module Language.PureScript
( module P
, compile
, compile'
, RebuildPolicy(..)
, MonadMake(..)
, make
, prelude
, version
) where
import Data.FileEmbed (embedFile)
import Data.Function (on)
import Data.List (sortBy, groupBy, intercalate)
import Data.Maybe (fromMaybe)
import Data.Time.Clock
import Data.Version (Version)
import qualified Data.Traversable as T (traverse)
import qualified Data.ByteString.UTF8 as BU
import qualified Data.Map as M
import qualified Data.Set as S
import Control.Applicative
import Control.Arrow ((&&&))
import Control.Monad.Except
import Control.Monad.Reader
import System.FilePath ((</>))
import Language.PureScript.AST as P
import Language.PureScript.Comments as P
import Language.PureScript.CodeGen as P
import Language.PureScript.DeadCodeElimination as P
import Language.PureScript.Environment as P
import Language.PureScript.Errors as P
import Language.PureScript.Kinds as P
import Language.PureScript.ModuleDependencies as P
import Language.PureScript.Names as P
import Language.PureScript.Options as P
import Language.PureScript.Parser as P
import Language.PureScript.Pretty as P
import Language.PureScript.Renamer as P
import Language.PureScript.Sugar as P
import Control.Monad.Supply as P
import Language.PureScript.TypeChecker as P
import Language.PureScript.Types as P
import qualified Language.PureScript.CoreFn as CoreFn
import qualified Language.PureScript.Constants as C
import qualified Paths_purescript as Paths
compile :: (Functor m, Applicative m, MonadError MultipleErrors m, MonadReader (Options Compile) m)
=> [Module] -> [String] -> m (String, String, Environment)
compile = compile' initEnvironment
compile' :: (Functor m, Applicative m, MonadError MultipleErrors m, MonadReader (Options Compile) m)
=> Environment -> [Module] -> [String] -> m (String, String, Environment)
compile' env ms prefix = do
noPrelude <- asks optionsNoPrelude
additional <- asks optionsAdditional
mainModuleIdent <- asks (fmap moduleNameFromString . optionsMain)
(sorted, _) <- sortModules $ map importPrim $ if noPrelude then ms else map importPrelude ms
(desugared, nextVar) <- runSupplyT 0 $ desugar sorted
(elaborated, env') <- runCheck' env $ forM desugared $ typeCheckModule mainModuleIdent
regrouped <- createBindingGroupsModule . collapseBindingGroupsModule $ elaborated
let corefn = map (CoreFn.moduleToCoreFn env') regrouped
let entryPoints = moduleNameFromString `map` entryPointModules additional
let elim = if null entryPoints then corefn else eliminateDeadCode entryPoints corefn
let renamed = renameInModules elim
let codeGenModuleNames = moduleNameFromString `map` codeGenModules additional
let modulesToCodeGen = if null codeGenModuleNames then renamed else filter (\(CoreFn.Module _ mn _ _ _ _) -> mn `elem` codeGenModuleNames) renamed
js <- concat <$> (evalSupplyT nextVar $ T.traverse moduleToJs modulesToCodeGen)
let exts = intercalate "\n" . map (`moduleToPs` env') $ regrouped
js' <- generateMain env' js
let pjs = unlines $ map ("// " ++) prefix ++ [prettyPrintJS js']
return (pjs, exts, env')
generateMain :: (MonadError MultipleErrors m, MonadReader (Options Compile) m) => Environment -> [JS] -> m [JS]
generateMain env js = do
main <- asks optionsMain
additional <- asks optionsAdditional
case moduleNameFromString <$> main of
Just mmi -> do
when ((mmi, Ident C.main) `M.notMember` names env) $
throwError . errorMessage $ NameIsUndefined (Ident C.main)
return $ js ++ [JSApp (JSAccessor C.main (JSAccessor (moduleNameToJs mmi) (JSVar (browserNamespace additional)))) []]
_ -> return js
class (MonadReader (P.Options P.Make) m, MonadError MultipleErrors m) => MonadMake m where
getTimestamp :: FilePath -> m (Maybe UTCTime)
readTextFile :: FilePath -> m String
writeTextFile :: FilePath -> String -> m ()
progress :: String -> m ()
data RebuildPolicy
