Extension:User Merge and Delete

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User Merge and Delete Release status: stable
Implementation	Special page, User identity
Description	Merges references from one user to another user in the Wiki database - will also delete old users following merge
Author(s)	Tim Laqua
Last Version	1.5 (2008-02-11)
MediaWiki	1.11+
License	No license specified
Download	Download snapshot Subversion [Help] Browse source code
check usage (experimental)

User Merge and Delete extension allows Wiki users with the 'usermerge' permission (Bureaucrat by default) to merge one Wiki user's account with another Wiki user's account - deleting following merge is also supported. You may not delete a user without merging first - omitting the "New User" field will auto-populate the New User as "Anonymous", user_id 0 and ask you to confirm merge to Anonymous.

• Extension now (since 1.2) creates a User Merge log and logs all User Merge extension activity.

[edit] Installation

1. Create a new folder (directory) in the following location:
   wiki-install-folder/extensions/UserMerge
2. Download the four required files:
   • UserMerge_body.php
   • UserMerge.alias.php
   • UserMerge.i18n.php
   • UserMerge.php
3. Copy the four files in to the new UserMerge folder
4. Add the following code to your LocalSettings.php (at the bottom)

require_once( "$IP/extensions/UserMerge/UserMerge.php" );
$wgGroupPermissions['bureaucrat']['usermerge'] = true;
 
#optional - default is array( 'sysop' )
$wgUserMergeProtectedGroups = array( 'groupname' );

• Note the change to group-based merge protection ($wgUserMergeProtectedGroups) in v1.5, r30872.
• Note the addition of the 'usermerge' permission in 1.2 - this must be explicitly granted as shown above.

[edit] Usage

1. Follow Installation Instructions
2. You will have a new Restricted Special Page called Special:UserMerge with the title Merge and Delete Users.
3. Defining unmergable users (Examples):

#Allow ALL users to be merged (by default, the 'sysop' group is unmergable)
$wgUserMergeProtectedGroups = array();

#Disallow merging of the users in the 'sysop' or 'awesomeusers' groups
$wgUserMergeUnmergeable = array( 'sysop', 'awesomeusers' );