From ecacad737ac436ae2a5f000645b6f0693879c2a6 Mon Sep 17 00:00:00 2001
From: Zpekii <zpekii3156@qq.com>
Date: Sat, 10 Jan 2026 17:19:14 +0800
Subject: [PATCH] feat: add utility function to log caller information and
 clean up handler

---
 cmn/utils/utils.go | 21 +++++++++++++++++++++
 hello/hello.go     | 12 ++----------
 2 files changed, 23 insertions(+), 10 deletions(-)
 create mode 100644 cmn/utils/utils.go

diff --git a/cmn/utils/utils.go b/cmn/utils/utils.go
new file mode 100644
index 0000000..3c57778
--- /dev/null
+++ b/cmn/utils/utils.go
@@ -0,0 +1,21 @@
+package utils //nolint:revive
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// Fnc prints the caller function name, file and line number.
+func Fnc() {
+	pc, file, line, ok := runtime.Caller(1)
+	if !ok {
+		fmt.Println("unable to get caller")
+		return
+	}
+	fn := runtime.FuncForPC(pc)
+	name := "unknown"
+	if fn != nil {
+		name = fn.Name()
+	}
+	fmt.Printf("%s %s:%d <----\n", name, file, line)
+}
diff --git a/hello/hello.go b/hello/hello.go
index f71e7fa..7e24e63 100644
--- a/hello/hello.go
+++ b/hello/hello.go
@@ -1,19 +1,11 @@
 package hello
 
 import (
-	"fmt"
+	"k8s-example/cmn/utils"
 	"net/http"
 )
 
 func Handler(w http.ResponseWriter, _ *http.Request) {
+	utils.Fnc()
 	_, _ = w.Write([]byte("Hello, World!"))
-
-	if true {
-		if true {
-			if true {
-				fmt.Println("Deeply nested condition")
-
-			}
-		}
-	}
 }