added use of Cobra CLI

squash

cmd/tendermint/commands/gen_validator.go

@@ -0,0 +1,27 @@
+package commands
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	"github.com/tendermint/go-wire"
+	"github.com/tendermint/tendermint/types"
+)
+
+var genValidatorCmd = &cobra.Command{
+	Use:   "gen_validator",
+	Short: "Generate new validator keypair",
+	Run:   genValidator,
+}
+
+func init() {
+	RootCmd.AddCommand(genValidatorCmd)
+}
+
+func genValidator(cmd *cobra.Command, args []string) {
+	privValidator := types.GenPrivValidator()
+	privValidatorJSONBytes := wire.JSONBytesPretty(privValidator)
+	fmt.Printf(`%v
+`, string(privValidatorJSONBytes))
+}