From 7cb02e025b6b24c42e1aa23e84bb0d9b4097e716 Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@robotics.uk.to>
Date: Sun, 21 Sep 2014 11:54:23 +0100
Subject: [PATCH] Avoid duplicated entries in sources.list

---
 install-freedombone.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/install-freedombone.sh b/install-freedombone.sh
index 02e82e9d..b3f70965 100755
--- a/install-freedombone.sh
+++ b/install-freedombone.sh
@@ -76,7 +76,9 @@ function enable_backports {
   if grep -Fxq "enable_backports" $COMPLETION_FILE; then
 	  return
   fi
-  echo "deb http://ftp.us.debian.org/debian jessie-backports main" >> /etc/apt/sources.list
+  if ! grep -Fxq "deb http://ftp.us.debian.org/debian jessie-backports main" /etc/apt/sources.list; then
+    echo "deb http://ftp.us.debian.org/debian jessie-backports main" >> /etc/apt/sources.list
+  fi
   echo 'enable_backports' >> $COMPLETION_FILE
 }