#!/bin/sh
set -eu

root=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
found=0

for directory in "$root"/ports/*; do
	[ -d "$directory" ] || continue
	[ "${directory##*/}" != README.md ] || continue
	found=1
	name=${directory##*/}
	case "$name" in
		""|[!a-z]*|*[!a-z0-9-]*)
			printf '%s\n' "invalid port directory name: $name" >&2
			exit 1
			;;
	esac
	[ -f "$directory/port.conf" ] || {
		printf '%s\n' "missing recipe: ports/$name/port.conf" >&2
		exit 1
	}
	[ -x "$directory/build.sh" ] || {
		printf '%s\n' "missing executable build script: ports/$name/build.sh" >&2
		exit 1
	}
	sh -n "$directory/build.sh"
done

if [ "$found" -eq 0 ]; then
	printf '%s\n' "ports collection is empty"
else
	printf '%s\n' "ports layout check passed"
fi