feat: add option to disable syslog logging (#53)

* feat: add option to disable syslog logging

* missing comments

* service flags

* initialize util.Logger

pkg/util/util.go

@@ -3,7 +3,6 @@ package util
 import (
 	"fmt"
 	"os"
-	"runtime"
 	"time"
 
 	jsoniter "github.com/json-iterator/go"
@@ -11,8 +10,8 @@ import (
 )
 
 var (
-	Json   = jsoniter.ConfigCompatibleWithStandardLibrary
-	Logger service.Logger
+	Json                  = jsoniter.ConfigCompatibleWithStandardLibrary
+	Logger service.Logger = service.ConsoleLogger
 )
 
 func IsWindows() bool {
@@ -21,11 +20,6 @@ func IsWindows() bool {
 
 func Println(enabled bool, v ...interface{}) {
 	if enabled {
-		if runtime.GOOS != "darwin" {
-			Logger.Infof("NEZHA@%s>> %v", time.Now().Format("2006-01-02 15:04:05"), fmt.Sprint(v...))
-		} else {
-			fmt.Printf("NEZHA@%s>> ", time.Now().Format("2006-01-02 15:04:05"))
-			fmt.Println(v...)
-		}
+		Logger.Infof("NEZHA@%s>> %v", time.Now().Format("2006-01-02 15:04:05"), fmt.Sprint(v...))
 	}
 }