Allow bypass of the patched prefix for troubleshooting #36.

jaraco · Nov 12, 2018 · 5aa7b62 · 5aa7b62
1 parent 5cd07ea
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diff --git a/CHANGES.rst b/CHANGES.rst
@@ -1,3 +1,9 @@
+5.2
+---
+
+#36: Allow bypass of workaround for pip #4106
+by setting ``PIP_RUN_NO_PATCH_PREFIX``.
+
 5.1
 ---
 

diff --git a/pip_run/deps.py b/pip_run/deps.py
@@ -85,6 +85,9 @@ def _patch_prefix():
 	To workaround pypa/pip#4106, override the system prefix with
 	a user prefix, restoring the original file after.
 	"""
+	if os.environ.get('PIP_RUN_NO_PATCH_PREFIX'):
+		yield
+		return
 	cfg_fn = os.path.expanduser('~/.pydistutils.cfg')
 	with _save_file(cfg_fn):
 		with open(cfg_fn, 'w') as cfg: