Unity Define Symbols Utility

DefineSymbolUtil.cs

using UnityEditor;
using UnityEngine;
using System.Linq;
using UnityEditor.Callbacks;

namespace Ashkatchap {
	public static class DefineSymbolUtil {
		static readonly (string, string)[] TypeAndSymbol = new[] {
			("UltEvents.UltEventBase, UltEvents, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", "USE_ULTEVENTS"),
		};

		[DidReloadScripts]
		static void Verify() {
			foreach (var elem in TypeAndSymbol) Verify(elem.Item1, elem.Item2);
		}

		[InitializeOnLoadMethod]
		static void OnInitialized() {
			//AssemblyReloadEvents.afterAssemblyReload += Verify;
			Application.logMessageReceived += (a, b, c) => {
				if (c == LogType.Error && a.Contains("CS0246")) { // Type not found error.
					// Continually repeats recompilation if there's an error CS0246 inside code surrounded by #if "symbos in TypeAndSymbol" and the Type exists.
					foreach (var elem in TypeAndSymbol) RemoveDefine(elem.Item2);
				}
			};
		}

		public static void Verify(string typeName, string symbol) {
			bool wantSymbol = System.Type.GetType(typeName) != null;
			bool hasSymbol = PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup).Split(';').Contains(symbol);
			if (wantSymbol != hasSymbol) {
				if (wantSymbol) AddDefine(symbol);
				else RemoveDefine(symbol);
			}
		}

		public static void AddDefine(string def) {
			Debug.Log($"Adding definition '{def}'.");
			PlayerSettings.SetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup,
				PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup) + (";" + def + ";"));
		}
		public static void RemoveDefine(string def) {
			Debug.Log($"Removing definition '{def}'.");
			PlayerSettings.SetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup,
				string.Join(";", PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup).Split(';').Where(d => d != def)));
		}
	}
}