output of which

gistfile1.txt

-antigen-parse-args () {
	local spec="$1" 
	shift
	spec="$(echo "$spec" | tr '\n' ' ' | sed 's/[[:space:]]//g')" 
	local code='' 
	--add-var () {
		test -z "$code" || code="$code\n" 
		code="${code}local $1='$2'" 
	}
	local positional_args="$(echo "$spec" | cut -d\; -f1)" 
	local positional_args_count="$(echo $positional_args |
            awk -F, '{print NF}')" 
	local i=1 
	while [[ -n $1 && $1 != --* ]]
	do
		if (( $i > $positional_args_count ))
		then
			echo "Only $positional_args_count positional arguments allowed." >&2
			echo "Found at least one more: '$1'" >&2
			return
		fi
		local name_spec="$(echo "$positional_args" | cut -d, -f$i)" 
		local name="${${name_spec%\?}%:}" 
		local value="$1" 
		if echo "$code" | grep -l "^local $name=" &> /dev/null
		then
			echo "Argument '$name' repeated with the value '$value'". >&2
			return
		fi
		--add-var $name "$value"
		shift
		i=$(($i + 1)) 
	done
	local keyword_args="$(
            # Positional arguments can double up as keyword arguments too.
            echo "$positional_args" | tr , '\n' |
                while read line; do
                    if [[ $line == *\? ]]; then
                        echo "${line%?}:?"
                    else
                        echo "$line:"
                    fi
                done

            # Specified keyword arguments.
            echo "$spec" | cut -d\; -f2 | tr , '\n'
            )" 
	local keyword_args_count="$(echo $keyword_args | awk -F, '{print NF}')" 
	while [[ $1 == --* ]]
	do
		local arg="${1#--}" 
		if [[ $arg != *=* ]]
		then
			local name="$arg" 
			local value='' 
		else
			local name="${arg%\=*}" 
			local value="${arg#*=}" 
		fi
		if echo "$code" | grep -l "^local $name=" &> /dev/null
		then
			echo "Argument '$name' repeated with the value '$value'". >&2
			return
		fi
		local arg_line="$(echo "$keyword_args" |
                            egrep "^$name:?\??" | head -n1)" 
		if [[ -z $arg_line ]]
		then
			echo "Unknown argument '$name'." >&2
			return
		elif (
				echo "$arg_line" | grep -l ':' &> /dev/null
			) && [[ -z $value ]]
		then
			echo "Required argument for '$name' not provided." >&2
			return
		elif (
				echo "$arg_line" | grep -vl ':' &> /dev/null
			) && [[ -n $value ]]
		then
			echo "No argument required for '$name', but provided '$value'." >&2
			return
		fi
		if [[ -z $value ]]
		then
			value=true 
		fi
		--add-var "${name//-/_}" "$value"
		shift
	done
	echo "$code"
	unfunction -- --add-var
}