DOCKER_GID
      IMG
      IMAGE_NAME
      IMAGE_VERSION
      REPO_ROOT
      BUILD_WITH_CONTAINER
)

# For non container build, we need to write env to file
if [[ "${1}" == "envfile" ]]; then
  # ! does a variable-variable https://stackoverflow.com/a/10757531/374797
  for var in "${VARS[@]}"; do
    echo "${var}"="${!var}"
  done
else
  for var in "${VARS[@]}"; do

type ResyncTarget struct {
	Arn       string    `json:"arn"`
	ResetID   string    `json:"resetid"`
	StartTime time.Time `json:"startTime"`
	EndTime   time.Time `json:"endTime"`
	// Status of resync operation
	ResyncStatus string `json:"resyncStatus,omitempty"`
	// Completed size in bytes
	ReplicatedSize int64 `json:"completedReplicationSize"`
	// Failed size in bytes

		// Attempt to use splice/sendfile() optimization, A very specific behavior mentioned below is necessary.
		// See https://github.com/golang/go/blob/f7c5cbb82087c55aa82081e931e0142783700ce8/src/net/sendfile_linux.go#L20
		// Windows can lock up with this optimization, so we fall back to regular copy.
		sr, ok := rc.(*sendFileReader)
		if ok {
			// Sendfile sends in 4MiB chunks per sendfile syscall which is more than enough