724 lines
23 KiB
Haskell
724 lines
23 KiB
Haskell
{-# LANGUAGE CPP #-}
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE QuasiQuotes #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE TypeApplications #-}
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{-# LANGUAGE TypeFamilies #-}
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module GHCup where
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import GHCup.Download
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import GHCup.Errors
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import GHCup.Platform
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import GHCup.Types
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import GHCup.Types.JSON ( )
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import GHCup.Types.Optics
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import GHCup.Utils
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import GHCup.Utils.File
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import GHCup.Utils.Prelude
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import GHCup.Utils.String.QQ
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import GHCup.Utils.Version.QQ
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import GHCup.Version
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import Control.Applicative
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import Control.Exception.Safe
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import Control.Monad
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#if !MIN_VERSION_base(4,13,0)
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import Control.Monad.Fail ( MonadFail )
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#endif
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import Control.Monad.Logger
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import Control.Monad.Reader
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import Control.Monad.Trans.Resource
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hiding ( throwM )
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import Data.ByteString ( ByteString )
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import Data.List
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import Data.Maybe
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import Data.String.Interpolate
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import Data.Versions
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import Data.Word8
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import GHC.IO.Exception
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import HPath
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import HPath.IO
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import Haskus.Utils.Variant.Excepts
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import Optics
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import Prelude hiding ( abs
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, readFile
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, writeFile
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)
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import System.IO.Error
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import System.Posix.FilePath ( getSearchPath )
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import qualified Data.ByteString as B
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import qualified Data.Map.Strict as Map
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import qualified Data.Text.Encoding as E
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-------------------------
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--[ Tool installation ]--
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-------------------------
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installGHCBin :: ( MonadFail m
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, MonadMask m
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, MonadCatch m
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, MonadReader Settings m
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, MonadLogger m
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, MonadResource m
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, MonadIO m
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)
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=> GHCupDownloads
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-> Version
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-> Maybe PlatformRequest -- ^ if Nothing, looks up current host platform
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-> Excepts
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'[ AlreadyInstalled
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, BuildFailed
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, DigestError
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, DistroNotFound
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, DownloadFailed
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, NoCompatibleArch
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, NoCompatiblePlatform
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, NoDownload
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, NotInstalled
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, UnknownArchive
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]
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m
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()
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installGHCBin bDls ver mpfReq = do
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lift $ $(logDebug) [i|Requested to install GHC with #{ver}|]
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whenM (liftIO $ toolAlreadyInstalled GHC ver)
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$ (throwE $ AlreadyInstalled GHC ver)
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Settings {..} <- lift ask
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pfreq@(PlatformRequest {..}) <- maybe (liftE $ platformRequest) pure mpfReq
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-- download (or use cached version)
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dlinfo <- lE $ getDownloadInfo GHC ver pfreq bDls
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dl <- liftE $ downloadCached dlinfo Nothing
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-- unpack
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tmpUnpack <- lift mkGhcupTmpDir
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liftE $ unpackToDir tmpUnpack dl
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void $ liftIO $ darwinNotarization _rPlatform tmpUnpack
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-- prepare paths
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ghcdir <- liftIO $ ghcupGHCDir ver
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-- the subdir of the archive where we do the work
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let workdir = maybe tmpUnpack (tmpUnpack </>) (view dlSubdir dlinfo)
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-- Be careful about cleanup. We must catch both pure exceptions
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-- as well as async ones.
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flip onException
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(liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive ghcdir)
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$ catchAllE
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(\es -> do
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liftIO (hideError doesNotExistErrorType $ deleteDirRecursive ghcdir)
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>> throwE (BuildFailed workdir es)
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)
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$ installGHC' workdir ghcdir
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-- only clean up dir if the build succeeded
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liftIO $ deleteDirRecursive tmpUnpack
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liftE $ postGHCInstall ver
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where
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-- | Install an unpacked GHC distribution. This only deals with the GHC build system and nothing else.
