module Language.PureScript (module P, compile, compile', MonadMake(..), make) where
import Language.PureScript.Types as P
import Language.PureScript.Kinds as P
import Language.PureScript.Declarations as P
import Language.PureScript.Names as P
import Language.PureScript.Parser as P
import Language.PureScript.CodeGen as P
import Language.PureScript.CodeGen.Common as P
import Language.PureScript.TypeChecker as P
import Language.PureScript.Pretty as P
import Language.PureScript.Sugar as P
import Language.PureScript.Options as P
import Language.PureScript.ModuleDependencies as P
import Language.PureScript.Environment as P
import Language.PureScript.Errors as P
import Language.PureScript.DeadCodeElimination as P
import qualified Language.PureScript.Constants as C
import Data.List (find, sortBy, groupBy, intercalate)
import Data.Time.Clock
import Data.Function (on)
import Data.Generics (mkQ, everything)
import Data.Maybe (fromMaybe, mapMaybe)
import Control.Monad.Error
import Control.Monad.State.Lazy
import Control.Arrow ((&&&))
import Control.Applicative ((<$>))
import qualified Data.Map as M
import qualified Data.Set as S
import System.FilePath (pathSeparator)
compile :: Options -> [Module] -> Either String (String, String, Environment)
compile = compile' initEnvironment
compile' :: Environment -> Options -> [Module] -> Either String (String, String, Environment)
compile' env opts ms = do
(sorted, _) <- sortModules $ if optionsNoPrelude opts then ms else (map importPrelude ms)
desugared <- stringifyErrorStack True $ desugar sorted
(elaborated, env') <- runCheck' opts env $ forM desugared $ typeCheckModule mainModuleIdent
regrouped <- stringifyErrorStack True $ createBindingGroupsModule . collapseBindingGroupsModule $ elaborated
let entryPoints = moduleNameFromString `map` optionsModules opts
let elim = if null entryPoints then regrouped else eliminateDeadCode entryPoints regrouped
let codeGenModules = moduleNameFromString `map` optionsCodeGenModules opts
let modulesToCodeGen = if null codeGenModules then elim else filter (\(Module mn _ _) -> mn `elem` codeGenModules) elim
let js = mapMaybe (flip (moduleToJs opts) env') modulesToCodeGen
let exts = intercalate "\n" . map (`moduleToPs` env') $ modulesToCodeGen
js' <- generateMain env' opts js
return (prettyPrintJS [wrapExportsContainer opts js'], exts, env')
where
mainModuleIdent = moduleNameFromString <$> optionsMain opts
typeCheckModule :: Maybe ModuleName -> Module -> Check Module
typeCheckModule mainModuleName (Module mn decls exps) = do
modify (\s -> s { checkCurrentModule = Just mn })
decls' <- typeCheckAll mainModuleName mn decls
mapM_ checkTypesAreExported exps'
return $ Module mn decls' exps
where
exps' = fromMaybe (error "exports should have been elaborated") exps
checkTypesAreExported :: DeclarationRef -> Check ()
checkTypesAreExported (ValueRef name) = do
ty <- lookupVariable mn (Qualified (Just mn) name)
case find isTconHidden (findTcons ty) of
Just hiddenType -> throwError . strMsg $
"Error in module '" ++ show mn ++ "':\n\
\Exporting declaration '" ++ show name ++ "' requires type '" ++ show hiddenType ++ "' to be exported as well"
Nothing -> return ()
checkTypesAreExported _ = return ()
findTcons :: Type -> [ProperName]
findTcons = everything (++) (mkQ [] go)
where
go (TypeConstructor (Qualified (Just mn') name)) | mn' == mn = [name]
go _ = []
isTconHidden :: ProperName -> Bool
isTconHidden tyName = all go exps'
where
go (TypeRef tyName' _) = tyName' /= tyName
go _ = True
generateMain :: Environment -> Options -> [JS] -> Either String [JS]
generateMain env opts js =
case moduleNameFromString <$> optionsMain opts of
Just mmi -> do
when ((mmi, Ident C.main) `M.notMember` names env) $
Left $ show mmi ++ "." ++ C.main ++ " is undefined"
return $ js ++ [JSApp (JSAccessor C.main (JSAccessor (moduleNameToJs mmi) (JSVar C._ps))) []]
_ -> return js
class MonadMake m where
getTimestamp :: FilePath -> m (Maybe UTCTime)
