Nested eval in ROS2 XML launch file
I am trying to find out if it's possible to load a parameter file in an XML launch file, where the path is computed from an arg. This requires nested (or chained) evals:
- The arg has the name of a robot
- Adding a suffix to that gives the name of the package that has the parameter file
- Then we need to call find-pkg-share
- And add another string to get the full file path
Is this possible? What would go into <param from="...">
?