refactor: enhancement of logging, config and metrics

cmd/config/init.go

@@ -16,9 +16,10 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 import (
+	"fmt"
 	"github.com/jkaninda/goma-gateway/internal"
-	"github.com/jkaninda/goma-gateway/pkg/logger"
 	"github.com/spf13/cobra"
+	"os"
 )
 
 var InitConfigCmd = &cobra.Command{
@@ -26,14 +27,34 @@ var InitConfigCmd = &cobra.Command{
 	Short: "Initialize Goma Gateway configuration file",
 	Run: func(cmd *cobra.Command, args []string) {
 		if len(args) == 0 {
-			pkg.InitConfig(cmd)
+			force, _ := cmd.Flags().GetBool("force")
+			configFile, _ := cmd.Flags().GetString("output")
+			if configFile == "" {
+				fmt.Println("Error: no config file specified")
+				os.Exit(1)
+			}
+			// Check if the config file exists
+			if _, err := os.Stat(configFile); !os.IsNotExist(err) {
+				if !force {
+					fmt.Printf("%s config file already exists, use -f to overwrite\n", configFile)
+					os.Exit(1)
+				}
+			}
+			err := pkg.InitConfig(configFile)
+			if err != nil {
+				fmt.Println(err)
+				os.Exit(1)
+			}
+			fmt.Println("configuration file has been initialized successfully")
 		} else {
-			logger.Fatal(`"config" accepts no argument %q`, args)
+			fmt.Printf("config accepts no argument %q\n", args)
+			os.Exit(1)
 		}
 
 	},
 }
 
 func init() {
-	InitConfigCmd.Flags().StringP("output", "o", "", "config file output")
+	InitConfigCmd.Flags().StringP("output", "o", "", "configuration file output")
+	InitConfigCmd.Flags().BoolP("force", "f", false, "Force overwrite configuration file")
 }