From 03077e790f4195bdd5d73de66ea898b441b70c76 Mon Sep 17 00:00:00 2001
From: Tommy Chen <tommy351@gmail.com>
Date: Mon, 18 May 2015 22:47:59 +0800
Subject: [PATCH] relative_url helper: replace trailing slash with
 `index.html`.

---
 lib/plugins/helper/relative_url.js   | 7 +++++++
 test/scripts/helpers/relative_url.js | 8 ++++----
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/lib/plugins/helper/relative_url.js b/lib/plugins/helper/relative_url.js
index 805f90e352..1c71da79b1 100644
--- a/lib/plugins/helper/relative_url.js
+++ b/lib/plugins/helper/relative_url.js
@@ -17,6 +17,13 @@ function relativeUrlHelper(from, to){
     out.unshift('..');
   }
 
+  var outLength = out.length;
+
+  // If the last 2 elements of `out` is empty strings, replace them with `index.html`.
+  if (outLength > 1 && !out[outLength - 1] && !out[outLength] - 2){
+    out = out.slice(0, outLength - 2).concat('index.html');
+  }
+
   return out.join('/').replace(/\/{2,}/g, '/');
 }
 
diff --git a/test/scripts/helpers/relative_url.js b/test/scripts/helpers/relative_url.js
index 43ee1e36d0..0324d8151d 100644
--- a/test/scripts/helpers/relative_url.js
+++ b/test/scripts/helpers/relative_url.js
@@ -25,8 +25,8 @@ describe('relative_url', function(){
   });
 
   it('to root', function(){
-    relativeURL('index.html', '/').should.eql('/');
-    relativeURL('foo/', '/').should.eql('../');
-    relativeURL('foo/index.html', '/').should.eql('../');
+    relativeURL('index.html', '/').should.eql('index.html');
+    relativeURL('foo/', '/').should.eql('../index.html');
+    relativeURL('foo/index.html', '/').should.eql('../index.html');
   });
-});
+});
\ No newline at end of file