[5.8] Allow lock to be configured in local filesystems

[sebdesign]

The Local adapter from Flysystem uses a lock for read/writes by default, but it allows this parameter to be changed in the constructor: https://flysystem.thephpleague.com/docs/adapter/local/

This commit allows developers to change this behavior in the filesystems.php configuration, because currently LOCK_EX is hardcoded:

'local' => [
    'driver' => 'local',
    'root' => storage_path('app'),
    'lock' => 0,
],

[reindert-vetter]

Yes, yes and yes!!! 🎉

I had to make a ServiceProvider to get this done. Here you have my code for a (temporary) fix.

<?php declare(strict_types=1);

namespace App\Providers;

use Illuminate\Filesystem\FilesystemAdapter;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\ServiceProvider;
use League\Flysystem\Adapter\Local as LocalAdapter;
use League\Flysystem\Filesystem;

class LocalStorageServiceProvider extends ServiceProvider
{
    public function boot()
    {
        Storage::extend('local', function ($app, $config) {
            $permissions = $config['permissions'] ?? [];

            $links = ($config['links'] ?? null) === 'skip'
                ? LocalAdapter::SKIP_LINKS
                : LocalAdapter::DISALLOW_LINKS;

            $adapter = new LocalAdapter($config['root'], 0, $links, $permissions);
            return new FilesystemAdapter($this->createFlysystem($adapter, $config));
        });
    }

    public function register()
    {
        //
    }

    protected function createFlysystem(\League\Flysystem\AdapterInterface $adapter, array $config)
    {
        $config = Arr::only($config, ['visibility', 'disable_asserts', 'url']);

        return new Filesystem($adapter, count($config) > 0 ? $config : null);
    }
}

Add App\Providers\LocalStorageServiceProvider::class, to 'providers' => [] in config/app.php