Error in 'php artisan koel:sync' because '/covers' subdirectory of 'public/img/' is not created by default

[nitePhyyre]

Hi,

I had a fresh install of 3.6.0.
In file app/Models/Album.php:

public function copyCoverFile($srcPath)
{
    $extension = pathinfo($srcPath, PATHINFO_EXTENSION);
    $destPath = $this->generateRandomCoverPath($extension);
    copy($srcPath, $destPath);
    $this->update(['cover' => basename($destPath)]);
}

private function generateRandomCoverPath($extension)
{
    return app()->publicPath().'/public/img/covers/'.uniqid('', true).".$extension";
}

The line copy($srcPath, $destPath); is causing the following error:
[ErrorException] copy(/var/www/public/img/covers/58eeea295471a5.02522229.jpg): failed to open stream: No such file or directory

Because while app()->publicPath().'/public/img/' existed on the new install. The /covers subdirectory didn't. Creating the directory allowed me to run the import.

[etbusch]

Also encountered this bug