From bc869f8ec3f10dfc35b7568505ea4714f006f268 Mon Sep 17 00:00:00 2001
From: 3D-I <480857+3D-I@users.noreply.github.com>
Date: Thu, 2 Jul 2020 23:01:11 +0200
Subject: [PATCH] [ticket/16543] Add script for automate it on builds

PHPBB3-16543
---
 build/patch_stylesheet_cache_busters.php | 54 ++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 build/patch_stylesheet_cache_busters.php

diff --git a/build/patch_stylesheet_cache_busters.php b/build/patch_stylesheet_cache_busters.php
new file mode 100644
index 0000000000..cc7db550f4
--- /dev/null
+++ b/build/patch_stylesheet_cache_busters.php
@@ -0,0 +1,54 @@
+<?php declare(strict_types=1);
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+if (php_sapi_name() !== 'cli')
+{
+	die("This program must be run from the command line.\n");
+}
+
+if (version_compare(PHP_VERSION, '7.1.3', '<'))
+{
+	die('patch_stylesheet_cache_busters.php requires at least PHP 7.1.3');
+}
+
+// Usage: "$ php build/patch_stylesheet_cache_busters.php"
+$targets = [dirname(dirname(__FILE__)) . '/phpBB/styles/prosilver/theme/stylesheet.css'];
+
+array_map('patch_glob', $targets);
+
+function patch_glob($glob): void
+{
+	array_map('patch_file', glob($glob));
+}
+
+function patch_file(string $filepath): void
+{
+	$file	= file_get_contents($filepath);
+	$old	= $file;
+	$new	= preg_replace_callback(
+		'(^@import\\s+url\\([\'"](?<basename>\\w++\\.css)\\?\\K(?:hash|v)=[^\'"]++)m',
+		function ($m) use ($filepath)
+		{
+			$path = dirname($filepath) . DIRECTORY_SEPARATOR . $m['basename'];
+			$hash = sprintf('%08x', crc32(file_get_contents($path)));
+
+			return 'hash=' . $hash;
+		},
+		$old
+	);
+
+	if ($new !== $old)
+	{
+		file_put_contents($filepath, $new);
+	}
+}