/
tag.go
55 lines (45 loc) · 1.33 KB
/
tag.go
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package client
import (
"errors"
"net/url"
"github.com/docker/distribution/reference"
Cli "github.com/docker/docker/cli"
flag "github.com/docker/docker/pkg/mflag"
"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", []string{"IMAGE[:TAG] [REGISTRYHOST/][USERNAME/]NAME[:TAG]"}, Cli.DockerCommands["tag"].Description, true)
force := cmd.Bool([]string{"f", "-force"}, false, "Force the tagging even if there's a conflict")
cmd.Require(flag.Exact, 2)
cmd.ParseFlags(args, true)
v := url.Values{}
ref, err := reference.ParseNamed(cmd.Arg(1))
if err != nil {
return err
}
_, isDigested := ref.(reference.Digested)
if isDigested {
return errors.New("refusing to create a tag with a digest reference")
}
tag := ""
tagged, isTagged := ref.(reference.Tagged)
if isTagged {
tag = tagged.Tag()
}
//Check if the given image name can be resolved
if err := registry.ValidateRepositoryName(ref); err != nil {
return err
}
v.Set("repo", ref.Name())
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
}