Establish MOUSE ports collection

tests/check-layout.sh

@@ -0,0 +1,33 @@
+#!/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