Example Artisan "tail" command

console.php

<?php

use Illuminate\Foundation\Inspiring;
use Illuminate\Support\Facades\Artisan;
use Symfony\Component\Process\Process;

/*
|--------------------------------------------------------------------------
| Console Routes
|--------------------------------------------------------------------------
|
| This file is where you may define all of your Closure based console
| commands. Each Closure is bound to a command instance allowing a
| simple approach to interacting with each command's IO methods.
|
*/

Artisan::command(
    'tail {file=storage/logs/laravel.log : A path to the file being tailed. }
          {--only= : Grep the output for a specific string. }
    ',
    function () {
        $command = 'tail -f "$FILE" | grep "$ONLY"';

        Process::fromShellCommandline($command)
            ->setTty(true)
            ->setTimeout(null)
            ->run(null, [
                'FILE' => $this->argument('file'),
                'ONLY' => $this->option('only'),
            ]);
    })->purpose('Tail the app log file.');