+
+APPLY=false
+
+usage () {
+ [ "$1" = 0 ] || exec >&2
+ echo "Usage: $0 [--apply] [--keep-old] [--prefix PREFIX] SOURCE"
+ exit "$1"
+}
+
+die_getopt () {
+ echo "getopt failed" >&2
+ exit 1
+}
+
+parse_opts () {
+ eval set -- "$(getopt -o '' -l apply,keep-old,prefix:,help -- "$@")"
+ while :; do
+ case $1 in
+ --apply)
+ APPLY=:
+ shift
+ ;;
+ --keep-old)
+ shift
+ ;;
+ --prefix)
+ shift 2
+ ;;
+ --help)
+ usage 0
+ shift
+ ;;
+ --) shift; break ;;
+ *) die_getopt ;;
+ esac
+ done
+}
+
+[ "$1" ] || usage 1
+
+parse_opts "$@"
+
+if $APPLY; then