feat: add utility function to log caller information and clean up handler

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)
+}

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")
-
-			}
-		}
-	}
 }