var c = mqtt.createClient();
c.on('connect', function() {
  c.publish(topic, null, {retain: true});
  c.end();
});

package.json

{
  "name": "mqtt-topic-clear",
  "version": "0.0.1",
  "description": "Clear an mqtt topic of retained messages",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "https://gist.github.com/5555238.git"
  },
  "keywords": [
    "mqtt"
  ],
  "author": "Adam Rudd",
  "license": "BSD",
  "dependencies": {
    "mqtt": "~0.2.7"
  }
}