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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE TypeFamilies #-}
module Hsm.Command.Readline
( Readline
, readline
, runReadline
) where
import Effectful (Dispatch(Static), DispatchOf, Eff, IOE, (:>))
import Effectful.Dispatch.Static qualified as S
import Effectful.Log (Log)
import Effectful.Resource (Resource, allocate)
import Hsm.Core.Log (flushLogger)
import System.Console.Haskeline qualified as H
import System.Console.Haskeline.IO qualified as H
data Readline a b
type instance DispatchOf Readline = Static S.WithSideEffects
newtype instance S.StaticRep Readline =
Readline H.InputState
readline :: (Log :> es, Readline :> es) => Eff es (Maybe String)
readline = do
flushLogger
Readline hdl <- S.getStaticRep
S.unsafeEff_
$ H.queryInput hdl
$ H.handleInterrupt (return Nothing)
$ H.withInterrupt
$ H.getInputLine "% "
runReadline :: (IOE :> es, Resource :> es) => Eff (Readline : es) a -> Eff es a
runReadline action = do
handle <- snd <$> allocate (H.initializeInput settings) H.cancelInput
S.evalStaticRep (Readline handle) action
where
settings = H.defaultSettings {H.historyFile = Just ".hsm_command_history"}
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