2020-02-22 18:21:10 +00:00
|
|
|
{-# LANGUAGE QuasiQuotes #-}
|
2020-01-17 22:29:16 +00:00
|
|
|
{-# LANGUAGE TemplateHaskell #-}
|
|
|
|
|
2020-03-03 00:59:19 +00:00
|
|
|
module GHCup.Utils.File where
|
|
|
|
|
2020-03-05 17:02:59 +00:00
|
|
|
import GHCup.Utils.Dirs
|
2020-03-03 00:59:19 +00:00
|
|
|
import GHCup.Utils.Prelude
|
2020-01-14 21:55:34 +00:00
|
|
|
|
2020-03-01 00:05:02 +00:00
|
|
|
import Control.Exception.Safe
|
|
|
|
import Control.Monad
|
2020-01-16 22:27:38 +00:00
|
|
|
import Data.ByteString
|
2020-03-01 00:05:02 +00:00
|
|
|
import Data.ByteString.Unsafe ( unsafeUseAsCStringLen )
|
2020-01-14 21:55:34 +00:00
|
|
|
import Data.Char
|
2020-03-01 00:05:02 +00:00
|
|
|
import Data.Foldable
|
|
|
|
import Data.Functor
|
2020-01-14 21:55:34 +00:00
|
|
|
import Data.Maybe
|
2020-03-01 00:05:02 +00:00
|
|
|
import GHC.Foreign ( peekCStringLen )
|
|
|
|
import GHC.IO.Encoding ( getLocaleEncoding )
|
2020-03-03 00:59:19 +00:00
|
|
|
import GHC.IO.Exception
|
2020-01-14 21:55:34 +00:00
|
|
|
import HPath
|
|
|
|
import HPath.IO
|
2020-01-17 22:29:16 +00:00
|
|
|
import Optics
|
2020-03-01 00:05:02 +00:00
|
|
|
import Streamly
|
2020-02-18 08:40:01 +00:00
|
|
|
import Streamly.External.ByteString
|
|
|
|
import Streamly.External.ByteString.Lazy
|
2020-03-01 00:05:02 +00:00
|
|
|
import System.IO
|
|
|
|
import System.Posix.Directory.ByteString
|
|
|
|
import System.Posix.FD as FD
|
2020-01-14 21:55:34 +00:00
|
|
|
import System.Posix.FilePath hiding ( (</>) )
|
2020-02-16 21:06:07 +00:00
|
|
|
import System.Posix.Foreign ( oExcl )
|
2020-01-17 22:29:16 +00:00
|
|
|
import "unix" System.Posix.IO.ByteString
|
2020-01-16 22:27:38 +00:00
|
|
|
hiding ( openFd )
|
2020-02-19 12:30:18 +00:00
|
|
|
import System.Posix.Process ( ProcessStatus(..) )
|
2020-01-14 21:55:34 +00:00
|
|
|
import System.Posix.Types
|
|
|
|
|
2020-03-01 00:05:02 +00:00
|
|
|
|
|
|
|
import qualified System.Posix.Process.ByteString
|
|
|
|
as SPPB
|
2020-03-03 00:59:19 +00:00
|
|
|
import Streamly.External.Posix.DirStream
|
2020-01-14 21:55:34 +00:00
|
|
|
import qualified Streamly.Internal.Memory.ArrayStream
|
|
|
|
as AS
|
|
|
|
import qualified Streamly.FileSystem.Handle as FH
|
|
|
|
import qualified Streamly.Internal.Data.Unfold as SU
|
|
|
|
import qualified Streamly.Prelude as S
|
2020-03-01 00:05:02 +00:00
|
|
|
import qualified Data.ByteString.Lazy as L
|
2020-01-17 22:29:16 +00:00
|
|
|
|
2020-02-22 18:21:10 +00:00
|
|
|
|
|
|
|
data ProcessError = NonZeroExit Int ByteString [ByteString]
|
|
|
|
| PTerminated ByteString [ByteString]
|
|
|
|
| PStopped ByteString [ByteString]
|
|
|
|
| NoSuchPid ByteString [ByteString]
|
2020-02-19 12:30:18 +00:00
|
|
|
deriving Show
|
|
|
|
|
|
|
|
|
2020-02-29 23:07:39 +00:00
|
|
|
data CapturedProcess = CapturedProcess
|
|
|
|
{ _exitCode :: ExitCode
|
2020-02-19 12:30:18 +00:00
|
|
|
, _stdOut :: ByteString
|
|
|
|
, _stdErr :: ByteString
|
2020-02-29 23:07:39 +00:00
|
|
|
}
|
|
|
|
deriving (Eq, Show)
|
2020-01-17 22:29:16 +00:00
|
|
|
|
|
|
|
makeLenses ''CapturedProcess
|
2020-01-14 21:55:34 +00:00
|
|
|
|
|
|
|
|
|
|
|
readFd :: Fd -> IO L.ByteString
|
|
|
|
readFd fd = do
|
|
|
|
handle' <- fdToHandle fd
|
2020-02-18 08:40:01 +00:00
|
|
|
fromChunksIO $ (S.unfold (SU.finallyIO hClose FH.readChunks) handle')
|
2020-01-14 21:55:34 +00:00
|
|
|
|
|
|
|
|
|
|
|
-- | Read the lines of a file into a stream. The stream holds
|
|
|
|
-- a file handle as a resource and will close it once the stream
|
|
|
|
-- terminates (either through exception or because it's drained).
