3 * Look for 'orphan' revisions hooked to pages which don't exist and
4 * 'childless' pages with no revisions.
5 * Then, kill the poor widows and orphans.
6 * Man this is depressing.
8 * Copyright © 2005 Brion Vibber <brion@pobox.com>
9 * https://www.mediawiki.org/
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24 * http://www.gnu.org/copyleft/gpl.html
27 * @author <brion@pobox.com>
28 * @ingroup Maintenance
31 require_once __DIR__
. '/Maintenance.php';
33 use Wikimedia\Rdbms\IMaintainableDatabase
;
36 * Maintenance script that looks for 'orphan' revisions hooked to pages which
37 * don't exist and 'childless' pages with no revisions.
39 * @ingroup Maintenance
41 class Orphans
extends Maintenance
{
42 public function __construct() {
43 parent
::__construct();
44 $this->addDescription( "Look for 'orphan' revisions hooked to pages which don't exist\n" .
45 "and 'childless' pages with no revisions\n" .
46 "Then, kill the poor widows and orphans\n" .
47 "Man this is depressing"
49 $this->addOption( 'fix', 'Actually fix broken entries' );
52 public function execute() {
53 $this->checkOrphans( $this->hasOption( 'fix' ) );
54 $this->checkSeparation( $this->hasOption( 'fix' ) );
55 # Does not work yet, do not use
56 # $this->checkWidows( $this->hasOption( 'fix' ) );
60 * Lock the appropriate tables for the script
61 * @param IMaintainableDatabase $db
62 * @param string[] $extraTable The name of any extra tables to lock (eg: text)
64 private function lockTables( $db, $extraTable = [] ) {
65 $tbls = [ 'page', 'revision', 'redirect' ];
67 $tbls = array_merge( $tbls, $extraTable );
69 $db->lockTables( [], $tbls, __METHOD__
, false );
73 * Check for orphan revisions
74 * @param bool $fix Whether to fix broken revisions when found
76 private function checkOrphans( $fix ) {
77 $dbw = $this->getDB( DB_MASTER
);
78 $commentStore = CommentStore
::getStore();
81 $this->lockTables( $dbw );
84 $commentQuery = $commentStore->getJoin( 'rev_comment' );
85 $actorQuery = ActorMigration
::newMigration()->getJoin( 'rev_user' );
87 $this->output( "Checking for orphan revision table entries... "
88 . "(this may take a while on a large wiki)\n" );
89 $result = $dbw->select(
90 [ 'revision', 'page' ] +
$commentQuery['tables'] +
$actorQuery['tables'],
91 [ 'rev_id', 'rev_page', 'rev_timestamp' ] +
$commentQuery['fields'] +
$actorQuery['fields'],
92 [ 'page_id' => null ],
95 [ 'page' => [ 'LEFT JOIN', [ 'rev_page=page_id' ] ] ] +
$commentQuery['joins']
96 +
$actorQuery['joins']
98 $orphans = $result->numRows();
102 $this->output( "$orphans orphan revisions...\n" );
103 $this->output( sprintf(
104 "%10s %10s %14s %20s %s\n",
105 'rev_id', 'rev_page', 'rev_timestamp', 'rev_user_text', 'rev_comment'
108 foreach ( $result as $row ) {
109 $comment = $commentStore->getComment( 'rev_comment', $row )->text
;
110 if ( $comment !== '' ) {
111 $comment = '(' . $wgContLang->truncateForVisual( $comment, 40 ) . ')';
113 $rev_user_text = $wgContLang->truncateForVisual( $row->rev_user_text
, 20 );
114 # pad $rev_user_text to 20 characters. Note that this may
115 # yield poor results if $rev_user_text contains combining
116 # or half-width characters. Alas.
