remove hakyll from deps

Closes #12

1 files changed, 41 insertions, 1 deletions

diff --git a/Utils.hs b/Utils.hs
index cb21de1..4426b68 100644
--- a/Utils.hs
+++ b/Utils.hs
@@ -17,13 +17,19 @@
 
 module Utils where
 
+import Control.Monad (filterM, forM)
 import Control.Monad.IO.Class
 import Data.List.Extra (stripSuffix)
 import Data.Maybe (isJust)
 import qualified Data.Text as T
+import System.Directory
+  ( createDirectoryIfMissing
+  , doesDirectoryExist
+  , getDirectoryContents
+  )
+import System.FilePath ((</>), takeDirectory)
 import Text.Pandoc.Definition
 import qualified Text.Pandoc.Walk
-
 import Types
 
 -- | A shortcut for `liftIO`.
@@ -72,11 +78,45 @@ addHeadingLinks cls = Text.Pandoc.Walk.walk go
          [Link ("", [cls], []) [Str "#"] ("#" <> id, "Link to this section")])
     go x = x
 
+-- | @"https://example.com" `hasUriScheme` "https"@
 hasUriScheme :: String -> String -> Bool
 hasUriScheme x = all id . zipWith (==) x . (++ ":")
 
+-- | @unAbsolute "/root/path" == "root/path"@
 unAbsolute :: String -> String
 unAbsolute = dropWhile (== '/')
 
+-- | Lift a function that processes `Block`s to a function that -- processes a
+-- `Pandoc`.
 withPandocBlocks :: ([Block] -> [Block]) -> Pandoc -> Pandoc
 withPandocBlocks f (Pandoc meta blocks) = Pandoc meta (f blocks)
+
+-- | Get all contents of a directory. (Interned from Hakyll.)
+getRecursiveContents ::
+     (FilePath -> IO Bool) -- ^ Ignore this file/directory
+  -> FilePath -- ^ Directory to search
+  -> IO [FilePath] -- ^ List of files found
+getRecursiveContents ignore top = go ""
+  where
+    isProper x
+      | x `elem` [".", ".."] = return False
+      | otherwise = not <$> ignore x
+    go dir = do
+      dirExists <- doesDirectoryExist (top </> dir)
+      if not dirExists
+        then return []
+        else do
+          names <- filterM isProper =<< getDirectoryContents (top </> dir)
+          paths <-
+            forM names $ \name -> do
+              let rel = dir </> name
+              isDirectory <- doesDirectoryExist (top </> rel)
+              if isDirectory
+                then go rel
+                else return [rel]
+          return $ concat paths
+
+-- | Given a path to a file, try to make the path writable by making all
+-- directories on the path. (Interned from Hakyll.)
+makeDirectories :: FilePath -> IO ()
+makeDirectories = createDirectoryIfMissing True . takeDirectory