Show build information in web UI

cmd/proxy/main.go

@@ -267,7 +267,10 @@ func runServe() {
 	logger := setupLogger(cfg.Log.Level, cfg.Log.Format)
 
 	// Create and start server
-	srv, err := server.New(cfg, logger)
+	srv, err := server.New(cfg, logger, server.BuildInfo{
+		Version: Version,
+		Commit:  Commit,
+	})
 	if err != nil {
 		logger.Error("failed to create server", "error", err)
 		os.Exit(1)

internal/server/layout.go

@@ -2,17 +2,24 @@ package server
 
 import "net/http"
 
-// Layout carries per-request fields consumed by the shared base template
-// (canonical URL, og:url). It is embedded in every page data struct so that
-// templates can reference {{.UIBaseURL}} and {{.CanonicalPath}} alongside the
-// page's own fields.
+// BuildInfo identifies the running proxy binary.
+type BuildInfo struct {
+	Version string
+	Commit  string
+}
+
+// Layout carries shared fields consumed by the base template. It is embedded
+// in every page data struct so templates can access canonical URL and build
+// information alongside the page's own fields.
 type Layout struct {
+	BuildInfo
 	UIBaseURL     string
 	CanonicalPath string
 }
 
 func (s *Server) layoutFor(r *http.Request) Layout {
 	return Layout{
+		BuildInfo:     s.buildInfo,
 		UIBaseURL:     s.cfg.UIBaseURL,
 		CanonicalPath: r.URL.Path,
 	}

internal/server/server.go

@@ -91,14 +91,15 @@ type Server struct {
 	db          *database.DB
 	storage     storage.Storage
 	logger      *slog.Logger
+	buildInfo   BuildInfo
 	http        *http.Server
 	templates   *Templates
 	cancel      context.CancelFunc
 	healthCache *healthCache
 }
 
 // New creates a new Server with the given configuration.
-func New(cfg *config.Config, logger *slog.Logger) (*Server, error) {
+func New(cfg *config.Config, logger *slog.Logger, buildInfo BuildInfo) (*Server, error) {
 	// Initialize database
 	var db *database.DB
 	var err error
@@ -152,6 +153,7 @@ func New(cfg *config.Config, logger *slog.Logger) (*Server, error) {
 		db:          db,
 		storage:     store,
 		logger:      logger,
+		buildInfo:   buildInfo,
 		templates:   &Templates{},
 		healthCache: hc,
 	}, nil

internal/server/server_test.go

@@ -100,10 +100,14 @@ func newTestServer(t *testing.T) *testServer {
 
 	// Create a minimal server struct for the handlers
 	s := &Server{
-		cfg:         cfg,
-		db:          db,
-		storage:     store,
-		logger:      logger,
+		cfg:     cfg,
+		db:      db,
+		storage: store,
+		logger:  logger,
+		buildInfo: BuildInfo{
+			Version: "test-version",
+			Commit:  "test-commit",
+		},
 		templates:   &Templates{},
 		healthCache: hc,
 	}
@@ -313,6 +317,9 @@ func TestDashboard(t *testing.T) {
 	if !strings.Contains(body, "Cached Artifacts") {
 		t.Error("dashboard should contain stats")
 	}
+	if !strings.Contains(body, "proxy test-version (test-commit)") {
+		t.Error("dashboard footer should contain build information")
+	}
 	if !strings.Contains(body, "Popular Packages") {
 		t.Error("dashboard should contain popular packages section")
 	}
@@ -1327,10 +1334,14 @@ func TestNewServer_StorageConnectivityCheck(t *testing.T) {
 
 	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
 
-	srv, err := New(cfg, logger)
+	buildInfo := BuildInfo{Version: "test-version", Commit: "test-commit"}
+	srv, err := New(cfg, logger, buildInfo)
 	if err != nil {
 		t.Fatalf("New() failed: %v", err)
 	}
+	if srv.buildInfo != buildInfo {
+		t.Errorf("build info = %#v, want %#v", srv.buildInfo, buildInfo)
+	}
 
 	// On Windows, OpenBucket normalises to file:///C:/path; on Unix the
 	// absolute path already starts with /, so file:// + /path == file:///path.

internal/server/templates/layout/footer.html

@@ -12,6 +12,11 @@ <h3 class="text-sm font-semibold text-gray-900 dark:text-gray-100 mb-3">About</h
                         <i data-lucide="github" class="w-4 h-4"></i><span>github.com/git-pkgs/proxy</span>
                     </a>
                 </p>
+                {{if .Version}}
+                <p class="text-xs text-gray-500 dark:text-gray-500 mt-2">
+                    proxy {{.Version}}{{if .Commit}} ({{.Commit}}){{end}}
+                </p>
+                {{end}}
             </div>
             <div>
                 <h3 class="text-sm font-semibold text-gray-900 dark:text-gray-100 mb-3">Resources</h3>