From fa669fe0344f7c74a744e331fccf5aa323755295 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Niklas=20Laxstr=C3=B6m?= <nikerabbit@users.mediawiki.org>
Date: Fri, 30 Nov 2007 17:03:12 +0000
Subject: [PATCH] * (bug 8396) Ignore out-of-date serialised message caches *
 MediaWiki now checks if serialized files are out of date. New configuration  
 variable $wgCheckSerialized can be set to false to enable old behavior (i.e. 
  to not check and assume they are always up to date)

---
 RELEASE-NOTES                |  4 ++++
 includes/DefaultSettings.php |  6 ++++++
 languages/Language.php       | 15 ++++++++++-----
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 4c38b60c7f..4419cf581d 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -22,6 +22,9 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
 * Marking edits as bot edits with Special:Contributions?bot=1 now requires the
   markbotedit permission, rather than the rollback permission previously used.
   This permission is assigned by default to the sysop group.
+* MediaWiki now checks if serialized files are out of date. New configuration
+  variable $wgCheckSerialized can be set to false to enable old behavior (i.e.
+  to not check and assume they are always up to date)
 
 === New features in 1.12 ===
 * (bug 10735) Add a warning for non-descriptive filenames at Special:Upload
@@ -82,6 +85,7 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
 * (bug 9633) Add a predefined list of delete reasons to the deletion form
 * Show a warning message when creating/editing a user (talk) page but the user
   does not exists
+* (bug 8396) Ignore out-of-date serialised message caches
 
 === Bug fixes in 1.12 ===
 
diff --git a/includes/DefaultSettings.php b/includes/DefaultSettings.php
index 56ae28bec2..b1ea6e5959 100644
--- a/includes/DefaultSettings.php
+++ b/includes/DefaultSettings.php
@@ -806,6 +806,12 @@ $wgMsgCacheExpiry	= 86400;
  */
 $wgMaxMsgCacheEntrySize = 10000;
 
+/**
+ * Set to false if you are thorough system admin who always remembers to keep
+ * serialized files up to date to save few mtime calls.
+ */
+$wgCheckSerialized = true;
+
 # Whether to enable language variant conversion.
 $wgDisableLangConversion = false;
 
diff --git a/languages/Language.php b/languages/Language.php
index b2bf339bd7..bb9d44e33e 100644
--- a/languages/Language.php
+++ b/languages/Language.php
@@ -1956,7 +1956,7 @@ class Language {
 	 */
 	static function loadLocalisation( $code, $disableCache = false ) {
 		static $recursionGuard = array();
-		global $wgMemc;
+		global $wgMemc, $wgCheckSerialized;
 
 		if ( !$code ) {
 			throw new MWException( "Invalid language code requested" );
@@ -1973,10 +1973,15 @@ class Language {
 			# Try the serialized directory
 			$cache = wfGetPrecompiledData( self::getFileName( "Messages", $code, '.ser' ) );
 			if ( $cache ) {
-				self::$mLocalisationCache[$code] = $cache;
-				wfDebug( "Language::loadLocalisation(): got localisation for $code from precompiled data file\n" );
-				wfProfileOut( __METHOD__ );
-				return self::$mLocalisationCache[$code]['deps'];
+				if ( $wgCheckSerialized && self::isLocalisationOutOfDate( $cache ) ) {
+					$cache = false;
+					wfDebug( "Language::loadLocalisation(): precompiled data file for $code is out of date\n" );
+				} else {
+					self::$mLocalisationCache[$code] = $cache;
+					wfDebug( "Language::loadLocalisation(): got localisation for $code from precompiled data file\n" );
+					wfProfileOut( __METHOD__ );
+					return self::$mLocalisationCache[$code]['deps'];
+				}
 			}
 
 			# Try the global cache
-- 
2.20.1