Remove curses dependency

custom.mk-alldeps

@@ -1 +1 @@
-CABALFLAGS += -f LLVM -f FFI -f curses --disable-documentation --disable-profiling --disable-library-profiling
+CABALFLAGS += -f GMP  -f FFI --disable-documentation --disable-profiling --disable-library-profiling

idris.cabal

@@ -839,11 +839,6 @@ Flag GMP
   Default:      False
   manual:       True
 
-Flag curses
-  Description:  Use Curses to get the screen width
-  Default:      False
-  manual:       True
-
 -- This flag determines whether to show Git hashes in version strings
 -- Defaults to True because Hackage is a source release
 Flag release
@@ -1002,6 +997,7 @@ Library
                 , pretty < 1.2
                 , process < 1.3
                 , split < 0.3
+                , terminal-size < 0.4
                 , text >=1.2.1.0 && < 1.3
                 , time >= 1.4 && < 1.6
                 , transformers < 0.5
@@ -1053,9 +1049,6 @@ Library
      build-depends: libffi < 0.2
      extra-libraries: gmp
      cpp-options:   -DIDRIS_GMP
-  if flag(curses)
-     build-depends: hscurses < 1.5
-     cpp-options:   -DCURSES
   if flag(freestanding)
      other-modules: Target_idris
      cpp-options:   -DFREESTANDING

src/Util/ScreenSize.hs

@@ -1,24 +1,14 @@
-{-# LANGUAGE CPP #-}
 module Util.ScreenSize(getScreenWidth) where
 
-#ifndef CURSES
-
-getScreenWidth :: IO Int
-getScreenWidth = return 80
-
-#else
-
-import UI.HSCurses.Curses
+import System.Console.Terminal.Size (size, width)
 import System.IO (hIsTerminalDevice, stdout)
 
 getScreenWidth :: IO Int
 getScreenWidth = do term <- hIsTerminalDevice stdout
+                    sz <- size 
                     if term
-                       then do
-                         initScr
-                         refresh
-                         size <- scrSize
-                         endWin
-                         return (snd size)
-                       else return 80
-#endif
+                        then case sz of
+                                Just w  -> return $ width w
+                                Nothing -> return 80
+                        else return 80
+

stack-shell.nix

@@ -7,7 +7,6 @@ let
   native_libs = [
     libffi
     zlib
-    ncurses
     gmp
     pkgconfig
   ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [

stack.yaml

@@ -9,7 +9,6 @@ flags:
 extra-deps: 
 - annotated-wl-pprint-0.7.0
 - cheapskate-0.1.0.4
-- hscurses-1.4.2.0
 - libffi-0.1
 nix:
    enable: false