Move manpage gen to separate binary

This moves the man page generation to a separate binary

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

cmd/containerd-stress/main.go

@@ -30,7 +30,6 @@ 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"
@@ -162,7 +161,6 @@ func main() {
 	}
 	app.Commands = []cli.Command{
 		densityCommand,
-		climan.Command,
 	}
 	app.Action = func(context *cli.Context) error {
 		config := config{

cmd/containerd/main.go

@@ -21,7 +21,6 @@ import (
 	"os"
 
 	"github.com/containerd/containerd/cmd/containerd/command"
-	"github.com/containerd/containerd/pkg/climan"
 	"github.com/containerd/containerd/pkg/seed"
 )
 
@@ -31,7 +30,6 @@ 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/main.go

@@ -21,7 +21,6 @@ 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"
 )
@@ -35,7 +34,6 @@ 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)

cmd/gen-manpages/main.go

@@ -0,0 +1,57 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/containerd/containerd/cmd/containerd/command"
+	"github.com/containerd/containerd/cmd/ctr/app"
+	"github.com/urfave/cli"
+)
+
+func main() {
+	if err := run(); err != nil {
+		fmt.Fprint(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func run() error {
+	flag.Parse()
+	apps := map[string]*cli.App{
+		"containerd": command.App(),
+		"ctr":        app.New(),
+	}
+	dir := flag.Arg(0)
+	for name, app := range apps {
+		// clear out the usage as we use banners that do not display in man pages
+		app.Usage = ""
+		data, err := app.ToMan()
+		if err != nil {
+			return err
+		}
+		if err := ioutil.WriteFile(filepath.Join(dir, fmt.Sprintf("%s.1", name)), []byte(data), 0644); err != nil {
+			return err
+		}
+	}
+	return nil
+}