'version' command in zrok executable (#56)

cmd/zrok/version.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+	"github.com/openziti-test-kitchen/zrok/build"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(newVersionCommand().cmd)
+}
+
+type versionCommand struct {
+	cmd *cobra.Command
+}
+
+func newVersionCommand() *versionCommand {
+	cmd := &cobra.Command{
+		Use:  "version",
+		Args: cobra.ExactArgs(0),
+	}
+	command := &versionCommand{cmd: cmd}
+	cmd.Run = command.run
+	return command
+}
+
+func (cmd *versionCommand) run(_ *cobra.Command, _ []string) {
+	fmt.Println("               _    \n _____ __ ___ | | __\n|_  / '__/ _ \\| |/ /\n / /| | | (_) |   < \n/___|_|  \\___/|_|\\_\\\n\n" + build.String() + "\n")
+}