Function addModuleToApp

src/install/index.js:254–263

* Add module to app's `./modules` folder. Default action is to copy. If * opts.link is truthy, create a symlink instead. * * @return {Promise}

(app, cacheEntry, moduleName, opts)

 */

function addModuleToApp (app, cacheEntry, moduleName, opts) {
  trace('addModuleToApp cacheEntry:', cacheEntry);
  moduleName = cacheEntry && cacheEntry.name || moduleName;

  if (opts.link) {
    return linkModuleIntoApp(app, cacheEntry);
  } else {
    return copyModuleIntoApp(app, cacheEntry);
  }
}

/**
 * The module installation for this app is a symlink. Remind the user :)