treatment: modify tags, check err on flag

cmd/treatment/circleci.go

@@ -1,4 +1,4 @@
-// +build circleci
+// +build !pi3
 
 /*
 DESCRIPTION

cmd/treatment/main.go

@@ -69,9 +69,7 @@ const (
 const (
 	netSendRetryTime = 5 * time.Second
 	defaultSleepTime = 60 // Seconds
-	profilePath      = "rv.prof"
 	pkg              = "rv: "
-	runPreDelay      = 20 * time.Second
 )
 
 // Treatment modes.
@@ -92,7 +90,6 @@ func main() {
 	// Set up the player command with audio file path.
 	filePtr := flag.String("path", "", "Path to sound file we wish to play.")
 	flag.Parse()
-	cmd := exec.Command(audioCmd, *filePtr)
 
 	// Create lumberjack logger to handle logging to file.
 	fileLog := &lumberjack.Logger{
@@ -109,6 +106,11 @@ func main() {
 	// lumberjack and netloggers.
 	log := logger.New(logVerbosity, io.MultiWriter(fileLog, netLog), logSuppress)
 
+	if *filePtr == "" {
+		log.Log(logger.Fatal, "no file path provided, check usage")
+	}
+	cmd := exec.Command(audioCmd, *filePtr)
+
 	// The netsender client will handle communication with netreceiver and GPIO stuff.
 	log.Log(logger.Debug, "initialising netsender client")
 	ns, err := netsender.New(log, gpio.InitPin, gpio.ReadPin, gpio.WritePin, varMap)

cmd/treatment/pi3.go

@@ -1,4 +1,4 @@
-// +build !circleci
+// +build pi3
 
 /*
 DESCRIPTION