Org reader: respect `creator` export option

The `creator` option controls whether the creator meta-field should be
included in the final markup.  Setting `#+OPTIONS: creator:nil` will
drop the creator field from the final meta-data output.

Org-mode recognizes the special value `comment` for this field, causing
the creator to be included in a comment.  This is difficult to translate
to Pandoc internals and is hence interpreted the same as other truish
values (i.e. the meta field is kept if it's present).

4 files changed, 14 insertions, 5 deletions

diff --git a/src/Text/Pandoc/Readers/Org/ExportSettings.hs b/src/Text/Pandoc/Readers/Org/ExportSettings.hs
index 6233a6104..283cfa998 100644
--- a/src/Text/Pandoc/Readers/Org/ExportSettings.hs
+++ b/src/Text/Pandoc/Readers/Org/ExportSettings.hs
@@ -56,7 +56,9 @@ exportSetting = choice
   , archivedTreeSetting "arch" (\val es -> es { exportArchivedTrees = val })
   , booleanSetting "author" (\val es -> es { exportWithAuthor = val })
   , ignoredSetting "c"
-  , ignoredSetting "creator"
+  -- org-mode allows the special value `comment` for creator, which we'll
+  -- interpret as true as it doesn't make sense in the context of Pandoc.
+  , booleanSetting "creator" (\val es -> es { exportWithCreator = val })
   , complementableListSetting "d" (\val es -> es { exportDrawers = val })
   , ignoredSetting "date"
   , ignoredSetting "e"
diff --git a/src/Text/Pandoc/Readers/Org/Meta.hs b/src/Text/Pandoc/Readers/Org/Meta.hs
index a20c25e09..11eb18e36 100644
--- a/src/Text/Pandoc/Readers/Org/Meta.hs
+++ b/src/Text/Pandoc/Readers/Org/Meta.hs
@@ -54,10 +54,9 @@ metaExport :: OrgParser (F Meta)
 metaExport = do
   st <- getState
   let settings = orgStateExportSettings st
-  let withAuthor = exportWithAuthor settings
-  let withEmail  = exportWithEmail settings
-  return $ (if withAuthor then id else removeMeta "author")
-         . (if withEmail  then id else removeMeta "email")
+  return $ (if exportWithAuthor  settings then id else removeMeta "author")
+         . (if exportWithCreator settings then id else removeMeta "creator")
+         . (if exportWithEmail   settings then id else removeMeta "email")
         <$> orgStateMeta st
 
 removeMeta :: String -> Meta -> Meta
diff --git a/src/Text/Pandoc/Readers/Org/ParserState.hs b/src/Text/Pandoc/Readers/Org/ParserState.hs
index 4c3aa298c..84dbe9d33 100644
--- a/src/Text/Pandoc/Readers/Org/ParserState.hs
+++ b/src/Text/Pandoc/Readers/Org/ParserState.hs
@@ -164,6 +164,7 @@ data ExportSettings = ExportSettings
   , exportSpecialStrings  :: Bool -- ^ Parse ellipses and dashes smartly
   , exportSubSuperscripts :: Bool -- ^ TeX-like syntax for sub- and superscripts
   , exportWithAuthor      :: Bool -- ^ Include author in final meta-data
+  , exportWithCreator     :: Bool -- ^ Include creator in final meta-data
   , exportWithEmail       :: Bool -- ^ Include email in final meta-data
   }
 
@@ -180,6 +181,7 @@ defaultExportSettings = ExportSettings
   , exportSpecialStrings = True
   , exportSubSuperscripts = True
   , exportWithAuthor = True
+  , exportWithCreator = True
   , exportWithEmail = True
   }
 
diff --git a/tests/Tests/Readers/Org.hs b/tests/Tests/Readers/Org.hs
index 5191f63d5..d6e7bba22 100644
--- a/tests/Tests/Readers/Org.hs
+++ b/tests/Tests/Readers/Org.hs
@@ -675,6 +675,12 @@ tests =
                       ] =?>
               Pandoc nullMeta mempty
 
+          , "disable creator export" =:
+              unlines [ "#+OPTIONS: creator:nil"
+                      , "#+creator: The Architect"
+                      ] =?>
+              Pandoc nullMeta mempty
+
           , "disable email export" =:
               unlines [ "#+OPTIONS: email:nil"
                       , "#+email: no-mail-please@example.com"