Add and remove cron entry for scheduler.

CronManagerCommand.php

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Symfony\Component\Process\Exception\ProcessFailedException;
use Symfony\Component\Process\Process;

class CronManagerCommand extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'schedule:cron {action}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Add and remove cron entry for scheduler.';


    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        $command = 'crontab -l | grep -v \'schedule:run\'  | crontab -';

        switch ($this->argument('action')) {
            case  'add':
                $command = $command.' && (crontab -l ; echo "* * * * * php ${PWD}/artisan schedule:run >> /dev/null 2>&1") | crontab -';
                $message = 'Added crontab entry for scheduler.';
                break;
            case  'rem':
            case  'remove':
                $message = 'Removed crontab entry for scheduler.';
                break;

            default:
                $this->info('Available actions are [add|remove]');
                exit();
        }

        $process = new Process($command);

        $process->run();

        if ( ! $process->isSuccessful()) {
            throw new ProcessFailedException($process);
        }

        $this->line($process->getOutput());
        $this->info($message);
    }
}