Refactor how automatic annotations are read

src/Annotator.hs

@@ -30,7 +30,7 @@ import Annotator.Rule
 import Annotator.Annotation
 
 version :: Vsn.Version
-version = Vsn.makeVersion [0,0,4,0]
+version = Vsn.makeVersion [0,0,4,1]
 
 type App a = ReaderT Options IO a
 

src/Annotator/Annotation.hs

@@ -2,7 +2,9 @@
 module Annotator.Annotation (Annotation(..), fromFile) where
 
 import Data.Char (isSpace)
+
 import Annotator.Rule
+import Annotator.Util
 
 data Annotation = Intentional !Rule !String
                 | FalsePositive !Rule !String
@@ -10,14 +12,14 @@ data Annotation = Intentional !Rule !String
                 deriving (Show, Read, Eq)
 
 fromFile :: FilePath -> IO [Either String Annotation]
-fromFile fn = fmap safeRead . removeBoring . lines <$> readFile fn
+fromFile fn = fmap safeRead . removeBoring . map (dropWhile isSpace) . lines <$> readFile fn
   where
     removeBoring :: [String] -> [String]
-    removeBoring = filter (not . isBoring)
+    removeBoring = filter (not . boring)
 
-    isBoring x = isComment x || isEmpty x
+    boring = anyp [comment, null]
-    isComment x = take 1 x == "#" || take 2 x == "--"
+    comment = anyp [startsWith "#", startsWith "--"]
-    isEmpty = null . dropWhile isSpace
+    startsWith prefix = (== prefix) . take (length prefix)
 
     safeRead :: String -> Either String Annotation
     safeRead s = case reads s of

src/Annotator/Util.hs

@@ -0,0 +1,4 @@
+module Annotator.Util where
+
+anyp :: [a -> Bool] -> a -> Bool
+anyp preds x = or (map ($ x) preds)