#!/bin/bash

set -e 

base_tag=$REGISTRY/$SERVICE
tag="$base_tag:${COMMIT_SHA:0:10}"
latest_tag="$base_tag:latest"

if [[ -n $DEBUG ]] 
then
  echo "debug:"
  echo "  REGISTRY: $REGISTRY"
  echo "  SERVICE: $SERVICE"
  echo "  COMMIT_SHA: $COMMIT_SHA"
  echo "  TMP: $TMP"
fi

echo "docker: logging in"
docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD

export DOCKER_BUILDKIT=1

function pull_target {
  target=$1
  echo "pulling $target"
  latest_target_tag="$base_tag-$target:latest"

  docker pull $latest_target_tag
}

function build_target {
  target=$1
  echo "building $target"
  latest_target_tag="$base_tag-$target:latest"

  docker build \
    --target "$target" \
    --tag "$latest_target_tag" \
    --build-arg BUILDKIT_INLINE_CACHE=1 \
    --cache-from $latest_target_tag \
    --file "$TMP/build_release.Dockerfile" .
}

pull_target "deps" &
pull_target "builder" &
wait

build_target "deps"
build_target "builder"

docker build \
  -t "$tag" \
  --cache-from "$base_tag-deps:latest" \
  --cache-from "$base_tag-builder:latest" \
  --build-arg BUILDKIT_INLINE_CACHE=1 \
  --cache-from $latest_tag \
  -f "$TMP/build_release.Dockerfile" .
docker tag "$tag" "$latest_tag"