PrefabUtility.CreateEmptyPrefab

Description

Creates an empty prefab at given path.

If a prefab at the path already exists it will be deleted and replaced with an empty prefab. Returns a reference to the prefab.

// Creates a prefab from the selected GameObjects.
// If the prefab already exists it asks if you want to replace it.

#pragma strict

@MenuItem("Examples/Create Prefab From Selected")
static function CreatePrefab() {

    var objs = Selection.gameObjects;

    for (var go : GameObject in objs) {
        var localPath : String = "Assets/" + go.name + ".prefab";
        if (AssetDatabase.LoadAssetAtPath(localPath, GameObject)) {
            if (EditorUtility.DisplayDialog("Are you sure?", 
                "The prefab already exists. Do you want to overwrite it?", 
                "Yes", 
                "No"))
                    CreateNew(go, localPath);
        }
        else
            CreateNew(go, localPath);
    }
}
@MenuItem("Examples/Create Prefab From Selected", true)
static function ValidateCreatePrefab() {
    return Selection.activeGameObject != null;
}

static function CreateNew(obj : GameObject, localPath : String) {
    var prefab : Object = PrefabUtility.CreateEmptyPrefab(localPath);
    PrefabUtility.ReplacePrefab(obj, prefab, ReplacePrefabOptions.ConnectToPrefab);
}

// Creates a prefab from the selected GameObjects.
// If the prefab already exists it asks if you want to replace it.
using UnityEngine;
using UnityEditor;

public class CreatePrefabExample : EditorWindow {

    
    [MenuItem ("Examples/October/CreatePrefabExample")]
    static void CreatePrefab() {
        GameObject[] objs = Selection.gameObjects;
        
        if (objs.Length == 0) {
            Debug.Log("No GameObjects selected.");
            return;
        }
        
        foreach (GameObject go in objs) {
            Debug.Log("foreach: " + go.name);
            string localPath = "Assets/October/" + go.name + ".prefab";
            if (AssetDatabase.LoadAssetAtPath(localPath, typeof(GameObject))) {
                Debug.Log("no idea, but something");
                if (EditorUtility.DisplayDialog("Are you sure?", 
                    "The prefab already exists. Do you want to overwrite it?", 
                    "Yes", 
                    "No")) {
                        Debug.Log("DisplayDialog took yes");
                        CreateNew(go, localPath);
                    }
            } else {
                Debug.Log(go.name + " is not a prefab, will convert");
                CreateNew(go, localPath);
            } 
        }
    }
    
    static void CreateNew(GameObject obj, string localPath) {
        Debug.Log("CreateNew: " + obj.name + " : " + localPath);
        Object prefab = PrefabUtility.CreateEmptyPrefab(localPath);
        PrefabUtility.ReplacePrefab(obj, prefab, ReplacePrefabOptions.ConnectToPrefab);
    }


}