started structuring project for testing + lint driven various refactoring

modules/ble_recon.go

@@ -241,8 +241,11 @@ func (d *BLERecon) onPeriphDisconnected(p gatt.Peripheral, err error) {
 }
 
 func (d *BLERecon) onPeriphConnected(p gatt.Peripheral, err error) {
-	// timed out
-	if d.currDevice == nil {
+	if err != nil {
+		log.Warning("Connected to %s but with error: %s", p.ID(), err)
+		return
+	} else if d.currDevice == nil {
+		// timed out
 		log.Warning("Connected to %s but after the timeout :(", p.ID())
 		return
 	}

modules/events_stream.go

@@ -162,7 +162,6 @@ func (s *EventsStream) Start() error {
 				} else {
 					log.Debug("Skipping ignored event %v", e)
 				}
-				break
 
 			case <-s.quit:
 				return

modules/mac_changer.go

@@ -81,9 +81,9 @@ func (mc *MacChanger) Configure() (err error) {
 }
 
 func (mc *MacChanger) setMac(mac net.HardwareAddr) error {
-	os := runtime.GOOS
-	args := []string{}
+	var args []string
 
+	os := runtime.GOOS
 	if strings.Contains(os, "bsd") || os == "darwin" {
 		args = []string{mc.iface, "ether", mac.String()}
 	} else if os == "linux" || os == "android" {