module Development.Shake.Derived(
system', systemCwd, systemOutput,
copyFile', copyFileChanged,
readFile', readFileLines,
writeFile', writeFileLines, writeFileChanged
) where
import Control.Monad
import Control.Monad.IO.Class
import System.Process
import System.Directory
import System.Exit
import System.IO
import Development.Shake.Core
import Development.Shake.Rules.File
import Development.Shake.FilePath
import Development.Shake.Types
import General.Base
import qualified Data.ByteString as BS
checkExitCode :: String -> ExitCode -> Action ()
checkExitCode cmd ExitSuccess = return ()
checkExitCode cmd (ExitFailure i) = error $ "System command failed (code " ++ show i ++ "):\n" ++ cmd
system' :: FilePath -> [String] -> Action ()
system' path args = do
let path2 = toNative path
let cmd = unwords $ path2 : args
v <- getVerbosity
putLoud cmd
res <- (if v >= Loud then quietly else id) $ traced (takeBaseName path) $ rawSystem path2 args
checkExitCode cmd res
systemCwd :: FilePath -> FilePath -> [String] -> Action ()
systemCwd cwd path args = do
let path2 = toNative path
let cmd = unwords $ path2 : args
putLoud cmd
res <- traced (takeBaseName path) $ do
hdl <- runProcess path2 args (Just cwd) Nothing Nothing Nothing Nothing
waitForProcess hdl
checkExitCode cmd res
systemOutput :: FilePath -> [String] -> Action (String, String)
systemOutput path args = do
let path2 = toNative path
let cmd = unwords $ path2 : args
putLoud cmd
(res,stdout,stderr) <- traced (takeBaseName path) $ readProcessWithExitCode path2 args ""
checkExitCode cmd res
return (stdout, stderr)
copyFile' :: FilePath -> FilePath -> Action ()
copyFile' old new = do
need [old]
putLoud $ "Copying from " ++ old ++ " to " ++ new
liftIO $ copyFile old new
copyFileChanged :: FilePath -> FilePath -> Action ()
copyFileChanged old new = do
need [old]
eq <- liftIO $ doesFileExist new &&^ do
withBinaryFile old ReadMode $ \h1 -> withBinaryFile new ReadMode $ \h2 ->
liftM2 (==) (hFileSize h1) (hFileSize h2) &&^
liftM2 (==) (BS.hGetContents h1) (BS.hGetContents h2)
when (not eq) $ do
putLoud $ "Copying from " ++ old ++ " to " ++ new
liftIO $ copyFile old new
readFile' :: FilePath -> Action String
readFile' x = need [x] >> liftIO (readFile x)
writeFile' :: FilePath -> String -> Action ()
writeFile' name x = liftIO $ writeFile name x
readFileLines :: FilePath -> Action [String]
readFileLines = fmap lines . readFile'
writeFileLines :: FilePath -> [String] -> Action ()
writeFileLines name = writeFile' name . unlines
writeFileChanged :: FilePath -> String -> Action ()
writeFileChanged name x = liftIO $ do
b <- doesFileExist name
if not b then writeFile name x else do
b <- withFile name ReadMode $ \h -> do
src <- hGetContents h
return $! src /= x
when b $ writeFile name x