The build process requires several parts. To ease everything,
you can use Phing and run the provided build.xml file.
Simply install Phing and run it in the root directory. The result will be a
contao-manager.phar file in the root.
$ composer bin all install
$ composer run phing
If you want to test your changes and want to create a phar from
the files you have currently checked out, run
composer run phing debug.