= RebuildNever
| RebuildAlways deriving (Show, Eq, Ord)
traverseEither :: Applicative f => (a -> f b) -> Either e a -> f (Either e b)
traverseEither _ (Left x) = pure (Left x)
traverseEither f (Right y) = Right <$> f y
make :: forall m. (Functor m, Applicative m, Monad m, MonadMake m)
=> FilePath -> [(Either RebuildPolicy FilePath, Module)] -> [String] -> m Environment
make outputDir ms prefix = do
noPrelude <- asks optionsNoPrelude
let filePathMap = M.fromList (map (\(fp, Module _ mn _ _) -> (mn, fp)) ms)
(sorted, graph) <- sortModules $ map importPrim $ if noPrelude then map snd ms else map (importPrelude . snd) ms
toRebuild <- foldM (\s (Module _ moduleName' _ _) -> do
let filePath = runModuleName moduleName'
jsFile = outputDir </> filePath </> "index.js"
externsFile = outputDir </> filePath </> "externs.purs"
inputFile = fromMaybe (error "Module has no filename in 'make'") $ M.lookup moduleName' filePathMap
jsTimestamp <- getTimestamp jsFile
externsTimestamp <- getTimestamp externsFile
inputTimestamp <- traverseEither getTimestamp inputFile
return $ case (inputTimestamp, jsTimestamp, externsTimestamp) of
(Right (Just t1), Just t2, Just t3) | t1 < min t2 t3 -> s
(Left RebuildNever, Just _, Just _) -> s
_ -> S.insert moduleName' s) S.empty sorted
marked <- rebuildIfNecessary (reverseDependencies graph) toRebuild sorted
(desugared, nextVar) <- runSupplyT 0 $ zip (map fst marked) <$> desugar (map snd marked)
evalSupplyT nextVar $ go initEnvironment desugared
where
go :: Environment -> [(Bool, Module)] -> SupplyT m Environment
go env [] = return env
go env ((False, m) : ms') = do
(_, env') <- lift . runCheck' env $ typeCheckModule Nothing m
go env' ms'
go env ((True, m@(Module coms moduleName' _ exps)) : ms') = do
let filePath = runModuleName moduleName'
jsFile = outputDir </> filePath </> "index.js"
externsFile = outputDir </> filePath </> "externs.purs"
lift . progress $ "Compiling " ++ runModuleName moduleName'
(Module _ _ elaborated _, env') <- lift . runCheck' env $ typeCheckModule Nothing m
regrouped <- createBindingGroups moduleName' . collapseBindingGroups $ elaborated
let mod' = Module coms moduleName' regrouped exps
let corefn = CoreFn.moduleToCoreFn env' mod'
let [renamed] = renameInModules [corefn]
pjs <- prettyPrintJS <$> moduleToJs renamed
let js = unlines $ map ("// " ++) prefix ++ [pjs]
let exts = unlines $ map ("-- " ++) prefix ++ [moduleToPs mod' env']
lift $ writeTextFile jsFile js
lift $ writeTextFile externsFile exts
go env' ms'
rebuildIfNecessary :: 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 = outputDir </> runModuleName moduleName' </> "externs.purs"
externs <- readTextFile externsFile
externsModules <- fmap (map snd) . either (throwError . errorMessage . ErrorParsingExterns) return $ P.parseModulesFromFiles id [(externsFile, externs)]
case externsModules of
[m'@(Module _ moduleName'' _ _)] | moduleName'' == moduleName' -> (:) (False, m') <$> rebuildIfNecessary graph toRebuild ms'
_ -> throwError . errorMessage . InvalidExternsFile $ externsFile
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)
addDefaultImport :: ModuleName -> Module -> Module
addDefaultImport toImport m@(Module coms mn decls exps) =
if isExistingImport `any` decls || mn == toImport then m
else Module coms mn (ImportDeclaration toImport Implicit Nothing : decls) exps
where
isExistingImport (ImportDeclaration mn' _ _) | mn' == toImport = True
isExistingImport (PositionedDeclaration _ _ d) = isExistingImport d
isExistingImport _ = False
importPrim :: Module -> Module
importPrim = addDefaultImport (ModuleName [ProperName C.prim])
importPrelude :: Module -> Module
importPrelude = addDefaultImport (ModuleName [ProperName C.prelude])
prelude :: String
prelude = BU.toString $(embedFile "prelude/prelude.purs")
version :: Version
version = Paths.version