feature: cleanup serviceAccount

internal/utils/diff.go

@@ -0,0 +1,23 @@
+package utils
+
+import (
+	"k8s.io/apimachinery/pkg/types"
+)
+
+// DiffNamespacedNames returns the namespaced names that are in target but not in reference.
+func DiffNamespacedNames(target, reference []types.NamespacedName) []types.NamespacedName {
+	referenceSet := make(map[types.NamespacedName]struct{})
+
+	for _, item := range reference {
+		referenceSet[item] = struct{}{}
+	}
+
+	diff := []types.NamespacedName{}
+	for _, item := range target {
+		if _, exists := referenceSet[item]; !exists {
+			diff = append(diff, item)
+		}
+	}
+
+	return diff
+}