support --version using -X

.github/workflows/release-cli.yml

@@ -40,6 +40,7 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           goos: ${{ matrix.goos }}
           goarch: ${{ matrix.goarch }}
+          ldflags: -X main.version=${{ github.ref }}
           overwrite: true
           md5sum: false
           sha256sum: false

main.go

@@ -7,6 +7,8 @@ import (
 	"github.com/fiatjaf/cli/v3"
 )
 
+var version string = "debug"
+
 var app = &cli.Command{
 	Name:                      "nak",
 	Suggest:                   true,
@@ -27,6 +29,7 @@ var app = &cli.Command{
 		bunker,
 		serve,
 	},
+	Version: version,
 	Flags: []cli.Flag{
 		&cli.BoolFlag{
 			Name:       "quiet",