adding version command

cmd/main.go

@@ -17,15 +17,16 @@ func Run(c *cli.Context) error {
 
 func Commands() []*cli.Command {
 	return []*cli.Command{
+		Add(),
+		Backup(),
 		Check(),
+		Clean(),
+		Debug(),
+		Edit(),
 		List(),
-		Add(),
 		Remove(),
-		Debug(),
-		Backup(),
 		Restore(),
-		Edit(),
-		Clean(),
+		Version(),
 	}
 }
 

cmd/version.go

@@ -0,0 +1,19 @@
+package cmd
+
+import (
+	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli/v2"
+)
+
+func Version() *cli.Command {
+	return &cli.Command{
+		Name:   "version",
+		Usage:  "",
+		Action: version,
+	}
+}
+
+func version(c *cli.Context) error {
+	logrus.Infof("goodhosts %s", c.Context.Value("version"))
+	return nil
+}

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -12,13 +13,16 @@ import (
 	"github.com/urfave/cli/v2"
 )
 
+var version = "dev"
+
 func main() {
 	app := &cli.App{
 		Name:     "goodhosts",
 		Usage:    "manage your hosts file goodly",
 		Action:   cmd.DefaultAction,
 		Commands: cmd.Commands(),
 		Before: func(ctx *cli.Context) error {
+			ctx.Context = context.WithValue(ctx.Context, "version", version)
 			if ctx.Bool("debug") {
 				logrus.SetLevel(logrus.DebugLevel)
 			} else {