From 50191049f5c1d7b823bc4a018e989bdd6596d0ed Mon Sep 17 00:00:00 2001
From: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Date: Fri, 5 Sep 2008 17:03:54 +0200
Subject: [PATCH] Require latest carnet-upgrade version.

---
 debian/control         |    2 +-
 src/actions/main.queue |    1 +
 src/cn-upgrade         |    4 ++--
 src/data.sh            |    3 +++
 src/functions.sh       |   25 ++++++++++++++++++++++++-
 5 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/debian/control b/debian/control
index 213a4c9..fec2101 100644
--- a/debian/control
+++ b/debian/control
@@ -7,7 +7,7 @@ Standards-Version: 3.7.3
 
 Package: carnet-upgrade
 Architecture: all
-Depends: dialog, ${misc:Depends}
+Depends: dialog, wget, ${misc:Depends}
 Description: CARNet distribution upgrade script
  This package provides cn-upgrade, a helper script
  to facilitate upgrades between different versions
diff --git a/src/actions/main.queue b/src/actions/main.queue
index 0335654..d7b116f 100644
--- a/src/actions/main.queue
+++ b/src/actions/main.queue
@@ -1,5 +1,6 @@
 # Full upgrade
 true				first_warning
+true				check_my_version
 true				check_apache_version
 true				check_upgrade
 true				check_grsec_kernel
diff --git a/src/cn-upgrade b/src/cn-upgrade
index fa46875..778b6ba 100755
--- a/src/cn-upgrade
+++ b/src/cn-upgrade
@@ -2,7 +2,7 @@
 # last update: 2005-01-07
 # Zoran 'jelly' Dzelajlija <jelly@srce.hr>
 # Ivan 'ico' Rako <irako@srce.hr>
-version="carnet-upgrade v4.0.6"
+version="4.0.6"
 
 # restart upgrade under script for logging purposes
 if [ "$1" == "--no-script" ]; then
@@ -29,7 +29,7 @@ cnup="/usr/share/carnet-upgrade"
 . ${ROOT}${cnup}/messages.sh
 . ${ROOT}${cnup}/functions.sh
 
-log "$version starting"
+log "carnet-upgrade v$version starting"
 
 main_queuetab="${cnup}/actions/main.queue"
 post_upgrade_queuetab="/var/lib/carnet-upgrade/post_upgrade.queue"
diff --git a/src/data.sh b/src/data.sh
index bbb0b6c..0e8b735 100644
--- a/src/data.sh
+++ b/src/data.sh
@@ -30,6 +30,9 @@ webalizer-cn	2.01.10-1
 xinetd-cn	2:2.3.13-1
 '
 
+# URL to use for checking the latest version of carnet-upgrade itself
+packages_uri='ftp://ftp.carnet.hr/carnet-debian/dists/carnet-sarge/main/binary-all/Packages'
+
 # Packages to forcibly install before installing the rest with dist-upgrade,
 # because dist-upgrade would rather remove or keep them back them.
 packages_first='
diff --git a/src/functions.sh b/src/functions.sh
index 4512ee6..6f85840 100644
--- a/src/functions.sh
+++ b/src/functions.sh
@@ -303,7 +303,7 @@ what_upgrade () {
 # funkcija za ispis paketa koje treba upgradeati
 check_upgrade () {
   local upgrade
-  upgrade="`what_upgrade`"
+  upgrade=${1:-"`what_upgrade`"}
 
   if [ "$upgrade" ]; then
     notice "
@@ -323,6 +323,29 @@ Nakon toga ponovno pozovite ovu skriptu."
   fi
 }
 
+# try to check if we are using the latest version of carnet-upgrade script
+check_my_version () {
+  local packages latest_version
+
+  packages=$(mktemp /var/lib/carnet-upgrade/Packages.XXXXXX)
+  if wget -q -O$packages $packages_uri; then
+    latest_version=$(sed -ne \
+        '/Package: carnet-upgrade/,/Description:/{ /Version: /s///p }' \
+        $packages)
+    rm -f $packages
+
+    if [ "$latest_version" ]; then
+      log "Running carnet-upgrade version is $version"
+      log "Latest carnet-upgrade version is $latest_version"
+      if dpkg --compare-versions "$version" lt "$latest_version"; then
+        check_upgrade " carnet-upgrade"
+      else log "Already using the latest carnet-upgrade version."; fi
+    else log "Failed to get latest version, skipping check."; fi
+  else log "Failed to download Packages file, skipping check."; fi
+
+  rm -f $packages
+}
+
 # if apache is installed make sure it's version 2
 check_apache_version () {
 
-- 
1.7.10.4