ghcup-hs/lib/GHCup/Utils.hs
2020-03-09 00:44:11 +01:00

331 lines
10 KiB
Haskell

{-# LANGUAGE DataKinds #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE TemplateHaskell #-}
module GHCup.Utils
( module GHCup.Utils.Dirs
, module GHCup.Utils
)
where
import GHCup.Errors
import GHCup.Types
import GHCup.Types.JSON ( )
import GHCup.Utils.Dirs
import GHCup.Utils.File
import GHCup.Utils.Prelude
import GHCup.Utils.String.QQ
import Control.Applicative
import Control.Exception.Safe
import Control.Monad
import Control.Monad.Fail ( MonadFail )
import Control.Monad.Logger
import Control.Monad.Reader
import Control.Monad.Trans.Class ( lift )
import Data.Attoparsec.ByteString
import Data.ByteString ( ByteString )
import Data.List
import Data.Maybe
import Data.String.Interpolate
import Data.Versions
import Data.Word8
import GHC.IO.Exception
import HPath
import HPath.IO
import Haskus.Utils.Variant.Excepts
import Optics
import Prelude hiding ( abs
, readFile
, writeFile
)
import Safe
import System.IO.Error
import System.Posix.FilePath ( takeFileName )
import System.Posix.Files.ByteString ( readSymbolicLink )
import URI.ByteString
import qualified Codec.Archive.Tar as Tar
import qualified Codec.Compression.BZip as BZip
import qualified Codec.Compression.GZip as GZip
import qualified Codec.Compression.Lzma as Lzma
import qualified Data.ByteString as B
import qualified Data.Map.Strict as Map
import qualified Data.Text.Encoding as E
------------------------
--[ Symlink handling ]--
------------------------
-- | The symlink destination of a ghc tool.
ghcLinkDestination :: ByteString -- ^ the tool, such as 'ghc', 'haddock' etc.
-> Version
-> ByteString
ghcLinkDestination tool ver = [s|../ghc/|] <> verToBS ver <> [s|/bin/|] <> tool
-- | Extract the version part of the result of `ghcLinkDestination`.
ghcLinkVersion :: MonadThrow m => ByteString -> m Version
ghcLinkVersion = either (throwM . ParseError) pure . parseOnly parser
where
parser = string [s|../ghc/|] *> verParser <* string [s|/bin/ghc|]
verParser = many1' (notWord8 _slash) >>= \t ->
case version $ E.decodeUtf8 $ B.pack t of
Left e -> fail $ show e
Right r -> pure r
-- e.g. ghc-8.6.5
rmMinorSymlinks :: (MonadIO m, MonadLogger m) => Version -> m ()
rmMinorSymlinks ver = do
bindir <- liftIO $ ghcupBinDir
files <- liftIO $ getDirsFiles' bindir
let myfiles =
filter (\x -> ([s|-|] <> verToBS ver) `B.isSuffixOf` toFilePath x) files
forM_ myfiles $ \f -> do
let fullF = (bindir </> f)
$(logDebug) [i|rm -f #{toFilePath fullF}|]
liftIO $ hideError doesNotExistErrorType $ deleteFile fullF
-- E.g. ghc, if this version is the set one.
-- This reads `ghcupGHCDir`.
