Use ghc-debug

2022-06-11 15:30:52 +02:00
28 changed files with 309 additions and 922 deletions
--- a/.gitlab/script/ghcup_version.sh
+++ b/.gitlab/script/ghcup_version.sh
@@ -97,23 +97,17 @@ rm -rf "${GHCUP_DIR}"
 eghcup --numeric-version

 eghcup install ghc ${GHC_VERSION}
-eghcup unset ghc ${GHC_VERSION}
 ls -lah "$(eghcup whereis -d ghc ${GHC_VERSION})"
 [ "`$(eghcup whereis ghc ${GHC_VERSION}) --numeric-version`" = "${GHC_VERSION}" ]
 [ "`eghcup run --ghc ${GHC_VERSION} -- ghc --numeric-version`" = "${GHC_VERSION}" ]
-[ "`ghcup run --ghc ${GHC_VERSION} -- ghc -e 'Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)'`" = "`$(ghcup whereis ghc ${GHC_VERSION}) -e 'Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)'`" ]
 eghcup set ghc ${GHC_VERSION}
 eghcup install cabal ${CABAL_VERSION}
 [ "`$(eghcup whereis cabal ${CABAL_VERSION}) --numeric-version`" = "${CABAL_VERSION}" ]
 eghcup unset cabal
 "$GHCUP_BIN"/cabal --version && exit 1 || echo yes
-
-# make sure no cabal is set when running 'ghcup run' to check that PATH propagages properly
-# https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/375
-[ "`eghcup run --cabal ${CABAL_VERSION} -- cabal --numeric-version`" = "${CABAL_VERSION}" ]
 eghcup set cabal ${CABAL_VERSION}
-
 [ "`$(eghcup whereis cabal ${CABAL_VERSION}) --numeric-version`" = "${CABAL_VERSION}" ]
+[ "`eghcup run --cabal ${CABAL_VERSION} -- cabal --numeric-version`" = "${CABAL_VERSION}" ]

 if [ "${OS}" != "FREEBSD" ] ; then
 	if [ "${ARCH}" = "64" ] ; then
--- a/app/ghcup/BrickMain.hs
+++ b/app/ghcup/BrickMain.hs
@@ -17,7 +17,6 @@ import           GHCup.Prelude ( decUTF8Safe )
 import           GHCup.Prelude.File
 import           GHCup.Prelude.Logger
 import           GHCup.Prelude.Process
-import           GHCup.Prompts

 import           Brick
 import           Brick.Widgets.Border
@@ -53,8 +52,6 @@ import           Text.PrettyPrint.HughesPJClass ( prettyShow )
 import           URI.ByteString

 import qualified Data.Text                     as T
-import qualified Data.Text.Lazy.Builder        as B
-import qualified Data.Text.Lazy                as L
 import qualified Graphics.Vty                  as Vty
 import qualified Data.Vector                   as V
 import System.Environment (getExecutablePath)
@@ -101,7 +98,7 @@ keyHandlers KeyBindings {..} =
  [ (bQuit, const "Quit"     , halt)
  , (bInstall, const "Install"  , withIOAction install')
  , (bUninstall, const "Uninstall", withIOAction del')
-  , (bSet, const "Set"      , withIOAction set')
+  , (bSet, const "Set"      , withIOAction ((liftIO .) . set'))
  , (bChangelog, const "ChangeLog", withIOAction changelog')
  , ( bShowAllVersions
    , \BrickSettings {..} ->
@@ -489,12 +486,9 @@ install' _ (_, ListResult {..}) = do
            <> "Also check the logs in ~/.ghcup/logs"


-set' :: (MonadReader AppState m, MonadIO m, MonadThrow m, MonadFail m, MonadMask m, MonadUnliftIO m)
-     => BrickState
-     -> (Int, ListResult)
-     -> m (Either String ())
-set' bs input@(_, ListResult {..}) = do
-  settings <- liftIO $ readIORef settings'
+set' :: BrickState -> (Int, ListResult) -> IO (Either String ())
+set' _ (_, ListResult {..}) = do
+  settings <- readIORef settings'

  let run =
        flip runReaderT settings
@@ -510,28 +504,7 @@ set' bs input@(_, ListResult {..}) = do
    )
    >>= \case
          VRight _ -> pure $ Right ()
-          VLeft  e -> case e of
-            (V (NotInstalled tool _)) -> do
-              promptAnswer <- getUserPromptResponse userPrompt
-              case promptAnswer of
-                PromptYes -> do
-                  res <- install' bs input
-                  case res of
-                    (Left err) -> pure $ Left err
-                    (Right _) -> do
-                      logInfo "Setting now..."
-                      set' bs input
-
-                PromptNo -> pure $ Left (prettyShow e)
-              where
-                userPrompt = L.toStrict . B.toLazyText . B.fromString $
-                  "This Version of "
-                  <> show tool
-                  <> " you are trying to set is not installed.\n"
-                  <> "Would you like to install it first? [Y/N]: "
-
-            _ -> pure $ Left (prettyShow e)
-
+          VLeft  e -> pure $ Left (prettyShow e)


 del' :: (MonadReader AppState m, MonadIO m, MonadFail m, MonadMask m, MonadUnliftIO m)
--- a/app/ghcup/GHCup/OptParse/ChangeLog.hs
+++ b/app/ghcup/GHCup/OptParse/ChangeLog.hs
@@ -58,7 +58,7 @@ data ChangeLogOptions = ChangeLogOptions
    --[ Parsers ]--
    ---------------

-
+          
 changelogP :: Parser ChangeLogOptions
 changelogP =
  (\x y -> ChangeLogOptions x y)
@@ -71,16 +71,15 @@ changelogP =
                "cabal" -> Right Cabal
                "ghcup" -> Right GHCup
                "stack" -> Right Stack
-                "hls"   -> Right HLS
                e       -> Left e
              )
            )
-            (short 't' <> long "tool" <> metavar "<ghc|cabal|hls|ghcup>" <> help
+            (short 't' <> long "tool" <> metavar "<ghc|cabal|ghcup>" <> help
              "Open changelog for given tool (default: ghc)"
              <> completer toolCompleter
            )
          )
-    <*> optional (toolVersionTagArgument Nothing Nothing)
+    <*> optional (toolVersionArgument Nothing Nothing)



@@ -117,8 +116,7 @@ changelog ChangeLogOptions{..} runAppState runLogger = do
      ver' = maybe
        (Right Latest)
        (\case
-          GHCVersion tv  -> Left (_tvVersion tv)
-          ToolVersion tv -> Left tv
+          ToolVersion tv -> Left (_tvVersion tv) -- FIXME: ugly sharing of ToolVersion
          ToolTag     t  -> Right t
        )
        clToolVer
--- a/app/ghcup/GHCup/OptParse/Common.hs
+++ b/app/ghcup/GHCup/OptParse/Common.hs
@@ -70,24 +70,20 @@ import Control.Exception (evaluate)
    --[ Types ]--
    -------------

-data ToolVersion = GHCVersion GHCTargetVersion
-                 | ToolVersion Version
+data ToolVersion = ToolVersion GHCTargetVersion -- target is ignored for cabal
                 | ToolTag Tag

 -- a superset of ToolVersion
-data SetToolVersion = SetGHCVersion GHCTargetVersion
-                    | SetToolVersion Version
+data SetToolVersion = SetToolVersion GHCTargetVersion
                    | SetToolTag Tag
                    | SetRecommended
                    | SetNext

 prettyToolVer :: ToolVersion -> String
-prettyToolVer (GHCVersion v') = T.unpack $ tVerToText v'
-prettyToolVer (ToolVersion v') = T.unpack $ prettyVer v'
+prettyToolVer (ToolVersion v') = T.unpack $ tVerToText v'
 prettyToolVer (ToolTag t) = show t

 toSetToolVer :: Maybe ToolVersion -> SetToolVersion
-toSetToolVer (Just (GHCVersion v')) = SetGHCVersion v'
 toSetToolVer (Just (ToolVersion v')) = SetToolVersion v'
 toSetToolVer (Just (ToolTag t')) = SetToolTag t'
 toSetToolVer Nothing = SetRecommended
@@ -100,9 +96,10 @@ toSetToolVer Nothing = SetRecommended
    --------------


-toolVersionTagArgument :: Maybe ListCriteria -> Maybe Tool -> Parser ToolVersion
-toolVersionTagArgument criteria tool =
-  argument (eitherReader (parser tool))
+-- | same as toolVersionParser, except as an argument.
+toolVersionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser ToolVersion
+toolVersionArgument criteria tool =
+  argument (eitherReader toolVersionEither)
    (metavar (mv tool)
    <> completer (tagCompleter (fromMaybe GHC tool) [])
    <> foldMap (completer . versionCompleter criteria) tool)
@@ -111,19 +108,20 @@ toolVersionTagArgument criteria tool =
  mv (Just HLS) = "HLS_VERSION|TAG"
  mv _          = "VERSION|TAG"

-  parser (Just GHC) = ghcVersionTagEither
-  parser Nothing    = ghcVersionTagEither
-  parser _          = toolVersionTagEither

+versionParser :: Parser GHCTargetVersion
+versionParser = option
+  (eitherReader tVersionEither)
+  (short 'v' <> long "version" <> metavar "VERSION" <> help "The target version"
+  )

 versionParser' :: Maybe ListCriteria -> Maybe Tool -> Parser Version
 versionParser' criteria tool = argument
  (eitherReader (first show . version . T.pack))
  (metavar "VERSION"  <> foldMap (completer . versionCompleter criteria) tool)

-ghcVersionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser GHCTargetVersion
-ghcVersionArgument criteria tool = argument (eitherReader ghcVersionEither)
-                                            (metavar "VERSION" <> foldMap (completer . versionCompleter criteria) tool)
+versionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser GHCTargetVersion
+versionArgument criteria tool = argument (eitherReader tVersionEither) (metavar "VERSION" <> foldMap (completer . versionCompleter criteria) tool)


 -- https://github.com/pcapriotti/optparse-applicative/issues/148
@@ -232,15 +230,9 @@ isolateParser f = case isValid f && isAbsolute f of
              True -> Right $ normalise f
              False -> Left "Please enter a valid filepath for isolate dir."

-- this accepts cross prefix
-ghcVersionTagEither :: String -> Either String ToolVersion
-ghcVersionTagEither s' =
-  second ToolTag (tagEither s') <|> second GHCVersion (ghcVersionEither s')
-
-- this ignores cross prefix
-toolVersionTagEither :: String -> Either String ToolVersion
-toolVersionTagEither s' =
-  second ToolTag (tagEither s') <|> second ToolVersion (toolVersionEither s')
+toolVersionEither :: String -> Either String ToolVersion
+toolVersionEither s' =
+  second ToolTag (tagEither s') <|> second ToolVersion (tVersionEither s')

 tagEither :: String -> Either String Tag
 tagEither s' = case fmap toLower s' of
@@ -252,14 +244,10 @@ tagEither s' = case fmap toLower s' of
  other         -> Left $ "Unknown tag " <> other


-ghcVersionEither :: String -> Either String GHCTargetVersion
-ghcVersionEither =
+tVersionEither :: String -> Either String GHCTargetVersion
+tVersionEither =
  first (const "Not a valid version") . MP.parse ghcTargetVerP "" . T.pack

-toolVersionEither :: String -> Either String Version
-toolVersionEither =
-  first (const "Not a valid version") . MP.parse version' "" . T.pack
-

 toolParser :: String -> Either String Tool
 toolParser s' | t == T.pack "ghc"   = Right GHC
@@ -452,11 +440,9 @@ tagCompleter tool add = listIOCompleter $ do
      pure $ nub $ (add ++) $ fmap tagToString allTags
    VLeft _ -> pure  (nub $ ["recommended", "latest"] ++ add)

-versionCompleter :: Maybe ListCriteria -> Tool -> Completer
-versionCompleter criteria tool = versionCompleter' criteria tool (const True)

-versionCompleter' :: Maybe ListCriteria -> Tool -> (Version -> Bool) -> Completer
-versionCompleter' criteria tool filter' = listIOCompleter $ do
+versionCompleter :: Maybe ListCriteria -> Tool -> Completer
+versionCompleter criteria tool = listIOCompleter $ do
  dirs' <- liftIO getAllDirs
  let loggerConfig = LoggerConfig
        { lcPrintDebug   = False
@@ -485,7 +471,7 @@ versionCompleter' criteria tool filter' = listIOCompleter $ do
          runEnv = flip runReaderT appState

      installedVersions <- runEnv $ listVersions (Just tool) criteria
-      return $ fmap (T.unpack . prettyVer) . filter filter' . fmap lVer $ installedVersions
+      return $ T.unpack . prettyVer . lVer <$> installedVersions


 toolDlCompleter :: Tool -> Completer
@@ -677,7 +663,7 @@ fromVersion' SetRecommended tool = do
  GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
  bimap mkTVer Just <$> getRecommended dls tool
    ?? TagNotFound Recommended tool
-fromVersion' (SetGHCVersion v) tool = do
+fromVersion' (SetToolVersion v) tool = do
  GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
  let vi = getVersionInfo (_tvVersion v) tool dls
  case pvp $ prettyVer (_tvVersion v) of -- need to be strict here
@@ -689,18 +675,6 @@ fromVersion' (SetGHCVersion v) tool = do
          when (v' /= _tvVersion v) $ lift $ logWarn ("Assuming you meant version " <> prettyVer v')
          pure (GHCTargetVersion (_tvTarget v) v', Just vi')
        Nothing -> pure (v, vi)
-fromVersion' (SetToolVersion v) tool = do
-  GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
-  let vi = getVersionInfo v tool dls
-  case pvp $ prettyVer v of -- need to be strict here
-    Left _ -> pure (mkTVer v, vi)
-    Right pvpIn ->
-      lift (getLatestToolFor tool pvpIn dls) >>= \case
-        Just (pvp_, vi') -> do
-          v' <- lift $ pvpToVersion pvp_ ""
-          when (v' /= v) $ lift $ logWarn ("Assuming you meant version " <> prettyVer v')
-          pure (GHCTargetVersion mempty v', Just vi')
-        Nothing -> pure (mkTVer v, vi)
 fromVersion' (SetToolTag Latest) tool = do
  GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
  bimap mkTVer Just <$> getLatest dls tool ?? TagNotFound Latest tool
--- a/app/ghcup/GHCup/OptParse/Compile.hs
+++ b/app/ghcup/GHCup/OptParse/Compile.hs
@@ -12,8 +12,6 @@ module GHCup.OptParse.Compile where


 import           GHCup
-import qualified GHCup.GHC as GHC
-import qualified GHCup.HLS as HLS
 import           GHCup.Errors
 import           GHCup.Types
 import           GHCup.Types.Optics
@@ -32,8 +30,7 @@ import           Control.Monad.Trans.Resource
 import           Data.Bifunctor
 import           Data.Functor
 import           Data.Maybe
-import           Data.Versions                  ( Version, prettyVer, version, pvp )
-import qualified Data.Versions as V
+import           Data.Versions                  ( Version, prettyVer, version )
 import           Data.Text                      ( Text )
 import           Haskus.Utils.Variant.Excepts
 import           Options.Applicative     hiding ( style )
@@ -44,7 +41,7 @@ import           Text.PrettyPrint.HughesPJClass ( prettyShow )

 import           URI.ByteString          hiding ( uriParser )
 import qualified Data.Text                     as T
-import Control.Exception.Safe (MonadMask, displayException)
+import Control.Exception.Safe (MonadMask)
 import System.FilePath (isPathSeparator)
 import Text.Read (readEither)

