Make bindata static build parse builtin templates correctly (#24003)

Close #24002


Two problems before:

1. The `log.Fatal` is missing after these `wrapFatal` calls, so the
error is not shown to users.
2. `GetTemplateAssetNames` has different behaviors for local files and
builtin assets, for builtin assets, it also returns directories, so we
need to check the extension again.

I have tested with `TAGS="bindata sqlite sqlite_unlock_notify" make
build && ./gitea` , it works well now. Before, the server responds
internal server error (because it doesn't complete the template parsing)

modules/templates/htmlrenderer.go

@@ -67,10 +67,14 @@ func (h *HTMLRender) TemplateLookup(name string) (*template.Template, error) {
 
 func (h *HTMLRender) CompileTemplates() error {
 	dirPrefix := "templates/"
+	extSuffix := ".tmpl"
 	tmpls := template.New("")
 	for _, path := range GetTemplateAssetNames() {
-		name := path[len(dirPrefix):]
-		name = strings.TrimSuffix(name, ".tmpl")
+		if !strings.HasSuffix(path, extSuffix) {
+			continue
+		}
+		name := strings.TrimPrefix(path, dirPrefix)
+		name = strings.TrimSuffix(name, extSuffix)
 		tmpl := tmpls.New(filepath.ToSlash(name))
 		for _, fm := range NewFuncMap() {
 			tmpl.Funcs(fm)
@@ -101,7 +105,11 @@ func HTMLRenderer(ctx context.Context) (context.Context, *HTMLRender) {
 
 	renderer := &HTMLRender{}
 	if err := renderer.CompileTemplates(); err != nil {
-		handleFatalError(err)
+		wrapFatal(handleNotDefinedPanicError(err))
+		wrapFatal(handleUnexpected(err))
+		wrapFatal(handleExpectedEnd(err))
+		wrapFatal(handleGenericTemplateError(err))
+		log.Fatal("HTMLRenderer error: %v", err)
 	}
 	if !setting.IsProd {
 		watcher.CreateWatcher(ctx, "HTML Templates", &watcher.CreateWatcherOpts{
@@ -116,13 +124,6 @@ func HTMLRenderer(ctx context.Context) (context.Context, *HTMLRender) {
 	return context.WithValue(ctx, rendererKey, renderer), renderer
 }
 
-func handleFatalError(err error) {
-	wrapFatal(handleNotDefinedPanicError(err))
-	wrapFatal(handleUnexpected(err))
-	wrapFatal(handleExpectedEnd(err))
-	wrapFatal(handleGenericTemplateError(err))
-}
-
 func wrapFatal(format string, args []interface{}) {
 	if format == "" {
 		return