more pure code refactoring

CmdLine.hs

@@ -101,5 +101,4 @@ shutdown = do
 	unless (q == GitQueue.empty) $ do
 		showSideAction "Recording state in git..."
 		Annex.queueRun
-
 	return True

Command.hs

@@ -184,17 +184,20 @@ filterFiles l = do
 	if null exclude
 		then return l'
 		else do
-			let regexp = compile (toregex exclude) []
+			let regexp = compile (wildsRegex exclude) []
 			return $ filter (notExcluded regexp) l'
 	where
 		notState f = not $ stateDir `isPrefixOf` f
 		notExcluded r f = case match r f [] of
 			Nothing -> True
 			Just _ -> False
-		toregex exclude = "^(" ++ toregex' exclude "" ++ ")"
+
-		toregex' [] c = c
+wildsRegex :: [String] -> String
-		toregex' (w:ws) "" = toregex' ws (wildToRegex w)
+wildsRegex ws = "^(" ++ wildsRegex' ws "" ++ ")"
-		toregex' (w:ws) c = toregex' ws (c ++ "|" ++ wildToRegex w)
+wildsRegex' :: [String] -> String -> String
+wildsRegex' [] c = c
+wildsRegex' (w:ws) "" = wildsRegex' ws (wildToRegex w)
+wildsRegex' (w:ws) c = wildsRegex' ws (c ++ "|" ++ wildToRegex w)
 
 {- filter out symlinks -}	
 notSymlink :: FilePath -> IO Bool

LocationLog.hs

@@ -104,11 +104,15 @@ readLog file = do
 	if exists
 		then do
 			s <- readFile file
-			-- filter out any unparsable lines
+			return $ parseLog s
-			return $ filter (\l -> status l /= Undefined )
-				$ map read $ lines s
 		else return []
 
+parseLog :: String -> [LogLine]
+parseLog s = filter parsable $ map read $ lines s
+	where
+		-- some lines may be unparseable, avoid them
+		parsable l = status l /= Undefined
+
 {- Writes a set of lines to a log file -}
 writeLog :: FilePath -> [LogLine] -> IO ()
 writeLog file ls = safeWriteFile file (unlines $ map show ls)