Extended buildSave to create a temp file and migrate that file to the live accessed file to prevent read/write race conditionns between threads

core/runtime/savedata.py

@@ -1,5 +1,7 @@
 import json
 import sqlite3
+import tempfile
+import os
 
 def buildSave(action, outputs):
     if hasattr(action, "savedata"):
@@ -8,11 +10,34 @@ def buildSave(action, outputs):
         for save_name in action.savedata:
             save_data[save_name] = outputs[save_name]
 
-            with open(f"{action.savepath}", "w") as save_file:
-                json.dump(save_data, save_file)
+            #ith open(f"{action.savepath}", "w") as save_file:
+            #    json.dump(save_data, save_file)
 
-        #print(f"Data saved by {action.name} to {action.savepath}")
-    return outputs
+        temporary_path = None
+
+        #directory = os.path.dirname(os.path.abspath(path))
+        directory = os.environ.get("TEMP_DIR")
+        try:
+            with tempfile.NamedTemporaryFile(
+                mode="w",
+                #dir=directory,
+                dir=directory,
+                delete=False
+            ) as file:
+                json.dump(save_data, file)
+                temporary_path = file.name
+
+            os.replace(temporary_path, action.savepath)
+
+        finally:
+            if temporary_path:
+                try:
+                    os.remove(temporary_path)
+                except FileNotFoundError:
+                    pass
+
+            #print(f"Data saved by {action.name} to {action.savepath}")
+        return outputs
 
 def loadSave(action, outputs):
     if hasattr(action, "loaddata"):