From b2a536c41d713e0e03be60abe1e61b925a295c52 Mon Sep 17 00:00:00 2001
From: David Brochart <david.brochart@gmail.com>
Date: Wed, 1 Mar 2023 23:40:39 +0100
Subject: [PATCH] Dependency chain paths

---
 src/in_n_out/_store.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/in_n_out/_store.py b/src/in_n_out/_store.py
index 3915bd1..e115ec9 100644
--- a/src/in_n_out/_store.py
+++ b/src/in_n_out/_store.py
@@ -802,7 +802,16 @@ def _exec(*args: P.args, **kwargs: P.kwargs) -> R:
                     _injected_names,
                 )
                 try:
+                    path = []
+                    for k, v in bound.arguments.items():
+                        if hasattr(v, "_path"):
+                            v._path.append(k)
+                            v._path.insert(0, path)
+                        else:
+                            v._path = [path, k]
                     result = func(**bound.arguments)
+                    if result is not None:
+                        result._path = path
                 except TypeError as e:
                     if "missing" not in e.args[0]:
                         raise  # pragma: no cover