fix: remove directory entry sizes from directory_size() to report accurate file totals (#9040)

* fix: remove dir entry sizes from directory_size() (Closes #9039)

* fix: replace unused 'dirs' variable with '_' to resolve ruff F841 linting error

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Co-authored-by: Lincoln Stein <lincoln.stein@gmail.com>
Co-authored-by: Alexander Eichhorn <alex@eichhorn.dev>

Author: 3 people

invokeai/backend/util/util.py

@@ -40,11 +40,9 @@ def directory_size(directory: Path) -> int:
     Return the aggregate size of all files in a directory (bytes).
     """
     sum = 0
-    for root, dirs, files in os.walk(directory):
+    for root, _, files in os.walk(directory):
         for f in files:
             sum += Path(root, f).stat().st_size
-        for d in dirs:
-            sum += Path(root, d).stat().st_size
     return sum