241 lines
8.1 KiB
Haskell
241 lines
8.1 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE QuasiQuotes #-}
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{-# LANGUAGE TemplateHaskell #-}
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module GHCup.Utils where
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import GHCup.Errors
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import GHCup.Types
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import GHCup.Types.JSON ( )
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import GHCup.Utils.File
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import GHCup.Utils.Prelude
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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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import Control.Monad.Fail ( MonadFail )
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import Control.Monad.Logger
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import Control.Monad.Reader
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import Control.Monad.Trans.Class ( lift )
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import Data.Attoparsec.ByteString
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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.String.QQ
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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 Safe
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import System.Posix.Env.ByteString ( getEnv )
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import System.Posix.FilePath ( takeFileName )
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import System.Posix.Files.ByteString ( readSymbolicLink )
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import URI.ByteString
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import qualified Codec.Archive.Tar as Tar
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import qualified Codec.Compression.BZip as BZip
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import qualified Codec.Compression.GZip as GZip
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import qualified Codec.Compression.Lzma as Lzma
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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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--[ Utilities ]--
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-----------------
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ghcupBaseDir :: IO (Path Abs)
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ghcupBaseDir = do
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getEnv [s|GHCUP_INSTALL_BASE_PREFIX|] >>= \case
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Just r -> parseAbs r
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Nothing -> do
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home <- liftIO getHomeDirectory
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pure (home </> ([rel|.ghcup|] :: Path Rel))
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ghcupGHCBaseDir :: IO (Path Abs)
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ghcupGHCBaseDir = ghcupBaseDir <&> (</> ([rel|ghc|] :: Path Rel))
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ghcupGHCDir :: Version -> IO (Path Abs)
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ghcupGHCDir ver = do
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ghcbasedir <- ghcupGHCBaseDir
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verdir <- parseRel (verToBS ver)
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pure (ghcbasedir </> verdir)
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-- | The symlink destination of a ghc tool.
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ghcLinkDestination :: ByteString -- ^ the tool, such as 'ghc', 'haddock' etc.
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-> Version
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-> ByteString
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ghcLinkDestination tool ver = [s|../ghc/|] <> verToBS ver <> [s|/bin/|] <> tool
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-- | Extract the version part of the result of `ghcLinkDestination`.
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ghcLinkVersion :: MonadThrow m => ByteString -> m Version
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ghcLinkVersion = either (throwM . ParseError) pure . parseOnly parser
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where
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parser = string [s|../ghc/|] *> verParser <* string [s|/bin/ghc|]
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verParser = many1' (notWord8 _slash) >>= \t ->
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case version $ E.decodeUtf8 $ B.pack t of
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Left e -> fail $ show e
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Right r -> pure r
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ghcInstalled :: Version -> IO Bool
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ghcInstalled ver = do
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ghcdir <- ghcupGHCDir ver
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doesDirectoryExist ghcdir
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ghcSet :: (MonadIO m, MonadThrow m) => m (Maybe Version)
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ghcSet = do
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ghcBin <- (</> ([rel|ghc|] :: Path Rel)) <$> liftIO ghcupBinDir
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-- link destination is of the form ../ghc/<ver>/bin/ghc
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liftIO $ handleIO' NoSuchThing (\_ -> pure $ Nothing) $ do
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link <- readSymbolicLink $ toFilePath ghcBin
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Just <$> ghcLinkVersion link
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ghcupBinDir :: IO (Path Abs)
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ghcupBinDir = ghcupBaseDir <&> (</> ([rel|bin|] :: Path Rel))
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ghcupCacheDir :: IO (Path Abs)
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ghcupCacheDir = ghcupBaseDir <&> (</> ([rel|cache|] :: Path Rel))
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cabalInstalled :: Version -> IO Bool
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cabalInstalled ver = do
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cabalbin <- (</> ([rel|cabal|] :: Path Rel)) <$> ghcupBinDir
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mc <- executeOut cabalbin [[s|--numeric-version|]] Nothing
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let reportedVer = fst . B.spanEnd (== _lf) . _stdOut $ mc
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pure (reportedVer == (verToBS ver))
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cabalSet :: (MonadIO m, MonadThrow m) => m Version
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cabalSet = do
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cabalbin <- (</> ([rel|cabal|] :: Path Rel)) <$> liftIO ghcupBinDir
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mc <- liftIO $ executeOut cabalbin [[s|--numeric-version|]] Nothing
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let reportedVer = fst . B.spanEnd (== _lf) . _stdOut $ mc
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case version (E.decodeUtf8 reportedVer) of
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Left e -> throwM e
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Right r -> pure r
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-- | We assume GHC is in semver format. I hope it is.
