Function runExport

cli/command/container/export.go:48–72

(ctx context.Context, dockerCLI command.Cli, opts exportOptions)

}

func runExport(ctx context.Context, dockerCLI command.Cli, opts exportOptions) error {
	var output io.Writer
	if opts.output == "" {
		if dockerCLI.Out().IsTerminal() {
			return errors.New("cowardly refusing to save to a terminal. Use the -o flag or redirect")
		}
		output = dockerCLI.Out()
	} else {
		writer, err := atomicwriter.New(opts.output, 0o600)
		if err != nil {
			return fmt.Errorf("failed to export container: %w", err)
		}
		defer writer.Close()
		output = writer
	}

	responseBody, err := dockerCLI.Client().ContainerExport(ctx, opts.container, client.ContainerExportOptions{})
	if err != nil {
		return err
	}
	defer responseBody.Close()

	_, err = io.Copy(output, responseBody)
	return err
}