cmd: print current version name on cmd and Via header

cmd/go-away/main.go

@@ -76,14 +76,19 @@ func setupListener(network, address, socketMode string, proxy bool) (net.Listene
 	return listener, formattedAddress
 }
 
-var internalPackageName = func() string {
+var internalCmdName = "go-away"
+var internalMainName = "go-away"
+var internalMainVersion = "dev"
 
+func init() {
 	buildInfo, ok := debug.ReadBuildInfo()
 	if !ok {
-		return "go-away"
+		return
 	}
-	return buildInfo.Path
-}()
+	internalCmdName = buildInfo.Path
+	internalMainName = buildInfo.Main.Path
+	internalMainVersion = buildInfo.Main.Version
+}
 
 type MultiVar []string
 
@@ -141,7 +146,7 @@ func main() {
 	challengeTemplate := flag.String("challenge-template", "anubis", "name or path of the challenge template to use (anubis, forgejo)")
 	challengeTemplateTheme := flag.String("challenge-template-theme", "", "name of the challenge template theme to use (forgejo => [forgejo-auto, forgejo-dark, forgejo-light, gitea...])")
 
-	packageName := flag.String("package-path", internalPackageName, "package name to expose in .well-known url path")
+	packageName := flag.String("package-path", internalCmdName, "package name to expose in .well-known url path")
 
 	jwtPrivateKeySeed := flag.String("jwt-private-key-seed", "", "Seed for the jwt private key, or on JWT_PRIVATE_KEY_SEED env. One be generated by passing \"generate\" as a value, follows RFC 8032 private key definition. Defaults to random")
 
@@ -169,6 +174,8 @@ func main() {
 		slog.SetDefault(slog.New(h))
 	}
 
+	slog.Info("go-away", "package", internalMainName, "version", internalMainVersion, "cmd", internalCmdName)
+
 	var seed []byte
 
 	var kValue string
@@ -281,6 +288,8 @@ func main() {
 			Cache:                  cache,
 			Backends:               createdBackends,
 			Debug:                  *debugMode,
+			MainName:               internalMainName,
+			MainVersion:            internalMainVersion,
 			PackageName:            *packageName,
 			ChallengeTemplate:      *challengeTemplate,
 			ChallengeTemplateTheme: *challengeTemplateTheme,

lib/http.go

@@ -179,8 +179,9 @@ func (state *State) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 	data.EvaluateChallenges(w, r)
 
-	// TODO: make this configurable!
-	w.Header().Add("Via", fmt.Sprintf("%s %s", r.Proto, "go-away"))
+	if state.Settings().MainName != "" {
+		w.Header().Add("Via", fmt.Sprintf("%s %s@%s", r.Proto, state.Settings().MainName, state.Settings().MainVersion))
+	}
 
 	state.Mux.ServeHTTP(w, r)
 }

lib/policy/options.go

@@ -10,6 +10,8 @@ type Settings struct {
 	Backends               map[string]http.Handler
 	PrivateKeySeed         []byte
 	Debug                  bool
+	MainName               string
+	MainVersion            string
 	PackageName            string
 	ChallengeTemplate      string
 	ChallengeTemplateTheme string