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installGHC' :: (MonadLogger m, MonadIO m)
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=> Path Abs -- ^ Path to the unpacked GHC bindist (where the configure script resides)
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-> Path Abs -- ^ Path to install to
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-> Excepts '[ProcessError] m ()
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installGHC' path inst = do
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lift $ $(logInfo) "Installing GHC (this may take a while)"
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lEM $ liftIO $ execLogged "./configure"
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False
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["--prefix=" <> toFilePath inst]
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[rel|ghc-configure|]
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(Just path)
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Nothing
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lEM $ liftIO $ make ["install"] (Just path)
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pure ()
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installCabalBin :: ( MonadMask m
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, MonadCatch m
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, MonadReader Settings m
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, MonadLogger m
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, MonadResource m
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, MonadIO m
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)
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=> GHCupDownloads
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-> Version
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-> Maybe PlatformRequest -- ^ if Nothing, looks up current host platform
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-> Excepts
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'[ CopyError
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, DigestError
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, DistroNotFound
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, DownloadFailed
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, NoCompatibleArch
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, NoCompatiblePlatform
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, NoDownload
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, UnknownArchive
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]
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m
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()
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installCabalBin bDls ver mpfReq = do
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lift $ $(logDebug) [i|Requested to install cabal version #{ver}|]
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Settings {..} <- lift ask
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pfreq@(PlatformRequest {..}) <- maybe (liftE $ platformRequest) pure mpfReq
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-- download (or use cached version)
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dlinfo <- lE $ getDownloadInfo Cabal ver pfreq bDls
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dl <- liftE $ downloadCached dlinfo Nothing
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-- unpack
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tmpUnpack <- lift withGHCupTmpDir
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liftE $ unpackToDir tmpUnpack dl
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void $ liftIO $ darwinNotarization _rPlatform tmpUnpack
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-- prepare paths
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bindir <- liftIO ghcupBinDir
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-- the subdir of the archive where we do the work
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let workdir = maybe tmpUnpack (tmpUnpack </>) (view dlSubdir dlinfo)
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liftE $ installCabal' workdir bindir
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pure ()
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where
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-- | Install an unpacked cabal distribution.
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installCabal' :: (MonadLogger m, MonadCatch m, MonadIO m)
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=> Path Abs -- ^ Path to the unpacked cabal bindist (where the executable resides)
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-> Path Abs -- ^ Path to install to
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-> Excepts '[CopyError] m ()
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installCabal' path inst = do
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lift $ $(logInfo) "Installing cabal"
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let cabalFile = [rel|cabal|]
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liftIO $ createDirIfMissing newDirPerms inst
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handleIO (throwE . CopyError . show) $ liftIO $ copyFile
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(path </> cabalFile)
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(inst </> cabalFile)
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Overwrite
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---------------
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--[ Set GHC ]--
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---------------
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-- | Set GHC symlinks in ~/.ghcup/bin for the requested GHC version. The behavior depends
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-- on `SetGHC`:
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--
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-- * SetGHCOnly: ~/.ghcup/bin/ghc -> ~/.ghcup/ghc/<ver>/bin/ghc
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-- * SetGHC_XY: ~/.ghcup/bin/ghc-X.Y -> ~/.ghcup/ghc/<ver>/bin/ghc
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-- * SetGHC_XYZ: ~/.ghcup/bin/ghc-<ver> -> ~/.ghcup/ghc/<ver>/bin/ghc
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--
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-- Additionally creates a ~/.ghcup/share -> ~/.ghcup/ghc/<ver>/share symlink
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-- for `SetGHCOnly` constructor.
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setGHC :: (MonadLogger m, MonadThrow m, MonadFail m, MonadIO m)
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=> Version
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-> SetGHC
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-> Excepts '[NotInstalled] m ()
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setGHC ver sghc = do
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let verBS = verToBS ver
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ghcdir <- liftIO $ ghcupGHCDir ver
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-- symlink destination
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bindir <- liftIO $ ghcupBinDir
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liftIO $ hideError AlreadyExists $ createDirRecursive newDirPerms bindir
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-- first delete the old symlinks (this fixes compatibility issues
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-- with old ghcup)
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case sghc of
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SetGHCOnly -> liftE $ rmPlain ver
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SetGHC_XY -> lift $ rmMajorSymlinks ver
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SetGHC_XYZ -> lift $ rmMinorSymlinks ver
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-- for ghc tools (ghc, ghci, haddock, ...)
