{-# LANGUAGE DataKinds #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeApplications #-}
module Axel.Haskell.File where
import Prelude hiding (putStr, putStrLn)
import Axel.AST (ToHaskell(toHaskell))
import Axel.Eff.Console (putStrLn)
import qualified Axel.Eff.Console as Effs (Console)
import qualified Axel.Eff.FileSystem as Effs (FileSystem)
import qualified Axel.Eff.FileSystem as FS
( readFile
, withTemporaryDirectory
, writeFile
)
import Axel.Eff.Process (StreamSpecification(InheritStreams))
import qualified Axel.Eff.Process as Effs (Process)
import Axel.Eff.Resource (readResource)
import qualified Axel.Eff.Resource as Effs (Resource)
import qualified Axel.Eff.Resource as Res (astDefinition)
import Axel.Error (Error)
import Axel.Haskell.Prettify (prettifyHaskell)
import Axel.Haskell.Stack (interpretFile)
import Axel.Macros (exhaustivelyExpandMacros)
import Axel.Normalize (normalizeStatement)
import Axel.Parse (Expression(Symbol), parseSource)
import Axel.Utils.Recursion (Recursive(bottomUpFmap))
import Control.Lens.Operators ((.~))
import Control.Monad (void)
import Control.Monad.Freer (Eff, Members)
import qualified Control.Monad.Freer.Error as Effs (Error)
import Data.Maybe (fromMaybe)
import Data.Semigroup ((<>))
import qualified Data.Text as T (isSuffixOf, pack)
import System.FilePath ((</>), stripExtension, takeFileName)
import System.FilePath.Lens (directory)
convertList :: Expression -> Expression
convertList =
bottomUpFmap $ \case
Symbol "List" -> Symbol "[]"
x -> x
convertUnit :: Expression -> Expression
convertUnit =
bottomUpFmap $ \case
Symbol "Unit" -> Symbol "()"
Symbol "unit" -> Symbol "()"
x -> x
transpileSource ::
(Members '[ Effs.Console, Effs.Error Error, Effs.FileSystem, Effs.Process, Effs.Resource] effs)
=> String
-> Eff effs String
transpileSource source =
prettifyHaskell . toHaskell <$>
(parseSource source >>= exhaustivelyExpandMacros . convertList . convertUnit >>=
normalizeStatement)
axelPathToHaskellPath :: FilePath -> FilePath
axelPathToHaskellPath axelPath =
let basePath =
if ".axel" `T.isSuffixOf` T.pack axelPath
then fromMaybe axelPath $ stripExtension ".axel" axelPath
else axelPath
in basePath <> ".hs"
transpileFile ::
(Members '[ Effs.Console, Effs.Error Error, Effs.FileSystem, Effs.Process, Effs.Resource] effs)
=> FilePath
-> FilePath
-> Eff effs ()
transpileFile path newPath = do
fileContents <- FS.readFile path
newContents <- transpileSource fileContents
putStrLn "Writing file..."
FS.writeFile newPath newContents
transpileFile' ::
(Members '[ Effs.Console, Effs.Error Error, Effs.FileSystem, Effs.Process, Effs.Resource] effs)
=> FilePath
-> Eff effs FilePath
transpileFile' path = do
let newPath = axelPathToHaskellPath path
transpileFile path newPath
pure newPath
evalFile ::
(Members '[ Effs.Console, Effs.Error Error, Effs.FileSystem, Effs.Process, Effs.Resource] effs)
=> FilePath
-> Eff effs ()
evalFile path = do
putStrLn ("Building " <> takeFileName path <> "...")
FS.withTemporaryDirectory $ \tempDirectoryPath -> do
let astDefinitionPath = tempDirectoryPath </> "Axel.hs"
readResource Res.astDefinition >>= FS.writeFile astDefinitionPath
let newPath = directory .~ tempDirectoryPath $ axelPathToHaskellPath path
transpileFile path newPath
putStrLn ("Running " <> takeFileName path <> "...")
void $ interpretFile @'InheritStreams newPath