From e21b6d7ce266ebdb1dc5bd2203b5aebed74c0cf5 Mon Sep 17 00:00:00 2001
From: Ryan Burgoyne <rburgoyne@gecoinc.com>
Date: Wed, 20 Feb 2013 16:49:39 -0700
Subject: [PATCH] Check that meta values are not empty before applying them.

---
 pandoc.pm | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/pandoc.pm b/pandoc.pm
index 0c98b98..ed95c11 100644
--- a/pandoc.pm
+++ b/pandoc.pm
@@ -244,9 +244,19 @@ sub htmlize ($@) {
         return join " ", @string_without_spaces;
     }
 
-    $pagestate{$page}{meta}{title} = compile_string @doc_title;
-    $pagestate{$page}{meta}{author} = compile_string @primary_author;
-    $pagestate{$page}{meta}{date} = compile_string @doc_date;
+    my $title = compile_string @doc_title;
+    my $author = compile_string @primary_author;
+    my $date = compile_string @doc_date;
+
+    if ($title) {
+        $pagestate{$page}{meta}{title} = $title;
+    }
+    if ($author) {
+        $pagestate{$page}{meta}{author} = $author;
+    }
+    if ($date) {
+        $pagestate{$page}{meta}{date} = $date;
+    }
 
     return $content;
 }
-- 
2.39.2