@@ -67,7 +64,7 @@ data CompileCommand = CompileGHC GHCCompileOptions


 data GHCCompileOptions = GHCCompileOptions
-  { targetGhc    :: GHC.GHCVer Version
+  { targetGhc    :: Either Version GitBranch
  , bootstrapGhc :: Either Version FilePath
  , jobs         :: Maybe Int
  , buildConfig  :: Maybe FilePath
@@ -81,13 +78,11 @@ data GHCCompileOptions = GHCCompileOptions
  , isolateDir   :: Maybe FilePath
  }

-
 data HLSCompileOptions = HLSCompileOptions
-  { targetHLS    :: HLS.HLSVer
+  { targetHLS    :: Either Version GitBranch
  , jobs         :: Maybe Int
  , setCompile   :: Bool
-  , updateCabal  :: Bool
-  , ovewrwiteVer :: Either Bool Version
+  , ovewrwiteVer :: Maybe Version
  , isolateDir   :: Maybe FilePath
  , cabalProject :: Maybe (Either FilePath URI)
  , cabalProjectLocal :: Maybe URI
@@ -150,22 +145,20 @@ Examples:

  compileHLSFooter = [s|Discussion:
  Compiles and installs the specified HLS version.
-  The --ghc arguments are necessary to specify which GHC version to build for/against.
+  The last argument is a list of GHC versions to compile for.
  These need to be available in PATH prior to compilation.

 Examples:
-  # compile 1.7.0.0 from hackage for 8.10.7, running 'cabal update' before the build
-  ghcup compile hls --version 1.7.0.0 --ghc 8.10.7 --cabal-update
-  # compile from master for ghc 9.2.3 using 'git describe' to name the binary and ignore the pinned index state
-  ghcup compile hls -g master --git-describe-version --ghc 9.2.3 -- --index-state=@(date '+%s')
-  # compile a specific commit for ghc 9.2.3 and set a specifc version for the binary name
-  ghcup compile hls -g a32db0b -o 1.7.0.0-p1 --ghc 9.2.3|]
+  # compile 1.4.0 for ghc 8.10.5 and 8.10.7
+  ghcup compile hls -v 1.4.0 -j 12 --ghc 8.10.5 --ghc 8.10.7
+  # compile from master for ghc 8.10.7, linking everything dynamically
+  ghcup compile hls -g master -j 12 --ghc 8.10.7 -- --ghc-options='-dynamic'|]


 ghcCompileOpts :: Parser GHCCompileOptions
 ghcCompileOpts =
  GHCCompileOptions
-    <$> ((GHC.SourceDist <$> option
+    <$> ((Left <$> option
          (eitherReader
            (first (const "Not a valid version") . version . T.pack)
          )
@@ -174,7 +167,7 @@ ghcCompileOpts =
            <> (completer $ versionCompleter Nothing GHC)
          )
          ) <|>
-          (GHC.GitDist <$> (GitBranch <$> option
+          (Right <$> (GitBranch <$> option
          str
          (short 'g' <> long "git-ref" <> metavar "GIT_REFERENCE" <> help
            "The git commit/branch/ref to build from"
@@ -183,18 +176,7 @@ ghcCompileOpts =
            short 'r' <> long "repository" <> metavar "GIT_REPOSITORY" <> help "The git repository to build from (defaults to GHC upstream)"
            <> completer (gitFileUri ["https://gitlab.haskell.org/ghc/ghc.git"])
            ))
-          ))
-          <|>
-          (
-           GHC.RemoteDist <$> (option
-            (eitherReader uriParser)
-            (long "remote-source-dist" <> metavar "URI" <> help
-              "URI (https/http/file) to a GHC source distribution"
-              <> completer fileUri
-            )
-          )
-          )
-          )
+          )))
    <*> option
          (eitherReader
            (\x ->
@@ -286,46 +268,24 @@ ghcCompileOpts =
 hlsCompileOpts :: Parser HLSCompileOptions
 hlsCompileOpts =
  HLSCompileOptions
-    <$> ((HLS.HackageDist <$> option
+    <$> ((Left <$> option
          (eitherReader
-            ((>>= first displayException . V.version . V.prettyPVP) . first (const "Not a valid PVP version") . pvp . T.pack)
+            (first (const "Not a valid version") . version . T.pack)
          )
          (short 'v' <> long "version" <> metavar "VERSION" <> help
-            "The version to compile (pulled from hackage)"
-            <> (completer $ versionCompleter' Nothing HLS (either (const False) (const True) . V.pvp . V.prettyVer))
+            "The tool version to compile"
+            <> (completer $ versionCompleter Nothing HLS)
          )
-          )
-          <|>
-          (HLS.GitDist <$> (GitBranch <$> option
+          ) <|>
+          (Right <$> (GitBranch <$> option
          str
          (short 'g' <> long "git-ref" <> metavar "GIT_REFERENCE" <> help
-            "The git commit/branch/ref to build from (accepts anything 'git checkout' accepts)"
+            "The git commit/branch/ref to build from"
          ) <*>
          optional (option str (short 'r' <> long "repository" <> metavar "GIT_REPOSITORY" <> help "The git repository to build from (defaults to HLS upstream)"
            <> completer (gitFileUri ["https://github.com/haskell/haskell-language-server.git"])
          ))
-          ))
-          <|>
-          (HLS.SourceDist <$> (option
-            (eitherReader
-              (first (const "Not a valid version") . version . T.pack)
-            )
-          (long "source-dist" <> metavar "VERSION" <> help
-            "The version to compile (pulled from packaged git sources)"
-            <> (completer $ versionCompleter Nothing HLS)
-          )
-          ))
-          <|>
-          (
-           HLS.RemoteDist <$> (option
-            (eitherReader uriParser)
-            (long "remote-source-dist" <> metavar "URI" <> help
-              "URI (https/http/file) to a HLS source distribution"
-              <> completer fileUri
-            )
-          )
-          )
-          )
+          )))
    <*> optional
          (option
            (eitherReader (readEither @Int))
@@ -335,10 +295,8 @@ hlsCompileOpts =
            )
          )
    <*> fmap (fromMaybe True) (invertableSwitch "set" Nothing True (help "Don't set as active version after install"))
-    <*> switch (long "cabal-update" <> help "Run 'cabal update' before the build")
-    <*>
-         (
-          (Right <$> option
+    <*> optional
+          (option
            (eitherReader
              (first (const "Not a valid version") . version . T.pack)
            )
@@ -347,14 +305,6 @@ hlsCompileOpts =
            <> (completer $ versionCompleter Nothing HLS)
            )
          )
-          <|>
-          (Left <$> (switch
-                      (long "git-describe-version"
-                         <> help "Use the output of 'git describe' (if building from git) as the VERSION component of the installed binary."
-                      )
-                    )
-          )
-          )
    <*> optional
          (option
            (eitherReader isolateParser)
@@ -401,7 +351,7 @@ hlsCompileOpts =
          )
        )
    <*> some (
-          option (eitherReader ghcVersionTagEither)
+          option (eitherReader toolVersionEither)
            (  long "ghc" <> metavar "GHC_VERSION|TAG" <> help "For which GHC version to compile for (can be specified multiple times)"
            <> completer (tagCompleter GHC [])
            <> completer (versionCompleter Nothing GHC))
@@ -507,7 +457,7 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
    (CompileHLS HLSCompileOptions { .. }) -> do
      runCompileHLS runAppState (do
        case targetHLS of
-          HLS.SourceDist targetVer -> do
+          Left targetVer -> do
            GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
            let vi = getVersionInfo targetVer HLS dls
            forM_ (_viPreCompile =<< vi) $ \msg -> do
@@ -515,7 +465,7 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
              lift $ logInfo
                "...waiting for 5 seconds, you can still abort..."
              liftIO $ threadDelay 5000000 -- for compilation, give the user a sec to intervene
-          _ -> pure ()
+          Right _ -> pure ()
        ghcs <- liftE $ forM targetGHCs (\ghc -> fmap (_tvVersion . fst) . fromVersion (Just ghc) $ GHC)
        targetVer <- liftE $ compileHLS
                    targetHLS
@@ -525,7 +475,6 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
                    (maybe GHCupInternal IsolateDir isolateDir)
                    cabalProject
                    cabalProjectLocal
-                    updateCabal
                    patches
                    cabalArgs
        GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
@@ -559,7 +508,7 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
    (CompileGHC GHCCompileOptions {..}) ->
      runCompileGHC runAppState (do
        case targetGhc of
-          GHC.SourceDist targetVer -> do
+          Left targetVer -> do
            GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
            let vi = getVersionInfo targetVer GHC dls
            forM_ (_viPreCompile =<< vi) $ \msg -> do
@@ -567,12 +516,9 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
              lift $ logInfo
                "...waiting for 5 seconds, you can still abort..."
              liftIO $ threadDelay 5000000 -- for compilation, give the user a sec to intervene
-          _ -> pure ()
+          Right _ -> pure ()
        targetVer <- liftE $ compileGHC
-                    ((\case
-                        GHC.SourceDist v -> GHC.SourceDist $ GHCTargetVersion crossTarget v
-                        GHC.GitDist g -> GHC.GitDist g
-                        GHC.RemoteDist r -> GHC.RemoteDist r) targetGhc)
+                    (first (GHCTargetVersion crossTarget) targetGhc)
                    ovewrwiteVer
                    bootstrapGhc
                    jobs
--- a/app/ghcup/GHCup/OptParse/Install.hs
+++ b/app/ghcup/GHCup/OptParse/Install.hs
@@ -196,7 +196,7 @@ installOpts tool =
                      <> completer (toolDlCompleter (fromMaybe GHC tool))
                    )
                  )
-            <*> (Just <$> toolVersionTagArgument Nothing tool)
+            <*> (Just <$> toolVersionArgument Nothing tool)
            )
        <|> pure (Nothing, Nothing)
        )
--- a/app/ghcup/GHCup/OptParse/Prefetch.hs
+++ b/app/ghcup/GHCup/OptParse/Prefetch.hs
@@ -74,44 +74,44 @@ data PrefetchGHCOptions = PrefetchGHCOptions {
    --[ Parsers ]--
    ---------------

-
+          
 prefetchP :: Parser PrefetchCommand
 prefetchP = subparser
  (  command
      "ghc"
-      (info
+      (info 
        (PrefetchGHC
          <$> (PrefetchGHCOptions
                <$> ( switch (short 's' <> long "source" <> help "Download source tarball instead of bindist") <**> helper )
                <*> optional (option str (short 'd' <> long "directory" <> help "directory to download into (default: ~/.ghcup/cache/)" <> completer (bashCompleter "directory"))))
-          <*>  optional (toolVersionTagArgument Nothing (Just GHC)) )
+          <*>  optional (toolVersionArgument Nothing (Just GHC)) )
        ( progDesc "Download GHC assets for installation")
      )
      <>
     command
      "cabal"
-      (info
+      (info 
        (PrefetchCabal
          <$> fmap PrefetchOptions (optional (option str (short 'd' <> long "directory" <> help "directory to download into (default: ~/.ghcup/cache/)" <> completer (bashCompleter "directory"))))
-          <*> ( optional (toolVersionTagArgument Nothing (Just Cabal)) <**> helper ))
+          <*> ( optional (toolVersionArgument Nothing (Just Cabal)) <**> helper ))
        ( progDesc "Download cabal assets for installation")
      )
      <>
     command
      "hls"
-      (info
+      (info 
        (PrefetchHLS
          <$> fmap PrefetchOptions (optional (option str (short 'd' <> long "directory" <> help "directory to download into (default: ~/.ghcup/cache/)" <> completer (bashCompleter "directory"))))
-          <*> ( optional (toolVersionTagArgument Nothing (Just HLS)) <**> helper ))
+          <*> ( optional (toolVersionArgument Nothing (Just HLS)) <**> helper ))
        ( progDesc "Download HLS assets for installation")
      )
      <>
     command
      "stack"
-      (info
+      (info 
        (PrefetchStack
          <$> fmap PrefetchOptions (optional (option str (short 'd' <> long "directory" <> help "directory to download into (default: ~/.ghcup/cache/)" <> completer (bashCompleter "directory"))))
-          <*> ( optional (toolVersionTagArgument Nothing (Just Stack)) <**> helper ))
+          <*> ( optional (toolVersionArgument Nothing (Just Stack)) <**> helper ))
        ( progDesc "Download stack assets for installation")
      )
      <>
--- a/app/ghcup/GHCup/OptParse/Rm.hs
+++ b/app/ghcup/GHCup/OptParse/Rm.hs
@@ -71,7 +71,7 @@ data RmOptions = RmOptions
    --[ Parsers ]--
    ---------------

