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I'm interested in auto-generating some files before the start of my ROS run. The files will depend on real-time data available at the start of the run. Is there a nice way to include this in my lanch file ? Like some tag which funs an executable or python script before loading up the ROS modules?
As noted in the roslaunch documentation, there are no guarantees on the order that nodes/scripts in launch files are started in. The easiest way to do what you want might be to write a short shell script that first runs the scripts for generating your data and then calls the required ROS launch file afterwards.
/edit To raise awareness for the "hacky way" @dornhege suggests below in comments. An example (creating a folder) is available here.
This sounds like a good solution. There is one slightly hacky way to do this: The param tag allows you to use the output of a command as a parameter. You can create a dummy parameter that just calls your program. Parameters are guaranteed to be set before the launch is started.
Asked: 2015-11-04 06:29:33 -0500
Seen: 336 times
Last updated: Nov 06 '15
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