module Debian.Deb where
import Control.Monad
import Data.ByteString.Lazy (empty)
import Debian.Control.Common
import System.Unix.Directory
import System.Unix.FilePath
import System.Unix.Process
fields :: (ControlFunctions a) => FilePath -> IO (Control' a)
fields debFP =
withTemporaryDirectory ("fields.XXXXXX") $ \tmpdir ->
do debFP <- realpath debFP
withWorkingDirectory tmpdir $
do (out, err, res) <- lazyProcess "ar" ["x",debFP,"control.tar.gz"] Nothing Nothing empty >>= return . collectOutputUnpacked
when (res /= ExitSuccess) (error $ "Dpkg.fields: " ++ out ++ "\n" ++ err ++ "\n" ++ show res)
(out, err, res) <- lazyProcess "tar" ["xzf", "control.tar.gz", "./control"] Nothing Nothing empty >>= return . collectOutputUnpacked
when (res /= ExitSuccess) (error $ "Dpkg.fields: " ++ out ++ "\n" ++ err ++ "\n" ++ show res)
c <- parseControlFromFile "control"
case c of
Left e -> error (show e)
(Right c) -> return c