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moby--moby/api/client/save.go
John Howard 126529c6d0 Windows: Security warning based on server OS
Signed-off-by: John Howard <jhoward@microsoft.com>
2015-06-26 10:33:45 -07:00

57 lines
1.3 KiB
Go

package client
import (
"errors"
"io"
"net/url"
"os"
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...]"}, "Save an image(s) to a tar archive (streamed to STDOUT by default)", true)
outfile := cmd.String([]string{"o", "-output"}, "", "Write to an file, instead of STDOUT")
cmd.Require(flag.Min, 1)
cmd.ParseFlags(args, true)
var (
output io.Writer = cli.out
err error
)
if *outfile != "" {
output, err = os.Create(*outfile)
if err != nil {
return err
}
} else if cli.isTerminalOut {
return errors.New("Cowardly refusing to save to a terminal. Use the -o flag or redirect.")
}
sopts := &streamOpts{
rawTerminal: true,
out: output,
}
if len(cmd.Args()) == 1 {
image := cmd.Arg(0)
if _, err := cli.stream("GET", "/images/"+image+"/get", sopts); err != nil {
return err
}
} else {
v := url.Values{}
for _, arg := range cmd.Args() {
v.Add("names", arg)
}
if _, err := cli.stream("GET", "/images/get?"+v.Encode(), sopts); err != nil {
return err
}
}
return nil
}