Thanks for the idea @User, following your example, will it respect a default parameter file for each app?

conf/
├── app1/
│   ├── parameters.yml
│   ├── local/
│   │   └── catalog.yml
│   └── vm/
│       ├── catalog.yml
└── app2

will it read the

conf/app1/parameters.yml

if passed

--env="app1/local"

?