1 files changed, 20 insertions, 0 deletions
diff --git a/jprov/overlay.py b/jprov/overlay.py
new file mode 100644
index 0000000..c2a04da
--- /dev/null
+++ b/jprov/overlay.py
@@ -0,0 +1,20 @@
+"""Overlay copy handling."""
+
+from __future__ import annotations
+
+import os
+import shutil
+
+
+def copy_overlay(src: str, dest_root: str) -> None:
+    if not src or not os.path.isdir(src):
+        return
+
+    for entry in os.listdir(src):
+        src_path = os.path.join(src, entry)
+        dest_path = os.path.join(dest_root, entry)
+        if os.path.isdir(src_path):
+            shutil.copytree(src_path, dest_path, symlinks=True, dirs_exist_ok=True)
+        else:
+            os.makedirs(os.path.dirname(dest_path), exist_ok=True)
+            shutil.copy2(src_path, dest_path, follow_symlinks=True)