{-# LANGUAGE DataKinds #-} {-# LANGUAGE OverloadedStrings #-} {-# LANGUAGE FlexibleContexts #-} {-# LANGUAGE QuasiQuotes #-} {-# LANGUAGE ViewPatterns #-} {-| Module : GHCup.Utils.Dirs Description : Definition of GHCup directories Copyright : (c) Julian Ospald, 2020 License : LGPL-3.0 Maintainer : hasufell@hasufell.de Stability : experimental Portability : POSIX -} module GHCup.Utils.Dirs ( getDirs , ghcupConfigFile , ghcupGHCBaseDir , ghcupGHCDir , mkGhcupTmpDir , parseGHCupGHCDir , relativeSymlink , withGHCupTmpDir ) where import GHCup.Errors import GHCup.Types import GHCup.Types.JSON ( ) import GHCup.Utils.MegaParsec import GHCup.Utils.Prelude import Control.Applicative import Control.Exception.Safe import Control.Monad import Control.Monad.Reader import Control.Monad.Trans.Resource import Data.Bifunctor import Data.ByteString ( ByteString ) import Data.Maybe import GHC.IO.Exception ( IOErrorType(NoSuchThing) ) import Haskus.Utils.Variant.Excepts import HPath import HPath.IO import Optics import Prelude hiding ( abs , readFile , writeFile ) import System.Posix.Env.ByteString ( getEnv , getEnvDefault ) import System.Posix.FilePath hiding ( () ) import System.Posix.Temp.ByteString ( mkdtemp ) import qualified Data.ByteString.Lazy as L import qualified Data.ByteString.UTF8 as UTF8 import qualified Data.Text.Encoding as E import qualified Data.Yaml as Y import qualified System.Posix.FilePath as FP import qualified System.Posix.User as PU import qualified Text.Megaparsec as MP ------------------------------ --[ GHCup base directories ]-- ------------------------------ -- | ~/.ghcup by default -- -- If 'GHCUP_USE_XDG_DIRS' is set (to anything), -- then uses 'XDG_DATA_HOME/ghcup' as per xdg spec. ghcupBaseDir :: IO (Path Abs) ghcupBaseDir = do xdg <- useXDG if xdg then do bdir <- getEnv "XDG_DATA_HOME" >>= \case Just r -> parseAbs r Nothing -> do home <- liftIO getHomeDirectory pure (home [rel|.local/share|]) pure (bdir [rel|ghcup|]) else do bdir <- getEnv "GHCUP_INSTALL_BASE_PREFIX" >>= \case Just r -> parseAbs r Nothing -> liftIO getHomeDirectory pure (bdir [rel|.ghcup|]) -- | ~/.ghcup by default -- -- If 'GHCUP_USE_XDG_DIRS' is set (to anything), -- then uses 'XDG_CONFIG_HOME/ghcup' as per xdg spec. ghcupConfigDir :: IO (Path Abs) ghcupConfigDir = do xdg <- useXDG if xdg then do bdir <- getEnv "XDG_CONFIG_HOME" >>= \case Just r -> parseAbs r Nothing -> do home <- liftIO getHomeDirectory pure (home [rel|.config|]) pure (bdir [rel|ghcup|]) else do bdir <- getEnv "GHCUP_INSTALL_BASE_PREFIX" >>= \case Just r -> parseAbs r Nothing -> liftIO getHomeDirectory pure (bdir [rel|.ghcup|]) -- | If 'GHCUP_USE_XDG_DIRS' is set (to anything), -- then uses 'XDG_BIN_HOME' env var or defaults to '~/.local/bin' -- (which, sadly is not strictly xdg spec). ghcupBinDir :: IO (Path Abs) ghcupBinDir = do xdg <- useXDG if xdg then do getEnv "XDG_BIN_HOME" >>= \case Just r -> parseAbs r Nothing -> do home <- liftIO getHomeDirectory pure (home [rel|.local/bin|]) else ghcupBaseDir <&> ( [rel|bin|]) -- | Defaults to '~/.ghcup/cache'. -- -- If 'GHCUP_USE_XDG_DIRS' is set (to anything), -- then uses 'XDG_CACHE_HOME/ghcup' as per xdg spec. ghcupCacheDir :: IO (Path Abs) ghcupCacheDir = do xdg <- useXDG if xdg then do bdir <- getEnv "XDG_CACHE_HOME" >>= \case Just r -> parseAbs r Nothing -> do home <- liftIO getHomeDirectory pure (home [rel|.cache|]) pure (bdir [rel|ghcup|]) else ghcupBaseDir <&> ( [rel|cache|]) -- | Defaults to '~/.ghcup/logs'. -- -- If 'GHCUP_USE_XDG_DIRS' is set (to anything), -- then uses 'XDG_CACHE_HOME/ghcup/logs' as per xdg spec. ghcupLogsDir :: IO (Path Abs) ghcupLogsDir = do xdg <- useXDG if xdg then do bdir <- getEnv "XDG_CACHE_HOME" >>= \case Just r -> parseAbs r Nothing -> do home <- liftIO getHomeDirectory pure (home [rel|.cache|]) pure (bdir [rel|ghcup/logs|]) else ghcupBaseDir <&> ( [rel|logs|]) getDirs :: IO Dirs getDirs = do baseDir <- ghcupBaseDir binDir <- ghcupBinDir cacheDir <- ghcupCacheDir logsDir <- ghcupLogsDir confDir <- ghcupConfigDir pure Dirs { .. } ------------------- --[ GHCup files ]-- ------------------- ghcupConfigFile :: (MonadIO m) => Excepts '[JSONError] m UserSettings ghcupConfigFile = do confDir <- liftIO ghcupConfigDir let file = confDir [rel|config.yaml|] bs <- liftIO $ handleIO' NoSuchThing (\_ -> pure Nothing) $ Just <$> readFile file case bs of Nothing -> pure defaultUserSettings Just bs' -> lE' JSONDecodeError . bimap show id . Y.decodeEither' . L.toStrict $ bs' ------------------------- --[ GHCup directories ]-- ------------------------- -- | ~/.ghcup/ghc by default. ghcupGHCBaseDir :: (MonadReader AppState m) => m (Path Abs) ghcupGHCBaseDir = do AppState { dirs = Dirs {..} } <- ask pure (baseDir [rel|ghc|]) -- | Gets '~/.ghcup/ghc/'. -- The dir may be of the form -- * armv7-unknown-linux-gnueabihf-8.8.3 -- * 8.8.4 ghcupGHCDir :: (MonadReader AppState m, MonadThrow m) => GHCTargetVersion -> m (Path Abs) ghcupGHCDir ver = do ghcbasedir <- ghcupGHCBaseDir verdir <- parseRel $ E.encodeUtf8 (prettyTVer ver) pure (ghcbasedir verdir) -- | See 'ghcupToolParser'. parseGHCupGHCDir :: MonadThrow m => Path Rel -> m GHCTargetVersion parseGHCupGHCDir (toFilePath -> f) = do fp <- throwEither $ E.decodeUtf8' f throwEither $ MP.parse ghcTargetVerP "" fp mkGhcupTmpDir :: (MonadThrow m, MonadIO m) => m (Path Abs) mkGhcupTmpDir = do tmpdir <- liftIO $ getEnvDefault "TMPDIR" "/tmp" tmp <- liftIO $ mkdtemp $ (tmpdir FP. "ghcup-") parseAbs tmp withGHCupTmpDir :: (MonadResource m, MonadThrow m, MonadIO m) => m (Path Abs) withGHCupTmpDir = snd <$> allocate mkGhcupTmpDir deleteDirRecursive -------------- --[ Others ]-- -------------- getHomeDirectory :: IO (Path Abs) getHomeDirectory = do e <- getEnv "HOME" case e of Just fp -> parseAbs fp Nothing -> do h <- PU.homeDirectory <$> (PU.getEffectiveUserID >>= PU.getUserEntryForID) parseAbs $ UTF8.fromString h -- this is a guess useXDG :: IO Bool useXDG = isJust <$> getEnv "GHCUP_USE_XDG_DIRS" relativeSymlink :: Path Abs -- ^ the path in which to create the symlink -> Path Abs -- ^ the symlink destination -> ByteString relativeSymlink (toFilePath -> p1) (toFilePath -> p2) = let d1 = splitDirectories p1 d2 = splitDirectories p2 common = takeWhile (\(x, y) -> x == y) $ zip d1 d2 cPrefix = drop (length common) d1 in joinPath (replicate (length cPrefix) "..") <> joinPath ("/" : (drop (length common) d2))