route

#!/usr/bin/env bash

set -Eeuo pipefail; shopt -s nullglob; [[ -z ${TRACE:-} ]] || set -x; unset CDPATH; IFS=$' \t\n'

cd "$(dirname "$(readlink -f "$0")")"/../.. || exit

# shellcheck disable=2034
declare -gr PROGNAME=${0##*/} # Program name

cry() {
	echo "$*" >&2
}

die() {
	echo "$*" >&2
	exit 1
}

is_valid() {
	local dir=${1?${FUNCNAME[0]}: missing argument}; shift

	[[ -d $dir/.local/bin ]]
}

is_valid-() {
	is_valid "$*" || die "Directory not valid: $*"
}

single() {
	local dir=${1?${FUNCNAME[0]}: missing argument}; shift

	is_valid- "$dir"

	local exe=.local/bin/$route; (
		cd "$dir" || exit

		[[ -x $exe ]] || die "No executable found for $dir: $route"

		cry "--> $dir $route $*"

		exec "$exe" "$@"
	)
}

all() {
	local dir

	for dir in *; do
		is_valid "$dir" || continue

		single "$dir"
	done
}

main() {
	[[ $# -gt 0 ]] || die "Usage: $PROGNAME <route> [<directory> [args...]]"

	declare -gr route=$1
	shift

	if [[ $# -gt 0 ]]; then
		single "$@"
	else
		all
	fi
}

main "$@"