feat: add version

config.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"flag"
 	"gtt/internal/color"
 	"os"
 
@@ -9,9 +8,6 @@ import (
 )
 
 var (
-	// argument
-	srcLangArg *string = flag.String("src", "", "Source Language")
-	dstLangArg *string = flag.String("dst", "", "Destination Language")
 	// settings
 	config    = viper.New()
 	style     = color.NewStyle()
@@ -48,7 +44,6 @@ func configInit() {
 	}
 
 	// setup
-	flag.Parse()
 	if len(*srcLangArg) > 0 {
 		translator.SrcLang = *srcLangArg
 	} else {

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"flag"
 	"gtt/internal/translate"
 	"gtt/internal/ui"
 
@@ -8,6 +9,11 @@ import (
 )
 
 var (
+	// version
+	version string
+	// argument
+	srcLangArg *string = flag.String("src", "", "Set source language")
+	dstLangArg *string = flag.String("dst", "", "Set destination language")
 	// Translate
 	translator = translate.NewTranslator()
 	// UI
@@ -44,6 +50,13 @@ var (
 )
 
 func main() {
+	showVersion := flag.Bool("version", false, "Show version")
+	flag.Parse()
+
+	switch {
+	case *showVersion:
+		print(version, "\n")
+	default:
 		SetTermTitle("GTT")
 		configInit()
 		uiInit()
@@ -61,3 +74,4 @@ func main() {
 		// Check if config need to update
 		defer updateConfig()
 	}
+}