From f78936a278cae769ad8e47c91618d7b3ae01b1fa Mon Sep 17 00:00:00 2001
From: Dustin Kirkland <kirkland@canonical.com>
Date: Sat, 10 Jan 2009 12:57:06 -0600
Subject: [PATCH]   * bin/updates-available: add some rudimentary caching
 mechanism for updates,     will make screen launch *much* faster on <= Ubuntu
 8.10

---
 bin/updates-available | 18 +++++++++++++++++-
 debian/changelog      |  5 ++++-
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/bin/updates-available b/bin/updates-available
index 182df922..635a0219 100755
--- a/bin/updates-available
+++ b/bin/updates-available
@@ -11,22 +11,38 @@ print_updates() {
 }
 
 cache=/var/run/updates-available
+mycache=/var/tmp/updates-available-$USER
 u=
-# If global updates-available cache is present, use it.  Available as of jaunty.
+# If global updates-available cache is present, use it.
+# Only available in Jaunty+.
 if [ -r $cache ]; then
 	u=`grep -m 1 "^[0-9]" $cache | sed "s/\s.*$//"`
 	print_updates $u
 fi
 
+# If the user's updates-available cache is present, and less than an hour old,
+# use it.  (The "hour" part should be configurable)
+if [ -r $mycache -a -O $mycache ]; then
+	now=`date +%s`
+	timestamp=`stat -c "%Y" $mycache`
+	diff=`expr $now - $timestamp`
+	if [ $diff -lt 3600 ]; then
+		u=`grep -m 1 "^[0-9]" $mycache | sed "s/\s.*$//"`
+		print_updates $u
+	fi
+fi
+
 # If apt-check binary exists, use it
 if [ -x /usr/lib/update-notifier/apt-check ]; then
 	u=`/usr/lib/update-notifier/apt-check 2>&1 | tail -n 1 | sed "s/;.*$//"`
+	echo "$u" > $mycache
 	print_updates $u
 fi
 
 # If apt-get exists, use it
 if [ -x /usr/bin/apt-get ]; then
 	u=`/usr/bin/apt-get -s -o Debug::NoLocking=true upgrade | grep -c ^Inst`
+	echo "$u" > $mycache
 	print_updates $u
 fi
 
diff --git a/debian/changelog b/debian/changelog
index 686be3ce..a082720a 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,10 +1,13 @@
 screen-profiles (1.6) UNRELEASED; urgency=low
 
+  [ Dustin Kirkland ]
   * debian/install: no need to install the debian profile in ubuntu
   * debian/rules: clean up comments
   * profiles/ubuntu: zero-fill the hour component of the timestamp
+  * bin/updates-available: add some rudimentary caching mechanism for updates,
+    will make screen launch *much* faster on <= Ubuntu 8.10
 
- -- Dustin Kirkland <kirkland@ubuntu.com>  Sat, 10 Jan 2009 09:03:53 -0600
+ -- Dustin Kirkland <kirkland@ubuntu.com>  Sat, 10 Jan 2009 12:56:02 -0600
 
 screen-profiles (1.5-0ubuntu1) jaunty; urgency=low