ProfilerDisableCommand.php

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<?php
namespace Magento\Developer\Console\Command;

use Magento\Framework\Filesystem\Io\File;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class ProfilerDisableCommand extends Command
{
    const PROFILER_FLAG_FILE = 'var/profiler.flag';

    const COMMAND_NAME = 'dev:profiler:disable';

    const SUCCESS_MESSAGE = 'Profiler disabled.';

    private $filesystem;

    public function __construct(File $filesystem)
    {
        parent::__construct();
        $this->filesystem = $filesystem;
    }

    protected function configure()
    {
        $this->setName(self::COMMAND_NAME)
            ->setDescription('Disable the profiler.');

        parent::configure();
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $this->filesystem->rm(BP . '/' . self::PROFILER_FLAG_FILE);
        if (!$this->filesystem->fileExists(BP . '/' . self::PROFILER_FLAG_FILE)) {
            $output->writeln('<info>'. self::SUCCESS_MESSAGE . '</info>');
            return;
        }
        $output->writeln('<error>Something went wrong while disabling the profiler.</error>');
    }
}