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|
{- Interface to libmagic
-
- Copyright 2019 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Annex.Magic (
Magic,
MimeType,
initMagicMimeType,
getMagicMimeType,
) where
#ifdef WITH_MAGICMIME
import Magic
import Utility.Env
import Common
#else
type Magic = ()
#endif
initMagicMimeType :: IO (Maybe Magic)
#ifdef WITH_MAGICMIME
initMagicMimeType = catchMaybeIO $ do
m <- magicOpen [MagicMimeType]
liftIO $ getEnv "GIT_ANNEX_DIR" >>= \case
Nothing -> magicLoadDefault m
Just d -> magicLoad m
(d </> "magic" </> "magic.mgc")
return m
#else
initMagicMimeType = return Nothing
#endif
type MimeType = String
getMagicMimeType :: Magic -> FilePath -> IO (Maybe MimeType)
#ifdef WITH_MAGICMIME
getMagicMimeType m f = Just <$> magicFile m f
#else
getMagicMimeType = return Nothing
#endif
|
