Generating a docpad site using Grunt. Not much to this, really... Just use the `grunt-exec` plugin using the config below and you should be good to go.

Gruntfile.js

/*global module */

module.exports = function(grunt) {
  'use strict';
	
	// Project configuration.
	grunt.initConfig({
		// Other config here.
		exec: {
			docpad: {
				cmd: 'docpad generate --env static'
			}
		}
	});

	grunt.loadNpmTasks('grunt-exec');

	grunt.registerTask('default', ["exec:docpad"]);
};

package.json

{
	...
	"devDependencies": {
		...
		"grunt-exec": "0.4.0",
		...
	}
}