From ac744a6313de1a3b4fd33d99314ba9d556572636 Mon Sep 17 00:00:00 2001
From: Alfred Xing <alfredxing@users.noreply.github.com>
Date: Sun, 20 Jul 2014 09:17:19 -0700
Subject: [PATCH] Give a build warning if a layout does not exist

Throw a warning if a non-"none" layout is specified but the corresponding
layout file does not exist.
---
 lib/jekyll/convertible.rb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/jekyll/convertible.rb b/lib/jekyll/convertible.rb
index 8e9700b2..9a93ab71 100644
--- a/lib/jekyll/convertible.rb
+++ b/lib/jekyll/convertible.rb
@@ -163,6 +163,11 @@ module Jekyll
     def render_all_layouts(layouts, payload, info)
       # recursively render layouts
       layout = layouts[data["layout"]]
+
+      if !data["layout"].nil? && data["layout"] != "none" && layout.nil?
+        Jekyll.logger.warn("Build Warning:", "Layout #{data["layout"]} does not exist.")
+      end
+
       used = Set.new([layout])
 
       while layout