require_once( "$IP/extensions/GlobalUserGroups/GlobalUserGroups.php" );
// use extra translations for various user group names and similars
$wgGlobalUserGroupsUseEMWT = true;
// the following groups are defined as global, and intend to award on Special:UserRights listed in all the databases in $wgLocalDatabases are entered into the table 'user_groups' for each user
// for example:
$wgGlobalUserGroups = array(
    'bot-global',
    'rollback-global',
    'sysadmin',
    'sysop-global',
);

// databases of the wiki family [indispensable] (if you haven't already set this adjustment)
$wgLocalDatabases = array(
    'mainwiki',
    'dewiki',
    'enwiki',
);

// shared database settings (if you haven't already set this adjustment)
$wgSharedDB = 'yourshareddatabase';
// using a global users list
$wgSharedTables[] = 'user'; // users
$wgSharedTables[] = 'user_properties'; // user's preferences
$wgEnableMWSuggest = true; // show the wiki's database in browsers source code (available but not required)

// permissions for global groups
// for example:
$wgGroupPermissions['sysop-global'] = $wgGroupPermissions['sysop']; // copy the local sysop permissions to the global sysop group
$wgGroupPermissions['bot-global'] = $wgGroupPermissions['bot']; // copy the local bot permissions to the global bot group

$wgGroupPermissions['rollback-global']['rollback']         = true; // allows to revert edits by an user with one click
$wgGroupPermissions['rollback-global']['suppressredirect'] = true; // global rollbackers can move a page without automatically creating a redirect

$wgGroupPermissions['sysadmin']['siteadmin']               = true; // system administrators can lock and unlock a database local
$wgGroupPermissions['sysadmin']['userrights']              = true; // system administrators can edit all user rights (global and local memberships)

// bureaucrats can't give global group memberships and a bureaucrat cannot demote another bureaucrat but a bureaucrat can remove the own bureaucrat flag
$wgGroupPermissions['bureaucrat']['userrights'] = false;
$wgAddGroups['bureaucrat'][] = 'bot';
$wgAddGroups['bureaucrat'][] = 'sysop';
$wgAddGroups['bureaucrat'][] = 'bureaucrat';
$wgRemoveGroups['bureaucrat'][] = 'bot';
$wgRemoveGroups['bureaucrat'][] = 'sysop';
$wgGroupsRemoveFromSelf['bureaucrat'][] = 'bureaucrat'; // can remove own bureaucrat flag