Unity - add Animator, Animator Controller and Animation to GameObject in hierarchy

AnimatorHelper.cs

// ===============================
// AUTHOR          : J. Giezendanner
// CREATE DATE     : 18.02.2020
// MODIFIED DATE   : 
// PURPOSE         : Adds a context menu to create an Animator Component, Animator Controller
//                   and Animation to a GameObject in the hierarchy
// SPECIAL NOTES   : 
// ===============================
// Change History:
//==================================


using System.IO;
using UnityEditor;
using UnityEditor.Animations;
using UnityEngine;
using Debug = UnityEngine.Debug;

namespace Editor
{
    public static class AnimatorHelper
    {
        [MenuItem("GameObject/Giezi's tools/Add Animator, Animator Controller and Animation", false, 0)]
        static void AddRequiredComponents()
        {
            if (Selection.activeGameObject != null)
            {
                GameObject go = Selection.activeGameObject;

                Animator animator;
            
                string assetPath = Application.dataPath + Path.DirectorySeparatorChar + "Animations" + Path.DirectorySeparatorChar;
                string path = EditorUtility.SaveFilePanel("Save controller and animation", assetPath, "New Animation","");
                if (path.Length == 0)
                    return;
            
                if (go.GetComponent<Animator>() != null)
                {
                    Debug.Log("Object already contains animator");
                    if (EditorUtility.DisplayDialog("Use existing animator?",
                        "Are you sure you want to use the existing animator?", "Yes", "No"))
                        animator = go.GetComponent<Animator>();
                    else
                    {
                        Debug.Log("Aborted operation");
                        return;
                    }
                }else
                    animator = go.AddComponent<Animator>();
            
                path = path.Replace(Application.dataPath + Path.AltDirectorySeparatorChar, "");
                path = "Assets" + Path.AltDirectorySeparatorChar + path;
            
                string name = Path.GetFileNameWithoutExtension(path);
                string dir = Path.GetDirectoryName(path);
            
            
                AnimationClip clip = new AnimationClip();
                AnimationClipSettings settings = AnimationUtility.GetAnimationClipSettings(clip);
                settings.loopTime = true;
                AnimationUtility.SetAnimationClipSettings(clip,settings);
                AssetDatabase.CreateAsset(clip, dir + Path.DirectorySeparatorChar + name + ".anim");
            
            
                AnimatorController animatorController = UnityEditor.Animations.AnimatorController.CreateAnimatorControllerAtPathWithClip(dir + Path.DirectorySeparatorChar + name + ".controller", clip);
                animator.runtimeAnimatorController = animatorController;
            }
        }
    }
}