saving uncommitted changes in /etc prior to emerge run

paludis/hooks/sync_post/01-sync_gentoo_cache.bash

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+source "${PALUDIS_EBUILD_DIR}/echo_functions.bash"
+source "/etc/paludis/hooks/set_portdir.bash"
+
+if [[ ${TARGET} == gentoo ]] ; then
+	# Number of jobs for egencache, default is number or processors.
+	egencache_jobnum="$(nproc)"
+
+#	ebegin "Fetching pre-generated metadata cache for gentoo repository"
+#	rsync -aq rsync://rsync.gentoo.org/gentoo-portage/metadata/md5-cache/ "${PORTDIR}"/metadata/md5-cache/
+#	eend $?
+
+	ebegin "Cache update for repository ${TARGET}"
+	egencache --jobs=${egencache_jobnum} --repo=${TARGET} --update --update-use-local-desc
+	eend $?
+fi