- Patch #576096 by CorniI: use the new cache API.

includes/cache-install.inc

@@ -10,19 +10,23 @@
  * implementation during normal operations would have a negative impact
  * on performance.
  */
+class DrupalFakeCache implements DrupalCacheInterface {
+  function __construct($bin) {
+  }
 
-function cache_get($key, $table = 'cache') {
-  return FALSE;
-}
+  function get($cid) {
+    return FALSE;
+  }
 
-function cache_get_multiple(array &$cids, $bin = 'cache') {
-  return array();
-}
+  function getMultiple(&$cids) {
+    return array();
+  }
 
-function cache_set($cid, $data, $table = 'cache', $expire = CACHE_PERMANENT, $headers = NULL) {
-  return;
-}
 
-function cache_clear_all($cid = NULL, $table = NULL, $wildcard = FALSE) {
-  return;
+  function set($cid, $data, $expire = CACHE_PERMANENT, array $headers = NULL) {
+  }
+
+  function clear($cid = NULL, $wildcard = FALSE) {
+  }
+	
 }

install.php

@@ -257,6 +257,13 @@ function install_begin_request(&$install_state) {
   drupal_load('module', 'filter');
   drupal_load('module', 'user');
 
+  // Load the cache infrastructure with the Fake Cache. Switch to the database cache
+  // later if possible.
+  require_once DRUPAL_ROOT . '/includes/cache.inc';
+  require_once DRUPAL_ROOT . '/includes/cache-install.inc';
+  $conf['cache_inc'] = 'includes/cache.inc';
+  $conf['cache_default_class'] = 'DrupalFakeCache';
+   
   // Prepare for themed output, if necessary. We need to run this at the
   // beginning of the page request to avoid a different theme accidentally
   // getting set.
@@ -271,8 +278,7 @@ function install_begin_request(&$install_state) {
     // Since we have a database connection, we use the normal cache system.
     // This is important, as the installer calls into the Drupal system for
     // the clean URL checks, so we should maintain the cache properly.
-    require_once DRUPAL_ROOT . '/includes/cache.inc';
-    $conf['cache_inc'] = 'includes/cache.inc';
+    unset($conf['cache_default_class']);
 
     // Initialize the database system. Note that the connection
     // won't be initialized until it is actually requested.
@@ -282,13 +288,6 @@ function install_begin_request(&$install_state) {
     $task = install_verify_completed_task();
   }
   else {
-    // Since no persistent storage is available yet, and functions that check
-    // for cached data will fail, we temporarily replace the normal cache
-    // system with a stubbed-out version that short-circuits the actual
-    // caching process and avoids any errors.
-    require_once DRUPAL_ROOT . '/includes/cache-install.inc';
-    $conf['cache_inc'] = 'includes/cache-install.inc';
-
     $task = NULL;
 
     // Since previous versions of Drupal stored database connection information