+
+if [[ -z "$ARVADOS_BUILDING_VERSION" ]] && ! [[ -z "$version_tag" ]]; then
+ export ARVADOS_BUILDING_VERSION="$version_tag"
+ export ARVADOS_BUILDING_ITERATION="1"
+fi
+
+# This defines python_sdk_version and cwl_runner_version with python-style
+# package suffixes (.dev/rc)
+calculate_python_sdk_cwl_package_versions
+
+if [[ -z "$cwl_runner_version" ]]; then
+ echo "ERROR: cwl_runner_version is empty";
+ exit 1
+fi
+
+echo cwl_runner_version $cwl_runner_version python_sdk_version $python_sdk_version
+
+# For development and release candidate packages, the OS package has a "~dev"
+# or "~rc" suffix, but Python requires a ".dev" or "rc" suffix.
+#
+# Arvados-cwl-runner will be expecting the Python-compatible version string
+# when it tries to pull the Docker image, so we use that to tag the Docker
+# image.
+#
+# The --build-arg docker invocation arguments are expecting the OS package
+# version.
+python_sdk_version_os=$(echo -n $python_sdk_version | sed s/.dev/~dev/g | sed s/rc/~rc/g)
+cwl_runner_version_os=$(echo -n $cwl_runner_version | sed s/.dev/~dev/g | sed s/rc/~rc/g)
+
+if [[ "${python_sdk_version}" != "${ARVADOS_BUILDING_VERSION}" ]]; then
+ python_sdk_version_os="${python_sdk_version_os}-1"
+else
+ python_sdk_version_os="${ARVADOS_BUILDING_VERSION}-${ARVADOS_BUILDING_ITERATION}"
+fi
+
+if [[ "${cwl_runner_version_os}" != "${ARVADOS_BUILDING_VERSION}" ]]; then
+ cwl_runner_version_os="${cwl_runner_version_os}-1"
+else
+ cwl_runner_version_os="${ARVADOS_BUILDING_VERSION}-${ARVADOS_BUILDING_ITERATION}"
+fi
+