readTextFile :: FilePath -> m String
writeTextFile :: FilePath -> String -> m ()
liftError :: Either String a -> m a
make :: (Functor m, Monad m, MonadMake m) => Options -> [(FilePath, Module)] -> m ()
make opts ms = do
let filePathMap = M.fromList (map (\(fp, Module mn _ _) -> (mn, fp)) ms)
(sorted, graph) <- liftError $ sortModules $ if optionsNoPrelude opts then map snd ms else (map (importPrelude . snd) ms)
toRebuild <- foldM (\s (Module moduleName' _ _) -> do
let filePath = toFileName moduleName'
jsFile = "js" ++ pathSeparator : filePath ++ ".js"
externsFile = "externs" ++ pathSeparator : filePath ++ ".externs"
inputFile = fromMaybe (error "Input file is undefined in make") $ M.lookup moduleName' filePathMap
jsTimestamp <- getTimestamp jsFile
externsTimestamp <- getTimestamp externsFile
inputTimestamp <- getTimestamp inputFile
return $ case (inputTimestamp, jsTimestamp, externsTimestamp) of
(Just t1, Just t2, Just t3) | t1 < min t2 t3 -> s
_ -> S.insert moduleName' s) S.empty sorted
marked <- rebuildIfNecessary (reverseDependencies graph) toRebuild sorted
desugared <- liftError $ stringifyErrorStack True $ zip (map fst marked) <$> desugar (map snd marked)
go initEnvironment desugared
where
go :: (Functor m, Monad m, MonadMake m) => Environment -> [(Bool, Module)] -> m ()
go _ [] = return ()
go env ((False, m) : ms') = do
(_, env') <- liftError . runCheck' opts env $ typeCheckModule Nothing m
go env' ms'
go env ((True, m@(Module moduleName' _ exps)) : ms') = do
let filePath = toFileName moduleName'
jsFile = "js" ++ pathSeparator : filePath ++ ".js"
externsFile = "externs" ++ pathSeparator : filePath ++ ".externs"
(Module _ elaborated _, env') <- liftError . runCheck' opts env $ typeCheckModule Nothing m
regrouped <- liftError . stringifyErrorStack True . createBindingGroups moduleName' . collapseBindingGroups $ elaborated
let mod' = Module moduleName' regrouped exps
js = moduleToJs opts mod' env'
exts = moduleToPs mod' env'
js' = maybe "" (prettyPrintJS . return . wrapExportsContainer opts . return) js
writeTextFile jsFile js'
writeTextFile externsFile exts
go env' ms'
toFileName :: ModuleName -> FilePath
toFileName (ModuleName ps) = intercalate [pathSeparator] . map runProperName $ ps
rebuildIfNecessary :: (Functor m, Monad m, MonadMake m) => M.Map ModuleName [ModuleName] -> S.Set ModuleName -> [Module] -> m [(Bool, Module)]
rebuildIfNecessary _ _ [] = return []
rebuildIfNecessary graph toRebuild (m@(Module moduleName' _ _) : ms) | moduleName' `S.member` toRebuild = do
let deps = fromMaybe [] $ moduleName' `M.lookup` graph
toRebuild' = toRebuild `S.union` S.fromList deps
(:) (True, m) <$> rebuildIfNecessary graph toRebuild' ms
rebuildIfNecessary graph toRebuild (Module moduleName' _ _ : ms) = do
let externsFile = "externs" ++ pathSeparator : toFileName moduleName' ++ ".externs"
externs <- readTextFile externsFile
externsModules <- liftError . either (Left . show) Right $ P.runIndentParser externsFile P.parseModules externs
case externsModules of
[m'@(Module moduleName'' _ _)] | moduleName'' == moduleName' -> (:) (False, m') <$> rebuildIfNecessary graph toRebuild ms
_ -> liftError . Left $ "Externs file " ++ externsFile ++ " was invalid"
reverseDependencies :: ModuleGraph -> M.Map ModuleName [ModuleName]
reverseDependencies g = combine [ (dep, mn) | (mn, deps) <- g, dep <- deps ]
where
combine :: (Ord a) => [(a, b)] -> M.Map a [b]
combine = M.fromList . map ((fst . head) &&& map snd) . groupBy ((==) `on` fst) . sortBy (compare `on` fst)
importPrelude :: Module -> Module
importPrelude m@(Module mn decls exps) =
if isPreludeImport `any` decls || mn == prelude then m
else Module mn (preludeImport : decls) exps
where
prelude = ModuleName [ProperName C.prelude]
isPreludeImport (ImportDeclaration (ModuleName [ProperName mn']) _ _) | mn' == C.prelude = True
isPreludeImport (PositionedDeclaration _ d) = isPreludeImport d
isPreludeImport _ = False
preludeImport = ImportDeclaration prelude Nothing Nothing