}

	// Update file permission so that cni plugin has permission to access it.
	if _, err := os.Stat(path); err != nil {
		return nil, fmt.Errorf("cni listener file %q doesn't exist", path)
	}
	if err := os.Chmod(path, 0o666); err != nil {
		return nil, fmt.Errorf("failed to update %q permission", path)
	}

	return listener, nil

export GO111MODULE=on
go get -u "istio.io/api@${UPDATE_BRANCH}"
go get -u "istio.io/client-go@${UPDATE_BRANCH}"
go mod tidy

sed -i "s/^BUILDER_SHA=.*\$/BUILDER_SHA=$(getSha release-builder)/" prow/release-commit.sh
chmod +x prow/release-commit.sh

    echo "Downloading ${SIDECAR}: $1 to $2"
    time ${DOWNLOAD_COMMAND} --header "${AUTH_HEADER:-}" "$1" |\
      tar --extract --gzip --strip-components=3 --to-stdout > "$2"
    chmod +x "$2"

    # Make a copy named just "envoy" in the same directory (overwrite if necessary).
    echo "Copying $2 to $(dirname "$2")/${3}"
    cp -f "$2" "$(dirname "$2")/${3}"
    popd
  fi
}

  mkdir -p "$(dirname "$2")"
  pushd "$(dirname "$2")"

  # Download and make the binary executable
  echo "Downloading ztunnel: $1 to $2"
  time ${DOWNLOAD_COMMAND} --header "${AUTH_HEADER:-}" "$1" > "$2"
  chmod +x "$2"

  # Make a copy named just "ztunnel" in the same directory (overwrite if necessary).
  echo "Copying $2 to $(dirname "$2")/${3}"
  cp -f "$2" "$(dirname "$2")/${3}"
  popd