deleteOldRevisions.php

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<?php
require_once __DIR__ . '/Maintenance.php';

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__ );
            $this->output( "done.\n" );
        }

        # This bit's done
        # Purge redundant text records
        $this->commitTransaction( $dbw, __METHOD__ );
        if ( $delete ) {
            $this->purgeRedundantText( true );
        }
    }
}

$maintClass = "DeleteOldRevisions";
require_once RUN_MAINTENANCE_IF_MAIN;