Old stuff had been removed from the update routine

boot.php

@@ -619,10 +619,17 @@ function is_ajax()
 function check_db($via_worker)
 {
 	$build = Config::get('system', 'build');
-	if (!x($build)) {
+
+	if (empty($build)) {
 		Config::set('system', 'build', DB_UPDATE_VERSION);
 		$build = DB_UPDATE_VERSION;
 	}
+
+	// We don't support upgrading from very old versions anymore
+	if ($build < NEW_UPDATE_ROUTINE_VERSION) {
+		die('You try to update from a version prior to database version 1170. The direct upgrade path is not supported. Please update to version 3.5.4 before updating to this version.');
+	}
+
 	if ($build != DB_UPDATE_VERSION) {
 		// When we cannot execute the database update via the worker, we will do it directly
 		if (!Worker::add(PRIORITY_CRITICAL, 'DBUpdate') && $via_worker) {
@@ -647,7 +654,7 @@ function check_url(App $a)
 	// and www.example.com vs example.com.
 	// We will only change the url to an ip address if there is no existing setting
 
-	if (!x($url)) {
+	if (empty($url)) {
 		$url = Config::set('system', 'url', System::baseUrl());
 	}
 	if ((!link_compare($url, System::baseUrl())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $a->get_hostname))) {
@@ -664,7 +671,8 @@ function check_url(App $a)
 function update_db(App $a)
 {
 	$build = Config::get('system', 'build');
-	if (!x($build)) {
+
+	if (empty($build)) {
 		$build = Config::set('system', 'build', DB_UPDATE_VERSION);
 	}
 
@@ -674,15 +682,7 @@ function update_db(App $a)
 		if ($stored < $current) {
 			Config::load('database');
 
-			// We're reporting a different version than what is currently installed.
-			// Run any existing update scripts to bring the database up to current.
-			// make sure that boot.php and update.php are the same release, we might be
-			// updating right this very second and the correct version of the update.php
-			// file may not be here yet. This can happen on a very busy site.
-
-			if (DB_UPDATE_VERSION == UPDATE_VERSION) {
 			// Compare the current structure with the defined structure
-
 			$t = Config::get('database', 'dbupdate_' . DB_UPDATE_VERSION);
 			if (!is_null($t)) {
 				return;
@@ -690,19 +690,7 @@ function update_db(App $a)
 
 			Config::set('database', 'dbupdate_' . DB_UPDATE_VERSION, time());
 
-				// run old update routine (wich could modify the schema and
+			// run update routine
-				// conflits with new routine)
-				for ($x = $stored; $x < NEW_UPDATE_ROUTINE_VERSION; $x++) {
-					$r = run_update_function($x);
-					if (!$r) {
-						break;
-					}
-				}
-				if ($stored < NEW_UPDATE_ROUTINE_VERSION) {
-					$stored = NEW_UPDATE_ROUTINE_VERSION;
-				}
-
-				// run new update routine
 			// it update the structure in one call
 			$retval = DBStructure::update(false, true);
 			if ($retval) {
@@ -724,7 +712,6 @@ function update_db(App $a)
 			}
 		}
 	}
-	}
 
 	return;
 }
@@ -996,7 +983,7 @@ function remote_user()
 	if (local_user()) {
 		return false;
 	}
-	if ((x($_SESSION, 'authenticated')) && (x($_SESSION, 'visitor_id'))) {
+	if (x($_SESSION, 'authenticated') && x($_SESSION, 'visitor_id')) {
 		return intval($_SESSION['visitor_id']);
 	}
 	return false;
@@ -1051,7 +1038,7 @@ function info($s)
 function get_max_import_size()
 {
 	$a = get_app();
-	return ((x($a->config, 'max_import_size')) ? $a->config['max_import_size'] : 0 );
+	return (x($a->config, 'max_import_size') ? $a->config['max_import_size'] : 0);
 }