[Bug] Package build failure after grading submission

Course Support ROS2 Basics in 5 Days Humble (C++)
1

This is an error report.

Screenshot of the error

Error details

I am able to successfully build the service quiz packages (colcon build --packages-select services_quiz services_quiz_srv) when I refresh the course. Gradebot fails to build the packages when I submit the quiz, and after the failure, building the packages again with the same command fails. Before quiz submission, the packages/code build and work successfully, but the build fails once Gradebot runs.

Error message:
CMake Error at CMakeLists.txt:13 (find_package):
By not providing "Findservices_quiz_srv.cmake" in CMAKE_MODULE_PATH this
project has asked CMake to find a package configuration file provided by
"services_quiz_srv", but CMake did not find one.

Could not find a package configuration file provided by "services_quiz_srv"
with any of the following names:

services_quiz_srvConfig.cmake
services_quiz_srv-config.cmake

Add the installation prefix of "services_quiz_srv" to CMAKE_PREFIX_PATH or
set "services_quiz_srv_DIR" to a directory containing one of the above
files. If "services_quiz_srv" provides a separate development package or
SDK, be sure it has been installed.

3

This typically happens if any of your quiz packages depend on another package in the workspace (a situation that is not supported)

services_quiz must depend on services_quiz_srv, which must not depend on another package in the workspace.

You must be able to compile your quiz packages with --packages-select services_quiz services_quiz_srv any time.

The reason you saw this error after submitting is that gradebot does rm -rf build/ install/ log/, effectively clearing previous compilations, which might have “illegally assisted” your previous local runs to pass.