From: Daan De Meyer <daan.j.demeyer@gmail.com>
Date: Thu, 8 Sep 2022 08:17:58 +0000 (+0200)
Subject: Send stdout to devnull when checking nspawn known arg
X-Git-Tag: v14~42^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7cbc894af7ed02ed2e93c425a9713df25ac173b4;p=thirdparty%2Fmkosi.git

Send stdout to devnull when checking nspawn known arg

We only need stderr, let's send any output printed to stdout
to /dev/null
---

diff --git a/mkosi/backend.py b/mkosi/backend.py
index 41d3cbb6b..b1debc2d2 100644
--- a/mkosi/backend.py
+++ b/mkosi/backend.py
@@ -654,7 +654,8 @@ def var_tmp(root: Path) -> Path:
 
 
 def nspawn_knows_arg(arg: str) -> bool:
-    return "unrecognized option" not in run([nspawn_executable(), arg], stderr=subprocess.PIPE, check=False, text=True).stderr
+    return "unrecognized option" not in run([nspawn_executable(), arg], stdout=subprocess.DEVNULL,
+                                            stderr=subprocess.PIPE, check=False, text=True).stderr
 
 
 def format_rlimit(rlimit: int) -> str: