Basic skeleton for `dist` binary

Signed-off-by: Arnaud Porterie <arnaud.porterie@docker.com>

cmd/dist/list.go

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+package main
+
+import "github.com/codegangsta/cli"
+
+var (
+	commandList = cli.Command{
+		Name:   "images",
+		Usage:  "List available images",
+		Action: imageList,
+	}
+)
+
+func imageList(c *cli.Context) {
+}

cmd/dist/main.go

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+package main
+
+import (
+	"os"
+
+	"github.com/codegangsta/cli"
+)
+
+func main() {
+	app := cli.NewApp()
+	app.Name = "dist"
+	app.Usage = "Package and ship Docker content"
+
+	app.Action = commandList.Action
+	app.Commands = []cli.Command{
+		commandList,
+		commandPull,
+		commandPush,
+	}
+	app.Run(os.Args)
+}

cmd/dist/pull.go

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+package main
+
+import "github.com/codegangsta/cli"
+
+var (
+	commandPull = cli.Command{
+		Name:   "pull",
+		Usage:  "Pull and verify an image from a registry",
+		Action: imagePull,
+		Flags: []cli.Flag{
+			cli.StringFlag{
+				Name:  "r,registry",
+				Value: "hub.docker.io",
+				Usage: "Registry to use (e.g.: localhost:5000)",
+			},
+		},
+	}
+)
+
+func imagePull(c *cli.Context) {
+}

cmd/dist/push.go

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+package main
+
+import "github.com/codegangsta/cli"
+
+var (
+	commandPush = cli.Command{
+		Name:   "push",
+		Usage:  "Push an image to a registry",
+		Action: imagePush,
+		Flags: []cli.Flag{
+			cli.StringFlag{
+				Name:  "r,registry",
+				Value: "hub.docker.io",
+				Usage: "Registry to use (e.g.: localhost:5000)",
+			},
+		},
+	}
+)
+
+func imagePush(*cli.Context) {
+}