NBash

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#!/usr/bin/env bash
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PATH="..:$PATH"
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# Load argsparse library.
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. argsparse.sh
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# Miscellaneous other functions. See below.
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argsparse_use_option option1 "An option" value exclude:option2
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argsparse_use_option option2 "Another option"
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# 
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printf -v argsparse_usage_description "%s\n" \
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	"A tutorial script to show other misc argsparse features." \
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	"Try command lines such as:" \
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	" $0" \
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	" $0 -h" \
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	" $0 --option1 123a" \
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	" $0 --option2"
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# You can define your own usage function
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usage() {
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	printf "Beginning of usage\n"
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	# Unless you want it to be completely removed, you can still call
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	# argsparse_usage function to also have auto-generated argsparse
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	# usage message.
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	argsparse_usage
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	printf "End of usage\n"
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	# And perform your own exit.
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	exit 16
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}
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# Allow empty command line
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argsparse_allow_no_argument yes
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# Command line parsing is done here.
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argsparse_parse_options "$@"
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if [[ $# -eq 0 ]]
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then
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	cat <<'information'
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Though this script has been called without any parameter, `usage' has
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not been triggered, due to the "argsparse_allow_no_argument yes"
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executed a few lines above in the script.
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To obtain the usage message, explicitly add --help on the command line.
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information
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fi
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# The argsparse_has_option_property function returns with 0 if a named
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# option has a named property. If the property has a value, it is
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# printed to standard input. So you can do things like that:
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if exclusion=$(argsparse_has_option_property option1 exclude)
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then
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	printf "The option %s excludes these other options: %s\n" \
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		option1 "$exclusion"
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fi
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for option in option1 option2
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do
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	if argsparse_has_option_property "$option" value
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	then
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		printf "%s has the value property.\n" "$option"
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	else
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		printf "%s does not have the value property.\n" "$option"
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	fi
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done
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printf "\nOptions reporting:\n"
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# Simple reporting function.
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argsparse_report
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printf "End of argsparse report.\n\n"
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