added all-filter which combines all filters into one ;)

app/All.hs

@@ -0,0 +1,30 @@
+#!/usr/bin/env runhaskell
+{-# LANGUAGE ScopedTypeVariables #-}
+
+import Control.Monad
+import Text.Pandoc.JSON
+import Text.Pandoc.Walk
+import Text.Pandoc.Generic
+import Text.Pandoc.Util.Filter.Quiz
+import Text.Pandoc.Util.Filter.Cols
+import Text.Pandoc.Util.Filter.Media
+import Text.Pandoc.Util.Filter.Styling
+
+main :: IO ()
+main = toJSONFilter $
+    fmap (walk (concatMap quiz) :: Pandoc -> Pandoc) .
+    (walkM (fmap concat . mapM styling) :: Pandoc -> IO Pandoc) <=<
+    (walkM (fmap concat . mapM media) :: Pandoc -> IO Pandoc) .
+    (walk (concatMap quiz) :: Pandoc -> Pandoc) .
+    (topDown cols :: Pandoc -> Pandoc)
+
+clean :: Block -> [Block]
+clean (Plain          []) = []
+clean (Para           []) = []
+clean (LineBlock      []) = []
+clean (BlockQuote     []) = []
+clean (OrderedList _  []) = []
+clean (BulletList     []) = []
+clean (DefinitionList []) = []
+clean x                   = [x]
+

pandoc-slide-filter.cabal

@@ -13,6 +13,15 @@ build-type:          Simple
 extra-source-files:  README.md
 cabal-version:       >=1.10
 
+executable all
+  hs-source-dirs:      app
+  main-is:             All.hs
+  ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+  build-depends:       base
+                     , pandoc-types
+                     , pandoc-slide-filter
+  default-language:    Haskell2010
+
 executable media
   hs-source-dirs:      app
   main-is:             Media.hs

stack.yaml

@@ -15,7 +15,7 @@
 # resolver:
 #  name: custom-snapshot
 #  location: "./custom-snapshot.yaml"
-resolver: lts-9.1
+resolver: lts-11.9
 
 # User packages to be built.
 # Various formats can be used as shown in the example below.