This should be built from the root of the repository as follows:
# apptainer build scif.sif docs/examples/exit-from-run/apptainer.def
The force_fail app returns exit code 155
$ apptainer run scif.sif run force_fail ; echo "Exit Code: $?";
[force_fail] executing /bin/bash /scif/apps/force_fail/scif/runscript
Calling exit 155
ERROR Return code 155
Exit Code: 155
The 'success' app returns exit code 0
$ apptainer run scif.sif run success ; echo "Exit Code: $?";
[success] executing /bin/bash /scif/apps/success/scif/runscript
Running successfully
Exit Code: 0