{-# LANGUAGE RecordWildCards #-}

module Ormolu.Utils.Fixity
  ( getFixityOverridesForSourceFile,
    parseFixityDeclarationStr,
  )
where

import Control.Exception (throwIO)
import Control.Monad.IO.Class
import Data.Bifunctor (first)
import Data.IORef
import Data.Map.Strict (Map)
import qualified Data.Map.Strict as Map
import qualified Data.Text as T
import Ormolu.Exception
import Ormolu.Fixity
import Ormolu.Fixity.Parser
import Ormolu.Utils.Cabal
import Ormolu.Utils.IO (readFileUtf8)
import System.Directory
import System.FilePath
import System.IO.Unsafe (unsafePerformIO)
import Text.Megaparsec (errorBundlePretty)

-- | Cache ref that stores fixity overrides per cabal file.
cacheRef :: IORef (Map FilePath FixityMap)
cacheRef :: IORef (Map FilePath FixityMap)
cacheRef = forall a. IO a -> a
unsafePerformIO (forall a. a -> IO (IORef a)
newIORef forall k a. Map k a
Map.empty)
{-# NOINLINE cacheRef #-}

-- | Attempt to locate and parse an @.ormolu@ file. If it does not exist,
-- empty fixity map is returned. This function maintains a cache of fixity
-- overrides where cabal file paths act as keys.
getFixityOverridesForSourceFile ::
  (MonadIO m) =>
  -- | 'CabalInfo' already obtained for this source file
  CabalInfo ->
  m FixityMap
getFixityOverridesForSourceFile :: forall (m :: * -> *). MonadIO m => CabalInfo -> m FixityMap
getFixityOverridesForSourceFile CabalInfo {FilePath
[DynOption]
PackageName
Set PackageName
ciCabalFilePath :: CabalInfo -> FilePath
ciDependencies :: CabalInfo -> Set PackageName
ciDynOpts :: CabalInfo -> [DynOption]
ciPackageName :: CabalInfo -> PackageName
ciCabalFilePath :: FilePath
ciDependencies :: Set PackageName
ciDynOpts :: [DynOption]
ciPackageName :: PackageName
..} = forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO forall a b. (a -> b) -> a -> b
$ do
  Map FilePath FixityMap
cache <- forall a. IORef a -> IO a
readIORef IORef (Map FilePath FixityMap)
cacheRef
  case forall k a. Ord k => k -> Map k a -> Maybe a
Map.lookup FilePath
ciCabalFilePath Map FilePath FixityMap
cache of
    Maybe FixityMap
Nothing -> do
      let dotOrmolu :: FilePath
dotOrmolu = FilePath -> FilePath -> FilePath
replaceFileName FilePath
ciCabalFilePath FilePath
".ormolu"
      Bool
exists <- FilePath -> IO Bool
doesFileExist FilePath
dotOrmolu
      if Bool
exists
        then do
          FilePath
dotOrmoluRelative <- FilePath -> IO FilePath
makeRelativeToCurrentDirectory FilePath
dotOrmolu
          Text
contents <- forall (m :: * -> *). MonadIO m => FilePath -> m Text
readFileUtf8 FilePath
dotOrmolu
          case FilePath -> Text -> Either (ParseErrorBundle Text Void) FixityMap
parseFixityMap FilePath
dotOrmoluRelative Text
contents of
            Left ParseErrorBundle Text Void
errorBundle ->
              forall e a. Exception e => e -> IO a
throwIO (ParseErrorBundle Text Void -> OrmoluException
OrmoluFixityOverridesParseError ParseErrorBundle Text Void
errorBundle)
            Right FixityMap
x -> do
              forall a. IORef a -> (a -> a) -> IO ()
modifyIORef' IORef (Map FilePath FixityMap)
cacheRef (forall k a. Ord k => k -> a -> Map k a -> Map k a
Map.insert FilePath
ciCabalFilePath FixityMap
x)
              forall (m :: * -> *) a. Monad m => a -> m a
return FixityMap
x
        else forall (m :: * -> *) a. Monad m => a -> m a
return forall k a. Map k a
Map.empty
    Just FixityMap
x -> forall (m :: * -> *) a. Monad m => a -> m a
return FixityMap
x

-- | A wrapper around 'parseFixityDeclaration' for parsing individual fixity
-- definitions.
parseFixityDeclarationStr ::
  -- | Input to parse
  String ->
  -- | Parse result
  Either String [(OpName, FixityInfo)]
parseFixityDeclarationStr :: FilePath -> Either FilePath [(OpName, FixityInfo)]
parseFixityDeclarationStr =
  forall (p :: * -> * -> *) a b c.
Bifunctor p =>
(a -> b) -> p a c -> p b c
first forall s e.
(VisualStream s, TraversableStream s, ShowErrorComponent e) =>
ParseErrorBundle s e -> FilePath
errorBundlePretty forall b c a. (b -> c) -> (a -> b) -> a -> c
. Text -> Either (ParseErrorBundle Text Void) [(OpName, FixityInfo)]
parseFixityDeclaration forall b c a. (b -> c) -> (a -> b) -> a -> c
. FilePath -> Text
T.pack