Created
August 2, 2024 15:50
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| glob :: forall m . MonadIO m | |
| => [FilePattern] -- ^ search patterns | |
| -> [FilePattern] -- ^ ignore patterns | |
| -> FilePath -- ^ directory | |
| -> (FilePath -> m Bool) -- ^ file action | |
| -> m () | |
| glob pat ignore dir action = do | |
| q <- newTQueueIO | |
| void $ liftIO (async $ go q dir >> atomically (writeTQueue q Nothing)) | |
| fix $ \next -> do | |
| atomically (readTQueue q) >>= \case | |
| Nothing -> pure () | |
| Just x -> do | |
| r <- action x | |
| when r next | |
| where | |
| matches p f = or [ i ?== f | i <- p ] | |
| skip p = or [ i ?== p | i <- ignore ] | |
| go q f = do | |
| isD <- doesDirectoryExist f | |
| if not isD then do | |
| isF <- doesFileExist f | |
| when (isF && matches pat f) do | |
| atomically $ writeTQueue q (Just f) | |
| else do | |
| co' <- (try @_ @IOError $ listDirectory f) | |
| <&> fromRight mempty | |
| let co = [ normalise (f </> x) | x <- co' ] | |
| & filter (not . skip) | |
| forConcurrently_ co (go q) |
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