#bash #boilerplate

index.sh

#!/bin/bash

# https://explainshell.com/explain?cmd=set+-euxo%20pipefail
set -eou pipefail

yell() { echo "$0: $*" >&2; }
die() { yell "$*"; exit 111; }
try() { echo "$ $@" 1>&2; "$@" || die "cannot $*"; }
# log to syslog and echo output
info() {
	echo -e "\n$1"
	logger -t ProgramName "$1"
}

main() {
	# do stuff here
	info "ok"
}
function_one() {
	echo "hello ${1:-}"
	# usage: ./script.sh function_one world
	# return hello world!
}

function_two() {
	echo "hello ${1:-}"
	# usage: ./script.sh function_one world
	# return hello world!
}
display_help() {
	echo "Usage: $0 [arguments...]"
	echo
	echo "  -h | --help	 					Display this help info"
	echo "    function_one 					Parameter one function_one"
	echo "    function_two 					Parameter one function_two"
	echo
	exit 1
}
case "${1:-""}" in
	# usage: ./script.sh function_one args
	function_one)
		function_one ${2:-}
		exit 0
	;;
	# usage: ./script.sh function_one args
	function_two)
		function_two ${2:-}
		exit 0
	;;

	-h | --help)
		display_help
	;;

	#usage: ./script.sh arg1 arg2 arg3
	*)
		main $@

esac