-
+          
 rmParser :: Parser (Either RmCommand RmOptions)
 rmParser =
  (Left <$> subparser
@@ -103,7 +103,7 @@ rmParser =


 rmOpts :: Maybe Tool -> Parser RmOptions
-rmOpts tool = RmOptions <$> ghcVersionArgument (Just ListInstalled) tool
+rmOpts tool = RmOptions <$> versionArgument (Just ListInstalled) tool



--- a/app/ghcup/GHCup/OptParse/Run.hs
+++ b/app/ghcup/GHCup/OptParse/Run.hs
@@ -5,7 +5,6 @@
 {-# LANGUAGE RankNTypes        #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE TypeFamilies      #-}
-{-# LANGUAGE ViewPatterns      #-}
 module GHCup.OptParse.Run where


@@ -19,7 +18,6 @@ import           GHCup.Prelude
 import           GHCup.Prelude.File
 #ifdef IS_WINDOWS
 import           GHCup.Prelude.Process
-import           GHCup.Prelude.Process.Windows ( execNoMinGW )
 #endif
 import           GHCup.Prelude.Logger
 import           GHCup.Prelude.String.QQ
@@ -47,7 +45,6 @@ import qualified Data.Text                     as T
 #ifndef IS_WINDOWS
 import qualified System.Posix.Process          as SPP
 #endif
-import Data.Versions ( prettyVer, Version )



@@ -61,7 +58,6 @@ import Data.Versions ( prettyVer, Version )
 data RunOptions = RunOptions
  { runAppendPATH :: Bool
  , runInstTool'  :: Bool
-  , runMinGWPath  :: Bool
  , runGHCVer     :: Maybe ToolVersion
  , runCabalVer   :: Maybe ToolVersion
  , runHLSVer     :: Maybe ToolVersion
@@ -86,11 +82,9 @@ runOpts =
          (short 'a' <> long "append" <> help "Append bin/ dir to PATH instead of prepending (this means that e.g. a system installation may take precedence)")
    <*> switch
          (short 'i' <> long "install" <> help "Install the tool, if missing")
-    <*> switch
-          (short 'm' <> long "mingw-path" <> help "On windows, add mingw64 PATHs to environment (does nothing on unix)")
    <*> optional
          (option
-            (eitherReader ghcVersionTagEither)
+            (eitherReader toolVersionEither)
            (metavar "GHC_VERSION" <> long "ghc" <> help "The ghc version"
            <> completer (tagCompleter GHC [])
            <> (completer $ versionCompleter Nothing GHC)
@@ -98,7 +92,7 @@ runOpts =
          )
    <*> optional
          (option
-            (eitherReader toolVersionTagEither)
+            (eitherReader toolVersionEither)
            (metavar "CABAL_VERSION" <> long "cabal" <> help "The cabal version"
            <> completer (tagCompleter Cabal [])
            <> (completer $ versionCompleter Nothing Cabal)
@@ -106,7 +100,7 @@ runOpts =
          )
    <*> optional
          (option
-            (eitherReader toolVersionTagEither)
+            (eitherReader toolVersionEither)
            (metavar "HLS_VERSION" <> long "hls" <> help "The HLS version"
            <> completer (tagCompleter HLS [])
            <> (completer $ versionCompleter Nothing HLS)
@@ -114,7 +108,7 @@ runOpts =
          )
    <*> optional
          (option
-            (eitherReader toolVersionTagEither)
+            (eitherReader toolVersionEither)
            (metavar "STACK_VERSION" <> long "stack" <> help "The stack version"
            <> completer (tagCompleter Stack [])
            <> (completer $ versionCompleter Nothing Stack)
@@ -219,7 +213,7 @@ runRUN appState action' = do



-run :: forall m .
+run :: forall m. 
       ( MonadFail m
       , MonadMask m
       , MonadCatch m
@@ -235,16 +229,12 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
   r <- if not runQuick
        then runRUN runAppState $ do
         toolchain <- liftE resolveToolchainFull
-
-         -- oh dear
-         r <- lift ask
-         tmp <- lift . lift . lift . flip runReaderT (fromAppState r) $ createTmpDir toolchain
-
+         tmp <- liftIO $ createTmpDir toolchain
         liftE $ installToolChainFull toolchain tmp
         pure tmp
        else runLeanRUN leanAppstate $ do
         toolchain <- resolveToolchain
-         tmp <- lift $ createTmpDir toolchain
+         tmp <- liftIO $ createTmpDir toolchain
         liftE $ installToolChain toolchain tmp
         pure tmp
   case r of
@@ -259,9 +249,7 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
               void $ liftIO $ SPP.executeFile cmd True args (Just newEnv)
               pure ExitSuccess
 #else
-               r' <- if runMinGWPath
-                     then runLeanRUN leanAppstate $ liftE $ lEM @_ @'[ProcessError] $ exec cmd args Nothing (Just newEnv)
-                     else runLeanRUN leanAppstate $ liftE $ lEM @_ @'[ProcessError] $ execNoMinGW cmd args Nothing (Just newEnv)
+               r' <- runLeanRUN leanAppstate $ liftE $ lEM @_ @'[ProcessError] $ exec cmd args Nothing (Just newEnv)
               case r' of
                 VRight _ -> pure ExitSuccess
                 VLeft e -> do
@@ -274,6 +262,17 @@ run RunOptions{..} runAppState leanAppstate runLogger = do

  where

+   createTmpDir :: Toolchain -> IO FilePath
+   createTmpDir toolchain =
+     case runBinDir of
+           Just bindir -> do
+             createDirRecursive' bindir
+             canonicalizePath bindir
+           Nothing -> do
+             d <- predictableTmpDir toolchain
+             createDirRecursive' d
+             canonicalizePath d
+
   -- TODO: doesn't work for cross
   resolveToolchainFull :: ( MonadFail m
                           , MonadThrow m
@@ -291,33 +290,29 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
           pure v
         cabalVer <- forM runCabalVer $ \ver -> do
           (v, _) <- liftE $ fromVersion (Just ver) Cabal
-           pure (_tvVersion v)
+           pure v
         hlsVer <- forM runHLSVer $ \ver -> do
           (v, _) <- liftE $ fromVersion (Just ver) HLS
-           pure (_tvVersion v)
+           pure v
         stackVer <- forM runStackVer $ \ver -> do
           (v, _) <- liftE $ fromVersion (Just ver) Stack
-           pure (_tvVersion v)
+           pure v
         pure Toolchain{..}

   resolveToolchain = do
         ghcVer <- case runGHCVer of
-            Just (GHCVersion v) -> pure $ Just v
-            Just (ToolVersion v) -> pure $ Just (mkTVer v)
+            Just (ToolVersion v) -> pure $ Just v
            Nothing -> pure Nothing
            _ -> fail "Internal error"
         cabalVer <- case runCabalVer of
-            Just (GHCVersion v) -> pure $ Just (_tvVersion v)
            Just (ToolVersion v) -> pure $ Just v
            Nothing -> pure Nothing
            _ -> fail "Internal error"
         hlsVer <- case runHLSVer of
-            Just (GHCVersion v) -> pure $ Just (_tvVersion v)
            Just (ToolVersion v) -> pure $ Just v
            Nothing -> pure Nothing
            _ -> fail "Internal error"
         stackVer <- case runStackVer of
-            Just (GHCVersion v) -> pure $ Just (_tvVersion v)
            Just (ToolVersion v) -> pure $ Just v
            Nothing -> pure Nothing
            _ -> fail "Internal error"
@@ -352,43 +347,35 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
                              , MergeFileTreeError
                              ] (ResourceT (ReaderT AppState m)) ()
   installToolChainFull Toolchain{..} tmp = do
-         case ghcVer of
-           Just v -> do
-             isInstalled <- lift $ checkIfToolInstalled' GHC v
-             unless isInstalled $ when (runInstTool' && isNothing (_tvTarget v)) $ void $ liftE $ installGHCBin
-               (_tvVersion v)
-               GHCupInternal
-               False
-               []
-             setGHC' v tmp
-           _ -> pure ()
-         case cabalVer of
-           Just v -> do
-             isInstalled <- lift $ checkIfToolInstalled' Cabal (mkTVer v)
-             unless isInstalled $ when runInstTool' $ void $ liftE $ installCabalBin
-               v
-               GHCupInternal
-               False
-             setCabal' v tmp
-           _ -> pure ()
-         case stackVer of
-           Just v -> do
-             isInstalled <- lift $ checkIfToolInstalled' Stack (mkTVer v)
-             unless isInstalled $ when runInstTool' $ void $ liftE $ installStackBin
-               v
-               GHCupInternal
-               False
-             setStack' v tmp
-           _ -> pure ()
-         case hlsVer of
-           Just v -> do
-             isInstalled <- lift $ checkIfToolInstalled' HLS (mkTVer v)
-             unless isInstalled $ when runInstTool' $ void $ liftE $ installHLSBin
-               v
-               GHCupInternal
-               False
-             setHLS' v tmp
-           _ -> pure ()
+         forM_ [(GHC,) <$> ghcVer, (Cabal,) <$> cabalVer, (HLS,) <$> hlsVer, (Stack,) <$> stackVer] $ \mt -> do
+           isInstalled <- maybe (pure False) (\(tool, v) -> lift $ checkIfToolInstalled' tool v) mt
+           case mt of
+             Just (GHC, v) -> do
+               unless isInstalled $ when (runInstTool' && isNothing (_tvTarget v)) $ void $ liftE $ installGHCBin
+                 (_tvVersion v)
+                 GHCupInternal
+                 False
+                 []
+               setTool GHC v tmp
+             Just (Cabal, v) -> do
+               unless isInstalled $ when runInstTool' $ void $ liftE $ installCabalBin
+                 (_tvVersion v)
+                 GHCupInternal
+                 False
+               setTool Cabal v tmp
+             Just (Stack, v) -> do
+               unless isInstalled $ when runInstTool' $ void $ liftE $ installStackBin
+                 (_tvVersion v)
+                 GHCupInternal
+                 False
+               setTool Stack v tmp
+             Just (HLS, v) -> do
+               unless isInstalled $ when runInstTool' $ void $ liftE $ installHLSBin
+                 (_tvVersion v)
+                 GHCupInternal
+                 False
+               setTool HLS v tmp
+             _ -> pure ()

   installToolChain :: ( MonadFail m
                       , MonadThrow m
@@ -399,47 +386,46 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
                    -> FilePath
                    -> Excepts '[NotInstalled] (ReaderT LeanAppState m) ()
   installToolChain Toolchain{..} tmp = do
-         case ghcVer of
-           Just v -> setGHC' v tmp
-           _ -> pure ()
-         case cabalVer of
-           Just v -> setCabal' v tmp
-           _ -> pure ()
-         case stackVer of
-           Just v -> setStack' v tmp
-           _ -> pure ()
-         case hlsVer of
-           Just v -> setHLS' v tmp
-           _ -> pure ()
+         forM_ [(GHC,) <$> ghcVer, (Cabal,) <$> cabalVer, (HLS,) <$> hlsVer, (Stack,) <$> stackVer] $ \mt -> do
+           case mt of
+             Just (GHC, v)   -> setTool GHC v tmp
+             Just (Cabal, v) -> setTool Cabal v tmp
+             Just (Stack, v) -> setTool Stack v tmp
+             Just (HLS, v)   -> setTool HLS v tmp
+             _ -> pure ()

-   setGHC' v tmp = do
+   setTool tool v tmp =
+      case tool of
+        GHC -> do
          void $ liftE $ setGHC v SetGHC_XYZ (Just tmp)
          void $ liftE $ setGHC v SetGHCOnly (Just tmp)
-   setCabal' v tmp = do
-          bin  <- liftE $ whereIsTool Cabal (mkTVer v)
+        Cabal -> do
+          bin  <- liftE $ whereIsTool Cabal v
          cbin <- liftIO $ canonicalizePath bin
          lift $ createLink (relativeSymlink tmp cbin) (tmp </> ("cabal" <.> exeExt))
-   setStack' v tmp = do
-          bin  <- liftE $ whereIsTool Stack (mkTVer v)
+        Stack -> do
+          bin  <- liftE $ whereIsTool Stack v
          cbin <- liftIO $ canonicalizePath bin
          lift $ createLink (relativeSymlink tmp cbin) (tmp </> ("stack" <.> exeExt))
-   setHLS' v tmp = do
+        HLS -> do
          Dirs {..}  <- getDirs
-          legacy <- isLegacyHLS v
+          let v' = _tvVersion v
+          legacy <- isLegacyHLS v'
          if legacy
          then do
            -- TODO: factor this out
-            hlsWrapper <- liftE @_ @'[NotInstalled] $ hlsWrapperBinary v !? (NotInstalled HLS (mkTVer v))
+            hlsWrapper <- liftE @_ @'[NotInstalled] $ hlsWrapperBinary v' !? (NotInstalled HLS (mkTVer v'))
            cw <- liftIO $ canonicalizePath (binDir </> hlsWrapper)
            lift $ createLink (relativeSymlink tmp cw) (tmp </> takeFileName cw)
-            hlsBins <- hlsServerBinaries v Nothing >>= liftIO . traverse (canonicalizePath . (binDir </>))
+            hlsBins <- hlsServerBinaries v' Nothing >>= liftIO . traverse (canonicalizePath . (binDir </>))
            forM_ hlsBins $ \bin ->
              lift $ createLink (relativeSymlink tmp bin) (tmp </> takeFileName bin)
-            liftE $ setHLS v SetHLSOnly (Just tmp)
+            liftE $ setHLS (_tvVersion v) SetHLSOnly (Just tmp)
          else do
-            liftE $ setHLS v SetHLS_XYZ (Just tmp)
-            liftE $ setHLS v SetHLSOnly (Just tmp)
-
+            liftE $ setHLS (_tvVersion v) SetHLS_XYZ (Just tmp)
+            liftE $ setHLS (_tvVersion v) SetHLSOnly (Just tmp)
+        GHCup -> pure ()
+       
   addToPath path = do
    cEnv <- Map.fromList <$> getEnvironment
    let paths          = ["PATH", "Path"]
@@ -451,38 +437,16 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
    liftIO $ setEnv pathVar newPath
    return envWithNewPath

