44 lines
1.2 KiB
Haskell
44 lines
1.2 KiB
Haskell
import Control.Monad
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import Data.Char (toLower)
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import Text.Printf (printf)
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import Crypto.Hash.SHA1 (hash)
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import System.Environment (getArgs)
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import System.Directory
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import System.FilePath.Posix
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import qualified Data.ByteString as B
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getDirectoryFiles :: FilePath -> IO [FilePath]
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getDirectoryFiles path =
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map (path </>) <$> getDirectoryContents path >>= filterM doesFileExist
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fileHash :: FilePath -> IO String
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fileHash = fmap (hex . hash) . B.readFile
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hex :: B.ByteString -> String
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hex bytes = B.unpack bytes >>= printf "%02X"
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newName :: FilePath -> IO FilePath
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newName path = do
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hash <- take 10 <$> fileHash path
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let (file, ext) = splitExtension path
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(dir, base) = splitFileName file
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new = dir </> hash <.> map toLower ext
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if null base
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then return path
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else return new
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main = do
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args <- getArgs
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path <- case args of
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[] -> getCurrentDirectory
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x:_ -> return x
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putStrLn ("Renaming files in " ++ path)
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files <- getDirectoryFiles path
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names <- mapM newName files
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forM (zip files names) $ \(x, y) -> do
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let x' = takeFileName x
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y' = takeFileName y
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putStrLn (printf "%s -> %s" x' y')
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renameFile x y
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putStrLn "Files renamed successfully" |