Disable system site-packages via GENTOO_CPYTHON_BUILD var

Do not add system site-packages directory to sys.path if GENTOO_CPYTHON_BUILD variable is set. This solves multiple issues while building and testing CPython, particularly test suite issues from installed .pth files, Python modules (particularly docutils) and sandbox violations from attempting to write byte-compiled modules back. Signed-off-by: Michał Górny <[email protected]>
gentoo · Aug 1, 2024 · 07cf9fc · 07cf9fc
1 parent 6cb2c9c
commit 07cf9fc
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/Lib/site.py b/Lib/site.py
@@ -415,6 +415,7 @@ def getsitepackages(prefixes=None):
 
 def addsitepackages(known_paths, prefixes=None):
     """Add site-packages to sys.path"""
+    if os.environ.get("GENTOO_CPYTHON_BUILD") and prefixes is None: return known_paths
     _trace("Processing global site-packages")
     for sitedir in getsitepackages(prefixes):
         if os.path.isdir(sitedir):