182 lines
6.7 KiB
Haskell
182 lines
6.7 KiB
Haskell
{-# LANGUAGE DeriveDataTypeable #-}
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module Main where
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import Control.Monad
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import qualified Data.Map as Map
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import qualified Data.List as List
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import qualified Data.Binary as Binary
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import Data.Version (showVersion)
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import System.Console.CmdArgs hiding (program)
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import System.Directory
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import System.Exit
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import System.FilePath
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import qualified Text.Blaze.Html.Renderer.Pretty as Pretty
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import qualified Text.Blaze.Html.Renderer.String as Normal
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import qualified Text.Jasmine as JS
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import qualified Data.ByteString.Lazy.Char8 as BS
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import qualified Metadata.Prelude as Prelude
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import SourceSyntax.Module
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import Initialize (buildFromSource, getSortedModuleNames, Interfaces)
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import Generate.JavaScript (jsModule)
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import Generate.Html (createHtml, JSStyle(..), JSSource(..))
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import Paths_Elm
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import SourceSyntax.PrettyPrint (pretty, variable)
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import Text.PrettyPrint as P
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import qualified Type.Type as Type
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import qualified Parse.Type as Parse
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import qualified Data.Traversable as Traverse
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data Flags =
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Flags { make :: Bool
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, files :: [FilePath]
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, runtime :: Maybe FilePath
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, only_js :: Bool
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, print_types :: Bool
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, print_program :: Bool
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, scripts :: [FilePath]
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, no_prelude :: Bool
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, minify :: Bool
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, output_directory :: FilePath
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}
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deriving (Data,Typeable,Show,Eq)
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flags = Flags
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{ make = False
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&= help "automatically compile dependencies."
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, files = def &= args &= typ "FILES"
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, runtime = Nothing &= typFile
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&= help "Specify a custom location for Elm's runtime system."
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, only_js = False
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&= help "Compile only to JavaScript."
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, print_types = False
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&= help "Print out infered types of top-level definitions."
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, print_program = False
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&= help "Print out an internal representation of a program."
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, scripts = [] &= typFile
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&= help "Load JavaScript files in generated HTML. Files will be included in the given order."
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, no_prelude = False
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&= help "Do not import Prelude by default, used only when compiling standard libraries."
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, minify = False
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&= help "Minify generated JavaScript and HTML"
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, output_directory = "ElmFiles" &= typFile
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&= help "Output files to directory specified. Defaults to ElmFiles/ directory."
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} &= help "Compile Elm programs to HTML, CSS, and JavaScript."
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&= summary ("The Elm Compiler " ++ showVersion version ++ ", (c) Evan Czaplicki")
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main :: IO ()
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main = compileArgs =<< cmdArgs flags
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compileArgs :: Flags -> IO ()
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compileArgs flags =
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case files flags of
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[] -> putStrLn "Usage: elm [OPTIONS] [FILES]\nFor more help: elm --help"
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fs -> mapM_ (build flags) fs
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file :: Flags -> FilePath -> String -> FilePath
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file flags filePath ext = output_directory flags </> replaceExtension filePath ext
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elmo :: Flags -> FilePath -> FilePath
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elmo flags filePath = file flags filePath "elmo"
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elmi flags filePath = file flags filePath "elmi"
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buildFile :: Flags -> Int -> Int -> Interfaces -> FilePath -> IO ModuleInterface
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buildFile flags moduleNum numModules interfaces filePath =
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do compiled <- alreadyCompiled
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if compiled then Binary.decodeFile (elmi flags filePath) else compile
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where
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alreadyCompiled :: IO Bool
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alreadyCompiled = do
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exists <- doesFileExist (elmo flags filePath)
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if not exists then return False
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else do tsrc <- getModificationTime filePath
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tint <- getModificationTime (elmo flags filePath)
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return (tsrc < tint)
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number :: String
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number = "[" ++ show moduleNum ++ " of " ++ show numModules ++ "]"
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name :: String
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name = List.intercalate "." (splitDirectories (dropExtensions filePath))
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compile :: IO ModuleInterface
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compile = do
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putStrLn (number ++ " Compiling " ++ name)
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source <- readFile filePath
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createDirectoryIfMissing True (output_directory flags)
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metaModule <-
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case buildFromSource interfaces source of
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Left err -> mapM print err >> exitFailure
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Right modul -> do
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if print_program flags then print . pretty $ program modul else return ()
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return modul
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if print_types flags then printTypes metaModule else return ()
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tipes <- toSrcTypes (types metaModule)
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let interface = ModuleInterface {
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iTypes = tipes,
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iAdts = datatypes metaModule
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}
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Binary.encodeFile (elmi flags filePath) interface
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let js = jsModule metaModule
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writeFile (elmo flags filePath) js
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return interface
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toSrcTypes tipes = Traverse.traverse convert tipes
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where
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convert t = fmap (Parse.readType . P.render) (Type.extraPretty t)
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printTypes metaModule = do
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putStrLn ""
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forM_ (Map.toList $ types metaModule) $ \(n,t) -> do
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pt <- Type.extraPretty t
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print $ variable n <+> P.text ":" <+> pt
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putStrLn ""
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getRuntime :: Flags -> IO FilePath
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getRuntime flags =
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case runtime flags of
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Just fp -> return fp
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Nothing -> getDataFileName "elm-runtime.js"
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build :: Flags -> FilePath -> IO ()
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build flags rootFile = do
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files <- if make flags then getSortedModuleNames rootFile else return [rootFile]
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interfaces <- buildFiles flags (length files) Prelude.interfaces files
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js <- foldM appendToOutput "" files
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case only_js flags of
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True -> do
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putStr "Generating JavaScript ... "
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writeFile (file flags rootFile "js") (genJs js)
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putStrLn "Done"
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False -> do
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putStr "Generating HTML ... "
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runtime <- getRuntime flags
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let html = genHtml $ createHtml runtime rootFile (sources js) ""
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writeFile (file flags rootFile "html") html
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putStrLn "Done"
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where
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appendToOutput :: String -> FilePath -> IO String
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appendToOutput js filePath =
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do src <- readFile (elmo flags filePath)
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return (src ++ js)
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genHtml = if minify flags then Normal.renderHtml else Pretty.renderHtml
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genJs = if minify flags then BS.unpack . JS.minify . BS.pack else id
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sources js = map Link (scripts flags) ++
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[ Source (if minify flags then Minified else Readable) js ]
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buildFiles :: Flags -> Int -> Interfaces -> [FilePath] -> IO Interfaces
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buildFiles _ _ interfaces [] = return interfaces
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buildFiles flags numModules interfaces (filePath:rest) = do
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interface <- buildFile flags (numModules - length rest) numModules interfaces filePath
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let moduleName = List.intercalate "." (splitDirectories (dropExtensions filePath))
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interfaces' = Map.insert moduleName interface interfaces
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buildFiles flags numModules interfaces' rest
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