How do I get Input Positive Button value in Runtime?

Question

In Unity in InputManager I assigned R Button to "Restart" name.

Now that property (Restart) has another property with a key "Positive Button" and string value "R".

In the game I can show notice to user: "click R for Restart!"

But what if user will change that key in the start config window? For example from R to T button.

Now the game should display notice: "click T for Restart!"

Question: How do I get changed Positive Button value by name "Restart" via script in Runtime? Is it possible?

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p.s. in Editor I can do this:

SerializedObject inputManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/InputManager.asset")[0]);
SerializedProperty axisArray = inputManager.FindProperty("m_Axes");

for (int i = 0; i < axisArray.arraySize; ++i) {
    var axis = axisArray.GetArrayElementAtIndex(i);
    var axisName = axis.FindPropertyRelative("m_Name").stringValue;
    if (axisName == "Restart") {
        restartButtonValue = axis.FindPropertyRelative("positiveButton").stringValue;
        break;
    }
}

But it allows to use it only in the Editor. Because it uses UnityEditor.dll

Answer 1

Unfortunatly, this isn't possible right now.
Like you said, it uses the Editor library.
The only option left is to use an entierely different system to manage all inputs. Take a look on the asset store for system like this.