A simple little editor extension to copy and paste all components

ComponentsCopier.cs

/*
    A simple little editor extension to copy and paste all components
    Help from http://answers.unity3d.com/questions/541045/copy-all-components-from-one-character-to-another.html

    license: WTFPL (http://www.wtfpl.net/)
    author: aeroson
*/

using UnityEngine;
using UnityEditor;
using System.Collections;

public class ComponentsCopier : EditorWindow
{

    static Component[] copiedComponents;

    [MenuItem("GameObject/Copy all components %&C")]
    static void Copy()
    {
        copiedComponents = Selection.activeGameObject.GetComponents<Component>();
    }

    [MenuItem("GameObject/Paste all components %&P")]
    static void Paste()
    {
        foreach (var targetGameObject in Selection.gameObjects)
        {
            if (!targetGameObject || copiedComponents == null) continue;
            foreach (var copiedComponent in copiedComponents)
            {
                if (!copiedComponent) continue;
                UnityEditorInternal.ComponentUtility.CopyComponent(copiedComponent);
                UnityEditorInternal.ComponentUtility.PasteComponentAsNew(targetGameObject);
            }
        }
    }

}

Why EditorWindow is here? Also, it's better to check copiedComponents == null first and only then iterate over Selection.gameObjects. CopyComponent and PasteComponentAsNew return bool, so it's better to check it either and log warning or error.

I agree, feel free to upload improved version and link it here.

https://gist.github.com/frekons/2d002e560e8251e01841e2d83e8bf364

Hi, is there a demo to show how to use this script in the editor? I have added it to the editor folder in Unity but im not sure how to use it.

Hi, is there a demo to show how to use this script in the editor? I have added it to the editor folder in Unity but im not sure how to use it.

You can read up about MenuItem https://docs.unity3d.com/ScriptReference/MenuItem.html to understand it more

Would be nice to preserve cross-references between components, but that would be probably way harder to implement.