rmPlain :: (MonadLogger m, MonadThrow m, MonadFail m, MonadIO m)
=> Version
-> Excepts '[NotInstalled] m ()
rmPlain ver = do
files <- liftE $ ghcToolFiles ver
bindir <- liftIO $ ghcupBinDir
forM_ files $ \f -> do
let fullF = (bindir </> f)
lift $ $(logDebug) [i|rm -f #{toFilePath fullF}|]
liftIO $ hideError doesNotExistErrorType $ deleteFile fullF
-- old ghcup
let hdc_file = (bindir </> [rel|haddock-ghc|])
lift $ $(logDebug) [i|rm -f #{toFilePath hdc_file}|]
liftIO $ hideError doesNotExistErrorType $ deleteFile hdc_file
-- e.g. ghc-8.6
rmMajorSymlinks :: (MonadLogger m, MonadIO m) => Version -> m ()
rmMajorSymlinks ver = do
(mj, mi) <- liftIO $ getGHCMajor ver
let v' = E.encodeUtf8 $ intToText mj <> [s|.|] <> intToText mi
bindir <- liftIO ghcupBinDir
files <- liftIO $ getDirsFiles' bindir
let myfiles = filter (\x -> ([s|-|] <> v') `B.isSuffixOf` toFilePath x) files
forM_ myfiles $ \f -> do
let fullF = (bindir </> f)
$(logDebug) [i|rm -f #{toFilePath fullF}|]
liftIO $ hideError doesNotExistErrorType $ deleteFile fullF
-----------------------------------
--[ Set/Installed introspection ]--
-----------------------------------
toolAlreadyInstalled :: Tool -> Version -> IO Bool
toolAlreadyInstalled tool ver = case tool of
GHC -> ghcInstalled ver
Cabal -> cabalInstalled ver
GHCup -> pure True
ghcInstalled :: Version -> IO Bool
ghcInstalled ver = do
ghcdir <- ghcupGHCDir ver
doesDirectoryExist ghcdir
ghcSrcInstalled :: Version -> IO Bool
ghcSrcInstalled ver = do
ghcdir <- ghcupGHCDir ver
doesFileExist (ghcdir </> ghcUpSrcBuiltFile)
ghcSet :: (MonadIO m, MonadThrow m) => m (Maybe Version)
ghcSet = do
ghcBin <- (</> ([rel|ghc|] :: Path Rel)) <$> liftIO ghcupBinDir
-- link destination is of the form ../ghc/<ver>/bin/ghc
liftIO $ handleIO' NoSuchThing (\_ -> pure $ Nothing) $ do
link <- readSymbolicLink $ toFilePath ghcBin
Just <$> ghcLinkVersion link
cabalInstalled :: Version -> IO Bool
cabalInstalled ver = do
reportedVer <- cabalSet
pure (reportedVer == ver)
cabalSet :: (MonadIO m, MonadThrow m) => m Version
cabalSet = do
cabalbin <- (</> ([rel|cabal|] :: Path Rel)) <$> liftIO ghcupBinDir
mc <- liftIO $ executeOut cabalbin [[s|--numeric-version|]] Nothing
let reportedVer = fst . B.spanEnd (== _lf) . _stdOut $ mc
case version (E.decodeUtf8 reportedVer) of
Left e -> throwM e
Right r -> pure r
-----------------------------------------
--[ Major version introspection (X.Y) ]--
-----------------------------------------
-- | We assume GHC is in semver format. I hope it is.
getGHCMajor :: MonadThrow m => Version -> m (Int, Int)
getGHCMajor ver = do
SemVer {..} <- throwEither (semver $ prettyVer ver)
pure (fromIntegral _svMajor, fromIntegral _svMinor)
-- | Get the latest installed full GHC version that satisfies X.Y.
-- This reads `ghcupGHCBaseDir`.
getGHCForMajor :: (MonadIO m, MonadThrow m)
=> Int -- ^ major version component
-> Int -- ^ minor version component
-> m (Maybe Version)
getGHCForMajor major' minor' = do
p <- liftIO $ ghcupGHCBaseDir
ghcs <- liftIO $ getDirsFiles' p
semvers <- forM ghcs $ throwEither . semver . E.decodeUtf8 . toFilePath
mapM (throwEither . version)
. fmap prettySemVer
. lastMay
. sort
. filter
(\SemVer {..} ->
fromIntegral _svMajor == major' && fromIntegral _svMinor == minor'
)
$ semvers
-----------------
--[ Unpacking ]--
-----------------
-- | Unpack an archive to a temporary directory and return that path.
