Org writer: add code block identifier as #+name to src blocks.

src/Text/Pandoc/Writers/Org.hs

@@ -148,7 +148,10 @@ blockToOrg (Header level attr inlines) = do
                   then empty
                   else cr <> propertiesDrawer attr
   return $ headerStr <> " " <> contents <> drawerStr <> cr
-blockToOrg (CodeBlock (_,classes,kvs) str) = do
+blockToOrg (CodeBlock (ident,classes,kvs) str) = do
+  let name = if T.null ident
+             then empty
+             else literal $ "#+name: " <> ident
   let startnum = maybe "" (\x -> " " <> trimr x) $ lookup "startFrom" kvs
   let numberlines = if "numberLines" `elem` classes
                       then if "continuedSourceBlock" `elem` classes
@@ -159,7 +162,7 @@ blockToOrg (CodeBlock (_,classes,kvs) str) = do
   let (beg, end) = case at of
                       []    -> ("#+begin_example" <> numberlines, "#+end_example")
                       (x:_) -> ("#+begin_src " <> x <> numberlines, "#+end_src")
-  return $ literal beg $$ literal str $$ text end $$ blankline
+  return $ name $$ literal beg $$ literal str $$ text end $$ blankline
 blockToOrg (BlockQuote blocks) = do
   contents <- blockListToOrg blocks
   return $ blankline $$ "#+begin_quote" $$

test/Tests/Writers/Org.hs

@@ -66,4 +66,15 @@ tests =
           , "- ☒ b"
           ]
     ]
+
+  , testGroup "code blocks"
+    [ "identifier"
+      =: codeBlockWith ("abc", ["python"], []) "return True"
+      =?> T.unlines
+      [ "#+name: abc"
+      , "#+begin_src python"
+      , "return True"
+      , "#+end_src"
+      ]
+    ]
   ]