#!/bin/bash
set -exuo pipefail

export ONBUILD=${DOCKER_REPO}-onbuild
# push ONBUILD image
docker push $ONBUILD:$DOCKER_TAG

function get_hub_version() {
  rm -f hub_version
  docker run --rm -v $PWD:/version -u $(id -u) -i $DOCKER_REPO:$DOCKER_TAG sh -c 'jupyterhub --version > /version/hub_version'
  hub_xyz=$(cat hub_version)
  split=( ${hub_xyz//./ } )
  hub_xy="${split[0]}.${split[1]}"
  # add .dev on hub_xy so it's 1.0.dev
  if [[ ! -z "${split[3]:-}" ]]; then
    hub_xy="${hub_xy}.${split[3]}"
    latest=0
  else
    latest=1
  fi
}


get_hub_version

# when building master, push 0.9.0.dev as well
docker tag $DOCKER_REPO:$DOCKER_TAG $DOCKER_REPO:$hub_xyz
docker push $DOCKER_REPO:$hub_xyz
docker tag $ONBUILD:$DOCKER_TAG $ONBUILD:$hub_xyz
docker push $ONBUILD:$hub_xyz

# when building 0.9.x, push 0.9 as well
docker tag $DOCKER_REPO:$DOCKER_TAG $DOCKER_REPO:$hub_xy
docker push $DOCKER_REPO:$hub_xy
docker tag $ONBUILD:$DOCKER_TAG $ONBUILD:$hub_xy
docker push $ONBUILD:$hub_xyz

# if building a stable release, tag latest as well
if [[ "$latest" == "1" ]]; then
  docker tag $DOCKER_REPO:$DOCKER_TAG $DOCKER_REPO:latest
  docker push $DOCKER_REPO:latest
  docker tag $ONBUILD:$DOCKER_TAG $ONBUILD:latest
  docker push $ONBUILD:latest
fi