From 6f4501ca21368992cb3bc1d1027d78b123d7129e 2021-09-20 22:13:44
From: Mithil Poojary <mithil467@gmail.com>
Date: 2021-09-20 22:13:44
Subject: [PATCH] Restore cygwin path check

---

diff --git a/IPython/core/interactiveshell.py b/IPython/core/interactiveshell.py
index 05bd8ee..d3389a8 100644
--- a/IPython/core/interactiveshell.py
+++ b/IPython/core/interactiveshell.py
@@ -921,7 +921,11 @@ class InteractiveShell(SingletonConfigurable):
         while p.is_symlink():
             p = Path(os.readlink(p))
             paths.append(p.resolve())
-
+        
+        # In Cygwin paths like "c:\..." and '\cygdrive\c\...' are possible
+        if str(p_venv).startswith("\\cygdrive"):
+            p_venv = "C:" / Path(str(p_venv)[11:])
+        
         if any(p_venv == p.parents[1] for p in paths):
             # Our exe is inside or has access to the virtualenv, don't need to do anything.
             return