Generate srvs from directory using catkin build

edit

For srv generation, I've taken to using add_service_files(DIRECTORY srv) instead of listing each file individually, since it's more compact and I don't ever put srvs in that directory that I don't want generated.

However, one downside is, since you don't have to edit the CMakeLists.txt file when you add a new srv to that directory, it doesn't generate them unless I do a catkin clean or I make some edit to CMakeLists.txt.

What I want to know, is there a way to force it to generate the srvs with a catkin build without having to do a clean, and without making bogus edits to CMakeLists.txt?