question/help - how to parse to display help (-h) message if there is zero option

[geneliu]

subcmd.sh works all nice. I wonder if there is a way to let the command to display the help message if no option is provided.

... code from examples/subcmds.sh

eval "$(getoptions parser_definition parse "$0") exit 1"
parse "$@"
eval "set -- $REST"

if [ $# -gt 0 ]; then
	cmd=$1
	shift
	case $cmd in
		cmd1)
			eval "$(getoptions parser_definition_cmd1 parse "$0")"
			parse "$@"
			eval "set -- $REST"
			echo "FLAG_A: $FLAG_A"
			;;
		cmd2)
			eval "$(getoptions parser_definition_cmd2 parse "$0")"
			parse "$@"
			eval "set -- $REST"
			echo "FLAG_B: $FLAG_B"
			;;
		cmd3)
			eval "$(getoptions parser_definition_cmd3 parse "$0")"
			parse "$@"
			eval "set -- $REST"
			echo "FLAG_C: $FLAG_C"
			;;
		--) # no subcommand, arguments only
	esac
else
    echo "here!"
    ## How to let the command to display the help message here the same as --help option??
    eval "$(getoptions parser_definition parse "$0" "-h")"
fi
echo "GLOBAL: $GLOBAL"
i=0
while [ $# -gt 0 ] && i=$((i + 1)); do
	echo "$i: $1"
	shift
done

[ko1nksm]

Simply call the usage function.

...
else
    echo "here!"
    ## How to let the command to display the help message here the same as --help option??
    usage
fi
...

parser_definition() {
        setup   REST help:usage abbr:true -- \
                "Usage: ${2##*/} [global options...] [command] [options...] [arguments...]"
...

The help:usagedefines a function named usage.

[geneliu]

cool. thanks!