Save and reuse UUIDs between project generations.

SConscript

@@ -483,8 +483,26 @@ def _generate_project(project_type: str) -> None:
     }.get(project_type, (None, None))
     if not source_folder:
         _error(None, 'Invalid project type option.')
-    def _generate_uuid() -> str:
-        return str(uuid.uuid4())
+
+    uuid_cache_file = pathlib.Path(env['SHARED_CACHE_DIR'], 'uuids.json')
+    uuid_cache = {}
+    save_uuid_cache = False
+    if uuid_cache_file.exists():
+        try:
+            with uuid_cache_file.open('r') as f:
+                uuid_cache = json.load(f)
+        except Exception as e:
+            print(f'Error loading UUID cache: {e}')
+
+    def _generate_uuid(name: str = '') -> str:
+        nonlocal save_uuid_cache
+        if name and name in uuid_cache:
+            return uuid_cache[name]
+        new_uuid = str(uuid.uuid4())
+        if name:
+            uuid_cache[name] = new_uuid
+            save_uuid_cache = True
+        return new_uuid
     
     root_path = pathlib.Path(env.Dir('#').abspath)
     def _get_executables() -> list:
@@ -526,6 +544,14 @@ def _generate_project(project_type: str) -> None:
             with target_file.open('w') as f:
                 f.write(templ.render())
 
+    if save_uuid_cache:
+        try:
+            with uuid_cache_file.open('w') as f:
+                json.dump(uuid_cache, f)
+        except Exception as e:
+            print(f'Error writing uuid cache: {e}')
+
+
 
 Import('config')