saving uncommitted changes in /etc prior to emerge run

paludis/hooks/set_portdir.bash

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# set PORTDIR
+
+PORTDIR="$(cave print-repository-metadata --raw-name location gentoo)"
+PORTDIR="${PORTDIR#location=}"
+
+if [[ -z ${PORTDIR} || "$(dirname ${PORTDIR})" == "/" ]] ; then
+	die "PORTDIR empty or pointing to root!"
+elif [[ ! -e ${PORTDIR} ]] ; then
+	die "${PORTDIR} does not exist!"
+fi