# find next entry in PATH for wrapper scripts
# Usage: next-in-path <program name> <current $0>
typeset -U path
next-in-path() {
	local entries=( $(which -a $1) )
	local index=${entries[(ie)$2]}
	local result
	if [[ $index -le ${#entries} ]]; then
		# found $0, use next entry
		result=$entries[$((index + 1))]
	else
		result=$entries[1]
	fi

	if [[ -n $result ]]; then
		echo $result
	else
		return 1
	fi
}