#!/usr/bin/env bash

. $(dirname $0)/util

: ${TARGETPLATFORM=}
: ${CONTINUOUS_INTEGRATION=}

set -ex

progressFlag=""
if [ "$CONTINUOUS_INTEGRATION" == "true" ]; then progressFlag="--progress=plain"; fi

buildkitdTagsFlags=""
if [ -n "$BUILDKITD_TAGS" ]; then
  buildkitdTagsFlags="--opt build-arg:BUILDKITD_TAGS=\"$BUILDKITD_TAGS\""
fi

binariesDocker() {
  mkdir -p bin/tmp
  export DOCKER_BUILDKIT=1
  iidfile=$(mktemp -t docker-iidfile.XXXXXXXXXX)
  target=$(echo "$TARGETPLATFORM" | cut -d"/" -f1)
  if [ -z "$target" ]; then
    target="linux"
  fi

  docker build $platformFlag --build-arg BUILDKITD_TAGS="${BUILDKITD_TAGS}" --target binaries-$target --iidfile $iidfile --force-rm .
  iid=$(cat $iidfile)
  containerID=$(docker create $iid copy)
  docker cp $containerID:/ bin/tmp
  mv bin/tmp/build* bin/
  rm -rf bin/tmp
  docker rm $containerID
  docker rmi -f $iid
  rm -f $iidfile
}

binaries() {
  platformFlag=""
  if [ ! -z "$TARGETPLATFORM" ]; then
    platformFlag="--opt platform=$TARGETPLATFORM"
  fi
  buildctl build $progressFlag --frontend=dockerfile.v0 \
    --local context=. --local dockerfile=. \
    $buildkitdTagsFlags --opt target=binaries $platformFlag \
    --output type=local,dest=./bin/
}

case $buildmode in
"buildkit")
  binaries
  ;;
"docker-buildkit")
  binariesDocker
  ;;
*)
  echo "Unsupported build mode: $buildmode" >&2
  exit 1
  ;;
esac