|
|
|
|
readFileLines :: Path b -> IO (SerialT IO ByteString)
|
|
|
|
readFileLines p = do
|
2020-01-16 22:27:38 +00:00
|
|
|
stream <- readFileStream p
|
2020-01-14 21:55:34 +00:00
|
|
|
pure
|
2020-02-18 08:40:01 +00:00
|
|
|
. (fmap fromArray)
|
2020-01-14 21:55:34 +00:00
|
|
|
. AS.splitOn (fromIntegral $ ord '\n')
|
2020-02-18 08:40:01 +00:00
|
|
|
. (fmap toArray)
|
2020-01-14 21:55:34 +00:00
|
|
|
$ stream
|
|
|
|
|
|
|
|
|
|
|
|
-- | Find the given executable by searching all *absolute* PATH components.
|
|
|
|
-- Relative paths in PATH are ignored.
|
|
|
|
--
|
|
|
|
-- This shouldn't throw IO exceptions, unless getting the environment variable
|
|
|
|
-- PATH does.
|
2020-01-24 22:43:11 +00:00
|
|
|
findExecutable :: Path Rel -> IO (Maybe (Path Abs))
|
2020-01-14 21:55:34 +00:00
|
|
|
findExecutable ex = do
|
|
|
|
sPaths <- fmap catMaybes . (fmap . fmap) parseAbs $ getSearchPath
|
|
|
|
-- We don't want exceptions to mess up our result. If we can't
|
|
|
|
-- figure out if a file exists, then treat it as a negative result.
|
2020-01-16 22:27:38 +00:00
|
|
|
asum $ fmap (handleIO (\_ -> pure Nothing)) $ fmap
|
2020-01-14 21:55:34 +00:00
|
|
|
-- asum for short-circuiting behavior
|
2020-02-29 23:07:39 +00:00
|
|
|
(\s' -> (isExecutable (s' </> ex) >>= guard) $> (Just (s' </> ex)))
|
2020-01-14 21:55:34 +00:00
|
|
|
sPaths
|
|
|
|
|
|
|
|
|
2020-01-17 22:29:16 +00:00
|
|
|
-- | Execute the given command and collect the stdout, stderr and the exit code.
|
|
|
|
-- The command is run in a subprocess.
