added conversion to subvolume...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

Archive/snapshot.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/bash
+
+# XXX need:
+# 	- protocol to restore stuff -- simply copy???
+# 	- protocol to fully delete something -- i.e. delete snapshots???
+# 	- a way to list deleted files
+# 	- a way to list available file versions
+# 	- a way to restore specicifc file(s)
+# 	- a way to maintain a set number of snapshots...
+#
+
+# check if on btrfs filesystem...
+# XXX also check if btrfs command is available...
+if ! btrfs filesystem usage . > /dev/null ; then
+	exit
+fi
+
+
+# create ./media...
+if ! [ -e ./media ] ; then
+	btrfs subvolume create ./media
+	# XXX build tree -- ImageGrid
+
+# convert ./media to a subvolume...
+elif [ "$(stat --format=%i ./media)" == 256 ] ; then
+	btrfs subvolume create ./media_subvolume
+	#mv ./media/{,.}* ./media_subvolume/
+	cp --archive --one-file-system --reflink=always \
+		./media/{,.}* \
+		./media_subvolume/
+	mv ./media{,.bak}
+	mv ./media{_subvolume,}
+fi
+mkdir -p ./.snapshots
+
+
+# XXX should this be more human readable???
+# 	...a date + number maybe???
+SNAPSHOT=$(( 
+	$( ls .snapshots \
+		| sort -n \
+		| tail -n 1 ) \
+	+ 1 ))
+
+btrfs subvolume snapshot -r ./media .snapshots/${SNAPSHOT}
+