Why symfony 2 uses both, the 'deps' file and the 'composer.json' file?

Question

Why symfony 2 uses both, the deps file and the composer.json file?

I can see some documents tell me to:

php bin/vendors install         


        

Answer 1

The deps file and bin/vendors script are used in Symfony 2.0.x, while Symfony 2.1.x has switched to Composer. The bin/vendors script was just a stub because Composer was not ready for production when Symfony 2.0.0 was released.