findOrphanedFiles.php

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<?php
use MediaWiki\Title\Title;
use Wikimedia\Rdbms\OrExpressionGroup;
 
require_once __DIR__ . '/Maintenance.php';
 
class FindOrphanedFiles extends Maintenance {
    public function __construct() {
        parent::__construct();
 
        $this->addDescription( "Find unregistered files in the 'public' repo zone." );
        $this->addOption( 'subdir',
            'Only scan files in this subdirectory (e.g. "a/a0")', false, true );
        $this->addOption( 'verbose', "Mention file paths checked" );
        $this->setBatchSize( 500 );
    }
 
    public function execute() {
        $subdir = $this->getOption( 'subdir', '' );
        $verbose = $this->hasOption( 'verbose' );
 
        $repo = $this->getServiceContainer()->getRepoGroup()->getLocalRepo();
        if ( $repo->hasSha1Storage() ) {
            $this->fatalError( "Local repo uses SHA-1 file storage names; aborting." );
        }
 
        $directory = $repo->getZonePath( 'public' );
        if ( $subdir != '' ) {
            $directory .= "/$subdir/";
        }
 
        if ( $verbose ) {
            $this->output( "Scanning files under $directory:\n" );
        }
 
        $list = $repo->getBackend()->getFileList( [ 'dir' => $directory ] );
        if ( $list === null ) {
            $this->fatalError( "Could not get file listing." );
        }
 
        $pathBatch = [];
        foreach ( $list as $path ) {
            if ( preg_match( '#^(thumb|deleted)/#', $path ) ) {
                continue; // handle ugly nested containers on stock installs
            }
 
            $pathBatch[] = $path;
            if ( count( $pathBatch ) >= $this->getBatchSize() ) {
                $this->checkFiles( $repo, $pathBatch, $verbose );
                $pathBatch = [];
            }
        }
        $this->checkFiles( $repo, $pathBatch, $verbose );
    }
 
    protected function checkFiles( LocalRepo $repo, array $paths, $verbose ) {
        if ( !count( $paths ) ) {
            return;
        }
 
        $dbr = $repo->getReplicaDB();
 
        $curNames = [];
        $oldNames = [];
        $imgIN = [];
        $oiWheres = [];
        foreach ( $paths as $path ) {
            $name = basename( $path );
            if ( preg_match( '#^archive/#', $path ) ) {
                if ( $verbose ) {
                    $this->output( "Checking old file $name\n" );
                }
 
                $oldNames[] = $name;
                [ , $base ] = explode( '!', $name, 2 ); // <TS_MW>!<img_name>
                $oiWheres[]  = $dbr->expr( 'oi_name', '=', $base )->and( 'oi_archive_name', '=', $name );
            } else {
                if ( $verbose ) {
                    $this->output( "Checking current file $name\n" );
                }
 
                $curNames[] = $name;
                $imgIN[] = $name;
            }
        }
        $uqb = $dbr->newUnionQueryBuilder();
        $uqb->add(
            $dbr->newSelectQueryBuilder()
                ->select( [ 'name' => 'img_name', 'old' => '0' ] )
                ->from( 'image' )
                ->where( $imgIN ? [ 'img_name' => $imgIN ] : '1=0' )
        );
        $uqb->add(
            $dbr->newSelectQueryBuilder()
                ->select( [ 'name' => 'oi_archive_name', 'old' => '1' ] )
                ->from( 'oldimage' )
                ->where( $oiWheres ? new OrExpressionGroup( ...$oiWheres ) : '1=0' )
        );
 
        $res = $uqb->all()->caller( __METHOD__ )->fetchResultSet();
 
        $curNamesFound = [];
        $oldNamesFound = [];
        foreach ( $res as $row ) {
            if ( $row->old ) {
                $oldNamesFound[] = $row->name;
            } else {
                $curNamesFound[] = $row->name;
            }
        }
 
        foreach ( array_diff( $curNames, $curNamesFound ) as $name ) {
            $file = $repo->newFile( $name );
            // Print name and public URL to ease recovery
            if ( $file ) {
                $this->output( $name . "\n" . $file->getCanonicalUrl() . "\n\n" );
            } else {
                $this->error( "Cannot get URL for bad file title '$name'" );
            }
        }
 
        foreach ( array_diff( $oldNames, $oldNamesFound ) as $name ) {
            [ , $base ] = explode( '!', $name, 2 ); // <TS_MW>!<img_name>
            $file = $repo->newFromArchiveName( Title::makeTitle( NS_FILE, $base ), $name );
            // Print name and public URL to ease recovery
            $this->output( $name . "\n" . $file->getCanonicalUrl() . "\n\n" );
        }
    }
}
 
$maintClass = FindOrphanedFiles::class;
require_once RUN_MAINTENANCE_IF_MAIN;