buildkit/hack/update-generated-files

#!/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