1 files changed, 103 insertions, 0 deletions
diff --git a/www/wiki/maintenance/deleteOldRevisions.php b/www/wiki/maintenance/deleteOldRevisions.php
new file mode 100644
index 00000000..fc43e220
--- /dev/null
+++ b/www/wiki/maintenance/deleteOldRevisions.php
@@ -0,0 +1,103 @@
+<?php
+/**
+ * Delete old (non-current) revisions from the database
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Maintenance
+ * @author Rob Church <robchur@gmail.com>
+ */
+
+require_once __DIR__ . '/Maintenance.php';
+
+/**
+ * Maintenance script that deletes old (non-current) revisions from the database.
+ *
+ * @ingroup Maintenance
+ */
+class DeleteOldRevisions extends Maintenance {
+	public function __construct() {
+		parent::__construct();
+		$this->addDescription( 'Delete old (non-current) revisions from the database' );
+		$this->addOption( 'delete', 'Actually perform the deletion' );
+		$this->addOption( 'page_id', 'List of page ids to work on', false );
+	}
+
+	public function execute() {
+		$this->output( "Delete old revisions\n\n" );
+		$this->doDelete( $this->hasOption( 'delete' ), $this->mArgs );
+	}
+
+	function doDelete( $delete = false, $args = [] ) {
+		# Data should come off the master, wrapped in a transaction
+		$dbw = $this->getDB( DB_MASTER );
+		$this->beginTransaction( $dbw, __METHOD__ );
+
+		$pageConds = [];
+		$revConds = [];
+
+		# If a list of page_ids was provided, limit results to that set of page_ids
+		if ( count( $args ) > 0 ) {
+			$pageConds['page_id'] = $args;
+			$revConds['rev_page'] = $args;
+			$this->output( "Limiting to page IDs " . implode( ',', $args ) . "\n" );
+		}
+
+		# Get "active" revisions from the page table
+		$this->output( "Searching for active revisions..." );
+		$res = $dbw->select( 'page', 'page_latest', $pageConds, __METHOD__ );
+		$latestRevs = [];
+		foreach ( $res as $row ) {
+			$latestRevs[] = $row->page_latest;
+		}
+		$this->output( "done.\n" );
+
+		# Get all revisions that aren't in this set
+		$this->output( "Searching for inactive revisions..." );
+		if ( count( $latestRevs ) > 0 ) {
+			$revConds[] = 'rev_id NOT IN (' . $dbw->makeList( $latestRevs ) . ')';
+		}
+		$res = $dbw->select( 'revision', 'rev_id', $revConds, __METHOD__ );
+		$oldRevs = [];
+		foreach ( $res as $row ) {
+			$oldRevs[] = $row->rev_id;
+		}
+		$this->output( "done.\n" );
+
+		# Inform the user of what we're going to do
+		$count = count( $oldRevs );
+		$this->output( "$count old revisions found.\n" );
+
+		# Delete as appropriate
+		if ( $delete && $count ) {
+			$this->output( "Deleting..." );
+			$dbw->delete( 'revision', [ 'rev_id' => $oldRevs ], __METHOD__ );
+			$dbw->delete( 'ip_changes', [ 'ipc_rev_id' => $oldRevs ], __METHOD__ );
+			$this->output( "done.\n" );
+		}
+
+		# This bit's done
+		# Purge redundant text records
+		$this->commitTransaction( $dbw, __METHOD__ );
+		if ( $delete ) {
+			$this->purgeRedundantText( true );
+		}
+	}
+}
+
+$maintClass = DeleteOldRevisions::class;
+require_once RUN_MAINTENANCE_IF_MAIN;