A grunt task to publish npm packages from CI environments like travis

Gruntfile.js

  grunt.registerMultiTask('publish', 'Publish the latest version of this plugin', function() {
		var done = this.async(),
			me = this,
			npm = require('npm');
		npm.load({}, function(err) {
			npm.registry.adduser(me.data.username, me.data.password, me.data.email, function(err) {
				if (err) {
					console.log(err);
					done(false);
				} else {
					npm.config.set("email", me.data.email, "user");
					npm.commands.publish([], function(err) {
						console.log(err || "Published to registry");
						done(!err);
					});
				}
			});
		});
	});