From 7dbb3330c23c11d33ca375c70ff2de11b10ca04a Mon Sep 17 00:00:00 2001
From: "Cathy J. Fitzpatrick" <cathy@cathyjf.com>
Date: Fri, 25 Jan 2013 23:36:33 -0700
Subject: [PATCH] New system to automatically update version strings

The index.php file specifies a version query string for each
resource which is likely to change. For example:

    <script src="/js/sim.js?v0.8.2c"></script>

Each time the file is changed, we have incremented the version
number so that browsers and/or the CDN know to download the
file from the web site, rather than using a cached version.
This works because changing the version query string changes
the file name of the resource.

This commit introduces a new program (update-version-query-strings)
which parses index.php and sets each version query string to be
the MD5 hash of the corresponding resource. On the live web
server, this program is set to run for the following git hooks:

    post-commit, post-checkout, post-merge, post-rewrite

This new system removes the need to manually update version query
strings. Instead, the version query strings will be automatically
updated when we update the live web site from now on.
---
 githooks/update-version-query-strings | 21 ++++++++++++++
 index.php                             | 40 +++++++++++++--------------
 2 files changed, 41 insertions(+), 20 deletions(-)
 create mode 100755 githooks/update-version-query-strings

diff --git a/githooks/update-version-query-strings b/githooks/update-version-query-strings
new file mode 100755
index 000000000..71c5b430d
--- /dev/null
+++ b/githooks/update-version-query-strings
@@ -0,0 +1,21 @@
+#!/usr/bin/env php
+<?php
+/**
+ * This script parses index.php and sets the version query string of each
+ * resource to be the MD5 hash of that resource. This script should be executed
+ * from the base directory of the repository.
+ *
+ * On the live web server, this script is set as the following git hooks:
+ *   post-commit, post-checkout, post-merge, post-rewrite
+ */
+
+define('SOURCE_FILE', 'index.php');
+
+file_put_contents(SOURCE_FILE,
+		preg_replace_callback('/(src|href)="\/(.*?)\?[a-z0-9]*?"/',
+				function($m) {
+					$hash = md5_file($m[2]);
+					return "${m[1]}=\"/${m[2]}?${hash}\"";
+				},
+			file_get_contents(SOURCE_FILE)));
+
diff --git a/index.php b/index.php
index 36a8e114b..d51829031 100644
--- a/index.php
+++ b/index.php
@@ -84,9 +84,9 @@ $serverlibrary = $serverlibs[$serverprotocol];
 		<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
 		<title>Showdown!</title>
 		<link rel="shortcut icon" href="/favicon.ico" id="dynamic-favicon" />
-		<link rel="stylesheet" href="/style/sim.css?v0.7.15" />
+		<link rel="stylesheet" href="/style/sim.css?" />
 		<link rel="stylesheet" href="/style/sim-types.css" />
-		<link rel="stylesheet" href="/style/battle.css?v0.8b4" />
+		<link rel="stylesheet" href="/style/battle.css?" />
 		<link rel="stylesheet" href="/style/replayer.css" /><!-- utilichart -->
 		<link rel="stylesheet" href="/style/font-awesome.css" />
 <?php if (@$serverdata['customcss']) { ?>
@@ -174,41 +174,41 @@ $serverlibrary = $serverlibs[$serverprotocol];
 		<script src="/js/autoresize.jquery.min.js"></script>
 		<script src="/js/jquery-cookie.js"></script>
 		<script src="/js/jquery.json-2.3.min.js"></script>
-		<script src="/js/soundmanager2.js?v0.6"></script>
+		<script src="/js/soundmanager2.js?"></script>
 
 		<script>
 			document.getElementById('loading-message').innerHTML += ' DONE<br />Loading client...';
 			document.getElementById('loading-message').innerHTML = 'If the client is taking a long time to load, try refreshing in a few minutes. If it still doesn\'t work, Pokemon Showdown may be down for maintenance. We apologize for the inconvenience.<br /><br />'+document.getElementById('loading-message').innerHTML;
 		</script>
 
-		<script src="/js/battledata.js?v0.8.1"></script>
-		<script src="/data/pokedex-mini.js?v0.7.18.8"></script>
-		<script src="/js/battle.js?v0.8.3"></script>
+		<script src="/js/battledata.js?"></script>
+		<script src="/data/pokedex-mini.js?"></script>
+		<script src="/js/battle.js?"></script>
 		<!--script src="http://'.$server.':'.$serverport.'/socket.io/socket.io.js"></script-->
 		<script src="<?php echo $serverlibrary; ?>"></script>
-		<script src="/js/teambuilder.js?v0.7.12"></script>
-		<script src="/js/ladder.js?v0.8.2"></script>
-		<script src="/js/sim.js?v0.8.2c"></script>
+		<script src="/js/teambuilder.js?"></script>
+		<script src="/js/ladder.js?"></script>
+		<script src="/js/sim.js?"></script>
 
 		<script>
 			document.getElementById('loading-message').innerHTML += ' DONE<br />Connecting to login server...';
 			if (Config.down) overlay('down');
 		</script>
 		
-		<script src="/data/learnsets.js?v0.7.18.1"></script>
+		<script src="/data/learnsets.js?"></script>
 		
-		<script src="/data/graphics.js?v0.7.16"></script>
-		<script src="/data/pokedex.js?v0.7.18.8"></script>
-		<script src="/data/formats-data.js?v0.8.0"></script>
-		<script src="/data/moves.js?v0.7.10"></script>
-		<script src="/data/items.js?v0.7rc"></script>
-		<script src="/data/abilities.js?v0.7rc"></script>
-		<script src="/data/formats.js?v0.7.12"></script>
-		<script src="/data/typechart.js?v0.6rc"></script>
+		<script src="/data/graphics.js?"></script>
+		<script src="/data/pokedex.js?"></script>
+		<script src="/data/formats-data.js?"></script>
+		<script src="/data/moves.js?"></script>
+		<script src="/data/items.js?"></script>
+		<script src="/data/abilities.js?"></script>
+		<script src="/data/formats.js?"></script>
+		<script src="/data/typechart.js?"></script>
 		
-		<script src="/js/utilichart.js?v0.7rc"></script>
+		<script src="/js/utilichart.js?"></script>
 		
-		<script src="/data/aliases.js?v0.7.18.8" async="async"></script>
+		<script src="/data/aliases.js?" async="async"></script>
 		<script>
 			updateResize();
 			if (init) init();