| package container |
| |
| import ( |
| "errors" |
| "io" |
| |
| "golang.org/x/net/context" |
| |
| "github.com/docker/docker/api/client" |
| "github.com/docker/docker/cli" |
| "github.com/spf13/cobra" |
| ) |
| |
| type exportOptions struct { |
| container string |
| output string |
| } |
| |
| // NewExportCommand creates a new `docker export` command |
| func NewExportCommand(dockerCli *client.DockerCli) *cobra.Command { |
| var opts exportOptions |
| |
| cmd := &cobra.Command{ |
| Use: "export [OPTIONS] CONTAINER", |
| Short: "Export a container's filesystem as a tar archive", |
| Args: cli.ExactArgs(1), |
| RunE: func(cmd *cobra.Command, args []string) error { |
| opts.container = args[0] |
| return runExport(dockerCli, opts) |
| }, |
| } |
| |
| flags := cmd.Flags() |
| |
| flags.StringVarP(&opts.output, "output", "o", "", "Write to a file, instead of STDOUT") |
| |
| return cmd |
| } |
| |
| func runExport(dockerCli *client.DockerCli, opts exportOptions) error { |
| if opts.output == "" && dockerCli.IsTerminalOut() { |
| return errors.New("Cowardly refusing to save to a terminal. Use the -o flag or redirect.") |
| } |
| |
| clnt := dockerCli.Client() |
| |
| responseBody, err := clnt.ContainerExport(context.Background(), opts.container) |
| if err != nil { |
| return err |
| } |
| defer responseBody.Close() |
| |
| if opts.output == "" { |
| _, err := io.Copy(dockerCli.Out(), responseBody) |
| return err |
| } |
| |
| return client.CopyToFile(opts.output, responseBody) |
| } |