dir: Pass Date to templates

dir.go

@@ -16,13 +16,14 @@ import (
 
 // Dir represents a directory.
 type Dir struct {
-	Title   string  // Directory title.
-	Content string  // Directory index content.
-	Path    string  // Directory path.
-	Pages   []*Page // Pages in this directory.
-	Dirs    []*Dir  // Subdirectories.
-	index   *Page   // The index page.
-	feed    []byte  // Atom feed.
+	Title   string
+	Date    time.Time
+	Content string
+	Path    string
+	Pages   []*Page
+	Dirs    []*Dir
+	index   *Page  // The index page.
+	feed    []byte // Atom feed.
 }
 
 // NewDir returns a new Dir with the given path.
@@ -76,6 +77,7 @@ func (d *Dir) read(srcDir, path string, task *Task) error {
 			if strings.TrimSuffix(name, ext) == "index" {
 				d.index = NewPage(d.Path, content)
 				d.Title = d.index.Title
+				d.Date = d.index.Date
 				d.Content = d.index.Content
 			} else {
 				d.Pages = append(d.Pages, NewPage(path, content))