-   createTmpDir :: ( MonadUnliftIO m
-                   , MonadCatch m
-                   , MonadThrow m
-                   , MonadMask m
-                   , MonadIO m
-                   )
-                => Toolchain
-                -> ReaderT LeanAppState m FilePath
-   createTmpDir toolchain =
-     case runBinDir of
-           Just bindir -> do
-             liftIO $ createDirRecursive' bindir
-             liftIO $ canonicalizePath bindir
-           Nothing -> do
-             d <- predictableTmpDir toolchain
-             liftIO $ createDirRecursive' d
-             liftIO $ canonicalizePath d
-
-   predictableTmpDir :: Monad m
-                     => Toolchain
-                     -> ReaderT LeanAppState m FilePath
-   predictableTmpDir (Toolchain Nothing Nothing Nothing Nothing) = do
-     Dirs { tmpDir } <- getDirs
-     pure (fromGHCupPath tmpDir </> "ghcup-none")
+   predictableTmpDir (Toolchain Nothing Nothing Nothing Nothing) =
+     liftIO (getTemporaryDirectory >>= \tmp -> pure (tmp </> "ghcup-none"))
   predictableTmpDir Toolchain{..} = do
-      Dirs { tmpDir } <- getDirs
-      pure $ fromGHCupPath tmpDir
+      tmp <- getTemporaryDirectory
+      pure $ tmp
        </> ("ghcup-" <> intercalate "_"
              (  maybe [] ( (:[]) . ("ghc-"   <>) . T.unpack . tVerToText) ghcVer
-              <> maybe [] ( (:[]) . ("cabal-" <>) . T.unpack . prettyVer) cabalVer
-              <> maybe [] ( (:[]) . ("hls-"   <>) . T.unpack . prettyVer) hlsVer
-              <> maybe [] ( (:[]) . ("stack-" <>) . T.unpack . prettyVer) stackVer
+              <> maybe [] ( (:[]) . ("cabal-" <>) . T.unpack . tVerToText) cabalVer
+              <> maybe [] ( (:[]) . ("hls-"   <>) . T.unpack . tVerToText) hlsVer
+              <> maybe [] ( (:[]) . ("stack-" <>) . T.unpack . tVerToText) stackVer
              )
            )

@@ -496,7 +460,7 @@ run RunOptions{..} runAppState leanAppstate runLogger = do

 data Toolchain = Toolchain
  { ghcVer     :: Maybe GHCTargetVersion
-  , cabalVer   :: Maybe Version
-  , hlsVer     :: Maybe Version
-  , stackVer   :: Maybe Version
-  } deriving Show
+  , cabalVer   :: Maybe GHCTargetVersion
+  , hlsVer     :: Maybe GHCTargetVersion
+  , stackVer   :: Maybe GHCTargetVersion
+  }
--- a/app/ghcup/GHCup/OptParse/Set.hs
+++ b/app/ghcup/GHCup/OptParse/Set.hs
@@ -74,7 +74,7 @@ data SetOptions = SetOptions
    --[ Parsers ]--
    ---------------

-
+          
 setParser :: Parser (Either SetCommand SetOptions)
 setParser =
  (Left <$> subparser
@@ -82,7 +82,7 @@ setParser =
          "ghc"
          (   SetGHC
          <$> info
-                (setOpts GHC <**> helper)
+                (setOpts (Just GHC) <**> helper)
                (  progDesc "Set GHC version"
                <> footerDoc (Just $ text setGHCFooter)
                )
@@ -91,7 +91,7 @@ setParser =
           "cabal"
           (   SetCabal
           <$> info
-                 (setOpts Cabal <**> helper)
+                 (setOpts (Just Cabal) <**> helper)
                 (  progDesc "Set Cabal version"
                 <> footerDoc (Just $ text setCabalFooter)
                 )
@@ -100,7 +100,7 @@ setParser =
           "hls"
           (   SetHLS
           <$> info
-                 (setOpts HLS <**> helper)
+                 (setOpts (Just HLS) <**> helper)
                 (  progDesc "Set haskell-language-server version"
                 <> footerDoc (Just $ text setHLSFooter)
                 )
@@ -109,14 +109,14 @@ setParser =
           "stack"
           (   SetStack
           <$> info
-                 (setOpts Stack <**> helper)
+                 (setOpts (Just Stack) <**> helper)
                 (  progDesc "Set stack version"
                 <> footerDoc (Just $ text setStackFooter)
                 )
           )
      )
    )
-    <|> (Right <$> setOpts GHC)
+    <|> (Right <$> setOpts Nothing)
 where
  setGHCFooter :: String
  setGHCFooter = [s|Discussion:
@@ -137,25 +137,22 @@ setParser =
    Sets the the current haskell-language-server version.|]


-setOpts :: Tool -> Parser SetOptions
+setOpts :: Maybe Tool -> Parser SetOptions
 setOpts tool = SetOptions <$>
    (fromMaybe SetRecommended <$>
      optional (setVersionArgument (Just ListInstalled) tool))

-setVersionArgument :: Maybe ListCriteria -> Tool -> Parser SetToolVersion
+setVersionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser SetToolVersion
 setVersionArgument criteria tool =
  argument (eitherReader setEither)
    (metavar "VERSION|TAG|next"
-    <> completer (tagCompleter tool ["next"])
-    <> (completer . versionCompleter criteria) tool)
+    <> completer (tagCompleter (fromMaybe GHC tool) ["next"])
+    <> foldMap (completer . versionCompleter criteria) tool)
 where
  setEither s' =
        parseSet s'
    <|> second SetToolTag (tagEither s')
-    <|> se s'
-  se s' = case tool of
-           GHC -> second SetGHCVersion (ghcVersionEither s')
-           _   -> second SetToolVersion (toolVersionEither s')
+    <|> second SetToolVersion (tVersionEither s')
  parseSet s' = case fmap toLower s' of
                  "next" -> Right SetNext
                  other  -> Left $ "Unknown tag/version " <> other
@@ -264,9 +261,9 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
  (Right sopts) -> do
    runLogger (logWarn "This is an old-style command for setting GHC. Use 'ghcup set ghc' instead.")
    setGHC' sopts
-  (Left (SetGHC sopts))   -> setGHC'   sopts
+  (Left (SetGHC sopts)) -> setGHC' sopts
  (Left (SetCabal sopts)) -> setCabal' sopts
-  (Left (SetHLS sopts))   -> setHLS'   sopts
+  (Left (SetHLS sopts)) -> setHLS' sopts
  (Left (SetStack sopts)) -> setStack' sopts

 where
@@ -274,7 +271,7 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
          -> m ExitCode
  setGHC' SetOptions{ sToolVer } =
    case sToolVer of
-      (SetGHCVersion v) -> runSetGHC runLeanAppState (liftE $ setGHC v SetGHCOnly Nothing >> pure v)
+      (SetToolVersion v) -> runSetGHC runLeanAppState (liftE $ setGHC v SetGHCOnly Nothing >> pure v)
      _ -> runSetGHC runAppState (do
          v <- liftE $ fst <$> fromVersion' sToolVer GHC
          liftE $ setGHC v SetGHCOnly Nothing
@@ -294,17 +291,17 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
            -> m ExitCode
  setCabal' SetOptions{ sToolVer } =
    case sToolVer of
-      (SetToolVersion v) -> runSetCabal runLeanAppState (liftE $ setCabal v >> pure (mkTVer v))
+      (SetToolVersion v) -> runSetCabal runLeanAppState (liftE $ setCabal (_tvVersion v) >> pure v)
      _ -> runSetCabal runAppState (do
          v <- liftE $ fst <$> fromVersion' sToolVer Cabal
          liftE $ setCabal (_tvVersion v)
          pure v
        )
      >>= \case
-            VRight v -> do
+            VRight GHCTargetVersion{..} -> do
              runLogger
                $ logInfo $
-                    "Cabal " <> prettyVer (_tvVersion v) <> " successfully set as default version"
+                    "Cabal " <> prettyVer _tvVersion <> " successfully set as default version"
              pure ExitSuccess
            VLeft  e -> do
              runLogger $ logError $ T.pack $ prettyShow e
@@ -314,17 +311,17 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
          -> m ExitCode
  setHLS' SetOptions{ sToolVer } =
    case sToolVer of
-      (SetToolVersion v) -> runSetHLS runLeanAppState (liftE $ setHLS v SetHLSOnly Nothing >> pure (mkTVer v))
+      (SetToolVersion v) -> runSetHLS runLeanAppState (liftE $ setHLS (_tvVersion v) SetHLSOnly Nothing >> pure v)
      _ -> runSetHLS runAppState (do
          v <- liftE $ fst <$> fromVersion' sToolVer HLS
          liftE $ setHLS (_tvVersion v) SetHLSOnly Nothing
          pure v
        )
      >>= \case
-            VRight v -> do
+            VRight GHCTargetVersion{..} -> do
              runLogger
                $ logInfo $
-                    "HLS " <> prettyVer (_tvVersion v) <> " successfully set as default version"
+                    "HLS " <> prettyVer _tvVersion <> " successfully set as default version"
              pure ExitSuccess
            VLeft  e -> do
              runLogger $ logError $ T.pack $ prettyShow e
@@ -335,17 +332,17 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
            -> m ExitCode
  setStack' SetOptions{ sToolVer } =
    case sToolVer of
-      (SetToolVersion v) -> runSetStack runLeanAppState (liftE $ setStack v >> pure (mkTVer v))
+      (SetToolVersion v) -> runSetStack runLeanAppState (liftE $ setStack (_tvVersion v) >> pure v)
      _ -> runSetStack runAppState (do
            v <- liftE $ fst <$> fromVersion' sToolVer Stack
            liftE $ setStack (_tvVersion v)
            pure v
          )
      >>= \case
-            VRight v -> do
+            VRight GHCTargetVersion{..} -> do
              runLogger
                $ logInfo $
-                    "Stack " <> prettyVer (_tvVersion v) <> " successfully set as default version"
+                    "Stack " <> prettyVer _tvVersion <> " successfully set as default version"
              pure ExitSuccess
            VLeft  e -> do
              runLogger $ logError $ T.pack $ prettyShow e
--- a/app/ghcup/GHCup/OptParse/Whereis.hs
+++ b/app/ghcup/GHCup/OptParse/Whereis.hs
@@ -75,14 +75,14 @@ data WhereisOptions = WhereisOptions {
    --[ Parsers ]--
    ---------------

-
+          
 whereisP :: Parser WhereisCommand
 whereisP = subparser
-  (commandGroup "Tools locations:" <>
+  (commandGroup "Tools locations:" <> 
    command
      "ghc"
      (WhereisTool GHC <$> info
-        ( optional (toolVersionTagArgument Nothing (Just GHC)) <**> helper )
+        ( optional (toolVersionArgument Nothing (Just GHC)) <**> helper )
        ( progDesc "Get GHC location"
        <> footerDoc (Just $ text whereisGHCFooter ))
      )
@@ -90,7 +90,7 @@ whereisP = subparser
     command
      "cabal"
      (WhereisTool Cabal <$> info
-        ( optional (toolVersionTagArgument Nothing (Just Cabal)) <**> helper )
+        ( optional (toolVersionArgument Nothing (Just Cabal)) <**> helper )
        ( progDesc "Get cabal location"
        <> footerDoc (Just $ text whereisCabalFooter ))
      )
@@ -98,7 +98,7 @@ whereisP = subparser
     command
      "hls"
      (WhereisTool HLS <$> info
-        ( optional (toolVersionTagArgument Nothing (Just HLS)) <**> helper )
+        ( optional (toolVersionArgument Nothing (Just HLS)) <**> helper )
        ( progDesc "Get HLS location"
        <> footerDoc (Just $ text whereisHLSFooter ))
      )
@@ -106,7 +106,7 @@ whereisP = subparser
     command
      "stack"
      (WhereisTool Stack <$> info
-        ( optional (toolVersionTagArgument Nothing (Just Stack)) <**> helper )
+        ( optional (toolVersionArgument Nothing (Just Stack)) <**> helper )
        ( progDesc "Get stack location"
        <> footerDoc (Just $ text whereisStackFooter ))
      )
@@ -268,23 +268,9 @@ whereis :: ( Monad m
 whereis whereisCommand whereisOptions runAppState leanAppstate runLogger = do
  Dirs{ .. }  <- runReaderT getDirs leanAppstate
  case (whereisCommand, whereisOptions) of
-    (WhereisTool tool (Just (GHCVersion v)), WhereisOptions{..}) ->
-      runLeanWhereIs leanAppstate (do
-        loc <- liftE $ whereIsTool tool v
-        if directory
-        then pure $ takeDirectory loc
-        else pure loc
-        )
-        >>= \case
-              VRight r -> do
-                liftIO $ putStr r
-                pure ExitSuccess
-              VLeft e -> do
-                runLogger $ logError $ T.pack $ prettyShow e
-                pure $ ExitFailure 30
    (WhereisTool tool (Just (ToolVersion v)), WhereisOptions{..}) ->
      runLeanWhereIs leanAppstate (do
-        loc <- liftE $ whereIsTool tool (mkTVer v)
+        loc <- liftE $ whereIsTool tool v
        if directory
        then pure $ takeDirectory loc
        else pure loc
--- a/app/ghcup/Main.hs
+++ b/app/ghcup/Main.hs
@@ -14,8 +14,6 @@ module Main where
 import           BrickMain                    ( brickMain )
 #endif