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verfiles <- ghcToolFiles ver
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forM_ verfiles $ \file -> do
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liftIO $ hideError doesNotExistErrorType $ deleteFile (bindir </> file)
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targetFile <- case sghc of
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SetGHCOnly -> pure file
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SetGHC_XY -> do
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major' <-
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(\(mj, mi) -> E.encodeUtf8 $ intToText mj <> "." <> intToText mi)
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<$> getGHCMajor ver
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parseRel (toFilePath file <> B.singleton _hyphen <> major')
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SetGHC_XYZ -> parseRel (toFilePath file <> B.singleton _hyphen <> verBS)
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-- create symlink
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let fullF = bindir </> targetFile
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let destL = ghcLinkDestination (toFilePath file) ver
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lift $ $(logDebug) [i|ln -s #{destL} #{toFilePath fullF}|]
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liftIO $ createSymlink fullF destL
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-- create symlink for share dir
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lift $ symlinkShareDir ghcdir verBS
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pure ()
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where
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symlinkShareDir :: (MonadIO m, MonadLogger m)
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=> Path Abs
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-> ByteString
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-> m ()
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symlinkShareDir ghcdir verBS = do
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destdir <- liftIO $ ghcupBaseDir
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case sghc of
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SetGHCOnly -> do
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let sharedir = [rel|share|]
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let fullsharedir = ghcdir </> sharedir
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whenM (liftIO $ doesDirectoryExist fullsharedir) $ do
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let fullF = destdir </> sharedir
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let targetF = "./ghc/" <> verBS <> "/" <> toFilePath sharedir
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$(logDebug) [i|rm -f #{fullF}|]
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liftIO $ hideError doesNotExistErrorType $ deleteFile fullF
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$(logDebug) [i|ln -s #{targetF} #{fullF}|]
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liftIO $ createSymlink fullF targetF
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_ -> pure ()
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------------------
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--[ List tools ]--
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------------------
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data ListCriteria = ListInstalled
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| ListSet
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deriving Show
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data ListResult = ListResult
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{ lTool :: Tool
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, lVer :: Version
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, lTag :: [Tag]
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, lInstalled :: Bool
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, lSet :: Bool
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, fromSrc :: Bool
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}
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deriving Show
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availableToolVersions :: GHCupDownloads -> Tool -> [(Version, [Tag])]
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availableToolVersions av tool = toListOf
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(ix tool % to (fmap (\(v, vi) -> (v, (_viTags vi))) . Map.toList) % folded)
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av
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listVersions :: GHCupDownloads
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-> Maybe Tool
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-> Maybe ListCriteria
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-> IO [ListResult]
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listVersions av lt criteria = case lt of
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Just t -> do
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filter' <$> forM (availableToolVersions av t) (toListResult t)
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Nothing -> do
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ghcvers <- listVersions av (Just GHC) criteria
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cabalvers <- listVersions av (Just Cabal) criteria
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ghcupvers <- listVersions av (Just GHCup) criteria
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pure (ghcvers <> cabalvers <> ghcupvers)
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where
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toListResult :: Tool -> (Version, [Tag]) -> IO ListResult
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toListResult t (v, tags) = case t of
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GHC -> do
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lSet <- fmap (maybe False (== v)) $ ghcSet
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lInstalled <- ghcInstalled v
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fromSrc <- ghcSrcInstalled v
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pure ListResult { lVer = v, lTag = tags, lTool = t, .. }
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Cabal -> do
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lSet <- fmap (== v) $ cabalSet
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let lInstalled = lSet
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pure ListResult { lVer = v, lTag = tags, lTool = t, fromSrc = False, .. }
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GHCup -> do
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let lSet = prettyPVP ghcUpVer == prettyVer v
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let lInstalled = lSet
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pure ListResult { lVer = v, lTag = tags, lTool = t, fromSrc = False, .. }
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filter' :: [ListResult] -> [ListResult]
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filter' lr = case criteria of
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Nothing -> lr
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Just ListInstalled -> filter (\ListResult {..} -> lInstalled) lr
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Just ListSet -> filter (\ListResult {..} -> lSet) lr
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--------------
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--[ GHC rm ]--
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--------------
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-- | This function may throw and crash in various ways.
