1 files changed, 41 insertions, 0 deletions
diff --git a/debian/preinst b/debian/preinst
new file mode 100644
index 0000000..0070083
--- /dev/null
+++ b/debian/preinst
@@ -0,0 +1,41 @@
+#!/bin/sh
+
+set -e
+
+# summary of how this script can be called:
+#        * <new-preinst> `install'
+#        * <new-preinst> `install' <old-version>
+#        * <new-preinst> `upgrade' <old-version>
+#        * <old-preinst> `abort-upgrade' <new-version>
+
+
+case "$1" in
+    upgrade)
+    	if [ "$2" \< "1.13-1.1" ]; then
+        if [ -f /etc/default/mailgraph ]; then
+        	. /usr/share/debconf/confmodule
+          . /etc/default/mailgraph
+          db_set mailgraph/start_on_boot "$BOOT_START"
+          db_set mailgraph/mail_log "$MAIL_LOG"
+          db_set mailgraph/ignore_localhost "$IGNORE_LOCALHOST"
+        fi
+    	fi
+    ;;
+
+    install|abort-upgrade)
+    ;;
+
+    *)
+        echo "preinst called with unknown argument \`$1'" >&2
+        exit 1
+    ;;
+esac
+
+# dh_installdeb will replace this with shell code automatically
+# generated by other debhelper scripts.
+
+#DEBHELPER#
+
+exit 0
+
+