From d2ea3d0e3c69c7ccf5bb7a79963dc4aaadb97cf1 Mon Sep 17 00:00:00 2001
From: romeo-golf <romeo-golf@users.noreply.github.com>
Date: Sat, 14 Jan 2017 05:03:06 +0000
Subject: [PATCH] Only call AptUpdate if last update was more than  seconds
 ago, currently set to 1800

---
 bash/init.sh | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/bash/init.sh b/bash/init.sh
index 8d20631..5b5cb2d 100755
--- a/bash/init.sh
+++ b/bash/init.sh
@@ -177,7 +177,15 @@ function UpdateOperatingSystem() {
 
 ## Update the repository packages and check that prerequisite packages are installed.
 
-AptUpdate
+# Only call AptUpdate if last update was more than $APT_UPDATE_THRESHOLD seconds ago.
+APT_UPDATE_THRESHOLD="1800"
+APT_UPDATE_CURRENT_EPOCH=`date +%s`
+APT_UPDATE_LAST_EPOCH=`stat -c %Y /var/cache/apt/pkgcache.bin`
+APT_UPDATE_DELTA=`echo $[${APT_UPDATE_CURRENT_EPOCH} - ${APT_UPDATE_LAST_EPOCH}]`
+if [[ "${APT_UPDATE_DELTA}" -gt "${APT_UPDATE_THRESHOLD}" ]] ; then
+    AptUpdate
+fi
+
 CheckPrerequisites
 
 ## DISPLAY WELCOME SCREEN