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rmGHCVer :: (MonadThrow m, MonadLogger m, MonadIO m, MonadFail m)
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=> Version
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-> Excepts '[NotInstalled] m ()
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rmGHCVer ver = do
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isSetGHC <- fmap (maybe False (== ver)) $ ghcSet
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dir <- liftIO $ ghcupGHCDir ver
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let d' = toFilePath dir
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exists <- liftIO $ doesDirectoryExist dir
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if exists
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then do
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-- this isn't atomic, order matters
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lift $ $(logInfo) [i|Removing directory recursively: #{d'}|]
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liftIO $ deleteDirRecursive dir
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lift $ $(logInfo) [i|Removing ghc-x.y.z symlinks|]
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lift $ rmMinorSymlinks ver
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lift $ $(logInfo) [i|Removing/rewiring ghc-x.y symlinks|]
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-- first remove
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lift $ rmMajorSymlinks ver
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-- then fix them (e.g. with an earlier version)
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(mj, mi) <- getGHCMajor ver
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getGHCForMajor mj mi >>= mapM_ (\v -> liftE $ setGHC v SetGHC_XY)
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when isSetGHC $ do
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lift $ $(logInfo) [i|Removing ghc symlinks|]
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liftE $ rmPlain ver
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liftIO
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$ ghcupBaseDir
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>>= hideError doesNotExistErrorType
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. deleteFile
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. (</> [rel|share|])
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else throwE (NotInstalled GHC ver)
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------------------
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--[ Debug info ]--
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------------------
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getDebugInfo :: (MonadLogger m, MonadCatch m, MonadIO m)
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=> Excepts
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'[NoCompatiblePlatform , NoCompatibleArch , DistroNotFound]
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m
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DebugInfo
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getDebugInfo = do
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diBaseDir <- liftIO $ ghcupBaseDir
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diBinDir <- liftIO $ ghcupBinDir
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diGHCDir <- liftIO $ ghcupGHCBaseDir
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diCacheDir <- liftIO $ ghcupCacheDir
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diArch <- lE getArchitecture
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diPlatform <- liftE $ getPlatform
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pure $ DebugInfo { .. }
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---------------
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--[ Compile ]--
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---------------
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compileGHC :: ( MonadMask m
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, MonadReader Settings m
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, MonadThrow m
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, MonadResource m
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, MonadLogger m
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, MonadIO m
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, MonadFail m
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)
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=> GHCupDownloads
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-> Version -- ^ version to install
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-> Either Version (Path Abs) -- ^ version to bootstrap with
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-> Maybe Int -- ^ jobs
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-> Maybe (Path Abs) -- ^ build config
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-> Maybe (Path Abs)
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-> Excepts
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'[ AlreadyInstalled
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, BuildFailed
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, DigestError
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|
, DistroNotFound
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, DownloadFailed
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, GHCupSetError
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, NoCompatibleArch
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, NoCompatiblePlatform
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, NoDownload
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, PatchFailed
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, UnknownArchive
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]
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m
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()
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compileGHC dls tver bstrap jobs mbuildConfig patchdir = do
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lift $ $(logDebug) [i|Requested to compile: #{tver} with #{bstrap}|]
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whenM (liftIO $ toolAlreadyInstalled GHC tver)
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(throwE $ AlreadyInstalled GHC tver)
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-- download source tarball
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dlInfo <- preview (ix GHC % ix tver % viSourceDL % _Just) dls ?? NoDownload
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dl <- liftE $ downloadCached dlInfo Nothing
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|
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-- unpack
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tmpUnpack <- lift mkGhcupTmpDir
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liftE $ unpackToDir tmpUnpack dl
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(PlatformRequest {..}) <- liftE $ platformRequest
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void $ liftIO $ darwinNotarization _rPlatform tmpUnpack
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bghc <- case bstrap of
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Right g -> pure $ Right g
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Left bver -> Left <$> parseRel ("ghc-" <> verToBS bver)
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let workdir = maybe id (flip (</>)) (view dlSubdir dlInfo) $ tmpUnpack
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ghcdir <- liftIO $ ghcupGHCDir tver
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|
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-- Be careful about cleanup. We must catch both pure exceptions
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-- as well as async ones.
