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
}
/*
Run is the entry point you must employ to create a custom installer, for example to
employ custom settings or a brand-new user interface, based on any technology
*/
func Run(
launcher launchers.Launcher,
userInterface ui.UserInterface,
bootDescriptor descriptors.AppDescriptor) (err error) {
settings := launcher.GetSettings()
//----------------------------------------------------------------------------
setupUserInterface(launcher, userInterface)
defer dismissUserInterface(userInterface)
//----------------------------------------------------------------------------
userInterface.SetHeader("Performing startup operations")
log.Debug("The boot descriptor is: %#v", bootDescriptor)
//----------------------------------------------------------------------------
userInterface.SetApp(bootDescriptor.GetName())
//----------------------------------------------------------------------------
appGallery := apps.NewAppGallery(settings.GetGalleryDirectory())
log.Debug("The app gallery is: %#v", appGallery)
//----------------------------------------------------------------------------
log.Info("Resolving the app...")
app, err := appGallery.GetApp(bootDescriptor)
if err != nil {
return err
}
log.Notice("The app directory is: '%v'", app.Directory)
log.Debug("App is: %#v", app)
firstRun := !app.DirectoryExists()
log.Debug("Is this a first run for the app? %v", firstRun)
//----------------------------------------------------------------------------
if firstRun {
log.Info("Now asking the user if the app can run...")
canRun := app.CanPerformFirstRun(userInterface)
if !canRun {
return &ExecutionCanceled{}
}
log.Debug("The user agreed to proceed")
log.Info("Ensuring the app dir is available...")
err = app.EnsureDirectory()
if err != nil {
return err
}
log.Notice("App dir available")
}
//----------------------------------------------------------------------------
log.Info("Locking the app dir...")
err = app.LockDirectory()
if err != nil {
return err
}
defer func() {
unlockErr := app.UnlockDirectory()
if unlockErr != nil {
log.Warning(unlockErr.Error())
}
}()
log.Notice("App dir locked")
//----------------------------------------------------------------------------
log.Info("Checking for conflicting local descriptors...")
err = app.CheckForConflictingLocalDescriptors()
if err != nil {
return err
}
log.Notice("No conflicting local descriptors found")
//----------------------------------------------------------------------------
log.Info("Resolving the local descriptor...")
localDescriptor := app.GetLocalDescriptor()
startedWithLocalDescriptor := localDescriptor != nil
log.Debug("Started with local descriptor? %v", startedWithLocalDescriptor)
if startedWithLocalDescriptor {
log.Info("Checking that local descriptor and boot descriptor actually match...")
err = descriptors.CheckDescriptorMatch(localDescriptor, bootDescriptor)
if err != nil {
return err
}
log.Notice("The descriptors match correctly")
}
//----------------------------------------------------------------------------
log.Info("Resolving the remote descriptor...")
remoteDescriptor := app.GetRemoteDescriptor()
if remoteDescriptor != nil {
log.Info("Checking that remote descriptor and boot descriptor actually match...")
err = descriptors.CheckDescriptorMatch(remoteDescriptor, bootDescriptor)
if err != nil {
return err
}
log.Notice("The descriptors match correctly")
}
//----------------------------------------------------------------------------
log.Info("Now choosing the reference descriptor...")
referenceDescriptor, err := app.GetReferenceDescriptor()
if err != nil {
return err
}
log.Notice("Reference descriptor chosen")
log.Debug("The reference descriptor is: %#v", referenceDescriptor)
//----------------------------------------------------------------------------
err = referenceDescriptor.CheckRequirements()
if err != nil {
return err
}
//----------------------------------------------------------------------------
userInterface.SetApp(referenceDescriptor.GetTitle())
//----------------------------------------------------------------------------
log.Info("Resolving the OS-specific app command line...")
commandLine := referenceDescriptor.GetCommandLine()
log.Notice("Command line resolved")
log.Debug("Command line is: %v", commandLine)
//----------------------------------------------------------------------------
err = app.CheckFiles(settings, userInterface)
if err != nil {
return err
}
//----------------------------------------------------------------------------
userInterface.SetHeader("Preparing the command...")
log.Info("Creating the command...")
command := app.PrepareCommand(commandLine)
log.Notice("Command created")
log.Debug("Command path: %v", command.Path)
log.Debug("Command arguments: %v", command.Args)
//----------------------------------------------------------------------------
referenceDescriptorSaved := app.SaveReferenceDescriptor()
if !startedWithLocalDescriptor && referenceDescriptorSaved {
if userInterface.AskForDesktopShortcut(referenceDescriptor) {
log.Info("Creating desktop shortcut...")
err = app.CreateDesktopShortcut(launcher, referenceDescriptor)
if err != nil {
log.Warning("Could not create desktop shortcut: %v", err)
} else {
log.Notice("Desktop shortcut created")
}
} else {
log.Info("The user refused to create a desktop shortcut")
}
}
//----------------------------------------------------------------------------
app.UnlockDirectory()
//----------------------------------------------------------------------------
userInterface.SetHeader("Launching the application")
userInterface.SetStatus("")
return app.Launch(command, settings, userInterface)
}