change empty filepath to executable name

logger_test.go

@@ -0,0 +1,42 @@
+package tecaminologger
+
+import (
+	"errors"
+	"os"
+	"testing"
+
+	"gitea.tecamino.com/paadi/tecamino-logger/logging"
+)
+
+func TestLogger(t *testing.T) {
+	t.Log("start logger test")
+	logFile := "Test.log"
+	log, err := logging.NewLogger(logFile, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	log.Info("line 10", "hallo")
+	log.Warning("line 11", "vello")
+	log.Error("line 12", "hie")
+	err = errors.New("test error")
+	log.Error("line 14", err)
+	log.Debug("line 15", "isch")
+
+	t.Log("read created log file")
+	f, err := os.ReadFile(logFile)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	t.Log("read created log file")
+	t.Log(string(f))
+
+	t.Log("test if log file name empty")
+	log, err = logging.NewLogger("", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	log.Info("test", "this is a text")
+
+}

logging/logging.go

@@ -3,6 +3,8 @@ package logging
 import (
 	"fmt"
 	"os"
+	"path/filepath"
+	"strings"
 	"time"
 
 	"go.uber.org/zap"
@@ -32,7 +34,8 @@ func NewLogger(file string, cfg *Config) (*Logger, error) {
 	}
 
 	if file == "" {
-		file = "NewLogger.log"
+		file = os.Args[0]
+		file = strings.Replace(filepath.Base(file), filepath.Ext(file), ".log", 1)
 	}
 
 	encoderConfig := zap.NewProductionEncoderConfig()
@@ -44,9 +47,9 @@ func NewLogger(file string, cfg *Config) (*Logger, error) {
 
 	fileSyncer := zapcore.AddSync(&lumberjack.Logger{
 		Filename:   file,
-		MaxSize:    1, // megabytes
-		MaxBackups: 3,
-		MaxAge:     28, // days
+		MaxSize:    cfg.MaxSize, // megabytes
+		MaxBackups: cfg.MaxBackup,
+		MaxAge:     cfg.MaxAge, // days
 	})
 
 	// Create core list

main.go

@@ -1,20 +0,0 @@
-package main
-
-import (
-	"errors"
-
-	"gitea.tecamino.com/paadi/tecamino-logger/logging"
-)
-
-func main() {
-	log, err := logging.NewLogger("Test.log", nil)
-	if err != nil {
-		panic(err)
-	}
-	log.Info("line 10", "hallo")
-	log.Warning("line 11", "vello")
-	log.Error("line 12", "hie")
-	err = errors.New("test error")
-	log.Error("line 14", err)
-	log.Debug("line 15", "isch")
-}