-import qualified GHCup.GHC as GHC
-import qualified GHCup.HLS as HLS
 import           GHCup.OptParse

 import           GHCup.Download
@@ -28,6 +26,7 @@ import           GHCup.Prelude
 import           GHCup.Prelude.Logger
 import           GHCup.Prelude.String.QQ
 import           GHCup.Version
+import GHC.Debug.Stub

 import           Cabal.Plan ( findPlanJson, SearchPlanJson(..) )
 import           Control.Concurrent
@@ -122,7 +121,7 @@ plan_json = $( do


 main :: IO ()
-main = do
+main = withGhcDebug $ do
  -- https://gitlab.haskell.org/ghc/ghc/issues/8118
  setLocaleEncoding utf8

@@ -238,7 +237,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                    | Just False <- optVerbose -> pure ()
                    | otherwise -> lookupEnv "GHCUP_SKIP_UPDATE_CHECK" >>= \case
                         Nothing -> void . flip runReaderT s' . runE @'[TagNotFound, NextVerNotFound, NoToolVersionSet] $ do
-                           newTools <- lift checkForUpdates
+                           newTools <- lift checkForUpdates 
                           forM_ newTools $ \newTool@(t, l) -> do
                             -- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/283
                             alreadyInstalling' <- alreadyInstalling optCommand newTool
@@ -279,7 +278,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
              runAppState action' = do
                s' <- liftIO appState
                runReaderT action' s'
-
+                  

          -----------------
          -- Run command --
@@ -339,16 +338,14 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
  alreadyInstalling (Install (Left (InstallHLS InstallOptions{..})))     (HLS, ver)   = cmp' HLS instVer ver
  alreadyInstalling (Install (Left (InstallStack InstallOptions{..})))   (Stack, ver) = cmp' Stack instVer ver
  alreadyInstalling (Compile (CompileGHC GHCCompileOptions{ ovewrwiteVer = Just over }))
-    (GHC, ver)   = cmp' GHC (Just $ GHCVersion (mkTVer over)) ver
-  alreadyInstalling (Compile (CompileGHC GHCCompileOptions{ targetGhc = GHC.SourceDist tver }))
-    (GHC, ver)   = cmp' GHC (Just $ ToolVersion tver) ver
-  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ ovewrwiteVer = Right over }))
-    (HLS, ver)   = cmp' HLS (Just $ ToolVersion over) ver
-  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ targetHLS = HLS.SourceDist tver }))
-    (HLS, ver)   = cmp' HLS (Just $ ToolVersion tver) ver
-  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ targetHLS = HLS.HackageDist tver }))
-    (HLS, ver)   = cmp' HLS (Just $ ToolVersion tver) ver
-  alreadyInstalling (Upgrade {}) (GHCup, _) = pure True
+    (GHC, ver)   = cmp' GHC (Just $ ToolVersion (mkTVer over)) ver
+  alreadyInstalling (Compile (CompileGHC GHCCompileOptions{ targetGhc = Left tver }))
+    (GHC, ver)   = cmp' GHC (Just $ ToolVersion (mkTVer tver)) ver
+  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ ovewrwiteVer = Just over }))
+    (HLS, ver)   = cmp' HLS (Just $ ToolVersion (mkTVer over)) ver
+  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ targetHLS = Left tver }))
+    (HLS, ver)   = cmp' HLS (Just $ ToolVersion (mkTVer tver)) ver
+  alreadyInstalling (Upgrade _ _ _) (GHCup, _) = pure True
  alreadyInstalling _ _ = pure False

  cmp' :: ( HasLog env
--- a/cabal.project
+++ b/cabal.project
@@ -32,4 +32,7 @@ package aeson
 package streamly
  flags: +use-unliftio

+package *
+  ghc-options: -finfo-table-map -fdistinct-constructor-tables
+
 allow-newer: base, ghc-prim, template-haskell, language-c
--- a/docs/about.md
+++ b/docs/about.md
@@ -74,15 +74,12 @@ cabal-install/HLS/stack are installed in `~/.ghcup/bin/<tool>-<ver>` and have un

 ## Known users

-* CI:
-	- [Github actions/virtual-environments](https://github.com/actions/virtual-environments)
-	- [Github haskell/actions/setup](https://github.com/haskell/actions/tree/main/setup)
-	- [haskell-ci](https://github.com/haskell-CI/haskell-ci)
+* Github actions:
+	- [actions/virtual-environments](https://github.com/actions/virtual-environments)
+	- [haskell/actions/setup](https://github.com/haskell/actions/tree/main/setup)
 * mirrors:
 	- [sjtug](https://mirror.sjtu.edu.cn/docs/ghcup)
 * tools:
-	- [vscode-haskell](https://github.com/haskell/vscode-haskell)
-	- [nvim-lsp-installer](https://github.com/williamboman/nvim-lsp-installer)
 	- [vabal](https://github.com/Franciman/vabal)

 ## Known problems
--- a/docs/guide.md
+++ b/docs/guide.md
@@ -4,7 +4,7 @@ This is a more in-depth guide specific to GHCup. `ghcup --help` is your friend.

 ## Basic usage

-For the simple, interactive, text-based user interface (TUI) (not available on windows), run:
+For the simple interactive TUI (not available on windows), run:

 ```sh
 ghcup tui
@@ -186,51 +186,6 @@ url-source:

 # More on installation

-## Customisation of the installation scripts
-
-The scripts offered to install GHCup are available here:
-
-* [bootstrap-haskell](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell#L7)
-  for Unix-like operating systems
-* [bootstrap-haskell.ps1](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1#L17)
-  for Windows (PowerShell). This will, in turn, run the final bootstrap script
-  (by default, that for the Unix-like operating systems).
-
-The effect of the scripts can be customised by setting one or more
-`BOOTSTRAP_HASKELL_*` environment variables (as set out in the first script)
-and, in the case of Windows, by specifying parameters (as set out in the
-PowerShell script).
-
-For example, you can toggle:
-
-* non-interactive installation
-* a more verbose installation
-* whether to install only GHCup (and, on Windows, MSYS2)
-* not to trigger the upgrade of GHCup
-* whether to install the latest version of HLS
-* whether to install the latest version of Stack
-* whether to respect the XDG Base Directory Specification
-* whether to adjust (prepend) the PATH in `bashrc`
-* on Windows, whether to adjust MINGW paths in `cabal.config`
-
-You can also specify:
-
-* the GHC version to install
-* the Cabal version to install
-* which downloader to use (the default is `curl`)
-* the base URL for the download of the GHCup binary distribution
-
-On Windows, you can also use the parameters to:
-
-* toggle whether to overwrite a previous installation
-* specify the GHCup installation root directory
-* specify the Cabal root directory
-* specify the directory of an existing installation of MSYS2 (for example,
-  the one supplied by Stack)
-* specify the URL of the final bootstrap script
-* toggle whether to run the final bootstrap script via `bash` (instead of in a
-  new MSYS2 shell)
-
 ## Installing custom bindists

 There are a couple of good use cases to install custom bindists:
@@ -247,9 +202,7 @@ and produce the binaries `ghc-8.10.2-eff` and `ghc-head` respectively.
 GHCup always needs to know which version the bindist corresponds to (this is not automatically
 detected).

-## Compiling from source
-
-### GHC
+## Compiling GHC from source

 Compiling from source is supported for both source tarballs and arbitrary git refs. See `ghcup compile ghc --help`
 for a list of all available options.
@@ -261,47 +214,6 @@ Common `build.mk` options are explained [here](https://gitlab.haskell.org/ghc/gh

 Make sure your system meets all the [prerequisites](https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation).

-### HLS
-
-There are 3 main ways to compile HLS from source.
-
-1. from hackage (should have up to date version bounds)
-    - `ghcup compile hls --version 1.7.0.0 --ghc 9.2.3`
-2. from git (allows to build latest sources and PRs)
-    - `ghcup compile hls --git-ref master --ghc 9.2.3`
-    - `ghcup compile hls --git-ref a32db0b --ghc 9.2.3`
-    - `ghcup compile hls --git-ref 1.7.0.0 --ghc 9.2.3`
-3. from source distribution that's packaged during release from the corresponding git sources
-    - `ghcup compile hls --source-dist 1.7.0.0 --ghc 9.2.3`
-
-All these use `cabal v2-install` under the hood, so all build components are cached.
-You can pass arbitrary arguments to cabal, e.g. set the index state like so:
-
-```sh
-ghcup compile hls --git-ref master --ghc 9.2.3 -- --index-state=2022-06-12T00:00:00Z --allow-newer
-```
-
-You can pass `--ghc <ver>` multiple times to install for many GHCs at once.
-
-When building from git sources, ghcup will auto-detect the HLS version that the git commit corresponds to
-from the `haskell-language-server.cabal` file. This version might not have been updated since the last release.
-If you want to avoid overwriting the existing installed HLS version, you can instruct ghcup to use `git describe`
-to set the HLS version instead:
-
-```sh
-ghcup compile hls --git-ref master --ghc 9.2.3 --git-describe-version
-```
-
-You can also set the version explicitly:
-
-```sh
-ghcup compile hls --git-ref master --ghc 9.2.3 --overwrite-version 1.7.0.0-p1
-```
-
-To instruct cabal to run `cabal update` before building, run `ghcup compile hls --version 1.7.0.0 --ghc 9.2.3 --cabal-update`
-
-As always, check `ghcup compile hls --help`.
-
 ### Cross support

 ghcup can compile and install a cross GHC for any target. However, this
@@ -346,9 +258,7 @@ Examples:

 ## Continuous integration

-On Windows, GHCup can be installed automatically on a CI runner
-non-interactively, as below. The paramaters to the PowerShell script are
-specified positionally, after `-ArgumentList`:
+On windows, ghcup can be installed automatically on a CI runner non-interactively like so:

 ```ps
 Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $false,$true,$true,$false,$false,$false,$false,"C:\"
@@ -360,10 +270,12 @@ On linux/darwin/freebsd, run the following on your runner:
 curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 BOOTSTRAP_HASKELL_MINIMAL=1 sh
 ```

-This will just install `ghcup` and on Windows additionally MSYS2.
+This will just install `ghcup` and on windows additionally `msys2`.

-See the installation scripts referred to above for the full list of environment
-variables and, in the case of Windows, parameters to tweak the script behavior.
+For the full list of env variables and parameters to tweak the script behavior, see:
+
+* [bootstrap-haskell for linux/darwin/freebsd](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell#L7)
+* [bootstrap-haskell.ps1 for windows](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1#L17)

 ### github workflows

@@ -398,7 +310,7 @@ gpg-setting: GPGLax # GPGStrict | GPGLax | GPGNone

 In `GPGStrict` mode, ghcup will fail if verification fails. In `GPGLax` mode it will just print a warning.
 You can also pass the mode via `ghcup --gpg <strict|lax|none>`.
-
+   
 # Tips and tricks

 ## ghcup run
@@ -412,34 +324,3 @@ ghcup run --ghc 8.10.7 --cabal latest --hls latest --stack latest --install -- c
 ```

 This will execute vscode with GHC set to 8.10.7 and all other tools to their latest version.
-
-# Troubleshooting
-
-## Script immediately exits on windows
-
-There are two possible reasons:
-
-1. your company blocks the script (some have a whitelist)... ask your administrator
-2. your Antivirus or Windows Defender interfere with the installation. Disable them temporarily.
-
-## C compiler cannot create executables
-
-### Darwin
-
-You need to update your XCode command line tools, e.g. [like this](https://stackoverflow.com/questions/34617452/how-to-update-xcode-from-command-line).
-
-## Certificate authority errors (curl)
-
-If your certificates are outdated or improperly configured, curl may be unable
-to download ghcup.
-
-There are two known workarounds:
-
-1. Tell curl to ignore certificate errors (dangerous): `curl -k https://gitlab.haskell.org/haskell/ghcup-hs/-/raw/master/scripts/bootstrap/bootstrap-haskell | GHCUP_CURL_OPTS="-k" sh`
-2. Try to use wget instead: `wget -O /dev/stdout https://gitlab.haskell.org/haskell/ghcup-hs/-/raw/master/scripts/bootstrap/bootstrap-haskell | BOOTSTRAP_HASKELL_DOWNLOADER=wget sh`
-
-On windows, you can disable curl like so:
-
-```pwsh
-Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true,$false,$false,$false,$false,$false,$false,"","","","",$true
-```
--- a/docs/index.md
+++ b/docs/index.md
@@ -57,7 +57,7 @@ hide:
 </section>

 <p id="help" class="ghcup-help">
-  Need help? Check the <a href="guide/#troubleshooting">Troubleshooting section</a> or ask on
+  Need help? Ask on
  <span>
    <a href="https://kiwiirc.com/nextclient/irc.libera.chat/?nick=Guest%7C?#haskell,#haskell-ghcup">
      <img src="irc.svg" alt="" />
--- a/docs/install.md
+++ b/docs/install.md
@@ -200,14 +200,6 @@ export PATH="$HOME/.cabal/bin:$HOME/.ghcup/bin:$PATH"

 See [ghcup.vim](https://github.com/hasufell/ghcup.vim).

