Distribution/Types/Executable.hs

    {-# LANGUAGE DeriveDataTypeable #-}
    {-# LANGUAGE DeriveGeneric #-}

    module Distribution.Types.Executable (
        Executable(..),
        emptyExecutable,
        exeModules,
        exeModulesAutogen
    ) where

    import Prelude ()
    import Distribution.Compat.Prelude

    import Distribution.Types.BuildInfo
    import Distribution.Types.UnqualComponentName
    import Distribution.ModuleName

    data Executable = Executable {
            exeName    :: UnqualComponentName,
            modulePath :: FilePath,
            buildInfo  :: BuildInfo
        }
        deriving (Generic, Show, Read, Eq, Typeable, Data)

    instance Binary Executable

    instance Monoid Executable where
      mempty = gmempty
      mappend = (<>)

    instance Semigroup Executable where
      a <> b = Executable{
        exeName    = combine' exeName,
        modulePath = combine modulePath,
        buildInfo  = combine buildInfo
      }
        where combine field = field a `mappend` field b
              combine' field = case ( unUnqualComponentName $ field a
                                    , unUnqualComponentName $ field b) of
                          ("", _) -> field b
                          (_, "") -> field a
                          (x, y) -> error $ "Ambiguous values for executable field: '"
                                      ++ x ++ "' and '" ++ y ++ "'"

    emptyExecutable :: Executable
    emptyExecutable = mempty

    -- | Get all the module names from an exe
    exeModules :: Executable -> [ModuleName]
    exeModules exe = otherModules (buildInfo exe)

    -- | Get all the auto generated module names from an exe
    -- This are a subset of 'exeModules'.
    exeModulesAutogen :: Executable -> [ModuleName]
    exeModulesAutogen exe = autogenModules (buildInfo exe)