Using custom namespaces with (C/S)ilex and Composer

For a new proof of concept application I'm building, I need both a simple web interface as well as some commandline tools. I decided to use Silex for the web interface and Cilex for the CLI tools, and opted for using Composer for installing these dependencies into my project. I ran into some issues with the custom project libraries I was building for this application however. Registering my custom namespace into Silex and Cilex didn't result in the classes being loaded for some reason. Composer helped me out though.

Aside from installing dependencies and creating an autoloader for those dependencies, Composer can also be the autoloader for your own custom code. Obviously, it's a matter of reading the F***** documentation, and as soon as Jordi told me Composer could actually do this, I quickly had stuff set up. All I needed to do was add an autoload entry to my composer.json file:

"autoload": {
    "psr-0": {"Foo": "lib"}
}

After that, you need to run composer.phar install to generate the new autoloader, and I'm all set. I can now load all libraries as long as they adhere to the PSR-0 naming standard (because I specified psr-0). If you don't use PSR-0, you could actually also use a classmap, as discussed in the documentation.