117 if ( mb_strlen( $rev_user_text ) < 20 ) {
118 $rev_user_text = str_repeat( ' ', 20 - mb_strlen( $rev_user_text ) );
120 $this->output( sprintf( "%10d %10d %14s %s %s\n",
127 $dbw->delete( 'revision', [ 'rev_id' => $row->rev_id
] );
131 $this->output( "Run again with --fix to remove these entries automatically.\n" );
134 $this->output( "No orphans! Yay!\n" );
138 $dbw->unlockTables( __METHOD__
);
144 * @todo DON'T USE THIS YET! It will remove entries which have children,
145 * but which aren't properly attached (eg if page_latest is bogus
146 * but valid revisions do exist)
148 private function checkWidows( $fix ) {
149 $dbw = $this->getDB( DB_MASTER
);
150 $page = $dbw->tableName( 'page' );
151 $revision = $dbw->tableName( 'revision' );
154 $this->lockTables( $dbw );
157 $this->output( "\nChecking for childless page table entries... "
158 . "(this may take a while on a large wiki)\n" );
159 $result = $dbw->query( "
161 FROM $page LEFT OUTER JOIN $revision ON page_latest=rev_id
164 $widows = $result->numRows();
166 $this->output( "$widows childless pages...\n" );
167 $this->output( sprintf( "%10s %11s %2s %s\n", 'page_id', 'page_latest', 'ns', 'page_title' ) );
168 foreach ( $result as $row ) {
169 printf( "%10d %11d %2d %s\n",
172 $row->page_namespace
,
175 $dbw->delete( 'page', [ 'page_id' => $row->page_id
] );
179 $this->output( "Run again with --fix to remove these entries automatically.\n" );
182 $this->output( "No childless pages! Yay!\n" );
186 $dbw->unlockTables( __METHOD__
);
191 * Check for pages where page_latest is wrong
192 * @param bool $fix Whether to fix broken entries
194 private function checkSeparation( $fix ) {
195 $dbw = $this->getDB( DB_MASTER
);
196 $page = $dbw->tableName( 'page' );
197 $revision = $dbw->tableName( 'revision' );
200 $this->lockTables( $dbw, [ 'user', 'text' ] );
203 $this->output( "\nChecking for pages whose page_latest links are incorrect... "
204 . "(this may take a while on a large wiki)\n" );
205 $result = $dbw->query( "
207 FROM $page LEFT OUTER JOIN $revision ON page_latest=rev_id
210 foreach ( $result as $row ) {
211 $result2 = $dbw->query( "
212 SELECT MAX(rev_timestamp) as max_timestamp
214 WHERE rev_page=" . (int)( $row->page_id
)
216 $row2 = $dbw->fetchObject( $result2 );
218 if ( $row->rev_timestamp
!= $row2->max_timestamp
) {
220 $this->output( sprintf( "%10s %10s %14s %14s\n",
221 'page_id', 'rev_id', 'timestamp', 'max timestamp' ) );
224 $this->output( sprintf( "%10d %10d %14s %14s\n",
228 $row2->max_timestamp
) );
231 $maxId = $dbw->selectField(
235 'rev_page' => $row->page_id
,
236 'rev_timestamp' => $row2->max_timestamp
] );
237 $this->output( "... updating to revision $maxId\n" );
238 $maxRev = Revision
::newFromId( $maxId );
239 $title = Title
::makeTitle( $row->page_namespace
, $row->page_title
);
240 $article = WikiPage
::factory( $title );
241 $article->updateRevisionOn( $dbw, $maxRev );
245 $this->output( "wtf\n" );
250 $this->output( "Found $found pages with incorrect latest revision.\n" );
252 $this->output( "No pages with incorrect latest revision. Yay!\n" );
254 if ( !$fix && $found > 0 ) {
255 $this->output( "Run again with --fix to remove these entries automatically.\n" );
259 $dbw->unlockTables( __METHOD__
);
264 $maintClass = Orphans
::class;
265 require_once RUN_MAINTENANCE_IF_MAIN
;