From 93eecae0c338ba923347b647e0b7713081f61b64 Mon Sep 17 00:00:00 2001
From: Michael Kuhn <michael.kuhn@ovgu.de>
Date: Thu, 17 Nov 2022 09:17:41 +0100
Subject: Add sgid notice when running on AFS (#30247)

---
 lib/spack/spack/package_prefs.py | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'lib')

diff --git a/lib/spack/spack/package_prefs.py b/lib/spack/spack/package_prefs.py
index 79beaba492..c52642516c 100644
--- a/lib/spack/spack/package_prefs.py
+++ b/lib/spack/spack/package_prefs.py
@@ -3,6 +3,7 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 import stat
+import warnings
 
 import spack.error
 import spack.repo
@@ -221,6 +222,12 @@ def get_package_dir_permissions(spec):
     perms = get_package_permissions(spec)
     if perms & stat.S_IRWXG and spack.config.get("config:allow_sgid", True):
         perms |= stat.S_ISGID
+        if spec.concrete and "/afs/" in spec.prefix:
+            warnings.warn(
+                "Directory {0} seems to be located on AFS. If you"
+                " encounter errors, try disabling the allow_sgid option"
+                " using: spack config add 'config:allow_sgid:false'".format(spec.prefix)
+            )
     return perms
 
 
-- 
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