How to detect launch file validation failure in a script ?

edit

Hello,

I am trying to setup launch file validation within my repo's CI using roslaunch_add_file_check. My CMakeLists.txt looks like this :

cmake_minimum_required(VERSION 2.8.3)
project(package)

find_package(catkin REQUIRED)
catkin_package()

if (CATKIN_ENABLE_TESTING)
    find_package(roslaunch REQUIRED)
    find_package(rostest REQUIRED)
    roslaunch_add_file_check(launch)
endif (CATKIN_ENABLE_TESTING)

install(DIRECTORY
  config launch
DESTINATION ${CATKIN_PACKAGE_SHARE_DESTINATION})

I have some (expected) errors in my package when running the test with :

catkin_make --only-pkg-with-deps package
catkin_make run_tests_package

And the output is very clear :

Missing package dependencies: other_package/package.xml: robot_state_publisher (notify upstream maintainer)

But when I try to check the return code of the command with :

echo $?

I get : 0. Which means the command finished successfully. Which makes it very hard to detect the failure in a script. Is there a way to force cmake to return a non zero code when the test fail ?

Thanks !