purescript-0.9.2: psc-ide-client/Main.hs

{-# LANGUAGE OverloadedStrings #-}
module Main where

import           Prelude             ()
import           Prelude.Compat

import           Control.Exception
import qualified Data.ByteString.Char8 as BS8
import qualified Data.Text.IO          as T
import           Data.Version          (showVersion)
import           Network
import           Options.Applicative
import           System.Exit
import           System.IO

import qualified Paths_purescript      as Paths

data Options = Options
  { optionsPort :: PortID
  }

main :: IO ()
main = do
    Options port <- execParser opts
    client port
  where
    parser =
        Options <$>
        (PortNumber . fromIntegral <$>
         option auto (long "port" <> short 'p' <> value (4242 :: Integer)))
    opts = info (version <*> helper <*> parser) mempty
    version = abortOption (InfoMsg (showVersion Paths.version)) $ long "version" <> help "Show the version number" <> hidden

client :: PortID -> IO ()
client port = do
    h <-
        connectTo "127.0.0.1" port `catch`
        (\(SomeException e) ->
              putStrLn
                  ("Couldn't connect to psc-ide-server on port: " ++
                   show port ++ " Error: " ++ show e) >>
              exitFailure)
    T.hPutStrLn h =<< T.getLine
    BS8.putStrLn =<< BS8.hGetLine h
    hFlush stdout
    hClose h