From 6a3a2c168191ec411b938cc271535e692003dc2c Mon Sep 17 00:00:00 2001
From: Valentin Vidic <vvidic@carnet.hr>
Date: Fri, 7 Mar 2008 13:41:30 +0100
Subject: [PATCH] Preserve dovecot mailbox config over upgrade.

---
 src/actions/main.queue |    1 +
 src/functions.sh       |   45 ++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/src/actions/main.queue b/src/actions/main.queue
index 816024d..e2fe134 100644
--- a/src/actions/main.queue
+++ b/src/actions/main.queue
@@ -25,6 +25,7 @@ true				restore_configs
 # konacno, instalacija novih paketa
 pkg amavisd-cn			upgrade_amavis
 pkg apache-cn			upgrade_apache
+pkg dovecot-cn			upgrade_dovecot
 pkg postfix-cn			pkgadd postfix-cn
 pkg postgrey			pkgrm postgrey		# problematican
 pkg openldap-aai		upgrade_openldap
diff --git a/src/functions.sh b/src/functions.sh
index f68c54b..7b9eae4 100644
--- a/src/functions.sh
+++ b/src/functions.sh
@@ -487,7 +487,6 @@ restore_config () {
 restore_configs () {
   pkg base-files lt 4 && restore_config /etc/issue /etc/issue.net
   pkg bind9 lt 1:9.3.4 && restore_config /etc/bind/named.conf.options
-  pkg dovecot-common lt 1.0 && restore_config /etc/dovecot/dovecot.conf
   pkg libpam-modules lt 0.79 && restore_config /etc/security/limits.conf
   pkg login lt 1:4.0.18.1 && restore_config /etc/pam.d/login
   pkg mysql-server lt 5.0.3 && restore_config /etc/init.d/mysql \
@@ -654,6 +653,50 @@ upgrade_openldap () {
   dpkg --configure -a # try postinst again
 }
 
+get_variable () {
+  name=$1
+  file=$2
+
+  if [ -f "$file" ]; then
+     val=$(sed -n "/^[[:space:]]*$name[[:space:]]*=/s/[[:space:]]*//gp" $file)
+     val=${val#*=}
+  fi
+
+  echo $val
+}
+
+# preserve mail location on upgrade
+upgrade_dovecot () {
+  local default_mail_env mail_location
+
+  # check if already upgraded
+  if ! pkg dovecot-common lt 1.0; then
+      return
+  fi
+
+  # save old mail location
+  default_mail_env=$(get_variable default_mail_env /etc/dovecot/dovecot.conf)
+
+  # silently upgrade package
+  restore_config /etc/dovecot/dovecot.conf
+  pkgadd dovecot-cn
+
+  # insert old mail location
+  mail_location=$(get_variable mail_location /etc/dovecot/dovecot.conf)
+  if [ "$default_mail_env" -a ! "$mail_location" ]; then
+      check_and_sed '^#mail_location[[:space:]]*=' \
+                   "s|#mail_location[[:space:]]*=.*|mail_location = $default_mail_env|" /etc/dovecot/dovecot.conf || return 0
+
+      if [ -x /etc/init.d/dovecot ]; then
+          if [ -x /usr/sbin/invoke-rc.d ]; then
+              /usr/sbin/invoke-rc.d dovecot restart
+          else
+              /etc/init.d/dovecot restart
+          fi
+      fi
+  fi
+}
+
 # fix /etc/dpkg/dpkg.cfg
 comment_force_overwrite () {
   if [ -f /etc/dpkg/dpkg.cfg ]; then
-- 
1.7.10.4