fix: stop relying on goreleaser for version

VERSION

@@ -0,0 +1 @@
+v0.0.5

cmd/root.go

@@ -22,10 +22,13 @@ ENVIRONMENT VARIABLES
 
 // Execute adds all child commands to the root command and sets flags appropriately.
 // This is called by main.main(). It only needs to happen once to the rootCmd.
-func Execute(version string) {
-	rootCmd.Version = version
+func Execute() {
 	err := rootCmd.Execute()
 	if err != nil {
 		os.Exit(1)
 	}
 }
+
+func SetVersion(version string) {
+	rootCmd.Version = version
+}

main.go

@@ -1,17 +1,10 @@
 package main
 
 import (
-	"fmt"
-
 	"github.com/tnyeanderson/ddns/cmd"
 )
 
-// These get populated by goreleaser
-var (
-	version = "dev"
-	commit  = "none"
-)
-
 func main() {
-	cmd.Execute(fmt.Sprintf("%s commit:%s", version, commit))
+	cmd.SetVersion(version())
+	cmd.Execute()
 }

version.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"runtime/debug"
+	"strings"
+
+	_ "embed"
+)
+
+//go:embed VERSION
+var versionTag string
+
+func getCommit() string {
+	if info, ok := debug.ReadBuildInfo(); ok {
+		for _, setting := range info.Settings {
+			if setting.Key == "vcs.revision" {
+				return setting.Value
+			}
+		}
+	}
+	return ""
+}
+
+func version() string {
+	s := strings.TrimSpace(versionTag)
+	if c := getCommit(); c != "" {
+		s += " commit:" + c
+	}
+	return s
+}