use roslaunch >= 1.12.1 for roslaunch-check launch/face_detection.launch

.travis.sh

@@ -112,7 +112,8 @@ rosdep update
     if [ "$OPENCV_VERSION" == 3 ]; then rosinstall_generator image_pipeline --upstream >> .rosinstall.opencv3; fi # need to recompile image_proc
     if [ "$OPENCV_VERSION" == 3 ]; then rosinstall_generator compressed_image_transport --upstream >> .rosinstall.opencv3; fi # need to recompile compressed_image_transport
     if [ "$OPENCV_VERSION" == 3 ]; then rosinstall_generator vision_opencv --upstream >> .rosinstall.opencv3; fi # need to recompile visoin_opencv
-    if [ "$OPENCV_VERSION" == 3 ]; then wstool merge .rosinstall.opencv3 || [ ! -s .rosinstall.opencv3 ] || vcs import . < .rosinstall.opencv3 ; fi # need to recompile visoin_opencv
+    if [ "$ROS_DISTRO" == "indigo" ]; then ROS_DISTRO=kinetic rosinstall_generator roslaunch >> .rosinstall.opencv3; fi # face_detection.launch requires roslaunch-check >= 1.12.1
+    if [[ "$OPENCV_VERSION" == 3 || "$ROS_DISTRO" == "indigo" ]]; then wstool merge .rosinstall.opencv3 || [ ! -s .rosinstall.opencv3 ] || vcs import . < .rosinstall.opencv3 ; fi # need to recompile visoin_opencv
     git config --global --add safe.directory $CI_SOURCE_PATH
     git config --global --add safe.directory ~/catkin_ws/src || echo "OK"
     wstool up || vcs pull

launch/face_detection.launch

@@ -30,6 +30,7 @@
        name="eyes_cascade_name" default="/usr/share/opencv4/haarcascades/haarcascade_eye_tree_eyeglasses.xml" doc="Eye dtection cascade Filename" />
 
   <!-- if all use_opencv3 is true, but all other variable is false, then use /usr/share/opencv -->
+  <!-- eval requires roslaunch >= 1.12.1 -->
   <arg if="$(eval use_opencv3 and not use_opencv3_1 and not use_opencv3_2 and not use_opencv3_3 and not use_opencv4)"
        name="face_cascade_name" default="/usr/share/opencv/haarcascades/haarcascade_frontalface_alt.xml" doc="Face dtection cascade Filename" />
   <arg if="$(eval use_opencv3 and not use_opencv3_1 and not use_opencv3_2 and not use_opencv3_3 and not use_opencv4)"