func (app *App) CheckFiles( settings config.Settings, userInterface ui.UserInterface) (err error) { localDescriptor := app.GetLocalDescriptor() remoteDescriptor := app.GetRemoteDescriptor() if remoteDescriptor == nil { log.Notice("Skipping file check, as the remote descriptor is missing") return nil } userInterface.SetHeader("Checking the app files") log.Notice("Computing differences...") packagesToUpdate := app.getPackagesToUpdate() if len(packagesToUpdate) == 0 { log.Notice("All the packages are up-to-date") return nil } if localDescriptor != nil && caravel.FileExists(app.GetLocalDescriptorPath()) { log.Info("Deleting the local descriptor before starting the update process...") err = os.Remove(app.GetLocalDescriptorPath()) if err != nil { return err } log.Notice("Local descriptor deleted") } retrieveAllPackages := (len(packagesToUpdate) == len(remoteDescriptor.GetPackageVersions())) log.Notice("Must retrieve all the remote packages? %v", retrieveAllPackages) if retrieveAllPackages { log.Info("Removing app files dir...") err = os.RemoveAll(app.filesDirectory) if err != nil { return err } log.Notice("App files dir removed") } for packageIndex, packageName := range packagesToUpdate { userInterface.SetHeader( fmt.Sprintf("Updating package %v of %v: %v", packageIndex+1, len(packagesToUpdate), packageName)) log.Notice("Downloading %v...", packageName) err = app.installPackage( packageName, settings, func(retrievedSize int64, totalSize int64) { log.Notice("Retrieved: %v / %v bytes", retrievedSize, totalSize) userInterface.SetProgress(float64(retrievedSize) / float64(totalSize)) }) if err != nil { return err } } log.Notice("App files checked") return nil }