refactor code

main.go

@@ -45,34 +45,38 @@ func parseFlag(args []string) {
 	flag.CommandLine.Parse(args)
 }
 
-func versionInfo() *debug.BuildInfo {
+type versionInfo struct {
+	airVersion string
+	goVersion  string
+}
+
+func GetVersionInfo() versionInfo {
+	if len(airVersion) != 0 && len(goVersion) != 0 {
+		return versionInfo{
+			airVersion: airVersion,
+			goVersion:  goVersion,
+		}
+	}
 	if info, ok := debug.ReadBuildInfo(); ok {
-		return info
+		return versionInfo{
+			airVersion: info.Main.Version,
+			goVersion:  runtime.Version(),
+		}
+	}
+	return versionInfo{
+		airVersion: "(unknown)",
+		goVersion:  runtime.Version(),
 	}
-	return nil
 }
 
 func main() {
-	versionInfo := versionInfo()
-	var goVersion string
-	var airVersion string
-	if versionInfo != nil {
-		goVersion = versionInfo.GoVersion
-		airVersion = versionInfo.Main.Version
-	} else {
-		airVersion = "(unknown version)"
-		goVersion = runtime.Version()
-	}
-	// TODO: how to get the version of the binary? gofumpt
-	// https://github.com/cosmtrek/air/issues/434 but just get devel :(
-	// https: // www.reddit.com/r/golang/comments/udhml7/best_way_to_embed_version_info_into_binary/
-	// go embed maybe a good idea
+	versionInfo := GetVersionInfo()
 	fmt.Printf(`
   __    _   ___  
  / /\  | | | |_) 
 /_/--\ |_| |_| \_ %s, built with Go %s
 
-`, airVersion, goVersion)
+`, versionInfo.airVersion, versionInfo.goVersion)
 
 	if showVersion {
 		return