/**
* Creates a table {prefix}upgrade_lock that is used as a mutex for upgrades.
*
* @see _elgg_upgrade_lock()
*
* @return bool
* @access private
*/
function _elgg_upgrade_lock()
{
global $CONFIG;
if (!_elgg_upgrade_is_locked()) {
// lock it
insert_data("create table {$CONFIG->dbprefix}upgrade_lock (id INT)");
elgg_log('Locked for upgrade.', 'NOTICE');
return true;
}
elgg_log('Cannot lock for upgrade: already locked.', 'WARNING');
return false;
}
<?php
/**
* Admin control panel widget
*/
elgg_register_menu_item('admin_control_panel', array('name' => 'flush', 'text' => elgg_echo('admin:cache:flush'), 'href' => 'action/admin/site/flush_cache', 'is_action' => true, 'link_class' => 'elgg-button elgg-button-action'));
// @todo Move in this in ElggUpgradeManager::isLocked() when #4682 fixed
$is_locked = _elgg_upgrade_is_locked();
if (!$is_locked) {
elgg_register_menu_item('admin_control_panel', array('name' => 'upgrade', 'text' => elgg_echo('upgrade'), 'href' => 'upgrade.php', 'link_class' => 'elgg-button elgg-button-action'));
} else {
elgg_register_menu_item('admin_control_panel', array('name' => 'unlock_upgrade', 'text' => elgg_echo('upgrade:unlock'), 'href' => 'action/admin/site/unlock_upgrade', 'is_action' => true, 'link_class' => 'elgg-button elgg-button-action', 'confirm' => elgg_echo('upgrade:unlock:confirm')));
}
echo elgg_view_menu('admin_control_panel', array('class' => 'elgg-menu-hz', 'item_class' => 'mrm'));
<?php
/**
* Unlocks the upgrade script
*/
if (_elgg_upgrade_is_locked()) {
_elgg_upgrade_unlock();
}
system_message(elgg_echo('upgrade:unlock:success'));
forward(REFERER);