updates usages of new `installCabalBindist` across files.

app/ghcup/BrickMain.hs

@@ -451,7 +451,7 @@ install' _ (_, ListResult {..}) = do
           liftE $ installGHCBin lVer Nothing $> vi
         Cabal -> do
           let vi = getVersionInfo lVer Cabal dls
-          liftE $ installCabalBin lVer $> vi
+          liftE $ installCabalBin lVer Nothing $> vi
         GHCup -> do
           let vi = snd <$> getLatest dls GHCup
           liftE $ upgradeGHCup Nothing False $> vi

app/ghcup/Main.hs

@@ -1643,27 +1643,20 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
 
 
           let installCabal InstallOptions{..} =
-                (case isolateDir of
-                  Just isoDir ->
-                    runInstTool instPlatform $ do
-                    (v, vi) <- liftE $ fromVersion instVer Cabal
-                    let cabalVersion = (_tvVersion v)
-                    liftE $ installCabalBinIsolated isoDir cabalVersion
-                    pure vi
-                  Nothing ->
-                    case instBindist of
-                       Nothing -> runInstTool instPlatform $ do
-                         (v, vi) <- liftE $ fromVersion instVer Cabal
-                         liftE $ installCabalBin (_tvVersion v)
-                         pure vi
-                       Just uri -> do
-                         s' <- appState
-                         runInstTool' s'{ settings = settings { noVerify = True}} instPlatform $ do
-                           (v, vi) <- liftE $ fromVersion instVer Cabal
-                           liftE $ installCabalBindist
-                               (DownloadInfo uri Nothing "")
-                               (_tvVersion v)
-                           pure vi
+                (case instBindist of
+                   Nothing -> runInstTool instPlatform $ do
+                     (v, vi) <- liftE $ fromVersion instVer Cabal
+                     liftE $ installCabalBin (_tvVersion v) isolateDir
+                     pure vi
+                   Just uri -> do
+                     s' <- appState
+                     runInstTool' s'{ settings = settings { noVerify = True}} instPlatform $ do
+                       (v, vi) <- liftE $ fromVersion instVer Cabal
+                       liftE $ installCabalBindist
+                           (DownloadInfo uri Nothing "")
+                           (_tvVersion v)
+                           isolateDir
+                       pure vi
                   )
                   >>= \case
                         VRight vi -> do

lib/GHCup.hs

@@ -545,6 +545,7 @@ installCabalBin :: ( MonadMask m
                    , MonadFail m
                    )
                 => Version
+                -> Maybe FilePath -- isolated install Path, if user provided any
                 -> Excepts
                      '[ AlreadyInstalled
                       , CopyError
@@ -560,9 +561,9 @@ installCabalBin :: ( MonadMask m
                       ]
                      m
                      ()
-installCabalBin ver = do
+installCabalBin ver isoFilepath = do
   dlinfo <- liftE $ getDownloadInfo Cabal ver
-  installCabalBindist dlinfo ver
+  installCabalBindist dlinfo ver isoFilepath
 
 
 -- | Like 'installHLSBin, except takes the 'DownloadInfo' as