[#159] Add version-command for ots-cli

Signed-off-by: Knut Ahlers <knut@ahlers.me>

cmd/ots-cli/cmd_version.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Displays the tool version",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Printf("ots-cli %s\n", version) //nolint:forbidigo
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}

cmd/ots-cli/main.go

@@ -4,6 +4,8 @@ import (
 	"os"
 )
 
+var version = "dev"
+
 func main() {
 	if err := rootCmd.Execute(); err != nil {
 		os.Exit(1)