File: CustomOption.hs

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haskell-getopt-generics 0.13.1.0-3
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{-# LANGUAGE DeriveDataTypeable #-}

module CustomOption where

import WithCli

data File = File FilePath
  deriving (Show, Typeable)

instance Argument File where
  argumentType Proxy = "custom-file-type"
  parseArgument f = Just (File f)

instance HasArguments File where
  argumentsParser = atomicArgumentsParser

main :: IO ()
main = withCli run

run :: File -> IO ()
run = print