bash: split args & opts

gistfile1.sh

#!/usr/bin/env bash

function a {
	echo "let's do A!"
}

function b {
	echo "Let's do B!"
}


declare -A OPT
declare -a ARG

for i in $@; do
	if [ "${i:0:2}" == "--" ]; then
		name=$(echo $i | sed 's/^-\+//g' | awk 'BEGIN { FS="=" } ; {print $1}' )
		value=$(echo $i | awk 'BEGIN { FS="=" } ; {print $2}');
		if [ "$value" == "" ]; then
			value="1"
		fi
		OPT[$name]=$value
	else
		ARG[${#ARG[*]}]="$i"
	fi;
done;

for i in  ${ARG[@]}; do
	if [[ $(type -t "$i" 2>/dev/null) == "function" ]]; then
		$i;
	else
		echo "Invalid command $i" >&2
	fi
done