Use flag '-v'

main.go

@@ -6,6 +6,7 @@ import (
 	"mqttListener/models"
 	"mqttListener/mqtt"
 
+	"flag"
 	"fmt"
 	"log"
 
@@ -38,6 +39,7 @@ var BuildDate string
 // Version holds contents of ./VERSION file, if exists, or the value passed via the -version option
 var Version string
 
+// PrintVersion prints version information
 func PrintVersion() {
 	var versionString string = GitSummary
 	fmt.Println("\n--------------------------------------------------------")
@@ -53,6 +55,13 @@ func PrintVersion() {
 // ---------------------------------------------------------------------------
 func main() {
 
+	versionFlagPtr := flag.Bool("v", false, "print version")
+	flag.Parse()
+	if *versionFlagPtr {
+		PrintVersion()
+		os.Exit(0)
+	}
+
 	PrintVersion()
 
 	c := make(chan os.Signal, 1)