Could you share how you set up Carla?

[KaminariOS]

What is WORK_BASE_DIR?

In ScenarioGeneration/Apptainer/scripts.sh

# dependent variables
CarlaUnreal=${WORK_BASE_DIR}/${BASE_IMAGE_DIST}/CarlaUnreal
CARLA_SRC=${WORK_BASE_DIR}/${BASE_IMAGE_DIST}/carla
CARLA_DIST=${WORK_BASE_DIR}/${BASE_IMAGE_DIST}/carla/Dist/CARLA_${CARLA_BUILD_CONFIG}_${CARLA_BUILD_NUMBER}/LinuxNoEditor
CARLA_BINARY=CarlaUE4-Linux-${CARLA_BUILD_CONFIG}
SCENARIOGEN_DEPENDENCIES=${STORE_BASE_DIR}

[abol-karimi]

WORK_BASE_DIR is just a custom path on Longleaf under the /work partition where I keep the programs that I want to run fast. I set the WORK_BASE_DIR environment variable in my .bashrc so that my Longleaf username is not revealed in the repo in a hardcoded path.

[KaminariOS]

I tried to follow the Carla doc to set up things but it is outdated: https://carla.readthedocs.io/en/latest/build_linux/
The unreal engine repo no longer exists: git clone --depth 1 -b carla https://github.com/CarlaUnreal/UnrealEngine.git ~/UnrealEngine_4.26

Edit: found the repo by carla-simulator/carla#4802

[KaminariOS]

I still can figure out how you set up this:

CARLA_DIST=${WORK_BASE_DIR}/${BASE_IMAGE_DIST}/carla/Dist/CARLA_${CARLA_BUILD_CONFIG}_${CARLA_BUILD_NUMBER}/LinuxNoEditor

Where did you download it? Or did you build it yourself?

And is CarlaUnreal=${WORK_BASE_DIR}/${BASE_IMAGE_DIST}/CarlaUnreal from git clone --depth 1 -b carla https://github.com/CarlaUnreal/UnrealEngine.git?

[abol-karimi]

WORK_BASE_DIR is the Longleaf path under the /work/ partition corresponding to my user account. Since I was experimenting with different version of linux as the base image for my Apptainer container, I made separate folders and set the BASE_IMAGE_DIST environment variable so that the script can find it. Note that I mount the CarlaUnreal folder into the container rather than copy the files into the image. So for different container images I need different copies of the source folder so that the builds don't get mixed up when I compile Carla's source from different images that are based on different versions of linux.

[KaminariOS]

Thank you for the explanation.

I understood those env variables.

What I don't understand is the LinuxNoEditor thing. I don't know how to get this LinuxNoEditor.

So you compiled Unreal on LongLeaf and mount it to the container?