From 371eb5b6e70e86d24bb3517b1291b229807b20dd Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Fri, 3 Jul 2009 06:56:46 +0000
Subject: [PATCH] (bug 19447) Disable the localisation store backend during
 install and update.

---
 config/index.php               |  2 ++
 includes/AutoLoader.php        |  1 +
 includes/LocalisationCache.php | 20 ++++++++++++++++++++
 maintenance/update.php         |  5 +++++
 4 files changed, 28 insertions(+)

diff --git a/config/index.php b/config/index.php
index c2a478b495..c20706959a 100644
--- a/config/index.php
+++ b/config/index.php
@@ -831,6 +831,8 @@ if( $conf->posted && ( 0 == count( $errs ) ) ) {
 			define( 'STDERR', fopen("php://stderr", "wb"));
 		$wgUseDatabaseMessages = false; /* FIXME: For database failure */
 		require_once( "$IP/includes/Setup.php" );
+		Language::getLocalisationCache()->disableBackend();
+		
 		chdir( "config" );
 
 		$wgTitle = Title::newFromText( "Installation script" );
diff --git a/includes/AutoLoader.php b/includes/AutoLoader.php
index aef9297c11..82743f3963 100644
--- a/includes/AutoLoader.php
+++ b/includes/AutoLoader.php
@@ -117,6 +117,7 @@ $wgAutoloadLocalClasses = array(
 	'Job' => 'includes/JobQueue.php',
 	'LCStore_DB' => 'includes/LocalisationCache.php',
 	'LCStore_CDB' => 'includes/LocalisationCache.php',
+	'LCStore_Null' => 'includes/LocalisationCache.php',
 	'License' => 'includes/Licenses.php',
 	'Licenses' => 'includes/Licenses.php',
 	'LinkBatch' => 'includes/LinkBatch.php',
diff --git a/includes/LocalisationCache.php b/includes/LocalisationCache.php
index d5ad4241de..0974f4ad92 100644
--- a/includes/LocalisationCache.php
+++ b/includes/LocalisationCache.php
@@ -648,6 +648,13 @@ class LocalisationCache {
 			}
 		}
 	}
+
+	/**
+	 * Disable the storage backend
+	 */
+	public function disableBackend() {
+		$this->store = new LCStore_Null;
+	}
 }
 
 /**
@@ -824,6 +831,19 @@ class LCStore_CDB implements LCStore {
 	}
 }
 
+/**
+ * Null store backend, used to avoid DB errors during install
+ */
+class LCStore_Null implements LCStore {
+	public function get( $code, $key ) {
+		return null;
+	}
+
+	public function startWrite( $code ) {}
+	public function finishWrite() {}
+	public function set( $key, $value ) {}
+}
+
 /**
  * A localisation cache optimised for loading large amounts of data for many 
  * languages. Used by rebuildLocalisationCache.php.
diff --git a/maintenance/update.php b/maintenance/update.php
index 8816f94331..6c52ef1bc3 100644
--- a/maintenance/update.php
+++ b/maintenance/update.php
@@ -13,6 +13,11 @@
 $wgUseMasterForMaintenance = true;
 require( "commandLine.inc" );
 require( "updaters.inc" );
+
+# Don't try to load stuff from l10n_cache yet
+$lc = Language::getLocalisationCache();
+$lc->disableBackend();
+
 $wgTitle = Title::newFromText( "MediaWiki database updater" );
 
 echo( "MediaWiki {$wgVersion} Updater\n\n" );
-- 
2.20.1