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|
{- Allows linking haskell programs too big for all the files to fit in a
- command line.
-
- Copyright 2013 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Main where
import Data.Maybe
import Data.Either
import Data.List
import Data.List.Utils
import Text.Parsec
import Text.Parsec.String
import Control.Applicative ((<$>))
import Control.Monad
import Utility.Monad
import Utility.Process
import System.Directory
data CmdParams = CmdParams { cmd :: String, opts :: String }
deriving (Show)
{- Find where ghc calls gcc to link the executable. -}
parseGhcLink :: Parser CmdParams
parseGhcLink = do
many prelinkline
linkheaderline
char '"'
gcccmd <- many1 (noneOf "\"")
string "\" "
gccparams <- restOfLine
return $ CmdParams gcccmd (manglepaths gccparams)
where
linkheaderline = do
string "*** Linker"
restOfLine
prelinkline = do
notFollowedBy linkheaderline
restOfLine
manglepaths = replace "\\" "/"
{- Find where gcc calls collect2. -}
parseGccLink :: Parser CmdParams
parseGccLink = do
many precollectenvline
env <- collectenvline
try $ char ' '
path <- manyTill anyChar (try $ string collectcmd)
char ' '
collect2params <- restOfLine
return $ CmdParams (path ++ collectcmd) (escapeDosPaths collect2params)
where
collectcmd = "collect2.exe"
collectenv = "COLLECT_GCC_OPTIONS"
collectenvline = do
string collectenv
char '='
restOfLine
precollectenvline = do
notFollowedBy collectenvline
restOfLine
{- Input contains something like
- c:/program files/haskell platform/foo -LC:/Program Files/Haskell Platform/ -L...
- and the *right* spaces must be escaped with \
-
- Argh.
-}
escapeDosPaths :: String -> String
escapeDosPaths = replace "Program Files" "Program\\ Files"
. replace "program files" "program\\ files"
. replace "Haskell Platform" "Haskell\\ Platform"
. replace "haskell platform" "haskell\\ platform"
{- Find where collect2 calls ld. -}
parseCollect2 :: Parser CmdParams
parseCollect2 = error "TODO"
restOfLine :: Parser String
restOfLine = newline `after` many (noneOf "\n")
{- Intentionally ignores command failure; the whole point is to work around
- that. -}
getOutput :: String -> [String] -> IO String
getOutput cmd params = do
putStrLn $ unwords [cmd, show params]
(log, _ok) <- processTranscript cmd params Nothing
return log
runParser' :: Parser a -> String -> a
runParser' p s = either (error . show) id (parse p "" s)
atFile :: FilePath -> String
atFile f = '@':f
runAtFile :: Parser CmdParams -> String -> FilePath -> [String] -> IO String
runAtFile p s f extraparams = do
writeFile f (opts c)
out <- getOutput (cmd c) (atFile f:extraparams)
removeFile f
return out
where
c = runParser' p s
main = do
ghcout <- getOutput "cabal"
["build", "--ghc-options=-v -keep-tmp-files"]
gccout <- runAtFile parseGhcLink ghcout "gcc.opt" ["-v"]
writeFile "gcc.out" gccout
collect2out <- runAtFile parseGccLink gccout "collect2.opt" ["-v"]
writeFile "collect2.out" collect2out
void $ runAtFile parseCollect2 collect2out "ld.opt" []
|
