Add default {{date}} argument

adapter/handlebars/handlebars.go

@@ -78,7 +78,7 @@ func (hr *HandlebarsRenderer) loadTemplate(content string) (*raymond.Template, e
 // loadFileTemplate loads the template at given path into the renderer if needed.
 // Returns the parsed template.
 func (hr *HandlebarsRenderer) loadFileTemplate(path string) (*raymond.Template, error) {
-	wrap := errors.Wrapperf("load template file failed: %v", path)
+	wrap := errors.Wrapper("load template file failed")
 
 	path, err := filepath.Abs(path)
 	if err != nil {

adapter/handlebars/handlebars_test.go

@@ -64,6 +64,11 @@ func TestSlugHelper(t *testing.T) {
 func TestDateHelper(t *testing.T) {
 	sut := NewRenderer()
 
+	// Default
+	res, err := sut.Render("{{date}}", nil)
+	assert.Nil(t, err)
+	assert.Equal(t, res, "2009-11-17")
+
 	test := func(format string, expected string) {
 		res, err := sut.Render(fmt.Sprintf("{{date '%s'}}", format), nil)
 		assert.Nil(t, err)

adapter/handlebars/helpers/date.go

@@ -16,8 +16,14 @@ import (
 // {{date "medium"}} -> Nov 17, 2009
 // {{date "%Y-%m"}} -> 2009-11
 func RegisterDate(logger util.Logger, date date.Provider) {
-	raymond.RegisterHelper("date", func(arg string) string {
-		format := findFormat(arg)
+	raymond.RegisterHelper("date", func(opt interface{}) string {
+		format := "%Y-%m-%d"
+
+		arg, ok := opt.(string)
+		if ok {
+			format = findFormat(arg)
+		}
+
 		res, err := strftime.Format(format, date.Date(), strftime.WithUnixSeconds('s'))
 		if err != nil {
 			logger.Printf("the {{date}} template helper failed to format the date: %v", err)