1 files changed, 39 insertions, 0 deletions
diff --git a/debian/mailgraph.preinst b/debian/mailgraph.preinst
new file mode 100644
index 0000000..729ecc5
--- /dev/null
+++ b/debian/mailgraph.preinst
@@ -0,0 +1,39 @@
+#!/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 [ "$2" \< "1.13-1.1" ]; then
+            if [ -r /etc/default/mailgraph ]; then
+                . /usr/share/debconf/confmodule
+                . /etc/default/mailgraph
+                db_set mailgraph/start_on_boot "$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