Add version flag to display current version

internal/config/config.go

@@ -2,6 +2,7 @@ package config
 
 import (
 	"errors"
+	"fmt"
 	"log"
 	"os"
 	"strings"
@@ -13,6 +14,7 @@ import (
 )
 
 type CLI struct {
+	Version                    kong.VersionFlag `short:"v"`
 	NoConfigFile               bool             `short:"C" default:"false" help:"Disable config file creation."`
 	ConfigFilePath             string           `short:"c" default:"bibliomane.toml" type:"path" help:"Config file path."`
 	DisableStoreJWTKeyInConfig bool             `default:"false" help:"Do not store the generated key used for JWT when initializing configuration."`
@@ -61,12 +63,12 @@ func defaultConfig() CLI {
 	return CLI{NoConfigFile: false, ConfigFilePath: "bibliomane.toml", DisableStoreJWTKeyInConfig: false, ConfigFile: c}
 }
 
-func LoadConfig() Config {
+func LoadConfig(applicationVersion string) Config {
 
 	var cfg CLI
 
 	//parse first to get config path
-	kong.Parse(&cfg)
+	kong.Parse(&cfg, kong.Vars{"version": fmt.Sprintf("bibliomane v%s", applicationVersion)})
 
 	configPath := cfg.ConfigFilePath
 

main.go

@@ -6,7 +6,8 @@ import (
 )
 
 func main() {
-	c := config.LoadConfig()
+	applicationVersion := "0.0.0"
+	c := config.LoadConfig(applicationVersion)
 	r := setup.Setup(&c)
 	r.Run(":" + c.Port)
 }