adds version command

.goreleaser.yml

@@ -18,6 +18,9 @@ builds:
       - "-s"
       - "-w"
       - "-extldflags '-static'"
+      - "-X go.xsfx.dev/wg-quicker/cmd.version={{.Version}}"
+      - "-X go.xsfx.dev/wg-quicker/cmd.commit={{.ShortCommit}}"
+      - "-X go.xsfx.dev/wg-quicker/cmd.date={{.Date}}"
     hooks:
       pre:
         - make clean

cmd/root.go

@@ -2,6 +2,7 @@
 package cmd
 
 import (
+	"fmt"
 	"io/ioutil"
 	"os"
 
@@ -10,6 +11,12 @@ import (
 	"go.xsfx.dev/wg-quicker/wgquick"
 )
 
+var (
+	version = "dev"
+	commit  = "none"
+	date    = "unknown"
+)
+
 var (
 	iface    string
 	verbose  bool
@@ -33,6 +40,14 @@ var rootCmd = &cobra.Command{
 	},
 }
 
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print version informations",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Printf("wg-quicker %s, commit %s, build on %s", version, commit, date) // nolint: forbidigo
+	},
+}
+
 var upCmd = &cobra.Command{
 	Use:   "up [ config_file | interface ]",
 	Short: "Bringing interface up",
@@ -117,6 +132,7 @@ func init() {
 	rootCmd.AddCommand(upCmd)
 	rootCmd.AddCommand(downCmd)
 	rootCmd.AddCommand(syncCmd)
+	rootCmd.AddCommand(versionCmd)
 }
 
 func Execute() {