|
2020-02-24 13:56:13 +00:00
|
|
|
executeOut :: Path b -- ^ command as filename, e.g. 'ls'
|
2020-02-18 08:40:01 +00:00
|
|
|
-> [ByteString] -- ^ arguments to the command
|
|
|
|
-> Maybe (Path Abs) -- ^ chdir to this path
|
2020-02-24 13:56:13 +00:00
|
|
|
-> IO CapturedProcess
|
2020-02-29 23:07:39 +00:00
|
|
|
executeOut path args chdir = captureOutStreams $ do
|
|
|
|
maybe (pure ()) (changeWorkingDirectory . toFilePath) chdir
|
|
|
|
SPPB.executeFile (toFilePath path) True args Nothing
|
2020-01-17 22:29:16 +00:00
|
|
|
|
|
|
|
|
2020-03-05 17:02:59 +00:00
|
|
|
execLogged :: ByteString -- ^ thing to execute
|
|
|
|
-> Bool -- ^ whether to search PATH for the thing
|
|
|
|
-> [ByteString] -- ^ args for the thing
|
|
|
|
-> Path Rel -- ^ log filename
|
|
|
|
-> Maybe (Path Abs) -- ^ optionally chdir into this
|
|
|
|
-> Maybe [(ByteString, ByteString)] -- ^ optional environment
|
|
|
|
-> IO (Either ProcessError ())
|
|
|
|
execLogged exe spath args lfile chdir env = do
|
|
|
|
ldir <- ghcupLogsDir
|
|
|
|
let logfile = ldir </> lfile
|
|
|
|
bracket (createFile (toFilePath logfile) newFilePerms) closeFd action
|
|
|
|
where
|
|
|
|
action fd = do
|
|
|
|
pid <- SPPB.forkProcess $ do
|
|
|
|
-- dup stdout
|
|
|
|
void $ dupTo fd stdOutput
|
|
|
|
|
|
|
|
-- dup stderr
|
|
|
|
void $ dupTo fd stdError
|
|
|
|
|
|
|
|
-- execute the action
|
|
|
|
maybe (pure ()) (changeWorkingDirectory . toFilePath) chdir
|
|
|
|
SPPB.executeFile exe spath args env
|
|
|
|
|
|
|
|
|
|
|
|
SPPB.getProcessStatus True True pid >>= \case
|
2020-03-08 17:30:08 +00:00
|
|
|
i@(Just (SPPB.Exited _)) -> pure $ toProcessError exe args i
|
2020-03-05 17:02:59 +00:00
|
|
|
i -> pure $ toProcessError exe args i
|
|
|
|
|
|
|
|
|
2020-01-17 22:29:16 +00:00
|
|
|
-- | Capture the stdout and stderr of the given action, which
|
|
|
|
-- is run in a subprocess. Stdin is closed. You might want to
|
|
|
|
-- 'race' this to make sure it terminates.
|
|
|
|
captureOutStreams :: IO a
|
|
|
|
-- ^ the action to execute in a subprocess
|
2020-02-24 13:56:13 +00:00
|
|
|
-> IO CapturedProcess
|
2020-01-17 22:29:16 +00:00
|
|
|
captureOutStreams action =
|
|
|
|
actionWithPipes $ \(parentStdoutRead, childStdoutWrite) ->
|
|
|
|
actionWithPipes $ \(parentStderrRead, childStderrWrite) -> do
|
|
|
|
pid <- SPPB.forkProcess $ do
|
|
|
|
-- dup stdout
|
|
|
|
void $ dupTo childStdoutWrite stdOutput
|
|
|
|
closeFd childStdoutWrite
|
|
|
|
closeFd parentStdoutRead
|
|
|
|
|
|
|
|
-- dup stderr
|
|
|
|
void $ dupTo childStderrWrite stdError
|
|
|
|
closeFd childStderrWrite
|
|
|
|
closeFd parentStderrRead
|
|
|
|
|
|
|
|
-- execute the action
|
|
|
|
void $ action
|
|
|
|
|
|
|
|
-- close everything we don't need
|
|
|
|
closeFd childStdoutWrite
|
|
|
|
closeFd childStderrWrite
|
|
|
|
|
|
|
|
SPPB.getProcessStatus True True pid >>= \case
|
|
|
|
-- readFd will take care of closing the fd
|
|
|
|
Just (SPPB.Exited es) -> do
|
2020-02-19 12:30:18 +00:00
|
|
|
stdout' <- L.toStrict <$> readFd parentStdoutRead
|
|
|
|
stderr' <- L.toStrict <$> readFd parentStderrRead
|
2020-02-24 13:56:13 +00:00
|
|
|
pure $ CapturedProcess { _exitCode = es
|
2020-02-29 23:07:39 +00:00
|
|
|
, _stdOut = stdout'
|
|
|
|
, _stdErr = stderr'
|
|
|
|
}
|
2020-02-24 13:56:13 +00:00
|
|
|
_ -> throwIO $ userError $ ("No such PID " ++ show pid)
|
2020-01-17 22:29:16 +00:00
|
|
|
|
|
|
|
where
|
|
|
|
actionWithPipes a =
|
|
|
|
createPipe >>= \(p1, p2) -> (flip finally) (cleanup [p1, p2]) $ a (p1, p2)
|
|
|
|
cleanup fds = for_ fds $ \fd -> handleIO (\_ -> pure ()) $ closeFd fd
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
-- | Create a new regular file in write-only mode. The file must not exist.
