Version printing from command line arguments

main.go

@@ -36,6 +36,7 @@ var (
 	FlagConfig         string
 	FlagCreateUser     string
 	FlagChangePassword string
+	FlagVersion        bool
 	Webengine          HTMLTemplate.Engine
 	config             Config
 	Log                *slog.Logger
@@ -66,6 +67,7 @@ func init() { // {{{
 	flag.BoolVar(&FlagLoremIpsum, "lorem-ipsum", false, "Replace all G- nodes with lorem ipsum paragraphs")
 	flag.StringVar(&FlagCreateUser, "create-user", "", "Username for creating a new user")
 	flag.StringVar(&FlagChangePassword, "change-password", "", "Change the password for the given username")
+	flag.BoolVar(&FlagVersion, "version", false, "Print version and exit")
 	flag.Parse()
 
 	RxpBearerToken = regexp.MustCompile("(?i)^\\s*Bearer\\s+(.*?)\\s*$")
@@ -76,7 +78,14 @@ func initLog() { // {{{
 	Log = slog.New(slog.NewJSONHandler(os.Stdout, &opts))
 } // }}}
 func main() { // {{{
+	if FlagVersion {
+		fmt.Println(VERSION)
+		return
+	}
+
 	initLog()
+	Log.Info("application", "version", VERSION)
+
 	err := readConfig(FlagConfig)
 	if err != nil {
 		Log.Error("config", "error", err)