Clean up linter errors

updates/export.go

@@ -49,21 +49,19 @@ func initVersionExport() (err error) {
 		return err
 	}
 
-	module.RegisterEventHook(
+	return module.RegisterEventHook(
 		"updates",
 		eventVersionUpdate,
 		"export version status",
 		export,
 	)
-	return nil
 }
 
 func stopVersionExport() error {
 	return versionExportHook.Cancel()
 }
 
-var exportMicroTaskName = "update version status"
-
+// export is an event hook
 func export(_ context.Context, _ interface{}) error {
 	// populate
 	versionExport.lock.Lock()

updates/main.go

@@ -100,9 +100,7 @@ func start() error {
 	}).Repeat(24 * time.Hour).MaxDelay(1 * time.Hour).Schedule(time.Now().Add(10 * time.Second))
 
 	// react to upgrades
-	initUpgrader()
-
-	return nil
+	return initUpgrader()
 }
 
 func stop() error {

updates/upgrader.go

@@ -28,16 +28,15 @@ const (
 )
 
 var (
-	upgraderActive    = abool.NewBool(false)
-	dontUpgradeBefore = time.Now().Add(5 * time.Minute)
-	pmCtrlUpdate      *updater.File
-	pmCoreUpdate      *updater.File
+	upgraderActive = abool.NewBool(false)
+	pmCtrlUpdate   *updater.File
+	pmCoreUpdate   *updater.File
 
 	rawVersionRegex = regexp.MustCompile(`^[0-9]+\.[0-9]+\.[0-9]+b?\*?$`)
 )
 
-func initUpgrader() {
-	module.RegisterEventHook(
+func initUpgrader() error {
+	return module.RegisterEventHook(
 		"updates",
 		eventResourceUpdate,
 		"run upgrades",