Start with demo chub command

Add version and node subcommand as TODOs

examples/chub/main.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"errors"
+	"os"
+
+	"github.com/spf13/cobra"
+
+	"github.com/tendermint/tmlibs/cli"
+
+	"github.com/cosmos/cosmos-sdk/app"
+)
+
+// chubCmd is the entry point for this binary
+var (
+	chubCmd = &cobra.Command{
+		Use:   "chub",
+		Short: "Cosmos Hub command-line tool",
+		Run:   help,
+	}
+
+	lineBreak = &cobra.Command{Run: func(*cobra.Command, []string) {}}
+)
+
+func todoNotImplemented(_ *cobra.Command, _ []string) error {
+	return errors.New("TODO: Command not yet implemented")
+}
+
+func help(cmd *cobra.Command, args []string) {
+	cmd.Help()
+}
+
+func main() {
+	// disable sorting
+	cobra.EnableCommandSorting = false
+
+	// TODO: set this to something real
+	var node app.App
+
+	// add commands
+	// prepareRestServerCommands()
+	// prepareClientCommands()
+
+	chubCmd.AddCommand(
+		nodeCommand(node),
+		// restServerCmd,
+		// clientCmd,
+
+		lineBreak,
+		versionCmd,
+	)
+
+	// prepare and add flags
+	// executor := cli.PrepareMainCmd(chubCmd, "CH", os.ExpandEnv("$HOME/.cosmos-chub"))
+	executor := cli.PrepareBaseCmd(chubCmd, "CH", os.ExpandEnv("$HOME/.cosmos-chub"))
+	executor.Execute()
+}

examples/chub/node.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"github.com/spf13/cobra"
+
+	"github.com/cosmos/cosmos-sdk/app"
+)
+
+var (
+	initNodeCmd = &cobra.Command{
+		Use:   "init",
+		Short: "Initialize full node",
+		RunE:  todoNotImplemented,
+	}
+
+	resetNodeCmd = &cobra.Command{
+		Use:   "unsafe_reset_all",
+		Short: "Reset full node data (danger, must resync)",
+		RunE:  todoNotImplemented,
+	}
+)
+
+func startNodeCmd(node app.App) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "start",
+		Short: "Run the full node",
+		RunE:  todoNotImplemented,
+	}
+	return cmd
+}
+
+func nodeCommand(node app.App) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "node",
+		Short: "Run the full node",
+		RunE:  todoNotImplemented,
+	}
+	cmd.AddCommand(
+		initNodeCmd,
+		startNodeCmd(node),
+		resetNodeCmd,
+	)
+	return cmd
+}

examples/chub/version.go

@@ -0,0 +1,11 @@
+package main
+
+import "github.com/spf13/cobra"
+
+var (
+	versionCmd = &cobra.Command{
+		Use:   "version",
+		Short: "Print the app version",
+		RunE:  todoNotImplemented,
+	}
+)