systemd-socket-activation-1.0.0.2: src/SocketActivation.hs

module SocketActivation
    (
        {- * Actions -} getMySocketByName,
        {- * Types -} Name (..), VarName (..), Socket, Error (..),
    )
    where

import Control.Applicative (Applicative ((*>)))
import Control.Monad (Monad (return, (>>=)))
import Data.Either (Either, either)
import System.IO (IO, print)

import qualified Control.Exception as Ex

import qualified SocketActivation.CheckRecipient as SA
import qualified SocketActivation.Env as SA
import qualified SocketActivation.GetByName as SA

import SocketActivation.Concepts
    (Socket, Error (..), VarName (..), Name (..))

getMySocketByName :: Name -> IO Socket
getMySocketByName name = f SA.checkRecipient *> f (SA.getSocketByName name)
  where
    f :: IO (Either Error a) -> IO a
    f = (>>= either (\e -> (SA.getEnvVars >>= print) *> Ex.throw e) return)