Depend only on vty-crossplatform (#1727)

Closes #1623.

Note that we still have to list both `vty-unix` and `vty-windows` in `stack.yaml` but that's OK; it just means they are both made available as extra dependencies, but only whichever is needed will actually be installed.  In the codebase itself, we now get to avoid CPP on imports, and the code is quite a bit simpler.

app/Swarm/App.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE NumericUnderscores #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TypeApplications #-}
@@ -24,13 +23,7 @@ import Data.IORef (newIORef, writeIORef)
 import Data.Text qualified as T
 import Data.Text.IO qualified as T
 import Graphics.Vty qualified as V
-#if defined(mingw32_HOST_OS) || defined(__MINGW32__)
-import Graphics.Vty.Platform.Windows.Settings qualified as VS
-import Graphics.Vty.Platform.Windows qualified as VS
-#else
-import Graphics.Vty.Platform.Unix.Settings qualified as VS
-import Graphics.Vty.Platform.Unix qualified as VS
-#endif
+import Graphics.Vty.CrossPlatform qualified as V
 import Swarm.Game.Failure (SystemFailure)
 import Swarm.Language.Pretty (prettyText)
 import Swarm.Log (LogSource (SystemLog), Severity (..))
@@ -116,12 +109,7 @@ appMain opts = do
             handleEvent e
 
       -- Setup virtual terminal
-      let buildVty =
-            case colorMode opts of
-              Nothing -> VS.mkVty V.defaultConfig
-              Just cMode -> do
-                platformSettings <- VS.defaultSettings
-                VS.mkVtyWithSettings V.defaultConfig $ platformSettings {VS.settingColorMode = cMode}
+      let buildVty = V.mkVty V.defaultConfig {V.configPreferredColorMode = colorMode opts}
       vty <- buildVty
 
       V.setMode (V.outputIface vty) V.Mouse True

stack.yaml

@@ -3,9 +3,10 @@ extra-deps:
 - hsnoise-0.0.3@sha256:260b39175b8a3e3b1719ad3987b7d72a3fd7a0fa99be8639b91cf4dc3f1c8796,1476
 - simple-enumeration-0.2.1@sha256:8625b269c1650d3dd0e3887351c153049f4369853e0d525219e07480ea004b9f,1178
 - boolexpr-0.2@sha256:07f38a0206ad63c2c893e3c6271a2e45ea25ab4ef3a9e973edc746876f0ab9e8,853
-- vty-6.0@sha256:3c4ee4ffd6e38720e227c45e85eb91ff611125dbff178e9f2fadc993160e1464,3661
-- vty-crossplatform-0.2.0.0@sha256:6dc6b72ba2fe63f0af582a501ab133a69f49fb75fef3ad7a870412472be077ec,3161
-- vty-unix-0.1.0.0@sha256:8d1dd971d49b4d3575ec76994a8dd5d330d7b81a30ece40344ee170d73a28ac3,2932
+- vty-6.1@sha256:524d124223c02373260ebc409ddd622fbe97cacd1ea0ee98476b5992bddbc4f3,3661
+- vty-crossplatform-0.4.0.0@sha256:50593f91ad16777d921138475a8d2784d538fd206addd30664c620278d6c8544,3172
+- vty-unix-0.2.0.0@sha256:2af3d0bdae3c4b7b7e567ee374efe32c7439fabdf9096465ce011a6c6736e9ae,2932
+- vty-windows-0.2.0.1
 - brick-2.1.1
 - brick-list-skip-0.1.1.8
 - astar-0.3.0.0

swarm.cabal

@@ -132,7 +132,7 @@ library swarm-lang
                       lsp                           >= 1.6 && < 1.7,
                       hashable,
                       megaparsec,
-                      mtl,                      
+                      mtl,
                       parser-combinators,
                       prettyprinter,
                       split,
@@ -286,7 +286,7 @@ library swarm-engine
                       transformers                  >= 0.5.6.2 && < 0.6.2.0,
                       unordered-containers          >= 0.2.14 && < 0.3,
                       vector                        >= 0.12 && < 0.14,
-                      vty                           >= 6.0 && < 6.1,
+                      vty                           >= 6.1 && < 6.2,
                       witch                         >= 1.1.1.0 && < 1.3,
                       witherable                    >= 0.4 && < 0.5,
                       yaml                          >= 0.11 && < 0.11.12.0,
@@ -576,7 +576,7 @@ library
                       time                          >= 1.9 && < 1.14,
                       transformers                  >= 0.5.6.2 && < 0.6.2.0,
                       vector                        >= 0.12 && < 0.14,
-                      vty                           >= 6.0 && < 6.1,
+                      vty                           >= 6.1 && < 6.2,
                       warp                          >= 3.2 && < 3.4,
                       witch                         >= 1.1.1.0 && < 1.3,
                       word-wrap                     >= 0.5 && < 0.6,
@@ -608,14 +608,11 @@ executable swarm
                       prettyprinter,
                       text,
                       vty,
+                      vty-crossplatform >= 0.4 && < 0.5,
                       swarm,
                       swarm:swarm-lang,
                       swarm:swarm-web,
                       swarm:swarm-util,
-    if os(windows)
-      build-depends:  vty-windows                   >= 0.1.0.3 && < 0.2,
-    else
-      build-depends:  vty-unix                      >= 0.1.0.0 && < 0.2,
     hs-source-dirs:   app
     default-language: Haskell2010
     ghc-options:      -threaded