From d86b79c54bca47211511fc18f3d626cf3b30fcb1 Mon Sep 17 00:00:00 2001
From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
Date: Mon, 2 Mar 2009 14:17:35 -0500
Subject: [PATCH] added a prerm script to explicitly fail if someone attempts
 to downgrade to anything before 0.23

---
 packaging/debian/monkeysphere.prerm | 36 +++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100755 packaging/debian/monkeysphere.prerm

diff --git a/packaging/debian/monkeysphere.prerm b/packaging/debian/monkeysphere.prerm
new file mode 100755
index 0000000..1a5135a
--- /dev/null
+++ b/packaging/debian/monkeysphere.prerm
@@ -0,0 +1,36 @@
+#!/bin/sh -e
+
+# prerm script for monkeysphere
+
+# the only thing we're doing here is making sure that the local
+# administrator is not trying to downgrade to a version below 0.23,
+# since there was such a major reorganization of system data during
+# the transition to 0.23.
+
+# Author: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
+# Copyright 2009
+
+set -e
+
+case "$1" in
+    upgrade)
+	if dpkg --compare-versions "$2" lt 0.23 ; then
+	    cat >&2 <<EOF
+
+Downgrading the monkeysphere to a version earlier than 0.23 can have
+BAD CONSEQUENCES, including potentially locking you out of the system.
+Downgrading in this fashion is NOT SUPPORTED.
+
+EOF
+
+	    exit 1
+	fi
+    ;;
+esac
+
+# dh_installdeb will replace this with shell code automatically
+# generated by other debhelper scripts.
+
+#DEBHELPER#
+
+exit 0
-- 
2.25.1