-## VSCode integration
-The developers of the Haskell Language Server offer an [extension](https://github.com/haskell/vscode-haskell) tightly integrated with the [Haskell Language Server](https://github.com/haskell/haskell-language-server). To get started:
-
-1. Install GHCup. During installation, opt in to install the Haskell Language Server (HLS).
-2. Install the extension (from VSCode: Ctrl + P and then `ext install haskell.haskell`).
-3. Make sure your project uses the GHC version installed from GHCup (otherwise HLS is likely to fail on launch):
-    - instructions for [stack](https://docs.haskellstack.org/en/stable/yaml_configuration/#system-ghc)
-
 ## Get help

 * [Libera IRC chat on #haskell-ghcup or #haskell](https://kiwiirc.com/nextclient/irc.libera.chat/?nick=Guest%7C?#haskell,#haskell-ghcup)
--- a/ghcup.cabal
+++ b/ghcup.cabal
@@ -69,7 +69,6 @@ library
    GHCup.Prelude.Process
    GHCup.Prelude.String.QQ
    GHCup.Prelude.Version.QQ
-    GHCup.Prompts
    GHCup.Requirements
    GHCup.Stack
    GHCup.Types
@@ -110,7 +109,7 @@ library
    , base16-bytestring     >=0.1.1.6    && <1.1
    , binary                ^>=0.8.6.0
    , bytestring            >=0.10       && <0.12
-    , Cabal                 ^>=3.0.0.0 || ^>=3.2.0.0 || ^>=3.4.0.0 || ^>=3.6.0.0
+    , Cabal                 ^>=3.6.2.0
    , case-insensitive      ^>=1.2.1.0
    , casing                ^>=0.1.4.1
    , containers            ^>=0.6
@@ -165,10 +164,8 @@ library
    cpp-options:   -DIS_WINDOWS
    other-modules:
      GHCup.Prelude.File.Windows
-      GHCup.Prelude.Windows
-    -- GHCup.OptParse.Run uses this
-    exposed-modules:
      GHCup.Prelude.Process.Windows
+      GHCup.Prelude.Windows

    build-depends:
      , bzlib
@@ -243,6 +240,7 @@ executable ghcup
    , deepseq               ^>=1.4
    , directory             ^>=1.3.6.0
    , filepath              ^>=1.4.2.1
+    , ghc-debug-stub
    , ghcup
    , haskus-utils-types    ^>=1.5
    , haskus-utils-variant  ^>=3.2.1
--- a/lib/GHCup.hs
+++ b/lib/GHCup.hs
@@ -33,8 +33,8 @@ module GHCup (


 import           GHCup.Cabal
-import           GHCup.GHC             hiding ( GHCVer(..) )
-import           GHCup.HLS             hiding ( HLSVer(..) )
+import           GHCup.GHC
+import           GHCup.HLS
 import           GHCup.Stack
 import           GHCup.List
 import           GHCup.Download
@@ -206,8 +206,9 @@ rmGhcupDirs = do
      | isWindows = removeDirIfEmptyOrIsSymlink binDir
      | otherwise = do
          isXDGStyle <- liftIO useXDG
-          when (not isXDGStyle) $
-            removeDirIfEmptyOrIsSymlink binDir
+          if not isXDGStyle
+            then removeDirIfEmptyOrIsSymlink binDir
+            else pure ()

    reportRemainingFiles :: (MonadMask m, MonadIO m) => FilePath -> m [FilePath]
    reportRemainingFiles dir = do
--- a/lib/GHCup/Errors.hs
+++ b/lib/GHCup/Errors.hs
@@ -137,7 +137,7 @@ data AlreadyInstalled = AlreadyInstalled Tool Version

 instance Pretty AlreadyInstalled where
  pPrint (AlreadyInstalled tool ver') =
-    (pPrint tool <> text "-" <> pPrint ver') <+> text "is already installed;"
+    pPrint tool <+> text "-" <+> pPrint ver' <+> text "is already installed;"
    <+> text "if you really want to reinstall it, you may want to run 'ghcup install cabal --force" <+> (pPrint ver' <> text "'")


--- a/lib/GHCup/GHC.hs
+++ b/lib/GHCup/GHC.hs
@@ -80,12 +80,6 @@ import qualified Data.Text.Encoding            as E
 import qualified Text.Megaparsec               as MP


-data GHCVer v = SourceDist v
-              | GitDist GitBranch
-              | RemoteDist URI
-
-
-
    ---------------------
    --[ Tool fetching ]--
    ---------------------
@@ -301,9 +295,8 @@ installUnpackedGHC path inst ver forceInstall addConfArgs
  | otherwise = do
      PlatformRequest {..} <- lift getPlatformReq

-      let ldOverride
-           | ver >= [vver|8.2.2|]
-           , _rPlatform `elem` [Linux Alpine, Darwin]
+      let alpineArgs
+           | ver >= [vver|8.2.2|], Linux Alpine <- _rPlatform
           = ["--disable-ld-override"]
           | otherwise
           = []
@@ -311,7 +304,7 @@ installUnpackedGHC path inst ver forceInstall addConfArgs
      lift $ logInfo "Installing GHC (this may take a while)"
      lEM $ execLogged "sh"
                       ("./configure" : ("--prefix=" <> fromInstallDir inst)
-                        : (ldOverride <> (T.unpack <$> addConfArgs))
+                        : (alpineArgs <> (T.unpack <$> addConfArgs))
                       )
                       (Just $ fromGHCupPath path)
                       "ghc-configure"
@@ -573,11 +566,8 @@ rmGHCVer ver = do
      lift $ recycleFile f
      when (not (null survivors)) $ throwE $ UninstallFailed dir survivors
    Nothing -> do
-      isDir <- liftIO $ doesDirectoryExist dir
-      isSyml <- liftIO $ handleIO (\_ -> pure False) $ pathIsSymbolicLink dir
-      when (isDir && not isSyml) $ do
-        lift $ logInfo $ "Removing legacy directory recursively: " <> T.pack dir
-        recyclePathForcibly dir'
+      lift $ logInfo $ "Removing legacy directory recursively: " <> T.pack dir
+      lift $ recyclePathForcibly dir'

  v' <-
    handle
@@ -614,7 +604,7 @@ compileGHC :: ( MonadMask m
              , MonadUnliftIO m
              , MonadFail m
              )
-           => GHCVer GHCTargetVersion
+           => Either GHCTargetVersion GitBranch          -- ^ version to install
           -> Maybe Version            -- ^ overwrite version
           -> Either Version FilePath  -- ^ version to bootstrap with
           -> Maybe Int                -- ^ jobs
@@ -657,7 +647,7 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr

    (workdir, tmpUnpack, tver) <- case targetGhc of
      -- unpack from version tarball
-      SourceDist tver -> do
+      Left tver -> do
        lift $ logDebug $ "Requested to compile: " <> tVerToText tver <> " with " <> either prettyVer T.pack bstrap

        -- download source tarball
@@ -678,31 +668,8 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr

        pure (workdir, tmpUnpack, tver)

-      RemoteDist uri -> do
-        lift $ logDebug $ "Requested to compile (from uri): " <> T.pack (show uri)
-
-        -- download source tarball
-        tmpDownload <- lift withGHCupTmpDir
-        tmpUnpack <- lift mkGhcupTmpDir
-        tar <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpDownload) Nothing False
-        (bf, tver) <- liftE $ cleanUpOnError @'[UnknownArchive, ArchiveResult, ProcessError] tmpUnpack $ do
-          liftE $ unpackToDir (fromGHCupPath tmpUnpack) tar
-          let regex = [s|^(.*/)*boot$|] :: B.ByteString
-          [bootFile] <- liftIO $ findFilesDeep
-            tmpUnpack
-            (makeRegexOpts compExtended
-                           execBlank
-                           regex
-            )
-          tver <- liftE $ getGHCVer (appendGHCupPath tmpUnpack (takeDirectory bootFile))
-          pure (bootFile, tver)
-
-        let workdir = appendGHCupPath tmpUnpack (takeDirectory bf)
-
-        pure (workdir, tmpUnpack, mkTVer tver)
-
      -- clone from git
-      GitDist GitBranch{..} -> do
+      Right GitBranch{..} -> do
        tmpUnpack <- lift mkGhcupTmpDir
        let git args = execLogged "git" ("--no-pager":args) (Just $ fromGHCupPath tmpUnpack) "git" Nothing
        tver <- reThrowAll @_ @'[PatchFailed, ProcessError, NotFoundInPATH, DigestError, DownloadFailed, GPGError] DownloadFailed $ do
@@ -714,46 +681,28 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
                    , "origin"
                    , fromString rep ]

-          -- figure out if we can do a shallow clone
-          remoteBranches <- catchE @ProcessError @'[PatchFailed, ProcessError, NotFoundInPATH, DigestError, DownloadFailed, GPGError] @'[PatchFailed, NotFoundInPATH, DigestError, DownloadFailed, GPGError] (\(_ :: ProcessError) -> pure [])
-              $ fmap processBranches $ gitOut ["ls-remote", "--heads", "origin"] (fromGHCupPath tmpUnpack)
-          let shallow_clone
-                | isCommitHash ref                     = True
-                | fromString ref `elem` remoteBranches = True
-                | otherwise                            = False
-          lift $ logDebug $ "Shallow clone: " <> T.pack (show shallow_clone)
-
-          -- fetch
-          let fetch_args
-                | shallow_clone = ["fetch", "--depth", "1", "--quiet", "origin", fromString ref]
-                | otherwise     = ["fetch", "--tags",       "--quiet", "origin"                ]
+          let fetch_args =
+                    [ "fetch"
+                    , "--depth"
+                    , "1"
+                    , "--quiet"
+                    , "origin"
+                    , fromString ref ]
          lEM $ git fetch_args

-          -- initial checkout
-          lEM $ git [ "checkout", fromString ref ]
-
-          -- gather some info
-          git_describe <- if shallow_clone
-                          then pure Nothing
-                          else fmap Just $ liftE $ gitOut ["describe", "--tags"] (fromGHCupPath tmpUnpack)
-          chash <- liftE $ gitOut ["rev-parse", "HEAD" ] (fromGHCupPath tmpUnpack)
-
-          -- clone submodules
+          lEM $ git [ "checkout", "FETCH_HEAD" ]
          lEM $ git [ "submodule", "update", "--init", "--depth", "1" ]
-
-          -- apply patches
          liftE $ applyAnyPatch patches (fromGHCupPath tmpUnpack)
+          lEM $ execWithGhcEnv "python3" ["./boot"] (Just $ fromGHCupPath tmpUnpack) "ghc-bootstrap"
+          lEM $ execWithGhcEnv "sh" ["./configure"] (Just $ fromGHCupPath tmpUnpack) "ghc-bootstrap"
+          CapturedProcess {..} <- lift $ makeOut
+            ["show!", "--quiet", "VALUE=ProjectVersion" ] (Just $ fromGHCupPath tmpUnpack)
+          case _exitCode of
+            ExitSuccess -> throwEither . MP.parse ghcProjectVersion "" . decUTF8Safe' $ _stdOut
+            ExitFailure c -> fail ("Could not figure out GHC project version. Exit code was: " <> show c <> ". Error was: " <> T.unpack (decUTF8Safe' _stdErr))

-          -- bootstrap
-          tver <- liftE $ getGHCVer tmpUnpack
-          liftE $ catchWarn $ lEM @_ @'[ProcessError] $ darwinNotarization _rPlatform (fromGHCupPath tmpUnpack)
-          lift $ logInfo $ "Examining git ref " <> T.pack ref <> "\n  " <>
-                           "GHC version (from Makefile): " <> prettyVer tver <>
-                           (if not shallow_clone then "\n  " <> "'git describe' output: " <> fromJust git_describe else mempty) <>
-                           (if isCommitHash ref then mempty else "\n  " <> "commit hash: " <> chash)
-          liftIO $ threadDelay 5000000 -- give the user a sec to intervene
-
-          pure tver
+        liftE $ catchWarn $ lEM @_ @'[ProcessError] $ darwinNotarization _rPlatform (fromGHCupPath tmpUnpack)
+        lift $ logInfo $ "Git version " <> T.pack ref <> " corresponds to GHC version " <> prettyVer tver

        pure (tmpUnpack, tmpUnpack, GHCTargetVersion Nothing tver)
    -- the version that's installed may differ from the
@@ -818,29 +767,11 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
    pure installVer

 where
-  getGHCVer :: ( MonadReader env m
-               , HasSettings env
-               , HasDirs env
-               , HasLog env
-               , MonadIO m
-               , MonadThrow m
-               )
-            => GHCupPath
-            -> Excepts '[ProcessError] m Version
-  getGHCVer tmpUnpack = do
-    lEM $ execWithGhcEnv "python3" ["./boot"] (Just $ fromGHCupPath tmpUnpack) "ghc-bootstrap"
-    lEM $ execWithGhcEnv "sh" ["./configure"] (Just $ fromGHCupPath tmpUnpack) "ghc-bootstrap"
-    CapturedProcess {..} <- lift $ makeOut
-      ["show!", "--quiet", "VALUE=ProjectVersion" ] (Just $ fromGHCupPath tmpUnpack)
-    case _exitCode of
-      ExitSuccess -> throwEither . MP.parse ghcProjectVersion "" . T.pack . stripNewlineEnd . T.unpack . decUTF8Safe' $ _stdOut
-      ExitFailure c -> throwE $ NonZeroExit c "make" ["show!", "--quiet", "VALUE=ProjectVersion" ]
-
  defaultConf =
    let cross_mk = $(LitE . StringL <$> (qAddDependentFile "data/build_mk/cross" >> runIO (readFile "data/build_mk/cross")))
        default_mk = $(LitE . StringL <$> (qAddDependentFile "data/build_mk/default" >> runIO (readFile "data/build_mk/default")))
    in case targetGhc of
-         SourceDist (GHCTargetVersion (Just _) _) -> cross_mk
+         Left (GHCTargetVersion (Just _) _) -> cross_mk
         _ -> default_mk

  compileHadrianBindist :: ( MonadReader env m
@@ -1017,7 +948,7 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr

   -- for cross, we need Stage1Only
    case targetGhc of
-      SourceDist (GHCTargetVersion (Just _) _) -> when ("Stage1Only = YES" `notElem` lines') $ throwE
+      Left (GHCTargetVersion (Just _) _) -> when ("Stage1Only = YES" `notElem` lines') $ throwE
        (InvalidBuildConfig
          [s|Cross compiling needs to be a Stage1 build, add "Stage1Only = YES" to your config!|]
        )
--- a/lib/GHCup/HLS.hs
+++ b/lib/GHCup/HLS.hs
@@ -71,12 +71,6 @@ import qualified Text.Megaparsec               as MP
 import Text.PrettyPrint.HughesPJClass (prettyShow)


