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