|
|
|
|
createRegularFileFd :: FileMode -> Path b -> IO Fd
|
2020-02-16 21:06:07 +00:00
|
|
|
createRegularFileFd fm dest =
|
|
|
|
FD.openFd (toFilePath dest) WriteOnly [oExcl] (Just fm)
|
2020-02-19 12:30:18 +00:00
|
|
|
|
|
|
|
|
2020-03-03 00:59:19 +00:00
|
|
|
-- | Thin wrapper around `executeFile`.
|
|
|
|
exec :: ByteString -- ^ thing to execute
|
2020-02-19 19:54:23 +00:00
|
|
|
-> Bool -- ^ whether to search PATH for the thing
|
2020-03-03 00:59:19 +00:00
|
|
|
-> [ByteString] -- ^ args for the thing
|
2020-02-19 19:54:23 +00:00
|
|
|
-> Maybe (Path Abs) -- ^ optionally chdir into this
|
2020-03-03 00:59:19 +00:00
|
|
|
-> Maybe [(ByteString, ByteString)] -- ^ optional environment
|
2020-02-19 19:54:23 +00:00
|
|
|
-> IO (Either ProcessError ())
|
2020-03-03 00:59:19 +00:00
|
|
|
exec exe spath args chdir env = do
|
2020-02-19 12:30:18 +00:00
|
|
|
pid <- SPPB.forkProcess $ do
|
|
|
|
maybe (pure ()) (changeWorkingDirectory . toFilePath) chdir
|
2020-03-03 00:59:19 +00:00
|
|
|
SPPB.executeFile exe spath args env
|
2020-02-19 12:30:18 +00:00
|
|
|
|
2020-02-22 18:21:10 +00:00
|
|
|
fmap (toProcessError exe args) $ SPPB.getProcessStatus True True pid
|
2020-02-19 12:30:18 +00:00
|
|
|
|
|
|
|
|
2020-02-22 18:21:10 +00:00
|
|
|
toProcessError :: ByteString
|
|
|
|
-> [ByteString]
|
|
|
|
-> Maybe ProcessStatus
|
|
|
|
-> Either ProcessError ()
|
|
|
|
toProcessError exe args mps = case mps of
|
|
|
|
Just (SPPB.Exited (ExitFailure i)) -> Left $ NonZeroExit i exe args
|
2020-02-19 12:30:18 +00:00
|
|
|
Just (SPPB.Exited ExitSuccess ) -> Right ()
|
2020-02-22 18:21:10 +00:00
|
|
|
Just (Terminated _ _ ) -> Left $ PTerminated exe args
|
|
|
|
Just (Stopped _ ) -> Left $ PStopped exe args
|
|
|
|
Nothing -> Left $ NoSuchPid exe args
|
|
|
|
|
|
|
|
|
|
|
|
-- | Convert the String to a ByteString with the current
|
|
|
|
-- system encoding.
|
|
|
|
unsafePathToString :: Path b -> IO FilePath
|
2020-03-08 22:54:41 +00:00
|
|
|
unsafePathToString p = do
|
2020-02-22 18:21:10 +00:00
|
|
|
enc <- getLocaleEncoding
|
2020-03-08 22:54:41 +00:00
|
|
|
unsafeUseAsCStringLen (toFilePath p) (peekCStringLen enc)
|
2020-03-03 00:59:19 +00:00
|
|
|
|
|
|
|
|
|
|
|
-- | Search for a file in the search paths.
|
|
|
|
--
|
|
|
|
-- Catches `PermissionDenied` and `NoSuchThing` and returns `Nothing`.
|
|
|
|
searchPath :: [Path Abs] -> Path Rel -> IO (Maybe (Path Abs))
|
|
|
|
searchPath paths needle = go paths
|
|
|
|
where
|
|
|
|
go [] = pure Nothing
|
|
|
|
go (x : xs) =
|
|
|
|
hideErrorDefM PermissionDenied (go xs)
|
|
|
|
$ hideErrorDefM NoSuchThing (go xs)
|
|
|
|
$ do
|
|
|
|
dirStream <- openDirStream (toFilePath x)
|
|
|
|
S.findM (\(_, p) -> isMatch x p) (dirContentsStream dirStream)
|
|
|
|
>>= \case
|
|
|
|
Just _ -> pure $ Just (x </> needle)
|
|
|
|
Nothing -> go xs
|
|
|
|
isMatch basedir p = do
|
|
|
|
if p == toFilePath needle
|
|
|
|
then isExecutable (basedir </> needle)
|
|
|
|
else pure False
|