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Packages/com.unity.asset-store-tools/Editor/Utility/LegacyToolsRemover.cs

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+using System;
+using System.IO;
+using System.Reflection;
+using UnityEditor;
+using UnityEngine;
+
+namespace AssetStoreTools.Utility
+{
+    [InitializeOnLoad]
+    internal class LegacyToolsRemover
+    {
+        private const string MessagePart1 = "A legacy version of Asset Store Tools " +
+            "was detected at the following path:\n";
+        private const string MessagePart2 = "\n\nHaving both the legacy and the latest version installed at the same time is not supported " +
+            "and might prevent the latest version from functioning properly.\n\nWould you like the legacy version to be removed automatically?";
+
+        static LegacyToolsRemover()
+        {
+            try
+            {
+                if (Application.isBatchMode)
+                    return;
+
+                CheckAndRemoveLegacyTools();
+            }
+            catch { }
+        }
+
+        private static void CheckAndRemoveLegacyTools()
+        {
+            if (!ASToolsPreferences.Instance.LegacyVersionCheck || !ProjectContainsLegacyTools(out string path))
+                return;
+
+            var relativePath = path.Substring(Application.dataPath.Length - "Assets".Length).Replace("\\", "/");
+            var result = EditorUtility.DisplayDialog("Asset Store Tools", MessagePart1 + relativePath + MessagePart2, "Yes", "No");
+
+            // If "No" - do nothing
+            if (!result)
+                return;
+
+            // If "Yes" - remove legacy tools
+            File.Delete(path);
+            File.Delete(path + ".meta");
+            RemoveEmptyFolders(Path.GetDirectoryName(path)?.Replace("\\", "/"));
+            AssetDatabase.Refresh();
+
+            // We could also optionally prevent future execution here
+            // but the ProjectContainsLegacyTools() function runs in less
+            // than a milisecond on an empty project
+        }
+
+        private static bool ProjectContainsLegacyTools(out string path)
+        {
+            path = null;
+
+            foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies())
+            {
+                if (assembly.ManifestModule.Name == "AssetStoreTools.dll")
+                {
+                    path = assembly.Location;
+                    break;
+                }
+            }
+
+            if (string.IsNullOrEmpty(path))
+                return false;
+            return true;
+        }
+
+        private static void RemoveEmptyFolders(string directory)
+        {
+            if (directory.EndsWith(Application.dataPath))
+                return;
+
+            if (Directory.GetFiles(directory).Length == 0 && Directory.GetDirectories(directory).Length == 0)
+            {
+                var parentPath = Path.GetDirectoryName(directory).Replace("\\", "/");
+
+                Directory.Delete(directory);
+                File.Delete(directory + ".meta");
+
+                RemoveEmptyFolders(parentPath);
+            }
+        }
+    }
+}