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getGHCMajor :: MonadThrow m => Version -> m (Int, Int)
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getGHCMajor ver = do
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SemVer {..} <- throwEither (semver $ prettyVer ver)
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pure (fromIntegral _svMajor, fromIntegral _svMinor)
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-- | Get the latest installed full GHC version that satisfies X.Y.
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-- This reads `ghcupGHCBaseDir`.
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getGHCForMajor :: (MonadIO m, MonadThrow m)
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=> Int -- ^ major version component
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-> Int -- ^ minor version component
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-> m (Maybe Version)
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getGHCForMajor major' minor' = do
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p <- liftIO $ ghcupGHCBaseDir
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ghcs <- liftIO $ getDirsFiles' p
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semvers <- forM ghcs $ throwEither . semver . E.decodeUtf8 . toFilePath
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mapM (throwEither . version)
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. fmap prettySemVer
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. lastMay
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. sort
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. filter
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(\SemVer {..} ->
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fromIntegral _svMajor == major' && fromIntegral _svMinor == minor'
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)
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$ semvers
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urlBaseName :: MonadThrow m
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=> ByteString -- ^ the url path (without scheme and host)
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-> m (Path Rel)
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urlBaseName = parseRel . snd . B.breakEnd (== _slash) . urlDecode False
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-- | Unpack an archive to a temporary directory and return that path.
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unpackToDir :: (MonadLogger m, MonadIO m, MonadThrow m)
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=> Path Abs -- ^ destination dir
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-> Path Abs -- ^ archive path
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-> Excepts '[ArchiveError] m ()
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unpackToDir dest av = do
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let fp = E.decodeUtf8 (toFilePath av)
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lift $ $(logInfo) [i|Unpacking: #{fp}|]
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fn <- toFilePath <$> basename av
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let untar = Tar.unpack (toFilePath dest) . Tar.read
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-- extract, depending on file extension
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if
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| [s|.tar.gz|] `B.isSuffixOf` fn -> liftIO
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(untar . GZip.decompress =<< readFile av)
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| [s|.tar.xz|] `B.isSuffixOf` fn -> do
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filecontents <- liftIO $ readFile av
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let decompressed = Lzma.decompress filecontents
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liftIO $ untar decompressed
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| [s|.tar.bz2|] `B.isSuffixOf` fn -> liftIO
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(untar . BZip.decompress =<< readFile av)
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| [s|.tar|] `B.isSuffixOf` fn -> liftIO (untar =<< readFile av)
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| otherwise -> throwE $ UnknownArchive fn
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-- Get tool files from ~/.ghcup/bin/ghc/<ver>/bin/*
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-- while ignoring *-<ver> symlinks.
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ghcToolFiles :: (MonadThrow m, MonadFail m, MonadIO m)
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=> Version
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-> Excepts '[NotInstalled] m [Path Rel]
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ghcToolFiles ver = do
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ghcdir <- liftIO $ ghcupGHCDir ver
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-- fail if ghc is not installed
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whenM (fmap not $ liftIO $ doesDirectoryExist ghcdir)
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(throwE (NotInstalled $ ToolRequest GHC ver))
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files <- liftIO $ getDirsFiles' (ghcdir </> ([rel|bin|] :: Path Rel))
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-- figure out the <ver> suffix, because this might not be `Version` for
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-- alpha/rc releases, but x.y.a.somedate.
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(Just symver) <-
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(B.stripPrefix [s|ghc-|] . takeFileName)
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<$> (liftIO $ readSymbolicLink $ toFilePath
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(ghcdir </> ([rel|bin/ghc|] :: Path Rel))
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)
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when (B.null symver)
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(throwIO $ userError $ "Fatal: ghc symlink target is broken")
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pure $ filter (\x -> not $ symver `B.isSuffixOf` toFilePath x) files
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-- | Get the tool versions that have this tag.
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getTagged :: BinaryDownloads -> Tool -> Tag -> [Version]
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getTagged av tool tag = toListOf
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( ix tool
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% to (Map.filter (\VersionInfo {..} -> elem tag _viTags))
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% to Map.keys
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% folded
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)
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av
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getLatest :: BinaryDownloads -> Tool -> Maybe Version
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getLatest av tool = headOf folded $ getTagged av tool Latest
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getRecommended :: BinaryDownloads -> Tool -> Maybe Version
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getRecommended av tool = headOf folded $ getTagged av tool Recommended
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getUrlSource :: MonadReader Settings m => m URLSource
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getUrlSource = ask <&> urlSource
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getCache :: MonadReader Settings m => m Bool
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getCache = ask <&> cache
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