code: function findPluginPath(command) {
    if (command && /^\w+$/.test(command)) {
      try {
        return resolve.sync('nowa-' + command, {
          paths: moduleDirs
        });
      } catch (e) {
        console.log('');
        console.log('  ' + chalk.green.bold(command) + ' command is not installed.');
        console.log('  You can try to install it by ' + chalk.blue.bold('nowa install ' + command) + '.');
        console.log('');
      }
    }
  }
docs: locate the plugin by command