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module Main (main) where
import System.Environment
import Control.Monad.Except
import Control.Monad.Reader
import Types
import Lib
parseArgs :: Config -> [String] -> Config
parseArgs config args =
case args of
("-i":fileName:rest) -> parseArgs
config { configScriptFileName = Just fileName } rest
("-v":rest) -> parseArgs
config { configVerboseMode = True } rest
("-h":rest) -> parseArgs
config { configShowHelp = True } rest
_ -> config
main :: IO ()
main = do
args <- getArgs
progName <- getProgName
let initialConfig = Config {
configScriptFileName = Nothing,
configVerboseMode = False,
configShowHelp = False
}
let config = parseArgs initialConfig args
if (configShowHelp config) then do
putStrLn $ "Usage: " ++ progName ++ " # to open REPL"
putStrLn $ " " ++ progName ++ " -i scriptFile # to run script file"
putStrLn $ " " ++ progName ++ " -h # to show this help"
else do
when (configVerboseMode config) $ do
putStrLn $ "configScriptFileName:\t" ++ (show $ configScriptFileName config)
putStrLn $ "configVerboseMode:\t" ++ (show $ configVerboseMode config)
case (configScriptFileName config) of
Just scriptFileName -> do
result <- runExceptT $ runReaderT (runScriptFile scriptFileName) config
case result of
Left (LException ex) -> putStrLn $ "Error: " ++ ex
Right () -> return ()
Nothing -> error "TODO REPL"
return ()
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