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flip onException
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(liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive ghcdir)
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$ catchAllE
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(\es ->
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liftIO (hideError doesNotExistErrorType $ deleteDirRecursive ghcdir)
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>> throwE (BuildFailed workdir es)
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)
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$ compile bghc ghcdir workdir
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markSrcBuilt ghcdir workdir
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|
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-- only clean up dir if the build succeeded
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liftIO $ deleteDirRecursive tmpUnpack
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reThrowAll GHCupSetError $ postGHCInstall tver
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pure ()
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where
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defaultConf = [s|
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V=0
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BUILD_MAN = NO
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BUILD_SPHINX_HTML = NO
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BUILD_SPHINX_PDF = NO
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HADDOCK_DOCS = YES
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GhcWithLlvmCodeGen = YES|]
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|
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compile :: (MonadCatch m, MonadLogger m, MonadIO m)
|
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=> Either (Path Rel) (Path Abs)
|
|
-> Path Abs
|
|
-> Path Abs
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|
-> Excepts
|
|
'[ NoDownload
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, FileDoesNotExistError
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, PatchFailed
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, ProcessError
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]
|
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m
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()
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compile bghc ghcdir workdir = do
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lift $ $(logInfo) [i|configuring build|]
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|
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forM_ patchdir $ \dir -> liftE $ applyPatches dir workdir
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|
|
-- force ld.bfd for build (others seem to misbehave, like lld from FreeBSD)
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|
newEnv <- addToCurrentEnv [("LD", "ld.bfd")]
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|
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if
|
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| tver >= [vver|8.8.0|] -> do
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bghcPath <- case bghc of
|
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Right ghc' -> pure ghc'
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Left bver -> do
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spaths <- catMaybes . fmap parseAbs <$> liftIO getSearchPath
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|
(liftIO $ searchPath spaths bver) !? NoDownload
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|
lEM $ liftIO $ execLogged
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|
"./configure"
|
|
False
|
|
["--prefix=" <> toFilePath ghcdir]
|
|
[rel|ghc-conf|]
|
|
(Just workdir)
|
|
(Just (("GHC", toFilePath bghcPath) : newEnv))
|
|
| otherwise -> do
|
|
lEM $ liftIO $ execLogged
|
|
"./configure"
|
|
False
|
|
[ "--prefix=" <> toFilePath ghcdir
|
|
, "--with-ghc=" <> either toFilePath toFilePath bghc
|
|
]
|
|
[rel|ghc-conf|]
|
|
(Just workdir)
|
|
(Just newEnv)
|
|
|
|
case mbuildConfig of
|
|
Just bc -> liftIOException
|
|
doesNotExistErrorType
|
|
(FileDoesNotExistError $ toFilePath bc)
|
|
(liftIO $ copyFile bc (build_mk workdir) Overwrite)
|
|
Nothing ->
|
|
liftIO $ writeFile (build_mk workdir) (Just newFilePerms) defaultConf
|
|
|
|
