Move some functionality from HPath to System.Posix.FilePath
This also removes 'canonicalizePath' from HPath which fixes the doctest.
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119
src/HPath.hs
119
src/HPath.hs
@ -31,7 +31,6 @@ module HPath
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,parseFn
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,parseRel
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-- * Path Conversion
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,canonicalizePath
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,fromAbs
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,fromRel
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,normalize
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@ -47,11 +46,6 @@ module HPath
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,withAbsPath
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,withRelPath
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,withFnPath
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-- * ByteString/Word8 constants
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,nullByte
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,pathDot
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,pathDot'
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,pathSeparator'
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-- * ByteString operations
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,fpToString
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,userStringToFP
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@ -68,14 +62,12 @@ import Control.Exception (Exception)
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import Control.Monad.Catch (MonadThrow(..))
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import Data.ByteString(ByteString)
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import qualified Data.ByteString as BS
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import Data.ByteString.UTF8 (fromString, toString)
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import Data.Data
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import qualified Data.List as L
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import Data.Maybe
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import Data.Word8
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import HPath.Internal
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import System.Posix.FilePath hiding ((</>))
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import System.Posix.Directory.Traversals(realpath)
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--------------------------------------------------------------------------------
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@ -174,7 +166,8 @@ parseRel :: MonadThrow m
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=> ByteString -> m (Path Rel)
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parseRel filepath =
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if not (isAbsolute filepath) &&
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filepath /= pathDot' && filepath /= pathDoubleDot &&
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filepath /= BS.singleton _period &&
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filepath /= BS.pack [_period, _period] &&
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not (hasParentDir filepath) &&
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isValid filepath
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then return (MkPath $ normalise filepath)
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@ -210,7 +203,8 @@ parseFn :: MonadThrow m
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=> ByteString -> m (Path Fn)
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parseFn filepath =
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if isFileName filepath &&
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filepath /= pathDot' && filepath /= pathDoubleDot &&
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filepath /= BS.singleton _period &&
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filepath /= BS.pack [_period, _period] &&
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isValid filepath
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then return (MkPath filepath)
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else throwM (InvalidFn filepath)
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@ -312,7 +306,7 @@ isParentOf p l = isJust (stripDir p l :: Maybe (Path Rel))
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-- []
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getAllParents :: Path Abs -> [Path Abs]
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getAllParents (MkPath p)
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| np == pathSeparator' = []
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| np == BS.singleton pathSeparator = []
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| otherwise = dirname (MkPath np) : getAllParents (dirname $ MkPath np)
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where
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np = dropTrailingPathSeparator . normalise $ p
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@ -356,13 +350,6 @@ basename (MkPath l)
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-- Path IO helpers
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-- | May fail on `realpath`.
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canonicalizePath :: Path Abs -> IO (Path Abs)
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canonicalizePath (MkPath l) = do
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nl <- realpath l
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return $ MkPath nl
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withAbsPath :: Path Abs -> (ByteString -> IO a) -> IO a
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withAbsPath (MkPath p) action = action p
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@ -393,100 +380,16 @@ withFnPath (MkPath p) action = action p
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-- False
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hiddenFile :: Path Fn -> Bool
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hiddenFile (MkPath fp)
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| fp == pathDoubleDot = False
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| fp == pathDot' = False
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| otherwise = pathDot' `BS.isPrefixOf` fp
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--------------------------------------------------------------------------------
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-- ByteString/Word8 constants
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pathSeparator' :: ByteString
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pathSeparator' = BS.singleton pathSeparator
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pathDot :: Word8
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pathDot = _period
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pathDot' :: ByteString
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pathDot' = BS.singleton pathDot
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pathDoubleDot :: ByteString
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pathDoubleDot = pathDot `BS.cons` pathDot'
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nullByte :: Word8
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nullByte = _nul
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--------------------------------------------------------------------------------
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-- ByteString Operations
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-- |Uses UTF-8 decoding to convert the bytestring into a String.
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fpToString :: ByteString -> String
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fpToString = toString
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-- |Uses UTF-8 encoding to convert a user provided String into
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-- a ByteString, which represents a filepath.
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userStringToFP :: String -> ByteString
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userStringToFP = fromString
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| fp == BS.pack [_period, _period] = False
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| fp == BS.pack [_period] = False
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| otherwise = BS.pack [extSeparator]
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`BS.isPrefixOf` fp
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------------------------
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-- ByteString helpers
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#if MIN_VERSION_bytestring(0,10,8)
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#else
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stripPrefix :: ByteString -> ByteString -> Maybe ByteString
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stripPrefix a b = BS.pack `fmap` L.stripPrefix (BS.unpack a) (BS.unpack b)
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#endif
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--------------------------------------------------------------------------------
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-- ByteString Query functions
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-- | Helper function: check if the filepath has any parent directories in it.
