exit 1;;
esac
done
+shift $(expr $OPTIND - 1)
+if [ $# -eq 0 ]; then
+ RUN_COMMAND="/bin/bash"
+else
+ RUN_COMMAND="${@}"
+fi
which docker &>/dev/null || die "docker must be on the PATH."
die "failed to find a docker image named ${DOCKER_IMAGE_NAME}"
fi
-docker exec -it "${DOCKER_IMAGE_ID}" /bin/bash
+docker exec -it "${DOCKER_IMAGE_ID}" ${RUN_COMMAND}