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package client
import (
"errors"
"io"
"golang.org/x/net/context"
Cli "github.com/docker/docker/cli"
flag "github.com/docker/docker/pkg/mflag"
)
// CmdSave saves one or more images to a tar archive.
//
// The tar archive is written to STDOUT by default, or written to a file.
//
// Usage: docker save [OPTIONS] IMAGE [IMAGE...]
func (cli *DockerCli) CmdSave(args ...string) error {
cmd := Cli.Subcmd("save", []string{"IMAGE [IMAGE...]"}, Cli.DockerCommands["save"].Description+" (streamed to STDOUT by default)", true)
outfile := cmd.String([]string{"o", "-output"}, "", "Write to a file, instead of STDOUT")
cmd.Require(flag.Min, 1)
cmd.ParseFlags(args, true)
if *outfile == "" && cli.isTerminalOut {
return errors.New("Cowardly refusing to save to a terminal. Use the -o flag or redirect.")
}
responseBody, err := cli.client.ImageSave(context.Background(), cmd.Args())
if err != nil {
return err
}
defer responseBody.Close()
if *outfile == "" {
_, err := io.Copy(cli.out, responseBody)
return err
}
return copyToFile(*outfile, responseBody)
}
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