grunt-initと同時に、npm install & bower installもやっちゃう ref: http://qiita.com/fnobi/items/68074616035f20cd23e4

file0.txt

var shellLines = require('./lib/shellLines');

exports.template = function (grunt, init, done) {
    init.process( {}, [
        init.prompt('name'),
        init.prompt('description')
    ], function(err, props) {
        // write package.json
        init.writePackageJSON('package.json', pkg);

        // write bower.json
        init.writePackageJSON('bower.json', bower);

        // npm install & bower install
        shellLines([{
            command: 'npm install',
            message: 'Installing npm dependencies'
        },{
            command: 'bower install',
            message: 'Installing bower dependencies'
        }], done);
    });
};