module Propellor.Shim (setup, cleanEnv, file) where
import Propellor.Base
import Utility.LinuxMkLibs
import Utility.FileMode
import Data.List
import System.Posix.Files
setup :: FilePath -> Maybe FilePath -> FilePath -> IO FilePath
setup propellorbin propellorbinpath dest = checkAlreadyShimmed propellorbin $ do
createDirectoryIfMissing True dest
mapM_ nukeFile =<< dirContentsRecursive dest
libs <- parseLdd <$> readProcess "ldd" [propellorbin]
glibclibs <- glibcLibs
let libs' = nub $ libs ++ glibclibs
libdirs <- map (dest ++) . nub . catMaybes
<$> mapM (installLib installFile dest) libs'
let linker = (dest ++) $
fromMaybe (error "cannot find ld-linux linker") $
headMaybe $ filter ("ld-linux" `isInfixOf`) libs'
let linkersym = takeDirectory linker </> takeFileName propellorbin
createSymbolicLink (takeFileName linker) linkersym
let gconvdir = (dest ++) $ takeDirectory $
fromMaybe (error "cannot find gconv directory") $
headMaybe $ filter ("/gconv/" `isInfixOf`) glibclibs
let linkerparams = ["--library-path", intercalate ":" libdirs ]
writeFile shim $ unlines
[ shebang
, "GCONV_PATH=" ++ shellEscape gconvdir
, "export GCONV_PATH"
, "exec " ++ unwords (map shellEscape $ linkersym : linkerparams) ++
" " ++ shellEscape (fromMaybe propellorbin propellorbinpath) ++ " \"$@\""
]
modifyFileMode shim (addModes executeModes)
return shim
where
shim = file propellorbin dest
shebang :: String
shebang = "#!/bin/sh"
checkAlreadyShimmed :: FilePath -> IO FilePath -> IO FilePath
checkAlreadyShimmed f nope = ifM (doesFileExist f)
( withFile f ReadMode $ \h -> do
s <- hGetLine h
if s == shebang
then return f
else nope
, nope
)
cleanEnv :: IO ()
cleanEnv = void $ unsetEnv "GCONV_PATH"
file :: FilePath -> FilePath -> FilePath
file propellorbin dest = dest </> takeFileName propellorbin
installFile :: FilePath -> FilePath -> IO ()
installFile top f = do
createDirectoryIfMissing True destdir
nukeFile dest
createLink f dest `catchIO` const copy
where
copy = void $ boolSystem "cp" [Param "-a", Param f, Param dest]
destdir = inTop top $ takeDirectory f
dest = inTop top f