72 lines
2 KiB
Haskell
72 lines
2 KiB
Haskell
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module Main where
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import Control.Monad (msum,guard)
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import Control.Monad.Trans (MonadIO(liftIO))
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import Data.List (isPrefixOf, isSuffixOf)
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import Data.Version (showVersion)
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import Happstack.Server
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import Happstack.Server.Compression
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import System.Environment
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import System.FilePath
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import qualified Language.Elm as Elm
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import Paths_elm_server
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runtime = "/elm-" ++ showVersion version ++ ".js"
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serve :: String -> IO ()
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serve libLoc = do
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putStrLn ("Elm Server " ++ showVersion version ++
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": running at <http://localhost:8000>")
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putStrLn "Just refresh a page to recompile it!"
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simpleHTTP nullConf $ do
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_ <- compressedResponseFilter
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msum [ uriRest serveElm
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, uriRest (serveLib libLoc)
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, serveDirectory EnableBrowsing [] "."
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]
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pageTitle :: String -> String
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pageTitle = dropExtension . takeBaseName
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serveElm fp = do
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guard (takeExtension fp == ".elm")
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content <- liftIO (readFile (tail fp))
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ok . toResponse $ Elm.toHtml runtime (pageTitle fp) content
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serveLib libLoc fp = do
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guard (fp == runtime)
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serveFile (asContentType "application/javascript") libLoc
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main :: IO ()
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main = getArgs >>= parse
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parse :: [String] -> IO ()
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parse ("--help":_) = putStrLn usage
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parse ("--version":_) = putStrLn ("The Elm Server " ++ showVersion version)
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parse [] = serve =<< Elm.runtime
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parse [arg]
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| "--runtime-location=" `isPrefixOf` arg =
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serve . tail $ dropWhile (/='=') arg
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| otherwise = putStrLn usageMini
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parse _ = putStrLn usageMini
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usageMini :: String
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usageMini =
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"Usage: elm-server [OPTIONS]\n\
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\Try `elm-server --help' for more information."
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usage :: String
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usage =
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"Usage: elm-server [OPTIONS]\n\
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\Compiles and serves .elm files from the current directory.\n\
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\Example: elm-server\n\
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\\n\
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\Resource Locations:\n\
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\ --runtime-location set the location of the Elm runtime\n\
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\\n\
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\Compiler Information:\n\
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\ --version print the version information and exit\n\
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\ --help display this help and exit\n\
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\\n\
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\Elm home page: <http://elm-lang.org>"
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