function (app, callback) {
    var cozyLight = require('./cozy-light');
    var config = configHelpers.getConfig();
    logger.info('Uninstalling ' + app + '...');
    if (config.apps[app] === undefined) {
      logger.error(app + ' is not installed.');
      nodeHelpers.invoke(callback, true);
    } else {
      var module = config.apps[app].name;
      npmHelpers.uninstall(module, function removeAppFromConfig (err) {
        if (err) {
          logger.raw(err);
          logger.error('npm did not uninstall ' + app + ' correctly.');
          nodeHelpers.invoke(callback, err);
        } else {
          logger.info(app + ' successfully uninstalled.');
          configHelpers.watcher.one(callback);
          configHelpers.removeApp(app);
        }
      });
    }
  }
function (app, callback) {
    var cozyLight = require('./cozy-light');
    var config = configHelpers.getConfig();
    logger.info('Uninstalling ' + app + '...');
    if (config.apps[app] === undefined) {
      logger.error(app + ' is not installed.');
      nodeHelpers.invoke(callback, true);
    } else {
      var module = config.apps[app].name;
      npmHelpers.uninstall(module, function removeAppFromConfig (err) {
        if (err) {
          logger.raw(err);
          logger.error('npm did not uninstall ' + app + ' correctly.');
          nodeHelpers.invoke(callback, err);
        } else {
          logger.info(app + ' successfully uninstalled.');
          configHelpers.watcher.one(callback);
          configHelpers.removeApp(app);
        }
      });
    }
  }
function ( app , callback ) { var cozyLight = require ( './cozy-light' ) ; var config = configHelpers . getConfig ( ) ; logger . info ( 'Uninstalling ' + app + '...' ) ; if ( config . apps [ app ] === undefined ) { logger . error ( app + ' is not installed.' ) ; nodeHelpers . invoke ( callback , true ) ; } else { var module = config . apps [ app ] . name ; npmHelpers . uninstall ( module , function removeAppFromConfig ( err ) { if ( err ) { logger . raw ( err ) ; logger . error ( 'npm did not uninstall ' + app + ' correctly.' ) ; nodeHelpers . invoke ( callback , err ) ; } else { logger . info ( app + ' successfully uninstalled.' ) ; configHelpers . watcher . one ( callback ) ; configHelpers . removeApp ( app ) ; } } ) ; } }
Remove app from config and its source from node module folder.

@param {String} app App to uninstall.
@param {Function} callback Termination.
Remove app from config and its source from node module folder .