Catkin and system dependencies: build- versus run-time?

edit

Indeed, though I'm really looking to obtain this information given the source of a ROS package. How does bloom extract the run-time dependencies from the package such that the Debian package depends upon them and not the build-time dependencies?

Fly-by a few years later: there is a PR to allow requesting rosdep a specific type of dependency https://github.com/ros-infrastructure..., not sure if it supports format 2 and 3 though. In ROS2 there's also ros2 pkg xml but it like the previous PR it just gives you the straight xml tags and doesnt do logic like "you asked for all runtime dependencies, <depend> means build and runtime dependency so I'll print those too". So no complete solution yet but some intermediary ones available

Yeah really the best tool I've found for this these days is just using catkin_pkg directly (which is how bloom works). Sadly I learned that too late for the project for which I wanted this answer, but I'll go back and fix it at some point.