update

Author: inc8877

.gitignore

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+*.DS_Store
+*.meta

Editor/Unity.DebugModeDefineSymbol.Editor.asmdef

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+{
+	"name": "Unity.DebugModeDefineSymbol.Editor"
+}

Editor/UnityDebugModeDefineSymbol.cs

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+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+
+namespace UnityDebugModeDefineSymbol.Editor
+{
+    internal static class DebugModeDefineSymbol
+    {
+        private static bool _debugIsOn;
+        private const string debugModeSymbol = "DEBUG_MODE_IN_USE";
+
+    
+        [MenuItem("Tools/Debug Mode Definition/On")]
+        internal static void TurnOnDebugModeDefinition()
+        {
+            _debugIsOn = GetState(); 
+            if (_debugIsOn)
+            {
+                EditorUtility.DisplayDialog("Debug mode definition is turned On",
+                    "DEBUG_MODE_IN_USE is already included in the scripting define symbols", "OK");
+            }
+            else
+            {
+                if (EditorUtility.DisplayDialog("Turn on the debug mode definition?",
+                    "If the debug mode enabled, all the code in the definition 'DEBUG_MODE_IN_USE' will be executed", "Yes", "No"))
+                {
+                    _debugIsOn = true;
+                    PlayerPrefs.SetInt("debugModeInUseKey", 1);
+                    DefineSymbols();
+                }
+            }
+        }
+        [MenuItem("Tools/Debug Mode Definition/Off")]
+        internal static void TurnOffDebugModeDefinition()
+        {
+            _debugIsOn = GetState();
+            if (!_debugIsOn)
+            {
+                EditorUtility.DisplayDialog("Debug mode definition is already turned off",
+                    "The code in the 'DEBUG_MODE_IN_USE' definition is not executed", "OK");
+            }
+            else
+            {
+                if (EditorUtility.DisplayDialog("Turn off the debug mode definition?",
+                    "The code in the 'DEBUG_MODE_IN_USE' definition will not be execute", "Yes", "No"))
+                {
+                    _debugIsOn = false;
+                    PlayerPrefs.SetInt("debugModeInUseKey", 0);
+                    DefineSymbols();
+                }
+            }
+        }
+
+        private static bool GetState() => PlayerPrefs.GetInt("debugModeInUseKey", 0) == 1;
+        
+        private static void DefineSymbols()
+        {
+            BuildTargetGroup currentTarget = EditorUserBuildSettings.selectedBuildTargetGroup;
+        
+            List<string> scriptingSymbols = 
+                new List<string>(PlayerSettings.GetScriptingDefineSymbolsForGroup(currentTarget).Split(';'));
+        
+            if (_debugIsOn)
+            {
+                if (!scriptingSymbols.Contains(debugModeSymbol)) scriptingSymbols.Add(debugModeSymbol);
+                else return;
+            }
+            else
+            {
+                if (scriptingSymbols.Contains(debugModeSymbol)) scriptingSymbols.Remove(debugModeSymbol);
+                else return;
+            }
+
+            string finalScriptingSymbols = string.Join(";", scriptingSymbols.ToArray()); 
+            PlayerSettings.SetScriptingDefineSymbolsForGroup(currentTarget, finalScriptingSymbols);
+        }
+    }
+}

README.md

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 # UnityDebugModeDefineSymbol
-A useful tool for running specific code
+A useful tool for running specific code <br>
+[What it is?](https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives/preprocessor-if)
+
+
+### Compatibility
+|  Unity  | Compatible |
+|:-------:|:----------:|
+|  2020   |:white_check_mark:|
+|  2019   |:white_check_mark:|
+
+## How to use
+1. Add source code of this repo to your project
+2. Manage debug mode by following this path `Tools -> Debug Mode Definition ->` `On` / `Off`
+<img width="372" alt="choiceDiaologWindow" src="https://user-images.githubusercontent.com/29813954/110636484-fa65bd00-81b4-11eb-88e9-c0b55ad82a21.png">
+
+3. For code that should be executed only when the debug mode is turned on, put it in the definition like this:
+
+```c#
+// ... code somewhere
+#if DEBUG_MODE_IN_USE
+// code here will be executed if the debug mode is turned on
+#endif
+// ... code somewhere
+```