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module Process (sh, sh_, quote) where
import Control.Exception (Exception, throwIO)
import Data.ByteString.Lazy (ByteString)
import System.Exit (ExitCode (ExitSuccess))
import System.Process.Typed (ProcessConfig, readProcess, readProcessStderr)
data ProcessException = ProcessException String ExitCode ByteString
deriving (Show)
instance Exception ProcessException
sh :: ProcessConfig stdin stdoutIgnored stderr -> IO ByteString
sh proc = do
(exitCode, out, err) <- readProcess proc
if exitCode == ExitSuccess
then pure out
else throwIO $ ProcessException (show proc) exitCode err
sh_ :: ProcessConfig stdin stdoutIgnored stderr -> IO ()
sh_ proc = do
(exitCode, err) <- readProcessStderr proc
if exitCode == ExitSuccess
then pure ()
else throwIO $ ProcessException (show proc) exitCode err
quote :: String -> String
quote s = "'" ++ escape s ++ "'"
where
escape [] = []
escape ('\'' : cs) = '\'' : '\\' : '\'' : '\'' : escape cs
escape (c : cs) = c : escape cs
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