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moby--moby/api/client/tag.go

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package client
import (
"net/url"
flag "github.com/docker/docker/pkg/mflag"
"github.com/docker/docker/pkg/parsers"
"github.com/docker/docker/registry"
)
// CmdTag tags an image into a repository.
//
// Usage: docker tag [OPTIONS] IMAGE[:TAG] [REGISTRYHOST/][USERNAME/]NAME[:TAG]
func (cli *DockerCli) CmdTag(args ...string) error {
cmd := cli.Subcmd("tag", "IMAGE[:TAG] [REGISTRYHOST/][USERNAME/]NAME[:TAG]", "Tag an image into a repository", true)
force := cmd.Bool([]string{"f", "#force", "-force"}, false, "Force")
cmd.Require(flag.Exact, 2)
cmd.ParseFlags(args, true)
var (
repository, tag = parsers.ParseRepositoryTag(cmd.Arg(1))
v = url.Values{}
)
//Check if the given image name can be resolved
if err := registry.ValidateRepositoryName(repository); err != nil {
return err
}
v.Set("repo", repository)
v.Set("tag", tag)
if *force {
v.Set("force", "1")
}
if _, _, err := readBody(cli.call("POST", "/images/"+cmd.Arg(0)+"/tag?"+v.Encode(), nil, nil)); err != nil {
return err
}
return nil
}