code: function template(pattern) {
      return app.src(pattern, { cwd: path.join(__dirname, 'templates') })
        .pipe(app.renderFile('*')).on('error', console.error)
        .pipe(app.conflicts(app.cwd))
        .pipe(app.dest(app.options.dest || app.cwd));
    }
docs: Generate a file from the template that matches the given `pattern`