lift $ $(logInfo) [i|Building (this may take a while)...|]
|
|
lEM $ liftIO $ make (maybe [] (\j -> ["-j" <> fS (show j)]) jobs)
|
|
(Just workdir)
|
|
|
|
lift $ $(logInfo) [i|Installing...|]
|
|
lEM $ liftIO $ make ["install"] (Just workdir)
|
|
|
|
markSrcBuilt ghcdir workdir = do
|
|
let dest = (ghcdir </> ghcUpSrcBuiltFile)
|
|
liftIO $ copyFile (build_mk workdir) dest Overwrite
|
|
|
|
build_mk workdir = workdir </> [rel|mk/build.mk|]
|
|
|
|
|
|
compileCabal :: ( MonadReader Settings m
|
|
, MonadResource m
|
|
, MonadMask m
|
|
, MonadLogger m
|
|
, MonadIO m
|
|
)
|
|
=> GHCupDownloads
|
|
-> Version -- ^ version to install
|
|
-> Either Version (Path Abs) -- ^ version to bootstrap with
|
|
-> Maybe Int
|
|
-> Maybe (Path Abs)
|
|
-> Excepts
|
|
'[ BuildFailed
|
|
, DigestError
|
|
, DistroNotFound
|
|
, DownloadFailed
|
|
, NoCompatibleArch
|
|
, NoCompatiblePlatform
|
|
, NoDownload
|
|
, PatchFailed
|
|
, UnknownArchive
|
|
]
|
|
m
|
|
()
|
|
compileCabal dls tver bghc jobs patchdir = do
|
|
lift $ $(logDebug) [i|Requested to compile: #{tver} with ghc-#{bghc}|]
|
|
|
|
-- download source tarball
|
|
dlInfo <- preview (ix Cabal % ix tver % viSourceDL % _Just) dls ?? NoDownload
|
|
dl <- liftE $ downloadCached dlInfo Nothing
|
|
|
|
-- unpack
|
|
tmpUnpack <- lift mkGhcupTmpDir
|
|
liftE $ unpackToDir tmpUnpack dl
|
|
(PlatformRequest {..}) <- liftE $ platformRequest
|
|
void $ liftIO $ darwinNotarization _rPlatform tmpUnpack
|
|
|
|
let workdir = maybe id (flip (</>)) (view dlSubdir dlInfo) $ tmpUnpack
|
|
|
|
reThrowAll (BuildFailed workdir) $ compile workdir
|
|
|
|
-- only clean up dir if the build succeeded
|
|
liftIO $ deleteDirRecursive tmpUnpack
|
|
|
|
pure ()
|
|
|
|
where
|
|
compile :: (MonadThrow m, MonadLogger m, MonadIO m)
|
|
=> Path Abs
|
|
-> Excepts '[ProcessError , PatchFailed] m ()
|
|
compile workdir = do
|
|
lift $ $(logInfo) [i|Building (this may take a while)...|]
|
|
|
|
forM_ patchdir $ \dir -> liftE $ applyPatches dir workdir
|
|
|
|
ghcEnv <- case bghc of
|
|
Right path -> do
|
|
-- recover the version from /foo/ghc-6.5.4
|
|
bn <- basename path
|
|
let dn = toFilePath $ dirname path
|
|
let ver = snd . B.break (== _hyphen) . toFilePath $ bn
|
|
|
|
pure
|
|
[ ("GHC" , toFilePath path)
|
|
, ("GHC_PKG", dn <> "/" <> "ghc-pkg" <> ver)
|
|
]
|
|
Left bver -> do
|
|
let v' = verToBS bver
|
|
pure [("GHC", "ghc-" <> v'), ("GHC_PKG", "ghc-pkg-" <> v')]
|
|
|
|
cabal_bin <- liftIO $ ghcupBinDir
|
|
newEnv <- lift
|
|
$ addToCurrentEnv (("PREFIX", toFilePath cabal_bin) : ghcEnv)
|
|
lift $ $(logDebug) [i|Environment: #{newEnv}|]
|
|
|
|
lEM $ liftIO $ execLogged "./bootstrap.sh"
|
|
False
|
|
(maybe [] (\j -> ["-j", fS (show j)]) jobs)
|
|
[rel|cabal-bootstrap|]
|
|
(Just workdir)
|
|
(Just newEnv)
|
|
|
|
|
|
|
|
|
|
---------------------
|
|
--[ Upgrade GHCup ]--
|
|
---------------------
|
|
|
|
|
|
upgradeGHCup :: ( MonadMask m
|
|
, MonadReader Settings m
|
|
, MonadCatch m
|
|
, MonadLogger m
|
|
, MonadThrow m
|
|
, MonadResource m
|
|
, MonadIO m
|
|
)
|
|
=> GHCupDownloads
|
|
-> Maybe (Path Abs) -- ^ full file destination to write ghcup into
|
|
-> Excepts
|
|
'[ CopyError
|
|
, DigestError
|
|
, DistroNotFound
|
|
, DownloadFailed
|
|
, NoCompatibleArch
|
|
, NoCompatiblePlatform
|
|
, NoDownload
|
|
]
|
|
m
|
|
Version
|
|
upgradeGHCup dls mtarget = do
|
|
lift $ $(logInfo) [i|Upgrading GHCup...|]
|
|
let latestVer = fromJust $ getLatest dls GHCup
|
|
pfreq <- liftE platformRequest
|
|
dli <- lE $ getDownloadInfo GHCup latestVer pfreq dls
|
|
tmp <- lift withGHCupTmpDir
|
|
let fn = [rel|ghcup|]
|
|
p <- liftE $ download dli tmp (Just fn)
|
|
case mtarget of
|
|
Nothing -> do
|
|
dest <- liftIO $ ghcupBinDir
|
|
handleIO (throwE . CopyError . show) $ liftIO $ copyFile p
|
|
(dest </> fn)
|
|
Overwrite
|
|
Just fullDest -> liftIO $ copyFile p fullDest Overwrite
|
|
pure latestVer
|
|
|
|
|
|
|
|
-------------
|
|
--[ Other ]--
|
|
-------------
|
|
|
|
|
|
-- | Creates ghc-x.y.z and ghc-x.y symlinks. This is used for
|
|
-- both installing from source and bindist.
|
|
postGHCInstall :: (MonadLogger m, MonadThrow m, MonadFail m, MonadIO m)
|
|
=> Version
|
|
-> Excepts '[NotInstalled] m ()
|
|
postGHCInstall ver = do
|
|
liftE $ setGHC ver SetGHC_XYZ
|
|
|
|
-- Create ghc-x.y symlinks. This may not be the current
|
|
-- version, create it regardless.
|
|
(mj, mi) <- liftIO $ getGHCMajor ver
|
|
getGHCForMajor mj mi >>= mapM_ (\v -> liftE $ setGHC v SetGHC_XY)
|