Create a custom generator using javascript

    module.exports = function (env, callback) {

      function Page() {
        var rtn = new env.plugins.Page();

        rtn.getFilename = function() {
          return 'index.html';
        },

        rtn.getView = function() {
          return function(env, locals, contents, templates, callback) {
            var error = null;
            var context = {};
            env.utils.extend(context, locals);
            var buffer = new Buffer(templates['index.jade'].fn(context));
            callback(error, buffer);
          };
        };
        return rtn;
      };

      /** Generates a custom index page */
      function gen(contents, callback) {
        var p = Page();
        var pages = {'index.page': p};
        var error = null;
        callback(error, pages);
      };

      env.registerGenerator('magic', gen);
      callback();
    };