Add hash generator to build tools

Author: Michael Babker

build/hash_generator.php

@@ -0,0 +1,38 @@
+#!/usr/bin/env php
+<?php
+/**
+ * Script used to generate hashes for release packages
+ *
+ * Usage: php build/hash_generator.php
+ *
+ * @package     Joomla.Plugin
+ * @subpackage  Installer.webinstaller
+ *
+ * @copyright   Copyright (C) 2013 - 2018 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE
+ */
+
+$packageDir = __DIR__ . '/packages';
+
+$hashes = array();
+
+/** @var DirectoryIterator $file */
+foreach (new DirectoryIterator($packageDir) as $file)
+{
+	if ($file->isDir() || $file->isDot())
+	{
+		continue;
+	}
+
+	$hashes[$file->getFilename()] = array(
+		'sha256' => hash_file('sha256', $file->getPathname()),
+		'sha384' => hash_file('sha384', $file->getPathname()),
+		'sha512' => hash_file('sha512', $file->getPathname()),
+	);
+}
+
+$jsonOptions = PHP_VERSION_ID >= 50400 ? JSON_PRETTY_PRINT : 0;
+
+@file_put_contents($packageDir . '/checksums.json', json_encode($hashes, $jsonOptions));
+
+echo 'Checksums file generated' . PHP_EOL . PHP_EOL;