70 lines
2 KiB
Haskell
70 lines
2 KiB
Haskell
{- git-annex file permissions
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-
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- Copyright 2012 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Annex.Perms (
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setAnnexPerm,
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annexFileMode,
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createAnnexDirectory,
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noUmask,
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) where
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import Common.Annex
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import Utility.FileMode
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import Git.SharedRepository
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import qualified Annex
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import System.Posix.Types
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withShared :: (SharedRepository -> Annex a) -> Annex a
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withShared a = maybe startup a =<< Annex.getState Annex.shared
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where
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startup = do
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shared <- fromRepo getSharedRepository
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Annex.changeState $ \s -> s { Annex.shared = Just shared }
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a shared
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{- Sets appropriate file mode for a file or directory in the annex,
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- other than the content files and content directory. Normally,
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- use the default mode, but with core.sharedRepository set,
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- allow the group to write, etc. -}
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setAnnexPerm :: FilePath -> Annex ()
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setAnnexPerm file = withShared $ liftIO . go
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where
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go GroupShared = groupWriteRead file
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go AllShared = modifyFileMode file $ addModes $
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[ ownerWriteMode, groupWriteMode ] ++ readModes
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go _ = return ()
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{- Gets the appropriate mode to use for creating a file in the annex
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- (other than content files, which are locked down more). -}
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annexFileMode :: Annex FileMode
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annexFileMode = withShared $ return . go
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where
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go GroupShared = sharedmode
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go AllShared = combineModes (sharedmode:readModes)
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go _ = stdFileMode
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sharedmode = combineModes
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[ ownerWriteMode, groupWriteMode
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, ownerReadMode, groupReadMode
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]
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{- Creates a directory inside the gitAnnexDir, including any parent
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- directories. Makes directories with appropriate permissions. -}
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createAnnexDirectory :: FilePath -> Annex ()
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createAnnexDirectory dir = traverse dir [] =<< top
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where
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top = parentDir <$> fromRepo gitAnnexDir
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traverse d below stop
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| d `equalFilePath` stop = done
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| otherwise = ifM (liftIO $ doesDirectoryExist d)
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( done
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, traverse (parentDir d) (d:below) stop
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)
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where
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done = forM_ below $ \p -> do
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liftIO $ createDirectory p
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setAnnexPerm p
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