expand logging

log/log.go

@@ -0,0 +1,31 @@
+package log
+
+import (
+	"flag"
+	"log/slog"
+	"os"
+)
+
+func Logger() {
+	// Get logger arguments
+	var loglevelStr string
+	flag.StringVar(&loglevelStr, "loglevel", "ERROR", "set log level")
+	flag.Parse()
+
+	loglevel := new(slog.LevelVar)
+	if loglevelStr == "DEBUG" {
+		loglevel.Set(slog.LevelDebug)
+	} else if loglevelStr == "INFO" {
+		loglevel.Set(slog.LevelInfo)
+	} else if loglevelStr == "WARN" {
+		loglevel.Set(slog.LevelWarn)
+	} else {
+		loglevel.Set(slog.LevelError)
+	}
+	// Start logger
+	logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+		Level: loglevel,
+	}))
+	slog.SetDefault(logger)
+	slog.Debug("Logging started", "level", loglevel)
+}