Completely rebuild the tree generation logic.

controllers/definitions.go

@@ -1,8 +1,6 @@
 package controllers
 
 // +kubebuilder:validation:Enum=Allow;Forbid;Replace
-type ExecutionStatus string
-
 const (
 	ExecutionStatusPending   string = "pending"
 	ExecutionStatusRunning   string = "running"
@@ -15,3 +13,29 @@ const (
 var (
 	jobOwnerKey = ".metadata.controller"
 )
+
+type (
+	ExecutionStatus string
+
+	tree struct {
+		text  string
+		items []Tree
+	}
+
+	// Tree is tree interface
+	Tree interface {
+		Add(text string) Tree
+		AddTree(tree Tree)
+		Items() []Tree
+		Text() string
+		Print() string
+	}
+
+	printer struct {
+	}
+
+	// Printer is printer interface
+	Printer interface {
+		Print(Tree) string
+	}
+)