add logger

pkg/logger/logger.go

@@ -0,0 +1,29 @@
+package logger
+
+import (
+	"log"
+
+	"go.uber.org/zap"
+)
+
+// Sugar is a global instance of the zap sugared logger.
+var Sugar *zap.SugaredLogger
+
+// Init initializes the global logger and returns a cleanup function.
+// The cleanup function should be deferred in the main function.
+func Init() func() {
+	// NewProduction builds a sensible production logger that writes InfoLevel and
+	// above logs to standard error.
+	coreLogger, err := zap.NewDevelopment()
+	if err != nil {
+		log.Fatalf("can't initialize zap logger: %v", err)
+	}
+
+	// Assign the sugared logger to our global variable.
+	Sugar = coreLogger.Sugar()
+
+	// Return the Sync function to be deferred by the caller.
+	return func() {
+		_ = coreLogger.Sync()
+	}
+}