Bolt Thumbs is installed as a default dependency of Bolt. However, for use independently it can be included in your Composer project:
composer require bolt/thumbs:^3.4Should you want to work with the development branch(es), you can specficy those as Composer requirements instead.
To install the 3.x development branch:
composer require bolt/thumbs:dev-3.x@devAlternatively to install the master branch (which requires Silex 2):
composer require bolt/thumbs:dev-master@devIf you've already got a working installation of Bolt, you can safely skip this.
To use the Botl Thumbs service provider onto your Silex based application,
simply ->register() the \Bolt\Provider\ThumbnailsServiceProvider class in
your registration phase, e.g.:
/** @var \Silex\Application $app */
$app->register(new \Bolt\Provider\ThumbnailsServiceProvider())