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{-
Copyright (C) 2017-2018 defanor <defanor@uberspace.net>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
-}
{- |
Module : Pancake.Common
Maintainer : defanor <defanor@uberspace.net>
Stability : unstable
Portability : portable
Utility functions.
-}
module Pancake.Common ( putErrLn, escapeURI ) where
import System.IO
import Control.Monad.IO.Class
import Network.URI
import System.FilePath
-- | Prints a line into stderr.
putErrLn :: MonadIO m => String -> m ()
putErrLn s = liftIO $ do
hPutStrLn stderr s
hFlush stderr
-- | Escapes an URI for use as a file name.
escapeURI :: URI -> FilePath
escapeURI u = map escapeChar $ uriToString id u ""
where escapeChar c
| isPathSeparator c = '-'
| otherwise = c
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