mirror of https://github.com/docker/cli.git
68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
package container
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
|
|
"github.com/docker/cli/cli"
|
|
"github.com/docker/cli/cli/command"
|
|
"github.com/docker/cli/cli/command/completion"
|
|
"github.com/pkg/errors"
|
|
"github.com/spf13/cobra"
|
|
)
|
|
|
|
type exportOptions struct {
|
|
container string
|
|
output string
|
|
}
|
|
|
|
// NewExportCommand creates a new `docker export` command
|
|
func NewExportCommand(dockerCli command.Cli) *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(cmd.Context(), dockerCli, opts)
|
|
},
|
|
Annotations: map[string]string{
|
|
"aliases": "docker container export, docker export",
|
|
},
|
|
ValidArgsFunction: completion.ContainerNames(dockerCli, true),
|
|
}
|
|
|
|
flags := cmd.Flags()
|
|
|
|
flags.StringVarP(&opts.output, "output", "o", "", "Write to a file, instead of STDOUT")
|
|
|
|
return cmd
|
|
}
|
|
|
|
func runExport(ctx context.Context, dockerCli command.Cli, opts exportOptions) error {
|
|
if opts.output == "" && dockerCli.Out().IsTerminal() {
|
|
return errors.New("cowardly refusing to save to a terminal. Use the -o flag or redirect")
|
|
}
|
|
|
|
if err := command.ValidateOutputPath(opts.output); err != nil {
|
|
return errors.Wrap(err, "failed to export container")
|
|
}
|
|
|
|
clnt := dockerCli.Client()
|
|
|
|
responseBody, err := clnt.ContainerExport(ctx, opts.container)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer responseBody.Close()
|
|
|
|
if opts.output == "" {
|
|
_, err := io.Copy(dockerCli.Out(), responseBody)
|
|
return err
|
|
}
|
|
|
|
return command.CopyToFile(opts.output, responseBody)
|
|
}
|