#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage:
		  langs
		  langs -h
	EOF
}

help() {
	cat <<-'EOF'


		Options:
		  -h, --help    show this message


		List the supported languages, including english, to STDOUT.

		This is done in the same way that po4a(1) does it: by listing
		the po/*.po files, and getting the name from it.


		Examples:

		  Just run it:

		    $ langs
		    en
		    pt
	EOF
}


for flag in "$@"; do
	case "$flag" in
		--)
			break
			;;
		--help)
			usage
			help
			exit
			;;
		*)
			;;
	esac
done

while getopts 'h' flag; do
	case "$flag" in
		h)
			usage
			help
			exit
			;;
		*)
			usage >&2
			exit 2
	esac
done
shift $((OPTIND - 1))


echo po/en.po po/*.po |
	tr ' ' '\n' |
	sed 's|^po/\(.*\)\.po$|\1|'