allow custom date formats

This adds a new datef function instead of changing date function in an
effort to keep backwards compatibility.

datef is intentionally used in the example to make it clear to the user
that it is possible to set a custom date format.

2 files changed, 4 insertions, 1 deletions

diff --git a/in.html b/in.html
index d1437e8..a9f63e6 100644
--- a/in.html
+++ b/in.html
@@ -10,7 +10,7 @@
       <small class="source">
         via <a href="{{.SourceLink}}">{{.SourceTitle}}</a>
       </small>
-      <small class="date">{{.Date | date}}</small>
+      <small class="date">{{.Date | datef "January 2, 2006"}}</small>
     </div>
     {{end}}
   </section>
diff --git a/openring.go b/openring.go
index cbaba1f..4f74631 100644
--- a/openring.go
+++ b/openring.go
@@ -76,6 +76,9 @@ func main() {
 			"date": func(t time.Time) string {
 				return t.Format("January 2, 2006")
 			},
+			"datef": func(fmt string, t time.Time) string {
+				return t.Format(fmt)
+			},
 		}).
 		Parse(string(input))
 	if err != nil {