jenkins remove old docker image

rmi.sh

# SERVICE is the docker-compose service name
OLD_IMAGE_ID=$(docker-compose images -q $SERVICE)
# CLEAN_UP_OLD_IMAGE is a jenkins boolean param
if [ "${CLEAN_UP_OLD_IMAGE}" == "true" ]; then
	echo -en "\n\nTrying to remove the old image used for ${SERVICE} (ID: ${OLD_IMAGE_ID})...\n"
	docker rmi ${OLD_IMAGE_ID} 2>/dev/null || echo -en "\nThis image is still in use and has NOT been removed.\n"
else
	echo -en "\nThe old image remains on disk (ID: ${OLD_IMAGE_ID})...\n"
fi