{-# LANGUAGE TemplateHaskell #-}


module Version ( version ) where

import           Control.Monad.Trans (liftIO)
import qualified Language.Haskell.TH as TH
import           System.Process      (readProcess)
import GHC.IO (catchAny)

version :: String
version = "walint rc3 2021 (" <>
    $(do
        hash <- liftIO $ catchAny (readProcess "git" ["rev-parse", "HEAD"] "")
                         (\_ -> pure "[unknown]")
        pure . TH.LitE . TH.StringL $ take 40 hash) ++
    ")"