Rename tv shows series through a pattern

composer.json

{
    "require": {
        "symfony/finder": "^4.1",
        "symfony/console": "^4.1",
        "symfony/debug": "^4.1",
        "symfony/filesystem": "^4.1"
    },
    "require-dev": {
        "symfony/var-dumper": "^4.1"
    },
    "replace": {
        "symfony/polyfill-mbstring": "*",
        "symfony/polyfill-ctype": "*"
    },
    "config": {
        "platform": {
            "php": "7.2"
        }
    },
    "license": "MIT",
    "authors": [
        {
            "name": "Baptiste Clavié",
            "email": "clavie.b@gmail.com"
        }
    ]
}

renamer.php

#!/usr/bin/env php
<?php declare(strict_types=1);
namespace Renamer;

use Symfony\Component\Console\Application;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Helper\ProgressBar;
use Symfony\Component\Console\Output\ConsoleOutput;

use Symfony\Component\Console\Input\ArgvInput;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;

use Symfony\Component\Debug\Debug;
use Symfony\Component\Filesystem\Filesystem;
use Symfony\Component\Console\Style\SymfonyStyle;

use Symfony\Component\Finder\Finder;
use Symfony\Component\Finder\SplFileInfo;

set_time_limit(0);

require __DIR__ . "/vendor/autoload.php";

Debug::enable();

$input = new ArgvInput;
$command = new Command('renamer');
$command->setDescription('Rename a bunch of anime files to conform plex\'s crap');

$command
    ->addArgument('path', InputArgument::REQUIRED, 'Path to scan')
    ->addArgument('pattern', InputArgument::REQUIRED, 'Pattern to scan. There should be a `?P<episode>` at least in it.')
    ->addArgument('season', InputArgument::REQUIRED, 'Season to add (will prepend S%dE%d')
;

$command
    ->addOption('dry-run', null, InputOption::VALUE_NONE, 'Do not do the actual renaming')
    ->addOption('start-from', null, InputOption::VALUE_REQUIRED, 'Start the count from a certain number', 0)
;

$command->setCode(function (InputInterface $input, ConsoleOutput $output) {
    $path = $input->getArgument('path');
    $pattern = $input->getArgument('pattern');
    $season = $input->getArgument('season');

    $progressSection = $output->section();
    $messagesSection = $output->section();

    $io = new SymfonyStyle($input, $messagesSection);

    if (!strpos($pattern, '?P<episode>')) {
        throw new \RuntimeException('Must have a episode match');
    }

    $finder = new Finder;

    $finder
        ->files()
        ->sortByName()
    ;

    $finder
        ->in($path)
        ->name("/{$pattern}/")
        ->depth(0);
    ;

    $filesystem = new Filesystem;

    $progress = new ProgressBar($progressSection);
    $progress->start(count($finder));

    $i = 0;

    /** @var SplFileInfo $file */
    foreach ($finder as $file) {
        preg_match("{{$input->getArgument('pattern')}}", $file->getBasename(), $matches);

        $episode = intval($matches['episode']) - intval($input->getOption('start-from'));
        $name = "S{$season}E{$episode} (E{$matches['episode']}).{$file->getExtension()}";

        if (!$input->getOption('dry-run')) {
            $filesystem->rename($file->getPathname(), "{$file->getPath()}/{$name}");
        }

        if ($i > 0 && $i % 5 === 0) {
            $messagesSection->clear(5);
        }

        ++$i;

        $io->comment("Renaming {$file->getBasename()} to {$name}");
        $progress->advance();
    }

    $progress->finish();
});

$application = new Application;
$application->add($command);
$application->setDefaultCommand($command->getName(), true);
$application->run();