{- darcs-monitor - Darcs repository monitor
Copyright © 2007 Antti-Juhani Kaijanaho
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 2 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-}
module Darcs where
import Control.Monad.Trans
import System.Exit
import System.IO
import System.Process
import Config
-- runs darcs with args and returns what it outputs
invokeDarcs :: (MonadConfig m, MonadIO m) =>
[String] -> m String
invokeDarcs args = do
darcs <- asks confDarcsPath
cargs <- asks confDarcsArgs
let as' = cargs ++ args
liftIO $ do (inh, outh, errh, ph) <-
runInteractiveProcess darcs as' Nothing Nothing
hClose inh
hSetBinaryMode outh True
rv <- hGetContents outh
err <- hGetContents errh
length rv `seq` hClose outh
length err `seq` hClose errh
hPutStr stderr err
ec <- waitForProcess ph
when (ec /= ExitSuccess) $ ioError $ userError "darcs failed"
return rv