From 3e44e9eed677f71329bbdcdfe6db4032578c9111 Mon Sep 17 00:00:00 2001
From: Dries Buytaert <dries@buytaert.net>
Date: Sat, 10 Jul 2010 01:57:32 +0000
Subject: - Patch #819388 by pwolanin: switch registry back to using hashes not
 file mtime and ctime.

---
 includes/registry.inc | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

(limited to 'includes/registry.inc')

diff --git a/includes/registry.inc b/includes/registry.inc
index 7b54e4833..9a12e393f 100644
--- a/includes/registry.inc
+++ b/includes/registry.inc
@@ -65,11 +65,9 @@ function _registry_update() {
     // or modify attributes of a file.
     drupal_alter('registry_files', $files, $modules);
     foreach (registry_get_parsed_files() as $filename => $file) {
-      // Add the file creation and modification dates to those files we have
-      // already parsed.
+      // Add the hash for those files we have already parsed.
       if (isset($files[$filename])) {
-        $files[$filename]['filectime'] = $file['filectime'];
-        $files[$filename]['filemtime'] = $file['filemtime'];
+        $files[$filename]['hash'] = $file['hash'];
       }
       else {
         // Flush the registry of resources in files that are no longer on disc
@@ -129,22 +127,15 @@ function registry_get_parsed_files() {
  */
 function _registry_parse_files($files) {
   $parsed_files = array();
-  $filetimes = array();
   foreach ($files as $filename => $file) {
     if (file_exists($filename)) {
-      $filetimes[$filename] = array(
-        'filectime' => filectime($filename),
-        'filemtime' => filemtime($filename),
-      );
-
-      $modified_file = !isset($file['filectime']) || !isset($file['filemtime'])
-                  || $filetimes[$filename]['filectime'] != $file['filectime'] 
-                  || $filetimes[$filename]['filemtime'] != $file['filemtime'];
-      if ($modified_file) {
+      $hash = hash_file('sha256', $filename);
+      if (empty($file['hash']) || $file['hash'] != $hash) {
         // Delete registry entries for this file, so we can insert the new resources.
         db_delete('registry')
           ->condition('filename', $filename)
           ->execute();
+        $file['hash'] = $hash;
         $parsed_files[$filename] = $file;
       }
     }
@@ -154,8 +145,7 @@ function _registry_parse_files($files) {
     db_merge('registry_file')
       ->key(array('filename' => $filename))
       ->fields(array(
-        'filectime' => $filetimes[$filename]['filectime'],
-        'filemtime' => $filetimes[$filename]['filemtime'],
+        'hash' => $file['hash'],
       ))
       ->execute();
   }
-- 
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