From e7a68fc7e82028dbf66f25350b45875fbe634db6 Mon Sep 17 00:00:00 2001
From: John MacFarlane <fiddlosopher@gmail.com>
Date: Mon, 1 Jul 2013 20:56:27 -0700
Subject: Markdown writer: Render yaml title block fields in alpha order.

This makes the output predictable; previously it varied across
implementations.
---
 src/Text/Pandoc/Writers/Markdown.hs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'src/Text')

diff --git a/src/Text/Pandoc/Writers/Markdown.hs b/src/Text/Pandoc/Writers/Markdown.hs
index 1715f0af1..aa29ebce1 100644
--- a/src/Text/Pandoc/Writers/Markdown.hs
+++ b/src/Text/Pandoc/Writers/Markdown.hs
@@ -38,7 +38,8 @@ import Text.Pandoc.Shared
 import Text.Pandoc.Writers.Shared
 import Text.Pandoc.Options
 import Text.Pandoc.Parsing hiding (blankline, char, space)
-import Data.List ( group, isPrefixOf, find, intersperse, transpose )
+import Data.List ( group, isPrefixOf, find, intersperse, transpose, sortBy )
+import Data.Ord ( comparing )
 import Text.Pandoc.Pretty
 import Control.Monad.State
 import qualified Data.Set as Set
@@ -127,7 +128,7 @@ jsonToYaml (Object hashmap) =
                (k', Object _, x)  -> (k' <> ":") $$ nest 2 x
                (_, String "", _)  -> empty
                (k', _, x)         -> k' <> ":" <> space <> x)
-       $ H.toList hashmap
+       $ sortBy (comparing fst) $ H.toList hashmap
 jsonToYaml (Array vec) =
   vcat $ map (\v -> hang 2 "- " (jsonToYaml v)) $ V.toList vec
 jsonToYaml (String "") = empty
-- 
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