mutlistage-cache-ci.sh

image='dckr.myrepo.com/my-org/my-app'
stage0=$image':stage0'
latest=$image':latest'
# Pull to bring docker images to the docker cache.
docker pull $stage0 || true # ||true saves from failure when image has never been published
docker pull $latest || true 
# This generates Dockerfile and artifacts
sbt docker:stage

docker build \
      --target stage0 \ # build only itermediate image
      --cache-from $stage0 \ # using cache downloaded from remote repository
      --tag $stage0 "target/docker/stage/"

sbt docker:publishLocal # build final image defined in https://gist.github.com/ppiotrow/e6f3aae9368983579ed16a1f74fb0bbc
#Publish for the future cache hits.
docker push $stage0
docker push $latest 
#Publish for deployment.
docker push $image$(git describe --tags) # I only deploy immutable tags.