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One-liner to find path to ROS stack or package

asked 2014-02-10 04:40:44 -0500

bchr gravatar image

updated 2014-02-10 04:41:36 -0500

I was wondering if there was a clean way to find the path to a given ROS stack or package from the command line on Hydro, whether it is installed or just in the ROS_PACKAGE_PATH, i.e. what is probably used by roscd or roslaunch with the $(find ros_stack) arguments.

If I try to find an uninstalled ROS stack with rospack find ros_stack, it fails, whereas rosstack find ros_stack succeeds. For now I use this trick which works for both packages and stacks, whether they are installed or just present in ROS_PACKAGE_PATH:

$ ros_stack_path=`roscd ros_stack && pwd && cd - &>/dev/null`

Is there a better one-liner for this?

I also noticed something surprising. If I try both rospack and rosstack on a metapackage (e.g. navigation):

$ rospack  find navigation             ---> fails
$ rosstack find navigation             ---> succeeds

Is that the expected behavior?

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answered 2014-02-10 08:56:17 -0500

Ed Venator gravatar image
rosstack find pkg_name 2>/dev/null || rospack find pkg_name

This can also be defined as a Bash function

  rosstack $@ 2>/dev/null || rospack $@

and used like

rosstack_pack find pkg_name

Further magic would be required for autocompletion to work.

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I guess this is the most direct way to go. Thanks!

bchr gravatar image bchr  ( 2014-02-11 04:23:07 -0500 )edit

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Asked: 2014-02-10 04:40:44 -0500

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Last updated: Feb 10 '14