Kernel

By default, symfony does not track the current working directory. Since we want to use this information to locate certain resources, such as the configuration files, we add a new method in the kernel that can be used as an expression to be passed to service definitions.

For example:

    phpDocumentor\Configuration\ConfigurationFactory:
      arguments:
        $defaultFiles:
          - "@=service('kernel').getWorkingDir() ~ '/phpdoc.xml'"
          - "@=service('kernel').getWorkingDir() ~ '/phpdoc.dist.xml'"
          - "@=service('kernel').getWorkingDir() ~ '/phpdoc.xml.dist'"

I am not quite sure why, but without this overridden method Symfony will use the 'src' directory as Project Dir when phpDocumentor is installed using Composer. Without being installed with composer it works fine without this hack.