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--
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-- >>> hasParentDir "/.."
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-- True
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-- >>> hasParentDir "foo/bar/.."
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-- True
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-- >>> hasParentDir "foo/../bar/."
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-- True
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-- >>> hasParentDir "foo/bar"
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-- False
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-- >>> hasParentDir "foo"
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-- False
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-- >>> hasParentDir ""
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-- False
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-- >>> hasParentDir ".."
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-- False
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hasParentDir :: ByteString -> Bool
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hasParentDir filepath =
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((pathSeparator `BS.cons` pathDoubleDot) `BS.isSuffixOf` filepath) ||
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((pathSeparator' `BS.append` pathDoubleDot `BS.append` pathSeparator')
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`BS.isInfixOf` filepath) ||
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((pathDoubleDot `BS.append` pathSeparator') `BS.isPrefixOf` filepath)
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-- | Is the given filename a valid filename?
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--
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-- >>> isFileName "lal"
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-- True
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-- >>> isFileName "."
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-- True
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-- >>> isFileName ".."
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-- True
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-- >>> isFileName ""
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-- False
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-- >>> isFileName "\0"
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-- False
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-- >>> isFileName "/random_ path:*"
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-- False
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isFileName :: ByteString -> Bool
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isFileName filepath =
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not (pathSeparator' `BS.isInfixOf` filepath) &&
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not (BS.null filepath) &&
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not (nullByte `BS.elem` filepath)
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@ -47,13 +47,19 @@ module System.Posix.FilePath (
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, isRelative
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, isAbsolute
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, isValid
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, isFileName
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, hasParentDir
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, equalFilePath
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, fpToString
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, userStringToFP
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, module System.Posix.ByteString.FilePath
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) where
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import Data.ByteString (ByteString)
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import qualified Data.ByteString as BS
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import Data.ByteString.UTF8 (fromString, toString)
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import System.Posix.ByteString.FilePath
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import Data.Maybe (isJust)
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@ -496,6 +502,58 @@ isValid filepath
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| _nul `BS.elem` filepath = False
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| otherwise = True
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-- | Is the given filename a valid filename?
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--
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-- >>> isFileName "lal"
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-- True
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-- >>> isFileName "."
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-- True
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-- >>> isFileName ".."
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-- True
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-- >>> isFileName ""
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-- False
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-- >>> isFileName "\0"
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-- False
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-- >>> isFileName "/random_ path:*"
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-- False
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isFileName :: ByteString -> Bool
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isFileName filepath =
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not (BS.singleton pathSeparator `BS.isInfixOf` filepath) &&
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not (BS.null filepath) &&
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not (_nul `BS.elem` filepath)
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-- | Helper function: check if the filepath has any parent directories in it.
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--
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-- >>> hasParentDir "/.."
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-- True
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-- >>> hasParentDir "foo/bar/.."
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-- True
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-- >>> hasParentDir "foo/../bar/."
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-- True
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-- >>> hasParentDir "foo/bar"
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-- False
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-- >>> hasParentDir "foo"
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-- False
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-- >>> hasParentDir ""
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-- False
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-- >>> hasParentDir ".."
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-- False
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hasParentDir :: ByteString -> Bool
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hasParentDir filepath =
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((pathSeparator `BS.cons` pathDoubleDot)
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`BS.isSuffixOf` filepath
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) ||
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((BS.singleton pathSeparator
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`BS.append` pathDoubleDot
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`BS.append` BS.singleton pathSeparator
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) `BS.isInfixOf` filepath
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) ||
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((pathDoubleDot `BS.append` BS.singleton pathSeparator
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) `BS.isPrefixOf` filepath
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)
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where
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pathDoubleDot = BS.pack [_period, _period]
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-- |Equality of two filepaths. The filepaths are normalised
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-- and trailing path separators are dropped.
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--
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@ -518,6 +576,20 @@ equalFilePath p1 p2 = f p1 == f p2
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where
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f x = dropTrailingPathSeparator $ normalise x
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------------------------
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-- conversion
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-- |Uses UTF-8 decoding to convert the bytestring into a String.
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fpToString :: ByteString -> String
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fpToString = toString
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-- |Uses UTF-8 encoding to convert a user provided String into
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-- a ByteString, which represents a filepath.
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userStringToFP :: String -> ByteString
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userStringToFP = fromString
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------------------------
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-- internal stuff
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