#!/usr/bin/env bash

. $(dirname $0)/util
set -eu -o pipefail -x

: ${CONTINUOUS_INTEGRATION=}

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

gogo_version=$(awk '$1 == "github.com/gogo/protobuf" { print $2 }' go.mod)
case $buildmode in
"buildkit")
  output=$(mktemp -d -t buildctl-output.XXXXXXXXXX)
  buildctl build $progressFlag --frontend=dockerfile.v0 --local context=. --local dockerfile=. \
    --opt build-arg:GOGO_VERSION=$gogo_version \
    --opt target=update \
    --opt filename=./hack/dockerfiles/generated-files.Dockerfile \
    --output type=local,dest=$output
  cp -R "$output/generated-files/" .
  rm -rf $output
  ;;
"docker-buildkit")
  iidfile=$(mktemp -t docker-iidfile.XXXXXXXXXX)
  export DOCKER_BUILDKIT=1
  docker build --build-arg GOGO_VERSION=$gogo_version --iidfile $iidfile -f ./hack/dockerfiles/generated-files.Dockerfile --target update --force-rm .
  iid=$(cat $iidfile)
  cid=$(docker create $iid noop)

  docker export $cid | tar -xf - --strip-components=1 generated-files

  docker rm $cid

  rm -f $iidfile
  ;;
*)
  echo "Unsupported build mode: $buildmode" >&2
  exit 1
  ;;
esac