urbit/pkg/hs/urbit-king/test/Options.hs
2020-12-15 13:46:26 -08:00

49 lines
1.2 KiB
Haskell

module Options
( Brass
, Pill
, getPillPath
) where
import Control.Monad.IO.Class (MonadIO)
import Data.Proxy (Proxy (Proxy))
import Data.String (IsString)
import GHC.TypeLits (KnownSymbol, Symbol)
import Prelude
import qualified GHC.TypeLits as TypeLits
import qualified RIO.Directory as Directory
import qualified Test.Tasty as Tasty
import qualified Test.Tasty.Options as Options
type Brass = Pill "brass"
-- | A file-system path tagged by the pill name.
newtype Pill (name :: Symbol) = Pill FilePath
deriving stock (Eq, Show)
deriving newtype (IsString)
instance KnownSymbol name => Options.IsOption (Pill name) where
optionName =
pure ( TypeLits.symbolVal (Proxy @name)
++ "-pill"
)
optionHelp =
pure ( "The file path to the "
++ TypeLits.symbolVal (Proxy @name)
++ " pill"
)
defaultValue =
Pill ( "../../../bin/"
++ TypeLits.symbolVal (Proxy @name)
++ ".pill"
)
parseValue = \case
"" -> Nothing
path -> Just (Pill path)
getPillPath :: MonadIO m => Pill name -> m FilePath
getPillPath (Pill path) = Directory.canonicalizePath path