1 files changed, 23 insertions, 0 deletions
diff --git a/modules/block/block.install b/modules/block/block.install
index cc2dd690d..0b4544ed0 100644
--- a/modules/block/block.install
+++ b/modules/block/block.install
@@ -178,6 +178,16 @@ function block_schema() {
  */
 function block_install() {
   drupal_install_schema('block');
+  
+  // Block should go first so that other modules can alter its output 
+  // during hook_page_alter(). Almost everything on the page is a block,
+  // so before block module runs, there will not be much to alter.
+  db_update('system')
+    ->fields(array(
+      'weight' => -5,
+    ))
+    ->condition('name', 'block')
+    ->execute();
 }
 
 /**
@@ -186,3 +196,16 @@ function block_install() {
 function block_uninstall() {
   drupal_uninstall_schema('block');
 }
+
+/**
+ * Set system.weight to a low value for block module.
+ * 
+ * Block should go first so that other modules can alter its output 
+ * during hook_page_alter(). Almost everything on the page is a block,
+ * so before block module runs, there will not be much to alter.
+ */
+function block_update_7000() {
+  $ret = array();
+  $ret[] = update_sql("UPDATE {system} SET weight = -5 WHERE name = 'block'");
+  return $ret;
+}