1 files changed, 35 insertions, 0 deletions
diff --git a/debian/exim4-base.preinst b/debian/exim4-base.preinst
new file mode 100644
index 0000000..6b21759
--- /dev/null
+++ b/debian/exim4-base.preinst
@@ -0,0 +1,35 @@
+#! /bin/sh
+
+set -e
+
+
+# Remove a no-longer used conffile
+rm_conffile() {
+    local PKGNAME="$1"
+    local CONFFILE="$2"
+
+    [ -e "$CONFFILE" ] || return 0
+
+    local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
+    local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PKGNAME | \
+            sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
+    if [ "$md5sum" != "$old_md5sum" ]; then
+        echo "Obsolete conffile $CONFFILE has been modified by you."
+        echo "Saving as $CONFFILE.dpkg-bak ..."
+        mv -f "$CONFFILE" "$CONFFILE".dpkg-bak
+    else
+        echo "Removing obsolete conffile $CONFFILE ..."
+        rm -f "$CONFFILE"
+    fi
+}
+
+case "$1" in
+install|upgrade)
+    # Remove post-wheezy
+    if test -e /etc/cron.monthly/exim4-base && \
+	    dpkg --compare-versions "$2" le "4.80-7~"; then
+        rm_conffile mypackage "/etc/cron.monthly/exim4-base"
+    fi
+esac
+
+#DEBHELPER#