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|
--
-- Converting fptools/libraries/ into Hugs useable form.
--
module Main(main) where
import System
import IO
import Directory
import Maybe
import List
import Monad
cpp :: String
cpp = "gcc -P -E -xc -traditional"
wash :: FilePath -> FilePath -> String -> IO ()
wash inp outp extraArgs = do
hPutStrLn stderr ("Pre-processing: " ++ inp)
rc <- System.system cmd
case rc of
ExitSuccess -> return ()
ExitFailure{} -> hPutStrLn stderr ("Error: " ++ show rc)
where
cmd = unwords [ cpp
, "-D__HUGS__"
, "-D__HASKELL98__"
, extraArgs
, inp
, "-o " ++ outp
]
outDir :: String
outDir = "c:/src/hugs98/libraries"
inpDir :: String
inpDir = "c:/fptools/HEAD/libraries"
pathSeparator :: Char
pathSeparator = '/'
isPathSeparator :: Char -> Bool
isPathSeparator '/' = True
isPathSeparator '\\' = True
isPathSeparator _ = False
main :: IO ()
main = do
putStrLn "Converting the Haskell hierarchical libraries into Hugs friendly form"
putStrLn ("Source directory: " ++ inpDir)
putStrLn ("Output directory: " ++ outDir)
isThere <- doesDirectoryExist inpDir
when (not isThere)
(hPutStrLn stderr "input directory does not exist, stopping." >> exitSuccess)
isThere <- doesDirectoryExist outDir
when (not isThere)
(hPutStrLn stderr "output directory does not exist, stopping." >> exitSuccess)
fs <- findAllFilesMatching pathFilter fileFilter inpDir
print "done"
let theFs = mapMaybe ofInterest fs
mapM_ washFile theFs
return ()
where
pathFilter :: [FilePath] -> Bool
pathFilter [] = True
pathFilter ("CVS":_) = False
pathFilter fs@(x:_) | "_split" `isSuffixOf` x = False
pathFilter _ = True
fileFilter :: [FilePath] -> Bool
fileFilter = withSuffix ["hs", "lhs"]
ofInterest :: [String] -> Maybe ([String], Maybe String)
ofInterest comps = Just (comps, Nothing)
washFile (comps, mbArgs) = do
makeDirectory oDir
wash (inpDir ++ pathSeparator : relNm)
(outDir ++ pathSeparator : relNm)
(fromMaybe "" mbArgs)
where
rcomps = reverse comps
relDir = concat (intersperse [pathSeparator] (reverse (tail comps)))
relNm = concat (intersperse [pathSeparator] rcomps)
oDir = outDir ++ pathSeparator:relDir
exitSuccess = exitWith ExitSuccess
{-
Given a base directory, locate all files satisfying 'pred' in
that directory tree.
The files returned are all in
-}
findAllFilesMatching :: ([String] -> Bool)
-> ([String] -> Bool)
-> FilePath
-> IO [[String]]
findAllFilesMatching predPath predFile base = go []
where
go prefix = do
ls <- getDirectoryContents fPath
let entries = filter (not.isHereUp) ls
stuff <- mapM (\ f -> classifyEntry (f:prefix) (mkFilePath base prefix f)) entries
let (dirs, allFiles) = unzipEithers stuff
theFiles = filter predFile allFiles
print theFiles
lss <- mapM go (filter predPath dirs)
return (theFiles ++ concat lss)
where
fPath = mkFilePath base prefix ""
makeDirectory :: FilePath -> IO ()
makeDirectory fpath = do
flg <- doesDirectoryExist fpath
print (fpath,flg,dirName fpath)
if flg
then return ()
else do
-- try creating the parent.
case dirName fpath of
"" -> createDirectory fpath
"./" -> createDirectory fpath
d -> do
flg <- doesDirectoryExist d
when (not flg) (makeDirectory d)
createDirectory fpath
classifyEntry f fpath = do
flg <- doesDirectoryExist fpath
return ((case flg of { True -> Left; _ -> Right}) f)
mkFilePath :: FilePath -> [String] -> String -> FilePath
mkFilePath base comps s = foldr (\ x acc -> acc ++ pathSeparator:x) base (consL s comps)
where
consL [] xs = xs
consL x xs = x:xs
isHereUp :: FilePath -> Bool
isHereUp "." = True
isHereUp ".." = True
isHereUp _ = False
unzipEithers :: [Either a b] -> ([a], [b])
unzipEithers [] = ([], [])
unzipEithers (x:xs) =
case x of
Left v -> (v:as, bs)
Right v -> (as, v:bs)
where
(as,bs) = unzipEithers xs
withSuffix :: [String] -> [String] -> Bool
withSuffix _ [] = False
withSuffix sufs (s:_) = fileSuffix s `elem` sufs
hasSuffix [] = False
hasSuffix (x:_) = not (null (fileSuffix x))
-- FileUtil outtakes:
dirName :: FilePath -> FilePath
dirName fname =
case revDropWhile (not.isPathSeparator) (revDropWhile isPathSeparator fname) of
"" -> "./" -- no separator was found, dir-name is "."
xs -> xs
revDropWhile :: (a -> Bool) -> [a] -> [a]
revDropWhile p = foldr f []
where f x [] = if p x then [] else [x]
f x xs = (x:xs)
-- suffix _does not_ include the dot. In case there isn't a suffix,
-- return empty string.
fileSuffix :: FilePath -> String
fileSuffix = findLast (=='.') ""
findLast :: (Char -> Bool)
-> String
-> String
-> String
findLast pred noMatch f = go False f f
where
go matched acc []
| matched = acc
| otherwise = noMatch
go matched acc (x:xs)
| pred x = go True xs xs
| otherwise = go matched acc xs
|
