When building the spot_driver package, the spot_ros2 and spot_alerts scripts are not symlinked, because the RENAME option in install forces it to be copied. This means that making changes to these scripts requires running the build again to update the code.

install(
  PROGRAMS
  spot_driver/spot_ros2.py
  DESTINATION lib/${PROJECT_NAME}
  RENAME spot_ros2
  )

I think it should be possible to make this a symlink instead, but likely needs to check whether the --symlink-install flag is specified for colcon.

The symlink option is set as -DAMENT_CMAKE_SYMLINK_INSTALL=1, so is accessible in CMakeLists with ${AMENT_CMAKE_SYMLINK_INSTALL}.

https://github.com/colcon/colcon-ros/blob/65ac2ec65c5704aa9a4d9fffdd20de4389a45e1b/colcon_ros/task/ament_cmake/build.py#L50-L53