package client import ( "errors" "github.com/docker/docker/api/types" Cli "github.com/docker/docker/cli" flag "github.com/docker/docker/pkg/mflag" "github.com/docker/docker/reference" ) // 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) ref, err := reference.ParseNamed(cmd.Arg(1)) if err != nil { return err } if _, isCanonical := ref.(reference.Canonical); isCanonical { return errors.New("refusing to create a tag with a digest reference") } var tag string if tagged, isTagged := ref.(reference.NamedTagged); isTagged { tag = tagged.Tag() } options := types.ImageTagOptions{ ImageID: cmd.Arg(0), RepositoryName: ref.Name(), Tag: tag, Force: *force, } return cli.client.ImageTag(options) }