unpackToDir :: (MonadLogger m, MonadIO m, MonadThrow m)
=> Path Abs -- ^ destination dir
-> Path Abs -- ^ archive path
-> Excepts '[UnknownArchive] m ()
unpackToDir dest av = do
let fp = E.decodeUtf8 (toFilePath av)
lift $ $(logInfo) [i|Unpacking: #{fp}|]
fn <- toFilePath <$> basename av
let untar = Tar.unpack (toFilePath dest) . Tar.read
-- extract, depending on file extension
if
| [s|.tar.gz|] `B.isSuffixOf` fn -> liftIO
(untar . GZip.decompress =<< readFile av)
| [s|.tar.xz|] `B.isSuffixOf` fn -> do
filecontents <- liftIO $ readFile av
let decompressed = Lzma.decompress filecontents
liftIO $ untar decompressed
| [s|.tar.bz2|] `B.isSuffixOf` fn -> liftIO
(untar . BZip.decompress =<< readFile av)
| [s|.tar|] `B.isSuffixOf` fn -> liftIO (untar =<< readFile av)
| otherwise -> throwE $ UnknownArchive fn
------------
--[ Tags ]--
------------
-- | Get the tool versions that have this tag.
getTagged :: GHCupDownloads -> Tool -> Tag -> [Version]
getTagged av tool tag = toListOf
( ix tool
% to (Map.filter (\VersionInfo {..} -> elem tag _viTags))
% to Map.keys
% folded
)
av
getLatest :: GHCupDownloads -> Tool -> Maybe Version
getLatest av tool = headOf folded $ getTagged av tool Latest
getRecommended :: GHCupDownloads -> Tool -> Maybe Version
getRecommended av tool = headOf folded $ getTagged av tool Recommended
-----------------------
--[ Settings Getter ]--
-----------------------
getUrlSource :: MonadReader Settings m => m URLSource
getUrlSource = ask <&> urlSource
getCache :: MonadReader Settings m => m Bool
getCache = ask <&> cache
-------------
--[ Other ]--
-------------
urlBaseName :: MonadThrow m
=> ByteString -- ^ the url path (without scheme and host)
-> m (Path Rel)
urlBaseName = parseRel . snd . B.breakEnd (== _slash) . urlDecode False
-- Get tool files from ~/.ghcup/bin/ghc/<ver>/bin/*
-- while ignoring *-<ver> symlinks.
--
-- Returns unversioned relative files, e.g.:
-- ["hsc2hs","haddock","hpc","runhaskell","ghc","ghc-pkg","ghci","runghc","hp2ps"]
ghcToolFiles :: (MonadThrow m, MonadFail m, MonadIO m)
=> Version
-> Excepts '[NotInstalled] m [Path Rel]
ghcToolFiles ver = do
ghcdir <- liftIO $ ghcupGHCDir ver
let bindir = ghcdir </> [rel|bin|]
-- fail if ghc is not installed
whenM (fmap not $ liftIO $ doesDirectoryExist ghcdir)
(throwE (NotInstalled GHC ver))
files <- liftIO $ getDirsFiles' bindir
-- figure out the <ver> suffix, because this might not be `Version` for
-- alpha/rc releases, but x.y.a.somedate.
(Just symver) <-
(B.stripPrefix [s|ghc-|] . takeFileName)
<$> (liftIO $ readSymbolicLink $ toFilePath (bindir </> [rel|ghc|]))
when (B.null symver)
(throwIO $ userError $ "Fatal: ghc symlink target is broken")
pure $ filter (\x -> not $ symver `B.isSuffixOf` toFilePath x) files
-- | This file, when residing in ~/.ghcup/ghc/<ver>/ signals that
-- this GHC was built from source. It contains the build config.
ghcUpSrcBuiltFile :: Path Rel
ghcUpSrcBuiltFile = [rel|.ghcup_src_built|]