Use package for modifying paths

mima-run/Main.hs

@@ -14,9 +14,9 @@ import           Mima.Vm.State
 import           Mima.Vm.Storage
 
 loadMetadataOrEmpty :: FilePath -> Run Metadata
-loadMetadataOrEmpty path = catch (loadMetadata path) (\error -> do
-  liftIO $ putStrLn $ "Metafile could not be loaded. " ++ T.unpack error
-  pure mempty)
+loadMetadataOrEmpty path = catch (loadMetadata path) $ \e -> do
+  liftIO $ putStrLn $ "Metafile could not be loaded. " ++ T.unpack e
+  pure mempty
 
 main :: IO ()
 main = runOrExit 2 $ do
@@ -38,5 +38,6 @@ main = runOrExit 2 $ do
         Nothing          -> putStrLn "Ran out of steps"
         Just abortReason -> T.putStrLn $ toText abortReason
       pure finalState
+
   liftIO $ putStrLn ""
   liftIO $ print finalState

mima-run/Mima/MimaRun/Options.hs

@@ -3,9 +3,9 @@ module Mima.MimaRun.Options
   , parserInfo
   ) where
 
-import           Data.List
 import           Data.Maybe
 import           Options.Applicative
+import           System.FilePath
 
 data Options = Options
   { inputFile    :: FilePath
@@ -14,11 +14,9 @@ data Options = Options
   } deriving (Show)
 
 createOptions :: FilePath -> Maybe FilePath -> Maybe Integer -> Options
-createOptions inFile metaFile = Options inFile resolvedMetadataFile
+createOptions inFile metaFile = Options inFile resolvedMetaFile
   where
-    inputRenamedToMeta = removeExtension inFile ++ "mima-meta"
-    resolvedMetadataFile = fromMaybe inputRenamedToMeta metaFile
-    removeExtension = dropWhileEnd (/= '.')
+    resolvedMetaFile = fromMaybe (replaceExtension inFile "mima-meta") metaFile
 
 parser :: Parser Options
 parser = createOptions
@@ -27,7 +25,7 @@ parser = createOptions
       <> metavar "INPUTFILE"
       )
   <*> (optional . strOption)
-      ( short 'm'
+      (  short 'm'
       <> long "metadata"
       <> help "The metadata file to use"
       <> metavar "METAFILE"
@@ -38,5 +36,6 @@ parser = createOptions
       <> help "Maximum number of steps to execute"
       <> metavar "STEPS"
       )
+
 parserInfo :: ParserInfo Options
 parserInfo = info (parser <**> helper) (failureCode 1)

package.yaml

@@ -19,6 +19,7 @@ dependencies:
   - binary
   - bytestring
   - containers
+  - filepath
   - optparse-applicative
   - text
   - transformers