UpgradeCommand.php

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<?php

namespace Elgg\Cli;

use Elgg\Application as ElggApplication;
use Elgg\Application\BootHandler;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

class UpgradeCommand extends BaseCommand {

    protected function configure() {
        $this->setName('upgrade')
            ->setDescription(elgg_echo('cli:upgrade:description'))
            ->addOption('force', 'f', InputOption::VALUE_NONE,
                elgg_echo('cli:upgrade:option:force')
            )
            ->addArgument('async', InputOption::VALUE_OPTIONAL,
                elgg_echo('cli:upgrade:argument:async')
            );
    }

    protected function execute(InputInterface $input, OutputInterface $output) {
        $this->input = $input;
        $this->output = $output;

        $async = (bool) $this->argument('async');
        $force = $this->option('force');

        $return = self::SUCCESS;

        // run Phinx (database) migrations
        ElggApplication::migrate();

        $app = ElggApplication::getInstance();
        $initial_app = clone $app;

        $boot = new BootHandler($app);
        $boot->bootServices();
        $boot->bootPlugins();

        // check if upgrade is locked
        $is_locked = _elgg_services()->mutex->isLocked('upgrade');
        if ($is_locked && !$force) {
            $this->error(elgg_echo('upgrade:locked'));
            
            return 1;
        } elseif ($is_locked && $force) {
            _elgg_services()->mutex->unlock('upgrade');
            
            $this->notice(elgg_echo('upgrade:unlock:success'));
        }

        // run system upgrades
        $upgrades = _elgg_services()->upgrades->getPendingUpgrades(false);
        $job = _elgg_services()->upgrades->run($upgrades);

        $job->then(
            function () {
                $this->notice(elgg_echo('cli:upgrade:system:upgraded'));
            },
            function ($errors) use (&$return) {
                $this->error(elgg_echo('cli:upgrade:system:failed'));

                if (!is_array($errors)) {
                    $errors = [$errors];
                }

                foreach ($errors as $error) {
                    $this->error($error);
                }
                
                $return = self::FAILURE;
            }
        );

        _elgg_services()->plugins->generateEntities();
        
        if ($return !== self::SUCCESS || !$async) {
            return $return;
        }

        // We want to reboot the application, because some of the services (e.g. dic) can bootstrap themselves again
        $app = $initial_app;
        ElggApplication::setInstance($initial_app);
        $app->start();

        // run async upgrades
        $upgrades = _elgg_services()->upgrades->getPendingUpgrades(true);
        $job = _elgg_services()->upgrades->run($upgrades);

        $job->then(
            function () {
                $this->notice(elgg_echo('cli:upgrade:async:upgraded'));
            },
            function ($errors) use (&$return) {
                $this->error(elgg_echo('cli:upgrade:aysnc:failed'));

                if (!is_array($errors)) {
                    $errors = [$errors];
                }

                foreach ($errors as $error) {
                    $this->error($error);
                }
                
                $return = self::FAILURE;
            }
        );

        return $return;
    }
}