diff options
Diffstat (limited to 'Utility/Tmp.hs')
-rw-r--r-- | Utility/Tmp.hs | 67 |
1 files changed, 12 insertions, 55 deletions
diff --git a/Utility/Tmp.hs b/Utility/Tmp.hs index 7610f6c..6ee592b 100644 --- a/Utility/Tmp.hs +++ b/Utility/Tmp.hs @@ -1,4 +1,4 @@ -{- Temporary files and directories. +{- Temporary files. - - Copyright 2010-2013 Joey Hess <id@joeyh.name> - @@ -8,31 +8,33 @@ {-# LANGUAGE CPP #-} {-# OPTIONS_GHC -fno-warn-tabs #-} -module Utility.Tmp where +module Utility.Tmp ( + Template, + viaTmp, + withTmpFile, + withTmpFileIn, + relatedTemplate, +) where import System.IO -import System.Directory -import Control.Monad.IfElse import System.FilePath +import System.Directory import Control.Monad.IO.Class -#ifndef mingw32_HOST_OS -import System.Posix.Temp (mkdtemp) -#endif +import System.PosixCompat.Files import Utility.Exception import Utility.FileSystemEncoding -import Utility.PosixFiles type Template = String {- Runs an action like writeFile, writing to a temp file first and - then moving it into place. The temp file is stored in the same - directory as the final file to avoid cross-device renames. -} -viaTmp :: (MonadMask m, MonadIO m) => (FilePath -> String -> m ()) -> FilePath -> String -> m () +viaTmp :: (MonadMask m, MonadIO m) => (FilePath -> v -> m ()) -> FilePath -> v -> m () viaTmp a file content = bracketIO setup cleanup use where (dir, base) = splitFileName file - template = base ++ ".tmp" + template = relatedTemplate (base ++ ".tmp") setup = do createDirectoryIfMissing True dir openTempFile dir template @@ -62,51 +64,6 @@ withTmpFileIn tmpdir template a = bracket create remove use catchBoolIO (removeFile name >> return True) use (name, h) = a name h -{- Runs an action with a tmp directory located within the system's tmp - - directory (or within "." if there is none), then removes the tmp - - directory and all its contents. -} -withTmpDir :: (MonadMask m, MonadIO m) => Template -> (FilePath -> m a) -> m a -withTmpDir template a = do - topleveltmpdir <- liftIO $ catchDefaultIO "." getTemporaryDirectory -#ifndef mingw32_HOST_OS - -- Use mkdtemp to create a temp directory securely in /tmp. - bracket - (liftIO $ mkdtemp $ topleveltmpdir </> template) - removeTmpDir - a -#else - withTmpDirIn topleveltmpdir template a -#endif - -{- Runs an action with a tmp directory located within a specified directory, - - then removes the tmp directory and all its contents. -} -withTmpDirIn :: (MonadMask m, MonadIO m) => FilePath -> Template -> (FilePath -> m a) -> m a -withTmpDirIn tmpdir template = bracketIO create removeTmpDir - where - create = do - createDirectoryIfMissing True tmpdir - makenewdir (tmpdir </> template) (0 :: Int) - makenewdir t n = do - let dir = t ++ "." ++ show n - catchIOErrorType AlreadyExists (const $ makenewdir t $ n + 1) $ do - createDirectory dir - return dir - -{- Deletes the entire contents of the the temporary directory, if it - - exists. -} -removeTmpDir :: MonadIO m => FilePath -> m () -removeTmpDir tmpdir = liftIO $ whenM (doesDirectoryExist tmpdir) $ do -#if mingw32_HOST_OS - -- Windows will often refuse to delete a file - -- after a process has just written to it and exited. - -- Because it's crap, presumably. So, ignore failure - -- to delete the temp directory. - _ <- tryIO $ removeDirectoryRecursive tmpdir - return () -#else - removeDirectoryRecursive tmpdir -#endif - {- It's not safe to use a FilePath of an existing file as the template - for openTempFile, because if the FilePath is really long, the tmpfile - will be longer, and may exceed the maximum filename length. |