Started using guids instead of paths for edited prefabs

This is done to properly handle cases when prefabs are moved or deleted in Play Mode.

Author: SolidAlloy

Editor/Prefab Handling/ChangedPrefabs.cs

@@ -14,7 +14,7 @@ internal class ChangedPrefabs : IEnumerable<ValueTuple<string, string>>
     {
         private const string KeyName = nameof(ChangedPrefabs);
 
-        [SerializeField] private string[] _paths;
+        [SerializeField] private string[] _guids;
         [SerializeField] private string[] _contents;
 
         private static ChangedPrefabs _instance;
@@ -35,12 +35,12 @@ public static ChangedPrefabs Instance
             }
         }
 
-        public (string path, string content) this[int index]
+        public (string guid, string content) this[int index]
         {
-            get => (_paths[index], _contents[index]);
+            get => (_guids[index], _contents[index]);
             set
             {
-                _paths[index] = value.path;
+                _guids[index] = value.guid;
                 _contents[index] = value.content;
             }
         }
@@ -49,7 +49,7 @@ public static void Initialize(int length)
         {
             _instance = new ChangedPrefabs
             {
-                _paths = new string[length],
+                _guids = new string[length],
                 _contents = new string[length]
             };
         }
@@ -101,7 +101,7 @@ public Enumerator(ChangedPrefabs instance)
 
             public bool MoveNext()
             {
-                return ++_index < Instance._paths.Length;
+                return ++_index < Instance._guids.Length;
             }
 
             public void Reset() => _index = 0;

Editor/Prefab Handling/PrefabFolderStripper.cs

@@ -74,7 +74,7 @@ private static void StripFoldersFromDependentPrefabs()
             for (int i = 0; i < prefabsWithLabel.Length; i++)
             {
                 string path = prefabsWithLabel[i];
-                ChangedPrefabs.Instance[i] = (path, File.ReadAllText(path));
+                ChangedPrefabs.Instance[i] = (AssetDatabase.AssetPathToGUID(path), File.ReadAllText(path));
                 StripFoldersFromPrefab(path, StripSettings.Build);
             }
 
@@ -106,7 +106,7 @@ private static void StripFoldersFromAllPrefabs()
                 string guid = prefabGUIDs[i];
                 string path = AssetDatabase.GUIDToAssetPath(guid);
 
-                ChangedPrefabs.Instance[i] = (path, File.ReadAllText(path));
+                ChangedPrefabs.Instance[i] = (guid, File.ReadAllText(path));
                 StripFoldersFromPrefab(path, StripSettings.PlayMode);
             }
 
@@ -141,8 +141,15 @@ private static void StripFoldersFromPrefab(string prefabPath, StrippingMode stri
 
         private static void RevertChanges()
         {
-            foreach ((string path, string content) in ChangedPrefabs.Instance)
+            foreach ((string guid, string content) in ChangedPrefabs.Instance)
             {
+                string path = AssetDatabase.GUIDToAssetPath(guid);
+
+                // The asset might have been deleted in Play Mode. Additionally, event if the asset is deleted,
+                // AssetDatabase might still hold a reference to it, so a File.Exists check is needed.
+                if (string.IsNullOrEmpty(path) || ! File.Exists(path))
+                    continue;
+
                 File.WriteAllText(path, content);
             }