From: whitequark <cz@m-labs.hk>
Date: Sat, 6 Jul 2019 18:44:25 +0000 (+0000)
Subject: build.run: make sure BuildProducts._root is not easily accessible.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2b1fb525cb92e933b788e9955358a76d2c87f95f;p=nmigen.git

build.run: make sure BuildProducts._root is not easily accessible.
---

diff --git a/nmigen/build/run.py b/nmigen/build/run.py
index 251ba3e..204e98d 100644
--- a/nmigen/build/run.py
+++ b/nmigen/build/run.py
@@ -56,11 +56,13 @@ class BuildPlan:
 
 class BuildProducts:
     def __init__(self, root):
-        self._root = root
+        # We provide no guarantees that files will be available on the local filesystem (i.e. in
+        # any way other than through `products.get()`), so downstream code must never rely on this.
+        self.__root = root
 
     def get(self, filename, mode="b"):
         assert mode in "bt"
-        with open(os.path.join(self._root, filename), "r" + mode) as f:
+        with open(os.path.join(self.__root, filename), "r" + mode) as f:
             return f.read()
 
     @contextmanager