Move api/client -> cli/command

Using
  gomvpkg
     -from github.com/docker/docker/api/client
     -to github.com/docker/docker/cli/command
     -vcs_mv_cmd 'git mv {{.Src}} {{.Dst}}'

Signed-off-by: Daniel Nephin <dnephin@docker.com>
Upstream-commit: 0640a14b4fcba3715f7cc3bc9444f3c7f4827edd
Component: engine

components/engine/cli/command/service/scale.go

@@ -0,0 +1,88 @@
+package service
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"golang.org/x/net/context"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/cli"
+	"github.com/docker/docker/cli/command"
+	"github.com/spf13/cobra"
+)
+
+func newScaleCommand(dockerCli *command.DockerCli) *cobra.Command {
+	return &cobra.Command{
+		Use:   "scale SERVICE=REPLICAS [SERVICE=REPLICAS...]",
+		Short: "Scale one or multiple services",
+		Args:  scaleArgs,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return runScale(dockerCli, args)
+		},
+	}
+}
+
+func scaleArgs(cmd *cobra.Command, args []string) error {
+	if err := cli.RequiresMinArgs(1)(cmd, args); err != nil {
+		return err
+	}
+	for _, arg := range args {
+		if parts := strings.SplitN(arg, "=", 2); len(parts) != 2 {
+			return fmt.Errorf(
+				"Invalid scale specifier '%s'.\nSee '%s --help'.\n\nUsage:  %s\n\n%s",
+				arg,
+				cmd.CommandPath(),
+				cmd.UseLine(),
+				cmd.Short,
+			)
+		}
+	}
+	return nil
+}
+
+func runScale(dockerCli *command.DockerCli, args []string) error {
+	var errors []string
+	for _, arg := range args {
+		parts := strings.SplitN(arg, "=", 2)
+		serviceID, scale := parts[0], parts[1]
+		if err := runServiceScale(dockerCli, serviceID, scale); err != nil {
+			errors = append(errors, fmt.Sprintf("%s: %s", serviceID, err.Error()))
+		}
+	}
+
+	if len(errors) == 0 {
+		return nil
+	}
+	return fmt.Errorf(strings.Join(errors, "\n"))
+}
+
+func runServiceScale(dockerCli *command.DockerCli, serviceID string, scale string) error {
+	client := dockerCli.Client()
+	ctx := context.Background()
+
+	service, _, err := client.ServiceInspectWithRaw(ctx, serviceID)
+
+	if err != nil {
+		return err
+	}
+
+	serviceMode := &service.Spec.Mode
+	if serviceMode.Replicated == nil {
+		return fmt.Errorf("scale can only be used with replicated mode")
+	}
+	uintScale, err := strconv.ParseUint(scale, 10, 64)
+	if err != nil {
+		return fmt.Errorf("invalid replicas value %s: %s", scale, err.Error())
+	}
+	serviceMode.Replicated.Replicas = &uintScale
+
+	err = client.ServiceUpdate(ctx, service.ID, service.Version, service.Spec, types.ServiceUpdateOptions{})
+	if err != nil {
+		return err
+	}
+
+	fmt.Fprintf(dockerCli.Out(), "%s scaled to %s\n", serviceID, scale)
+	return nil
+}