+ timestamp=$(date "+%Y-%m-%d-%H:%M")
+ mkdir -p $queuedir/bts_version_track_archive/${timestamp}
+ rsync -aq $queuedir/bts_version_track/ $queuedir/bts_version_track_archive/${timestamp}
+ rmdir --ignore-fail-on-non-empty $queuedir/bts_version_track_archive/${timestamp} # remove if empty.