guix/gnu/packages/patches/idris-build-with-haskeline-0.8.patch

From 89a87cf666eb8b27190c779e72d0d76eadc1bc14 Mon Sep 17 00:00:00 2001
From: Niklas Larsson <niklas@mm.st>
Date: Sat, 6 Jun 2020 15:29:45 +0200
Subject: [PATCH] Fix to unblock haskeline-0.8

---
Taken from <https://github.com/idris-lang/Idris-dev/pull/4871>

 idris.cabal         |  2 +-
 src/Idris/Output.hs |  8 --------
 src/Idris/REPL.hs   | 12 +++++-------
 3 files changed, 6 insertions(+), 16 deletions(-)

diff --git a/idris.cabal b/idris.cabal
index 38359019a9..bc9e265023 100644
--- a/idris.cabal
+++ b/idris.cabal
@@ -336,7 +336,7 @@ Library
                 , directory >= 1.2.2.0 && < 1.2.3.0 || > 1.2.3.0
                 , filepath < 1.5
                 , fingertree >= 0.1.4.1 && < 0.2
-                , haskeline >= 0.7 && < 0.8
+                , haskeline >= 0.8 && < 0.9
                 , ieee754 >= 0.7 && < 0.9
                 , megaparsec >= 7.0.4 && < 9
                 , mtl >= 2.1 && < 2.3
diff --git a/src/Idris/Output.hs b/src/Idris/Output.hs
index 70b4d48a30..6b5d59948c 100644
--- a/src/Idris/Output.hs
+++ b/src/Idris/Output.hs
@@ -37,21 +37,13 @@ import Prelude hiding ((<$>))
 #endif
 
 import Control.Arrow (first)
-import Control.Monad.Trans.Except (ExceptT(ExceptT), runExceptT)
 import Data.List (intersperse, nub)
 import Data.Maybe (fromJust, fromMaybe, isJust, listToMaybe)
 import qualified Data.Set as S
-import System.Console.Haskeline.MonadException (MonadException(controlIO),
-                                                RunIO(RunIO))
 import System.FilePath (replaceExtension)
 import System.IO (Handle, hPutStr, hPutStrLn)
 import System.IO.Error (tryIOError)
 
-instance MonadException m => MonadException (ExceptT Err m) where
-    controlIO f = ExceptT $ controlIO $ \(RunIO run) -> let
-                    run' = RunIO (fmap ExceptT . run . runExceptT)
-                    in fmap runExceptT $ f run'
-
 pshow :: IState -> Err -> String
 pshow ist err = displayDecorated (consoleDecorate ist) .
                 renderPretty 1.0 80 .
diff --git a/src/Idris/REPL.hs b/src/Idris/REPL.hs
index 05587d9672..5e0dc21089 100644
--- a/src/Idris/REPL.hs
+++ b/src/Idris/REPL.hs
@@ -122,23 +122,21 @@ repl orig mods efile
                              (if colour && not isWindows
                                 then colourisePrompt theme str
                                 else str) ++ " "
-        x <- H.catch (H.withInterrupt $ getInputLine prompt)
-                     (ctrlC (return $ Just ""))
+        x <- H.handleInterrupt (ctrlC (return $ Just "")) (H.withInterrupt $ getInputLine prompt)
         case x of
             Nothing -> do lift $ when (not quiet) (iputStrLn "Bye bye")
                           return ()
             Just input -> -- H.catch
-                do ms <- H.catch (H.withInterrupt $ lift $ processInput input orig mods efile)
-                                 (ctrlC (return (Just mods)))
+                do ms <- H.handleInterrupt (ctrlC (return (Just mods))) (H.withInterrupt $ lift $ processInput input orig mods efile)
                    case ms of
                         Just mods -> let efile' = fromMaybe efile (listToMaybe mods)
                                      in repl orig mods efile'
                         Nothing -> return ()
 --                             ctrlC)
 --       ctrlC
-   where ctrlC :: InputT Idris a -> SomeException -> InputT Idris a
-         ctrlC act e = do lift $ iputStrLn (show e)
-                          act -- repl orig mods
+   where ctrlC :: InputT Idris a -> InputT Idris a
+         ctrlC act = do lift $ iputStrLn "Interrupted"
+                        act -- repl orig mods
 
          showMVs c thm [] = ""
          showMVs c thm ms = "Holes: " ++