saving uncommitted changes in /etc prior to emerge run

paludis/hooks/sync_all_post/sync_cache.bash

@@ -3,23 +3,13 @@
 source "${PALUDIS_EBUILD_DIR}/echo_functions.bash"
 source "/etc/paludis/hooks/set_portdir.bash"
 
+# you may change this to only update cache of specific overlays
 overlay_list=(
-	arx-libertatis
-	desktop-overlay
-	dotnet
-	games-overlay
-	haskell
-	hasufell-overlay
-	libressl
-	media-overlay
-	prism-overlay
-	qt
-	torbrowser
-	tox-overlay
+	$(${CAVE} print-repositories | grep -vE '(^gentoo$|^installed$|^installed-unpackaged$|^layman$|^paludis-overlay$|^repository$)')
 )
 
 ebegin "Syncing metadata cache for gentoo repository"
-#rsync -avPq rsync://rsync.gentoo.org/gentoo-portage/metadata/md5-cache/ "${PORTDIR}"/metadata/md5-cache/
+rsync -avPq rsync://rsync.gentoo.org/gentoo-portage/metadata/md5-cache/ "${PORTDIR}"/metadata/md5-cache/
 egencache --jobs=$(nproc) --repo=gentoo --update --update-use-local-desc
 eend $?