if command -v wget > /dev/null; then
    DOWNLOAD_COMMAND="wget -qO -"
    return
  fi
  echo wget is not installed.

  echo Error: curl is not installed or does not support https, wget is not installed. \
       Cannot download envoy. Please install wget or add support of https to curl.
  exit 1
}

# Downloads and extract an Envoy binary if the artifact doesn't already exist.
# Params:

      else
        script --flush --quiet --return "${tmpFile}" --command "${*}"
      fi
    else
      # if we aren't a TTY, run directly as script will always run with a tty, which may output content that
      # we cannot display
      set -o pipefail; "$@" 2>&1 | tee "${tmpFile}"
    fi
    # shellcheck disable=SC2181
    if [[ $? == 0 ]]; then
      break
    fi
    if ! grep -Eq "${failureRegex}" "${tmpFile}"; then

  if command -v wget > /dev/null; then
    DOWNLOAD_COMMAND="wget -qO -"
    return
  fi
  echo wget is not installed.

  echo Error: curl is not installed or does not support https, wget is not installed. \
       Cannot download envoy. Please install wget or add support of https to curl.
  exit 1
}

# Params:
#   $1: The URL of the ztunnel binary to be downloaded.
#   $2: The full path of the output binary.

    if [[ "${fn}" == *.go || "${fn}" == *.rs ]]; then
      newfile=$(cat "${WD}/copyright-banner-go.txt" "${fn}")
      echo "${newfile}" > "${fn}"
      echo "Fixing license: ${fn}"
    else
      echo "Cannot fix license: ${fn}. Unknown file type"
    fi
  fi