Add command to generate man pages

The climan package has a command that can be registered with any urfav
cli app to generate man pages.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

cmd/containerd-stress/main.go

@@ -30,6 +30,7 @@ import (
 
 	"github.com/containerd/containerd"
 	"github.com/containerd/containerd/namespaces"
+	"github.com/containerd/containerd/pkg/climan"
 	"github.com/containerd/containerd/plugin"
 	metrics "github.com/docker/go-metrics"
 	"github.com/sirupsen/logrus"
@@ -161,6 +162,7 @@ func main() {
 	}
 	app.Commands = []cli.Command{
 		densityCommand,
+		climan.Command,
 	}
 	app.Action = func(context *cli.Context) error {
 		config := config{

cmd/containerd/command/main.go

@@ -70,6 +70,17 @@ func App() *cli.App {
 	app.Name = "containerd"
 	app.Version = version.Version
 	app.Usage = usage
+	app.Description = `
+containerd is a high performance container runtime whose daemon can be started
+by using this command. If none of the *config*, *publish*, or *help* commands
+are specified, the default action of the **containerd** command is to start the
+containerd daemon in the foreground.
+
+
+A default configuration is used if no TOML configuration is specified or located
+at the default file location. The *containerd config* command can be used to
+generate the default configuration for containerd. The output of that command
+can be used and modified as necessary as a custom configuration.`
 	app.Flags = []cli.Flag{
 		cli.StringFlag{
 			Name:  "config,c",

cmd/containerd/main.go

@@ -21,6 +21,7 @@ import (
 	"os"
 
 	"github.com/containerd/containerd/cmd/containerd/command"
+	"github.com/containerd/containerd/pkg/climan"
 	"github.com/containerd/containerd/pkg/seed"
 )
 
@@ -30,6 +31,7 @@ func init() {
 
 func main() {
 	app := command.App()
+	app.Commands = append(app.Commands, climan.Command)
 	if err := app.Run(os.Args); err != nil {
 		fmt.Fprintf(os.Stderr, "containerd: %s\n", err)
 		os.Exit(1)

cmd/ctr/app/main.go

@@ -57,6 +57,11 @@ func New() *cli.App {
 	app := cli.NewApp()
 	app.Name = "ctr"
 	app.Version = version.Version
+	app.Description = `
+ctr is an unsupported debug and administrative client for interacting
+with the containerd daemon. Because it is unsupported, the commands,
+options, and operations are not guaranteed to be backward compatible or
+stable from release to release of the containerd project.`
 	app.Usage = `
         __
   _____/ /______

cmd/ctr/main.go

@@ -21,6 +21,7 @@ import (
 	"os"
 
 	"github.com/containerd/containerd/cmd/ctr/app"
+	"github.com/containerd/containerd/pkg/climan"
 	"github.com/containerd/containerd/pkg/seed"
 	"github.com/urfave/cli"
 )
@@ -34,6 +35,7 @@ func init() {
 func main() {
 	app := app.New()
 	app.Commands = append(app.Commands, pluginCmds...)
+	app.Commands = append(app.Commands, climan.Command)
 	if err := app.Run(os.Args); err != nil {
 		fmt.Fprintf(os.Stderr, "ctr: %s\n", err)
 		os.Exit(1)