Add experimental docker stack commands

Signed-off-by: Daniel Nephin <dnephin@docker.com>
Upstream-commit: 71104bb592dc98467d3828394eabcbe50ca22ae4
Component: engine

components/engine/api/client/stack/config.go

@@ -0,0 +1,41 @@
+// +build experimental
+
+package stack
+
+import (
+	"github.com/docker/docker/api/client"
+	"github.com/docker/docker/api/client/bundlefile"
+	"github.com/docker/docker/cli"
+	"github.com/spf13/cobra"
+)
+
+type configOptions struct {
+	bundlefile string
+	namespace  string
+}
+
+func newConfigCommand(dockerCli *client.DockerCli) *cobra.Command {
+	var opts configOptions
+
+	cmd := &cobra.Command{
+		Use:   "config [OPTIONS] STACK",
+		Short: "Print the stack configuration",
+		Args:  cli.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			opts.namespace = args[0]
+			return runConfig(dockerCli, opts)
+		},
+	}
+
+	flags := cmd.Flags()
+	addBundlefileFlag(&opts.bundlefile, flags)
+	return cmd
+}
+
+func runConfig(dockerCli *client.DockerCli, opts configOptions) error {
+	bundle, err := loadBundlefile(dockerCli.Err(), opts.namespace, opts.bundlefile)
+	if err != nil {
+		return err
+	}
+	return bundlefile.Print(dockerCli.Out(), bundle)
+}