## Parse options
-subcmd="$1"; shift
-[ "$subcmd" = "add" ] || die "unknown subcommand ($subcmd)"
+subcmd="$1"; shift || :
+case "$subcmd" in
+ -h|"")
+ echo "Usage: tg [...] depend add NAME" >&2
+ exit 1;;
+ add)
+ ;;
+ *)
+ die "unknown subcommand ($subcmd)";;
+esac
while [ -n "$1" ]; do
arg="$1"; shift