From 00dc02427153cf046ae072f1f6dee4dab2e643fd Mon Sep 17 00:00:00 2001
From: Thomas Leonard <talex5@gmail.com>
Date: Sat, 29 May 2010 21:21:56 +0100
Subject: [PATCH] Discard stderr from "dpkg-query -W"

Avoids "No packages found matching" warning message.
---
 zeroinstall/injector/distro.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/zeroinstall/injector/distro.py b/zeroinstall/injector/distro.py
index 20ab984..e6f92fd 100644
--- a/zeroinstall/injector/distro.py
+++ b/zeroinstall/injector/distro.py
@@ -277,8 +277,10 @@ class DebianDistribution(Distribution):
 		self.apt_cache = Cache('apt-cache-cache', pkgcache, 3)
 
 	def _query_installed_package(self, package):
+		null = os.open('/dev/null', os.O_WRONLY)
 		child = subprocess.Popen(["dpkg-query", "-W", "--showformat=${Version}\t${Architecture}\t${Status}\n", "--", package],
-						stdout = subprocess.PIPE)
+						stdout = subprocess.PIPE, stderr = null)
+		os.close(null)
 		stdout, stderr = child.communicate()
 		child.wait()
 		for line in stdout.split('\n'):
-- 
2.11.4.GIT