Use spf13/cobra for docker tag

This fix is part of the effort to convert commands to spf13/cobra #23211.

Thif fix coverted command `docker tag` to use spf13/cobra

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

api/client/commands.go

@@ -20,7 +20,6 @@ func (cli *DockerCli) Command(name string) func(...string) error {
 		"rm":      cli.CmdRm,
 		"save":    cli.CmdSave,
 		"stats":   cli.CmdStats,
-		"tag":     cli.CmdTag,
 		"update":  cli.CmdUpdate,
 		"version": cli.CmdVersion,
 	}[name]

api/client/image/tag.go

@@ -0,0 +1,41 @@
+package image
+
+import (
+	"golang.org/x/net/context"
+
+	"github.com/docker/docker/api/client"
+	"github.com/docker/docker/cli"
+	"github.com/spf13/cobra"
+)
+
+type tagOptions struct {
+	image string
+	name  string
+}
+
+// NewTagCommand create a new `docker tag` command
+func NewTagCommand(dockerCli *client.DockerCli) *cobra.Command {
+	var opts tagOptions
+
+	cmd := &cobra.Command{
+		Use:   "tag IMAGE[:TAG] [REGISTRYHOST/][USERNAME/]NAME[:TAG]",
+		Short: "Tag an image into a repository",
+		Args:  cli.ExactArgs(2),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			opts.image = args[0]
+			opts.name = args[1]
+			return runTag(dockerCli, opts)
+		},
+	}
+
+	flags := cmd.Flags()
+	flags.SetInterspersed(false)
+
+	return cmd
+}
+
+func runTag(dockerCli *client.DockerCli, opts tagOptions) error {
+	ctx := context.Background()
+
+	return dockerCli.Client().ImageTag(ctx, opts.image, opts.name)
+}

api/client/tag.go

@@ -1,20 +0,0 @@
-package client
-
-import (
-	"golang.org/x/net/context"
-
-	Cli "github.com/docker/docker/cli"
-	flag "github.com/docker/docker/pkg/mflag"
-)
-
-// 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)
-	cmd.Require(flag.Exact, 2)
-
-	cmd.ParseFlags(args, true)
-
-	return cli.client.ImageTag(context.Background(), cmd.Arg(0), cmd.Arg(1))
-}

cli/cobraadaptor/adaptor.go

@@ -54,6 +54,7 @@ func NewCobraAdaptor(clientFlags *cliflags.ClientFlags) CobraAdaptor {
 		image.NewRemoveCommand(dockerCli),
 		image.NewSearchCommand(dockerCli),
 		image.NewImportCommand(dockerCli),
+		image.NewTagCommand(dockerCli),
 		network.NewNetworkCommand(dockerCli),
 		volume.NewVolumeCommand(dockerCli),
 	)

cli/usage.go

@@ -25,7 +25,6 @@ var DockerCommandUsage = []Command{
 	{"rm", "Remove one or more containers"},
 	{"save", "Save one or more images to a tar archive"},
 	{"stats", "Display a live stream of container(s) resource usage statistics"},
-	{"tag", "Tag an image into a repository"},
 	{"update", "Update configuration of one or more containers"},
 	{"version", "Show the Docker version information"},
 }