-data HLSVer = SourceDist Version
-            | GitDist GitBranch
-            | HackageDist Version
-            | RemoteDist URI
-
-

    --------------------
    --[ Installation ]--
@@ -330,14 +324,13 @@ compileHLS :: ( MonadMask m
              , MonadUnliftIO m
              , MonadFail m
              )
-           => HLSVer
+           => Either Version GitBranch
           -> [Version]
           -> Maybe Int
-           -> Either Bool Version
+           -> Maybe Version
           -> InstallDir
           -> Maybe (Either FilePath URI)
           -> Maybe URI
-           -> Bool
           -> Maybe (Either FilePath [URI])  -- ^ patches
           -> [Text]                   -- ^ additional args to cabal install
           -> Excepts '[ NoDownload
@@ -350,18 +343,15 @@ compileHLS :: ( MonadMask m
                       , BuildFailed
                       , NotInstalled
                       ] m Version
-compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal updateCabal patches cabalArgs = do
+compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal patches cabalArgs = do
  PlatformRequest { .. } <- lift getPlatformReq
  GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
  Dirs { .. } <- lift getDirs

-  when updateCabal $ reThrowAll @_ @'[ProcessError] DownloadFailed $ do
-    lift $ logInfo "Updating cabal DB"
-    lEM $ exec "cabal" ["update"] (Just $ fromGHCupPath tmpDir) Nothing

-  (workdir, tmpUnpack, tver, git_describe) <- case targetHLS of
+  (workdir, tver) <- case targetHLS of
    -- unpack from version tarball
-    SourceDist tver -> do
+    Left tver -> do
      lift $ logDebug $ "Requested to compile: " <> prettyVer tver

      -- download source tarball
@@ -379,50 +369,13 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal upda
                       (liftE . intoSubdir tmpUnpack)
                       (view dlSubdir dlInfo)

-      pure (workdir, tmpUnpack, tver, Nothing)
-
-    HackageDist tver -> do
-      lift $ logDebug $ "Requested to compile (from hackage): " <> prettyVer tver
-
-      -- download source tarball
-      tmpUnpack <- lift mkGhcupTmpDir
-      let hls = "haskell-language-server-" <> T.unpack (prettyVer tver)
-      reThrowAll @_ @'[ProcessError] DownloadFailed $ do
-        -- unpack
-        lEM $ exec "cabal" ["unpack", hls] (Just $ fromGHCupPath tmpUnpack) Nothing
-
-      let workdir = appendGHCupPath tmpUnpack hls
-
-      pure (workdir, tmpUnpack, tver, Nothing)
-
-    RemoteDist uri -> do
-      lift $ logDebug $ "Requested to compile (from uri): " <> T.pack (show uri)
-
-      -- download source tarball
-      tmpDownload <- lift withGHCupTmpDir
-      tmpUnpack <- lift mkGhcupTmpDir
-      tar <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpDownload) Nothing False
-      (cf, tver) <- liftE $ cleanUpOnError tmpUnpack $ do
-        unpackToDir (fromGHCupPath tmpUnpack) tar
-        let regex = [s|^(.*/)*haskell-language-server\.cabal$|] :: B.ByteString
-        [cabalFile] <- liftIO $ findFilesDeep
-          tmpUnpack
-          (makeRegexOpts compExtended
-                         execBlank
-                         regex
-          )
-        tver <- getCabalVersion (fromGHCupPath tmpUnpack </> cabalFile)
-        pure (cabalFile, tver)
-
-      let workdir = appendGHCupPath tmpUnpack (takeDirectory cf)
-
-      pure (workdir, tmpUnpack, tver, Nothing)
+      pure (workdir, tver)

    -- clone from git
-    GitDist GitBranch{..} -> do
+    Right GitBranch{..} -> do
      tmpUnpack <- lift mkGhcupTmpDir
      let git args = execLogged "git" ("--no-pager":args) (Just $ fromGHCupPath tmpUnpack) "git" Nothing
-      reThrowAll @_ @'[ProcessError] DownloadFailed $ do
+      tver <- reThrowAll @_ @'[ProcessError] DownloadFailed $ do
        let rep = fromMaybe "https://github.com/haskell/haskell-language-server.git" repo
        lift $ logInfo $ "Fetching git repo " <> T.pack rep <> " at ref " <> T.pack ref <> " (this may take a while)"
        lEM $ git [ "init" ]
@@ -431,56 +384,36 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal upda
                  , "origin"
                  , fromString rep ]

-        -- figure out if we can do a shallow clone
-        remoteBranches <- catchE @ProcessError @'[ProcessError] @'[] (\_ -> pure [])
-            $ fmap processBranches $ gitOut ["ls-remote", "--heads", "origin"] (fromGHCupPath tmpUnpack)
-        let shallow_clone
-              | gitDescribeRequested                 = False
-              | isCommitHash ref                     = True
-              | fromString ref `elem` remoteBranches = True
-              | otherwise                            = False
-
-        lift $ logDebug $ "Shallow clone: " <> T.pack (show shallow_clone)
-
-        -- fetch
-        let fetch_args
-              | shallow_clone = ["fetch", "--depth", "1", "--quiet", "origin", fromString ref]
-              | otherwise     = ["fetch", "--tags",       "--quiet", "origin"                ]
+        let fetch_args =
+                  [ "fetch"
+                  , "--depth"
+                  , "1"
+                  , "--quiet"
+                  , "origin"
+                  , fromString ref ]
        lEM $ git fetch_args

-        -- checkout
-        lEM $ git [ "checkout", fromString ref ]
+        lEM $ git [ "checkout", "FETCH_HEAD" ]
+        (Just gpd) <- parseGenericPackageDescriptionMaybe <$> liftIO (B.readFile (fromGHCupPath tmpUnpack </> "haskell-language-server.cabal"))
+        pure . (\c -> Version Nothing c [] Nothing)
+          . NE.fromList . fmap (NE.fromList . (:[]) . digits . fromIntegral)
+          . versionNumbers
+          . pkgVersion
+          . package
+          . packageDescription
+          $ gpd

-        -- gather some info
-        git_describe <- if shallow_clone
-                        then pure Nothing
-                        else fmap Just $ gitOut ["describe", "--tags"] (fromGHCupPath tmpUnpack)
-        chash <- gitOut ["rev-parse", "HEAD" ] (fromGHCupPath tmpUnpack)
-        tver <- getCabalVersion (fromGHCupPath tmpUnpack </> "haskell-language-server.cabal")
+      liftE $ catchWarn $ lEM @_ @'[ProcessError] $ darwinNotarization _rPlatform (fromGHCupPath tmpUnpack)
+      lift $ logInfo $ "Git version " <> T.pack ref <> " corresponds to HLS version " <> prettyVer tver

-        liftE $ catchWarn $ lEM @_ @'[ProcessError] $ darwinNotarization _rPlatform (fromGHCupPath tmpUnpack)
-        lift $ logInfo $ "Examining git ref " <> T.pack ref <> "\n  " <>
-                                    "HLS version (from cabal file): " <> prettyVer tver <>
-                                    (if not shallow_clone then "\n  " <> "'git describe' output: " <> fromJust git_describe else mempty) <>
-                                    (if isCommitHash ref then mempty else "\n  " <> "commit hash: " <> chash)
-
-        pure (tmpUnpack, tmpUnpack, tver, git_describe)
+      pure (tmpUnpack, tver)

  -- the version that's installed may differ from the
  -- compiled version, so the user can overwrite it
-  installVer <- case ov of
-                  Left True -> case git_describe of
-                                 -- git describe
-                                 Just h -> either (fail . displayException) pure . version $ h
-                                 -- git describe, but not building from git, lol
-                                 Nothing -> pure tver
-                  -- default: use detected version
-                  Left False -> pure tver
-                  -- overwrite version with users value
-                  Right v -> pure v
+  let installVer = fromMaybe tver ov

  liftE $ runBuildAction
-    tmpUnpack
+    workdir
    (reThrowAll @_ @'[GPGError, DownloadFailed, DigestError, PatchFailed, ProcessError, FileAlreadyExistsError, CopyError] @'[BuildFailed] (BuildFailed $ fromGHCupPath workdir) $ do
      let tmpInstallDir = fromGHCupPath workdir </> "out"
      liftIO $ createDirRecursive' tmpInstallDir
@@ -496,22 +429,14 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal upda
              pure "cabal.project"
          | otherwise -> pure (takeFileName cp)
        Just (Right uri) -> do
-          tmpUnpack' <- lift withGHCupTmpDir
-          cp <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpUnpack') (Just "cabal.project") False
+          tmpUnpack <- lift withGHCupTmpDir
+          cp <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpUnpack) (Just "cabal.project") False
          copyFileE cp (fromGHCupPath workdir </> "cabal.project") False
          pure "cabal.project"
-        Nothing
-          | HackageDist _ <- targetHLS -> do
-              liftIO $ B.writeFile (fromGHCupPath workdir </> "cabal.project") "packages: ./"
-              pure "cabal.project"
-          | RemoteDist _ <- targetHLS -> do
-              let cabalFile = fromGHCupPath workdir </> "cabal.project"
-              liftIO $ whenM (not <$> doesFileExist cabalFile) $ B.writeFile cabalFile "packages: ./"
-              pure "cabal.project"
-          | otherwise -> pure "cabal.project"
+        Nothing -> pure "cabal.project"
      forM_ cabalProjectLocal $ \uri -> do
-        tmpUnpack' <- lift withGHCupTmpDir
-        cpl <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpUnpack') (Just (cp <.> "local")) False
+        tmpUnpack <- lift withGHCupTmpDir
+        cpl <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpUnpack) (Just (cp <.> "local")) False
        copyFileE cpl (fromGHCupPath workdir </> cp <.> "local") False
      artifacts <- forM (sort ghcs) $ \ghc -> do
        let ghcInstallDir = tmpInstallDir </> T.unpack (prettyVer ghc)
@@ -539,7 +464,7 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal upda
        pure ghcInstallDir

      forM_ artifacts $ \artifact -> do
-        logDebug $ T.pack (show artifact)
+        logInfo $ T.pack (show artifact)
        liftIO $ renameFile (artifact </> "haskell-language-server" <.> exeExt)
          (tmpInstallDir </> "haskell-language-server-" <> takeFileName artifact <.> exeExt)
        liftIO $ renameFile (artifact </> "haskell-language-server-wrapper" <.> exeExt)
@@ -554,10 +479,6 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal upda
    )

  pure installVer
- where
-  gitDescribeRequested = case ov of
-                           Left b -> b
-                           _      -> False


    -----------------
@@ -693,11 +614,8 @@ rmHLSVer ver = do
      lift $ recycleFile f
      when (not (null survivors)) $ throwE $ UninstallFailed hlsDir survivors
    Nothing -> do
-      isDir <- liftIO $ doesDirectoryExist hlsDir
-      isSyml <- liftIO $ handleIO (\_ -> pure False) $ pathIsSymbolicLink hlsDir
-      when (isDir && not isSyml) $ do
-        lift $ logInfo $ "Removing legacy directory recursively: " <> T.pack hlsDir
-        recyclePathForcibly hlsDir'
+      lift $ logInfo $ "Removing legacy directory recursively: " <> T.pack hlsDir
+      recyclePathForcibly hlsDir'

  when (Just ver == isHlsSet) $ do
    -- set latest hls
@@ -705,19 +623,3 @@ rmHLSVer ver = do
    case headMay . reverse . sort $ hlsVers of
      Just latestver -> liftE $ setHLS latestver SetHLSOnly Nothing
      Nothing        -> pure ()
-
-
-getCabalVersion :: (MonadIO m, MonadFail m) => FilePath -> m Version
-getCabalVersion fp = do
-  contents <- liftIO $ B.readFile fp
-  gpd <- case parseGenericPackageDescriptionMaybe contents of
-           Nothing -> fail $ "could not parse cabal file: " <> fp
-           Just r -> pure r
-  let tver = (\c -> Version Nothing c [] Nothing)
-           . NE.fromList . fmap (NE.fromList . (:[]) . digits . fromIntegral)
-           . versionNumbers
-           . pkgVersion
-           . package
-           . packageDescription
-           $ gpd
-  pure tver
--- a/lib/GHCup/Prelude/Process/Windows.hs
+++ b/lib/GHCup/Prelude/Process/Windows.hs
@@ -206,36 +206,10 @@ exec :: MonadIO m
     -> Maybe [(String, String)] -- ^ optional environment
     -> m (Either ProcessError ())
 exec exe args chdir env = do
-  -- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/375
-  forM_ (Map.fromList <$> env) $ \cEnv -> do
-    let paths = ["PATH", "Path"]
-        curPaths = (\x -> maybe [] splitSearchPath (Map.lookup x cEnv)) =<< paths
-        newPath = intercalate [searchPathSeparator] curPaths
-    liftIO $ setEnv "PATH" ""
-    liftIO $ setEnv "Path" newPath
  cp <- createProcessWithMingwPath ((proc exe args) { cwd = chdir, env = env })
  exit_code <- liftIO $ withCreateProcess cp $ \_ _ _ p -> waitForProcess p
  pure $ toProcessError exe args exit_code

-- | Like 'exec', except doesn't add msys2 stuff to PATH.
-execNoMinGW :: MonadIO m
-     => FilePath       -- ^ thing to execute
-     -> [FilePath]     -- ^ args for the thing
-     -> Maybe FilePath   -- ^ optionally chdir into this
-     -> Maybe [(String, String)] -- ^ optional environment
-     -> m (Either ProcessError ())
-execNoMinGW exe args chdir env = do
-  -- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/375
-  forM_ (Map.fromList <$> env) $ \cEnv -> do
-    let paths = ["PATH", "Path"]
-        curPaths = (\x -> maybe [] splitSearchPath (Map.lookup x cEnv)) =<< paths
-        newPath = intercalate [searchPathSeparator] curPaths
-    liftIO $ setEnv "PATH" ""
-    liftIO $ setEnv "Path" newPath
-  let cp = (proc exe args) { cwd = chdir, env = env }
-  exit_code <- liftIO $ withCreateProcess cp $ \_ _ _ p -> waitForProcess p
-  pure $ toProcessError exe args exit_code
-

