saving uncommitted changes in /etc prior to emerge run

paludis/hooks/sync_all_post/sync_herds_xml.bash

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+source "${PALUDIS_EBUILD_DIR}/echo_functions.bash"
+
+PORTDIR="/usr/portage"
+
+[[ -z ${PORTDIR} || "$(dirname ${PORTDIR})" == "/" ]] && die "PORTDIR empty or pointing to root!"
+
+
+die() {
+	eerror "${1}"
+	exit 1
+}
+
+cd "${PORTDIR}"/metadata || die "could not cd into '${PORTDIR}/metadata'!"
+[[ -e "${PORTDIR}"/metadata/herds.xml ]] && { rm "${PORTDIR}"/metadata/herds.xml || die "failed to rm herds.xml!" ;}
+wget https://gitweb.gentoo.org/proj/api.git/plain/files/packages/herds.xml || die "failed to wget herds.xml"