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|
-- cabal-helper: Simple interface to Cabal's configuration state
-- Copyright (C) 2018 Daniel Gröber <cabal-helper@dxld.at>
--
-- 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 : CabalHelper.Compiletime.Process
Description : System process utilities
License : GPL-3
-}
module CabalHelper.Compiletime.Process
( module CabalHelper.Compiletime.Process
, module System.Process
) where
import Data.Char
import Data.List
import GHC.IO.Exception (IOErrorType(OtherError))
import System.IO
import System.IO.Error
import System.Exit
import System.Process
import CabalHelper.Compiletime.Types
import CabalHelper.Compiletime.Log
readProcess' :: Verbose => FilePath -> [String] -> String -> IO String
readProcess' exe args inp = do
vLog $ intercalate " " $ map formatProcessArg (exe:args)
outp <- readProcess exe args inp
vLog $ unlines $ map ("=> "++) $ lines outp
return outp
callProcessStderr'
:: Verbose => Maybe FilePath -> FilePath -> [String] -> IO ExitCode
callProcessStderr' mwd exe args = do
let cd = case mwd of
Nothing -> []; Just wd -> [ "cd", formatProcessArg wd++";" ]
vLog $ intercalate " " $ cd ++ map formatProcessArg (exe:args)
(_, _, _, h) <- createProcess (proc exe args) { std_out = UseHandle stderr
, cwd = mwd }
waitForProcess h
callProcessStderr :: Verbose => Maybe FilePath -> FilePath -> [String] -> IO ()
callProcessStderr mwd exe args = do
rv <- callProcessStderr' mwd exe args
case rv of
ExitSuccess -> return ()
ExitFailure v -> processFailedException "callProcessStderr" exe args v
processFailedException :: String -> String -> [String] -> Int -> IO a
processFailedException fn exe args rv =
ioError $ mkIOError OtherError msg Nothing Nothing
where
msg = concat [ fn, ": ", exe, " "
, intercalate " " (map formatProcessArg args)
, " (exit " ++ show rv ++ ")"
]
formatProcessArg :: String -> String
formatProcessArg xs
| any isSpace xs = "'"++ xs ++"'"
| otherwise = xs
|
