populateFilearchiveSha1.php

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<?php
require_once dirname( __FILE__ ) . '/Maintenance.php';

class PopulateFilearchiveSha1 extends LoggedUpdateMaintenance {
    public function __construct() {
        parent::__construct();
        $this->mDescription = "Populate the fa_sha1 field from fa_storage_key";
    }

    protected function getUpdateKey() {
        return 'populate fa_sha1';
    }

    protected function updateSkippedMessage() {
        return 'fa_sha1 column of filearchive table already populated.';
    }

    public function doDBUpdates() {
        $startTime = microtime( true );
        $dbw = wfGetDB( DB_MASTER );
        $table = 'filearchive';
        $conds = array( 'fa_sha1' => '', 'fa_storage_key IS NOT NULL' );

        if ( !$dbw->fieldExists( $table, 'fa_sha1', __METHOD__ ) ) {
            $this->output( "fa_sha1 column does not exist\n\n", true );
            return false;
        }

        $this->output( "Populating fa_sha1 field from fa_storage_key\n" );
        $endId = $dbw->selectField( $table, 'MAX(fa_id)', false, __METHOD__ );

        $batchSize = $this->mBatchSize;
        $done = 0;

        do {
            $res = $dbw->select(
                $table,
                array( 'fa_id', 'fa_storage_key' ),
                $conds,
                __METHOD__,
                array( 'LIMIT' => $batchSize )
            );

            $i = 0;
            foreach ( $res as $row ) {
                if ( $row->fa_storage_key == '' ) {
                    // Revision was missing pre-deletion
                    continue;
                }
                $sha1 = LocalRepo::getHashFromKey( $row->fa_storage_key );
                $dbw->update( $table,
                    array( 'fa_sha1' => $sha1 ),
                    array( 'fa_id' => $row->fa_id ),
                    __METHOD__
                );
                $lastId = $row->fa_id;
                $i++;
            }

            $done += $i;
            if ( $i !== $batchSize ) {
                break;
            }

            // print status and let slaves catch up
            $this->output( sprintf(
                "id %d done (up to %d), %5.3f%%  \r", $lastId, $endId, $lastId / $endId * 100 ) );
            wfWaitForSlaves();
        } while ( true );

        $processingTime = microtime( true ) - $startTime;
        $this->output( sprintf( "\nDone %d files in %.1f seconds\n", $done, $processingTime ) );

        return true; // we only updated *some* files, don't log
    }
}

$maintClass = "PopulateFilearchiveSha1";
require_once RUN_MAINTENANCE_IF_MAIN;