Files installed to CATKIN_PACKAGE_SHARE_DESTINATION do not appear in devel/share

I specify additional resources to install:

install(
        DIRECTORY resources/
        DESTINATION ${CATKIN_PACKAGE_SHARE_DESTINATION}/resources )

They do appear in share/my_pkg/resources when I install the package. They don’t, however, appear in the devel space during development. That is, devel/share/mypkg does not contain resources.

How to go about this? I would like to access these resources in a predictable way both during development and after installation.

Edit after comment:

An executable my_node needs some binary resource files during run-time. I have these files in a /resources directory under my package root. I specified the install(...) command above to have them installed. During development, I would like to use these resources too. So it would be wonderful to have a method getResourcesDir() that would return me the path to the corresponding folder. That is, /opt/ros/melodic/share/my_pkg/resources or $SOURCE_PATH/my_pkg/resources, depending on whether the pkg is installed or not.

[dirk-thomas]

If you have asked your question on answers.ros.org please feel free to add a link to the question to this ticket so that future readers can find the related question.

See https://answers.ros.org/question/354779/locate-catkin_package_share_destination-in-devel-space/

[dirk-thomas]

I think it’s inconsistent that not all resources are copied to the devel space.

I answered this specific aspect above: Files are intentionally not being copied into the devel space. That is the whole point of it - being able to iterate on source files and immediately using them - without the need to run a build.

The issue is that during development the layout of files is different from the layout after installation.

You can layout the source space in a way that it is possible to make the lookup the from devel space as well as install space the same.

If the resources are in the root of your source space I would expect them to be installed to share/<pkgname> and in that case the location relative to the package.xml file is the same.