Cloud Build Helper - Get Build number for Unity Cloud Build

CloudBuildHelper.cs

using UnityEngine;
using UnityEditor;
using System;

public class CloudBuildHelper : MonoBehaviour
{
    #if UNITY_CLOUD_BUILD
    public static void PreExport(UnityEngine.CloudBuild.BuildManifestObject manifest)
    {
        /*
        string buildNumber = manifest.GetValue("buildNumber", "0");
        Debug.LogWarning("Setting build number to " + buildNumber);
        
        PlayerSettings.Android.bundleVersionCode = int.Parse(buildNumber);
        PlayerSettings.iOS.buildNumber = buildNumber;
        */
        string path = "Assets/Resources/VersionNumber.txt";
        StreamWriter writer = new StreamWriter(path, false);
        writer.WriteLine(GetVersionNumberString());
        writer.Close();
    }
    #endif
}