 -- | Thin wrapper around `executeFile`.
 execShell :: MonadIO m
--- a/lib/GHCup/Prompts.hs
+++ b/lib/GHCup/Prompts.hs
@@ -1,28 +0,0 @@
-{-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE FlexibleContexts #-}
-
-module GHCup.Prompts
-  ( PromptQuestion,
-    PromptResponse (..),
-    getUserPromptResponse,
-  )
-where
-
-import Control.Monad.Reader
-import qualified Data.Text.IO as TIO
-import GHCup.Prelude.Logger
-import GHCup.Types.Optics
-import GHCup.Types (PromptQuestion, PromptResponse(..))
-
-getUserPromptResponse :: ( HasLog env
-                         , MonadReader env m
-                         , MonadIO m)
-                      => PromptQuestion
-                      -> m PromptResponse
-
-getUserPromptResponse prompt = do
-  logInfo prompt
-  resp <- liftIO TIO.getLine
-  if resp `elem` ["YES", "yes", "y", "Y"]
-    then pure PromptYes
-    else pure PromptNo
--- a/lib/GHCup/Types.hs
+++ b/lib/GHCup/Types.hs
@@ -407,9 +407,6 @@ data AppState = AppState

 instance NFData AppState

-fromAppState :: AppState -> LeanAppState
-fromAppState AppState {..} = LeanAppState {..}
-
 data LeanAppState = LeanAppState
  { settings :: Settings
  , dirs :: Dirs
@@ -657,7 +654,10 @@ isSafeDir (IsolateDirResolved _) = False
 isSafeDir (GHCupDir _)           = True
 isSafeDir (GHCupBinDir _)        = False

-type PromptQuestion = Text

-data PromptResponse = PromptYes | PromptNo
-  deriving (Show, Eq)
+
+
+
+
+
+
--- a/lib/GHCup/Utils.hs
+++ b/lib/GHCup/Utils.hs
@@ -61,7 +61,6 @@ import           Control.Monad.Reader
 import           Control.Monad.Trans.Resource
                                         hiding ( throwM )
 import           Control.Monad.IO.Unlift        ( MonadUnliftIO( withRunInIO ) )
-import           Data.Char                      ( isHexDigit )
 import           Data.Bifunctor                 ( first )
 import           Data.ByteString                ( ByteString )
 import           Data.Either
@@ -1097,8 +1096,7 @@ runBuildAction bdir action = do

 -- | Clean up the given directory if the action fails,
 -- depending on the Settings.
-cleanUpOnError :: forall e m a env .
-                  ( MonadReader env m
+cleanUpOnError :: ( MonadReader env m
                  , HasDirs env
                  , HasSettings env
                  , MonadIO m
@@ -1277,35 +1275,3 @@ warnAboutHlsCompatibility = do
        T.pack (prettyShow supportedGHC)

    _ -> return ()
-
-
-
-    -----------
-    --[ Git ]--
-    -----------
-
-
-
-isCommitHash :: String -> Bool
-isCommitHash str' = let hex = all isHexDigit str'
-                        len = length str'
-                    in hex && len == 40
-
-
-gitOut :: (MonadReader env m, HasLog env, MonadIO m) => [String] -> FilePath -> Excepts '[ProcessError] m T.Text
-gitOut args dir = do
-  CapturedProcess {..} <- lift $ executeOut "git" args (Just dir)
-  case _exitCode of
-    ExitSuccess   -> pure $ T.pack $ stripNewlineEnd $ T.unpack $ decUTF8Safe' _stdOut
-    ExitFailure c -> do
-      let pe = NonZeroExit c "git" args
-      lift $ logDebug $ T.pack (prettyShow pe)
-      throwE pe
-
-processBranches :: T.Text -> [String]
-processBranches str' = let lines'   = lines (T.unpack str')
-                           words'   = fmap words lines'
-                           refs     = catMaybes $ fmap (`atMay` 1) words'
-                           branches = catMaybes $ fmap (stripPrefix "refs/heads/") $ filter (isPrefixOf "refs/heads/") refs
-                       in branches
-
--- a/scripts/bootstrap/bootstrap-haskell
+++ b/scripts/bootstrap/bootstrap-haskell
@@ -16,7 +16,6 @@
 #   * BOOTSTRAP_HASKELL_INSTALL_HLS - whether to install latest hls
 #   * BOOTSTRAP_HASKELL_ADJUST_BASHRC - whether to adjust PATH in bashrc (prepend)
 #   * BOOTSTRAP_HASKELL_ADJUST_CABAL_CONFIG - whether to adjust mingw paths in cabal.config on windows
-#   * BOOTSTRAP_HASKELL_DOWNLOADER - which downloader to use (default: curl)
 #   * GHCUP_BASE_URL - the base url for ghcup binary download (use this to overwrite https://downloads.haskell.org/~ghcup with a mirror)

 # License: LGPL-3.0
@@ -31,7 +30,6 @@ ghver="0.1.17.8"
 : "${GHCUP_BASE_URL:=https://downloads.haskell.org/~ghcup}"

 export GHCUP_SKIP_UPDATE_CHECK=yes
-: "${BOOTSTRAP_HASKELL_DOWNLOADER:=curl}"

 case "${plat}" in
        MSYS*|MINGW*)
@@ -135,19 +133,6 @@ _eghcup() {
    fi
 }

-ecabal() {
-	edo _ecabal "$@"
-}
-
-_ecabal() {
-    if [ -n "${CABAL_BIN}" ] ; then
-        "${CABAL_BIN}" "$@"
-    else
-        # shellcheck disable=SC2086
-        "${GHCUP_BIN}/cabal" "$@"
-    fi
-}
-
 _done() {
 	echo
 	echo "==============================================================================="
@@ -328,35 +313,11 @@ download_ghcup() {
    esac
    case "${plat}" in
        MSYS*|MINGW*)
-            case "${BOOTSTRAP_HASKELL_DOWNLOADER}" in
-                "curl")
-	                # shellcheck disable=SC2086
-                    edo curl -Lf ${GHCUP_CURL_OPTS} "${_url}" > "${GHCUP_BIN}"/ghcup.exe
-                    ;;
-                "wget")
-	                # shellcheck disable=SC2086
-                    edo wget -O /dev/stdout ${GHCUP_WGET_OPTS} "${_url}" > "${GHCUP_BIN}"/ghcup.exe
-                    ;;
-                *)
-                    die "Unknown downloader: ${BOOTSTRAP_HASKELL_DOWNLOADER}"
-                    ;;
-            esac
+			edo curl -Lf "${_url}" > "${GHCUP_BIN}"/ghcup.exe
 			edo chmod +x "${GHCUP_BIN}"/ghcup.exe
 			;;
 		*)
-            case "${BOOTSTRAP_HASKELL_DOWNLOADER}" in
-                "curl")
-	                # shellcheck disable=SC2086
-                    edo curl -Lf ${GHCUP_CURL_OPTS} "${_url}" > "${GHCUP_BIN}"/ghcup
-                    ;;
-                "wget")
-	                # shellcheck disable=SC2086
-                    edo wget -O /dev/stdout ${GHCUP_WGET_OPTS} "${_url}" > "${GHCUP_BIN}"/ghcup
-                    ;;
-                *)
-                    die "Unknown downloader: ${BOOTSTRAP_HASKELL_DOWNLOADER}"
-                    ;;
-            esac
+			edo curl -Lf "${_url}" > "${GHCUP_BIN}"/ghcup
 			edo chmod +x "${GHCUP_BIN}"/ghcup
 			;;
 	esac
@@ -383,17 +344,6 @@ download_ghcup() {

 	# shellcheck disable=SC1090
    edo . "${GHCUP_DIR}"/env
-    case "${BOOTSTRAP_HASKELL_DOWNLOADER}" in
-        "curl")
-            eghcup config set downloader Curl
-            ;;
-        "wget")
-            eghcup config set downloader Wget
-            ;;
-        *)
-            die "Unknown downloader: ${BOOTSTRAP_HASKELL_DOWNLOADER}"
-            ;;
-    esac
    eghcup upgrade
 }

@@ -587,7 +537,7 @@ adjust_cabal_config() {
    else
        cabal_bin="$HOME/AppData/Roaming/cabal/bin"
    fi
-    ecabal user-config -a "extra-prog-path: $(cygpath -w "$GHCUP_BIN"), $(cygpath -w "$cabal_bin"), $(cygpath -w "$GHCUP_MSYS2"/mingw64/bin), $(cygpath -w "$GHCUP_MSYS2"/usr/bin)" -a "extra-include-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/include)" -a "extra-lib-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/lib)" -f init
+    edo cabal user-config -a "extra-prog-path: $(cygpath -w "$GHCUP_BIN"), $(cygpath -w "$cabal_bin"), $(cygpath -w "$GHCUP_MSYS2"/mingw64/bin), $(cygpath -w "$GHCUP_MSYS2"/usr/bin)" -a "extra-include-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/include)" -a "extra-lib-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/lib)" -f init
 }

 ask_cabal_config_init() {
@@ -738,7 +688,7 @@ find_shell
 echo
 echo "Welcome to Haskell!"
 echo
-echo "This script can download and install the following binaries:"
+echo "This script will download and install the following binaries:"
 echo "  * ghcup - The Haskell toolchain installer"
 echo "  * ghc   - The Glasgow Haskell Compiler"
 echo "  * cabal - The Cabal build tool for managing Haskell software"
@@ -821,7 +771,7 @@ else # don't install ghc and cabal
 				# we'll remove it afterwards
 				tmp_dir="$(mktemp -d)"
 				eghcup --cache install cabal -i "${tmp_dir}" "${BOOTSTRAP_HASKELL_CABAL_VERSION}"
-				CABAL_BIN="${tmp_dir}/cabal" do_cabal_config_init $ask_cabal_config_init_answer
+				PATH="${tmp_dir}:$PATH" do_cabal_config_init $ask_cabal_config_init_answer
 				rm "${tmp_dir}/cabal"
 				unset tmp_dir
 				;;
--- a/scripts/bootstrap/bootstrap-haskell.ps1
+++ b/scripts/bootstrap/bootstrap-haskell.ps1
@@ -36,9 +36,7 @@ param (
    # Instead of installing a new MSys2, use an existing installation
    [string]$ExistingMsys2Dir,
    # Specify the cabal root directory (default: '$InstallDir\cabal')
-    [string]$CabalDir,
-    # Whether to disable use of curl.exe
-    [switch]$DisableCurl
+    [string]$CabalDir
 )

 $Silent = !$Interactive
@@ -244,7 +242,7 @@ if ($Silent -and !($InstallDir)) {
 	Print-Msg -color Magenta -msg (@'
 Welcome to Haskell!

-This script can download and install the following programs:
+This script will download and install the following programs:
  * ghcup - The Haskell toolchain installer
  * ghc   - The Glasgow Haskell Compiler
  * msys2 - A linux-style toolchain environment required for many operations
@@ -427,7 +425,7 @@ if (!(Test-Path -Path ('{0}' -f $MsysDir))) {
    $archive = 'msys2-x86_64-latest.sfx.exe'
    $archivePath = ('{0}\{1}' -f ([IO.Path]::GetTempPath()), "$archive")
    
-    if ((Get-Command -Name 'curl.exe' -ErrorAction SilentlyContinue) -and !($DisableCurl)) {
+    if (Get-Command -Name 'curl.exe' -ErrorAction SilentlyContinue) {
      Exec "curl.exe" '-o' "$archivePath" ('https://repo.msys2.org/distrib/{0}' -f "$archive")
    } else {
      Get-FileWCSynchronous -url ('https://repo.msys2.org/distrib/{0}' -f $archive) -destinationFolder ([IO.Path]::GetTempPath()) -includeStats
@@ -593,17 +591,10 @@ if ($Minimal) {
  $MinimalExport = 'export BOOTSTRAP_HASKELL_MINIMAL=1 ;'
 }

-if ($DisableCurl) {
-  $BootstrapDownloader = 'export BOOTSTRAP_HASKELL_DOWNLOADER=wget ;'
-  $DownloadScript = 'wget -O /dev/stdout'
-} else {
-  $DownloadScript = 'curl --proto ''=https'' --tlsv1.2 -sSf'
-}
-
 if ((Get-Process -ID $PID).ProcessName.StartsWith("bootstrap-haskell") -Or $InBash) {
-  Exec "$Bash" '-lc' ('{4} {6} {7} {8} {9} {10} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; [[ ''{0}'' = https* ]]  && {11} {0} | bash || cat $(cygpath -m ''{0}'') | bash' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport, $BootstrapDownloader, $DownloadScript)
+  Exec "$Bash" '-lc' ('{4} {6} {7} {8} {9} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; [[ ''{0}'' = https* ]]  && curl --proto ''=https'' --tlsv1.2 -sSf {0} | bash || cat $(cygpath -m ''{0}'') | bash' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport)
 } else {
-  Exec "$Msys2Shell" '-mingw64' '-mintty' '-c' ('{4} {6} {7} {8} {9} {10} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; trap ''echo Press any key to exit && read -n 1 && exit'' 2 ; [[ ''{0}'' = https* ]]  && {11} {0} | bash || cat $(cygpath -m ''{0}'') | bash ; echo ''Press any key to exit'' && read -n 1' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport, $BootstrapDownloader, $DownloadScript)
+  Exec "$Msys2Shell" '-mingw64' '-mintty' '-c' ('{4} {6} {7} {8} {9} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; trap ''echo Press any key to exit && read -n 1 && exit'' 2 ; [[ ''{0}'' = https* ]]  && curl --proto ''=https'' --tlsv1.2 -sSf {0} | bash || cat $(cygpath -m ''{0}'') | bash ; echo ''Press any key to exit'' && read -n 1' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport)
 }