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This patch creates a new cli package that allows to combine both client and daemon commands (there is only one daemon command: docker daemon). The `-d` and `--daemon` top-level flags are deprecated and a special message is added to prompt the user to use `docker daemon`. Providing top-level daemon-specific flags for client commands result in an error message prompting the user to use `docker daemon`. This patch does not break any old but correct usages. This also makes `-d` and `--daemon` flags, as well as the `daemon` command illegal in client-only binaries. Signed-off-by: Tibor Vass <tibor@docker.com>
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
package client
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import (
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"errors"
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"io"
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"net/url"
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"os"
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Cli "github.com/docker/docker/cli"
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flag "github.com/docker/docker/pkg/mflag"
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)
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// CmdSave saves one or more images to a tar archive.
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//
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// The tar archive is written to STDOUT by default, or written to a file.
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//
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// Usage: docker save [OPTIONS] IMAGE [IMAGE...]
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func (cli *DockerCli) CmdSave(args ...string) error {
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cmd := Cli.Subcmd("save", []string{"IMAGE [IMAGE...]"}, "Save an image(s) to a tar archive (streamed to STDOUT by default)", true)
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outfile := cmd.String([]string{"o", "-output"}, "", "Write to an file, instead of STDOUT")
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cmd.Require(flag.Min, 1)
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cmd.ParseFlags(args, true)
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var (
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output io.Writer = cli.out
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err error
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)
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if *outfile != "" {
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output, err = os.Create(*outfile)
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if err != nil {
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return err
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}
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} else if cli.isTerminalOut {
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return errors.New("Cowardly refusing to save to a terminal. Use the -o flag or redirect.")
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}
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sopts := &streamOpts{
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rawTerminal: true,
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out: output,
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}
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if len(cmd.Args()) == 1 {
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image := cmd.Arg(0)
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if _, err := cli.stream("GET", "/images/"+image+"/get", sopts); err != nil {
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return err
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}
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} else {
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v := url.Values{}
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for _, arg := range cmd.Args() {
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v.Add("names", arg)
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}
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if _, err := cli.stream("GET", "/images/get?"+v.Encode(), sopts); err != nil {
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return err
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}
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}
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return nil
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}
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