New in symfony 2.3 the composer install script also copies the parameters.yml.dist file contents into the parameters.yml file, explain
This is the correct solution in my opinion:
"incenteev-parameters": {
"file": "app/config/parameters.yml",
"keep-outdated": true
},
It was mentioned in this github issue https://github.com/symfony/symfony-standard/issues/642 as well as in the github documentation for incenteev-parameters https://github.com/Incenteev/ParameterHandler